TV signal systems: B/H/G, D/K, I, L.

Color systems:

• SECAM;
• NTSC 3.58 MHz; NTSC 4.43 MHz (video input only).

Received channels:

• VHF: E2-E12, R1-R12;
• UHF: E21-E69, R21-R69;
• Cable: SO1-SO5, S1-S2O;
• HYPER: S1-S41.

Power consumption from the network, W:

• models KV-20WS1A/B/D/E/K/R-70;
• model KV-20WS1U - 92.

Maximum output sound power- 2x8 W; subwoofer - 20 watts.

Other features: availability of teletext, fasttext, NICAM sound decoder.

Structurally, the chassis consists of the following boards:

• A - main board;
• C - kinescope board;
• U - blanking pulse generator board;
• K - subwoofer amplifier board;
• H - input/output board for audio and video signals.

Description of the operation of the TV nodes

Power Supply

The power supply unit (PSU) is implemented on the basis of a quasi-resonant converter IC600 (STR-S6707 manufactured by SANKEN). The microcircuit includes a master oscillator, a start-up circuit, protection circuits against overload, overvoltage, overheating, as well as an output stage based on a powerful bipolar transistor. The output voltage of the PSU is regulated by changing the frequency of the converter. The quasi-resonant converter has a significantly higher efficiency compared to pulse-width modulators, which ensures minimum power consumption in standby mode and low heat generation in operation. The block diagram of the STR-S6707 chip is shown in fig. one.

The rectified voltage +300 V from the diode bridge D610 through the primary winding 5-7 of the transformer T602 is supplied to the collector of the key transistor (pin 1) of the microcircuit. The emitter of the transistor (pin 2) is connected to the case through a resistor R605. Resistor R605 acts as a current sensor and ensures that the microcircuit switches to protection mode when the output transistor is overloaded. The signal from the current sensor is fed to the pin. 6 IC600.

The microcircuit is powered (pin 9) in operating mode from a voltage regulator on a Q601 transistor and a Q603 zener diode. In the startup mode, the microcircuit is powered by resistors R604 and R651 connected to the D610 rectifier. A circuit is used to stabilize the output voltage. feedback through optocoupler IC601 and error amplifier IC602. Used for control output voltage+ 117/134 V. This voltage is supplied to the pin. 1 error amplifier. With pin. 2 IC602 error signal is applied to pin. 2 optocouplers IC602. Further, the feedback signal is fed to the pin. 7 IC600 chips.

On transistors Q604, Q603 and Q602, a circuit for switching the power supply to standby mode is implemented. When a low level STDBY signal is received from the pin. 3 microprocessor IC001 to the base of transistor Q604 opens transistor Q603, which shunts the feedback circuit of IC601 through diode D615, which leads to switching the PSU to standby mode.

The PSU generates the following output voltages:

• +117/134 V (14/21") - for line scanning power supply;
• +8 V - to power the sound circuits (the voltage is generated by the IC603 stabilizer);
• +5 V - to power the video processor, sound processor (formed by the IC605 stabilizer);
• +5 V STDBY - to power the microprocessor, control keyboard and photodetector (formed by IC604 stabilizer);
• +18 V - for sound power amplifier, subwoofer amplifier.

Line scanning

Horizontal sync pulses with pin. 12 of the IC301 video processor through the buffer stage on the Q300 transistor enter the base of the Q801 transistor and then, through the matching transformer T801, to the output stage on the Q802 transistor. The load of the output stage is primary winding 1-2 line transformers T802 and line coils of the deflecting system. Voltages are removed from the secondary windings of the transformer to power the kinescope - anode, accelerating and focusing, filament voltage (pin 6) as well as the voltages necessary for the operation of other TV components:

• +24 V (pin 9) - for vertical scanning;
• +190 V (pin 4) - for powering video amplifiers on the kinescope board.

On transistors Q804 and Q805, a parabolic raster distortion correction circuit (E / W correction) is implemented. The P-DRV correction signal is generated by the IC301 video processor (pin 8). For synchronization, a feedback signal is used, taken from the pin. 11 line transformer T802.

On transistors Q617 and Q606, a protection circuit is made for the +117 V supply circuit. The resistor R608 serves as a current sensor. As the load current increases, the negative potential from the resistor is fed to the emitter of Q617, which leads to the opening of transistors Q606, Q803 and blocking of the horizontal pulses entering the base of Q801.

Personnel scan

Frame scanning is performed on IC301 microcircuits (selector, clock and sawtooth voltage generator) and IC501 (STV9379 - power amplifier). The block diagram of the STV9379 chip is shown in fig. 2. sawtooth voltage personnel scan comes from the pin. 7 video processor IC301 on pin. 1 amplifier IC501. A potential of +1.8 V is applied to the second input of the differential amplifier (pin 7).

The purpose of the pins of this microcircuit is given in Table. one.

Table 1

The current through the personnel coils is supplied through the following circuit: pin. 5 IC501 - L501 - cont. 6 CN801 - personnel coils - cont. 5 CN801 - C505 - R507 - housing. The flyback generator provides an increase in the span of the vertical scan output signal using the capacitor C504.

On transistors Q500 and Q501, a vertical raster position correction circuit is made. The correction signal VCENT comes from the pin. 22 microprocessors IC001.

Microprocessor

The microprocessor IC001 (SDA5255-A031 manufactured by SIEMENS) performs the following functions to control the TV: receiving commands from the control panel and keyboard on the front panel, turning the TV on and off, controlling the TV nodes via the I2C bus, providing work in service mode, etc. The microprocessor is powered by +5 and +8 V STDBY voltages. RESET microprocessor is formed by the IC005 chip. The microprocessor contains a ROM (ROM) for storing programs and factory settings and a random access memory (RAM) with a capacity of 1 byte.

The purpose of the main conclusions of the microprocessor is given in table. 2.

table 2

Output number	Designation	Description
1	X-RAY	X-ray protection input. Circuit overload +117 8
2	ITT RST	IC200 sound processor initialization signal. Active level ~ low
3	STDBY	TV turn on signal. High level corresponds to the operating mode, low - to the standby mode
4	LED	Operating/standby indication output
5	PROC DtS	Service socket output
6	MUTE	Mute signal
7	NVMWP	Non-Volatile Memory Write Protection
8	SCL	Clock bus I 2 C
9	SDA	Address/data bus I 2 C
10,24,35	Vss	General
11,28,37	vdd	Power supply +5 V (STDBY)
12,13	XTAL
14,16, 43, 51	NC	Not used
15	RESET	Initialization signal (initial reset) of the microprocessor
17	HVSEL	Selection signal of corresponding blanking signals HV BLK1 or HV BLK2
18	HVBLK1	Blanking signal 1
19	TV/YC	Signal source selection - tuner/input Y (board H). A low level corresponds to receiving a signal from the tuner. The signal is applied to transistor Q312
20	AV1/AV2	External video source selection: SCART connector/H board. High level corresponds to the SCART connector. The signal is applied to the switch IC401
21	HV BLK2	Blanking signal 2
22	VCENT	Vertical position correction signal
23	RGBP	Switching of external/internal RGB signals. Switching is done using the Q118 key and transistors shunting signals from the SCART connector (Q408, Q407, Q4Q6, Q405)
25	FIL 3 SLC	TTX/VPS/WSS data PLL connection pin
26	FIL 2 SLC	Conclusion for connecting the TTX PLL filter
27	FIL 1 SLC	Pin for connecting VPS/WSS PLL filter
29	Iref	Bias current for PLL
30	CVBS	Video signal input from switcher IC004
31	COIN	Tuner video input
32	SWADC	Keyboard login
33	SCART	Control signal from the SCART connector
34	AGC	AGC
36	S1RCS	Input from remote photodetector
38,39	LC	Used to synchronize an external display
40	S1	Keyboard output
41	VBLK	Personnel quenching impulses
42	HBIK	Line damping pulses
44,46	VS	Vertical sync input. The signal is coming out. 3 amplifiers IC501
45	HS	Horizontal sync input. The signal comes from the output. 1 line transformer T802
47	R	Red teletext and menu output
48	G	Green teletext and menu output
49	AT	Teletext and menu blue signal output
50	BLANK	Blanking signal output
52	TV/AV	Video switch control signal IC004. Low level corresponds to the signal selection from the tuner, high - to the external video signal from the IC401 switcher

To store the TV settings, an electrically reprogrammable ROM (EEPROM) IC002 - ST24W04F with a memory capacity of 4 Kbps (2 blocks of 256 bytes) is used. To protect information from random erase / write cycles, a pin is used. 7 chips -WP. If the pin is not connected, then there is no write protection.

Tuner

The tuner is controlled by the IC001 microprocessor via the I 2 C bus. The purpose of the tuner pins is shown in Table. 3.

Table 3

Pin designation	Description
AGC	AGC
SCL	Clock bus I 2 C
SDA	Address/data bus I 2 C
+33V	It is generated from a voltage of +117 V using a stabilizer on the elements R030, D002, C008. Used to form the tuning voltage
GND	General
+5V	Supply voltage +5 V
AM	Audio signal output
QSS	Audio signal output
video	Video output
NC	Not used

video processor

The TV uses an IC301 video processor of the MC44002 type from MOTOROLA. His structural scheme shown in fig. 3. The IC301 video processor provides processing and delay of the luminance signal, extraction and decoding of PAL / SECAM / NTSC color signals, the formation of RGB signals from decoded chrominance signals, brightness and contrast adjustment, automatic maintenance of white balance, beam current limiting, switching of external and internal sources video signals and RGB-signals, the formation of signals for vertical and horizontal scanning. The video processor is controlled by the microprocessor via the I2C bus. The purpose of the outputs of the video processor is given in Table. four.

Table 4

Output number	Designation	Purpose
1	ACC	Automatic control chromaticity
2	V2in	Video input 2
3	I ref	Control voltage of the vertical sweep master oscillator
4	SCL	Clock bus I 2 C
5	SDA	Address/data bus I 2 C
6	V-ramp	Vertical pulse slope correction input
7	V-drive	Vertical pulse output
8	EW drive	Parabolic raster correction signal output
9	I anode	Input for limiting the peak current of the kinescope beams
10	analog contrast	Input for analog contrast adjustment. The contrast decreases to 12 dB when the average value of the current of the kinescope beams is exceeded
11	SCM	External SECAM decoder capacitor
12	H drive	Horizontal sync output
13	HFP	Horizontal Feedback Input
14,15	HIF	Feedback loop filter
16	S gnd	General (measuring)
17,18,19	RGB	RGB signal outputs
20	Facebook	Auto white balance input. A balance is provided in white (beam current 100 μA) and in black (current - 10 μA)
21	FC	Fast switching signal for external RGB signals
22, 23, 24	RGB in	RGB input - teletext signals, menu display, RGB signals from SCART socket
25	Y2	Input 2 brightness signals. Not used
26	B-Y	Delayed color difference input (blue)
27	R-Y	Delayed Color Difference Input (Red)
28	Y1CL	External Capacitor for Luminance Clamp
29	Y1 out	Luminance signal output. Not used
30	SYS	Color system selection signal output
31	SC	Tri-Level Gating Output
32	NTSC	Connecting a quartz resonator for decoding signals in the NTSC system
33	PAL, SCM	Connection of a quartz resonator for signal decoding in PAL, SECAM systems
34	GND	General
35	Vcc	Power supply +5 V
36	B-Y	Blue color difference output
37	R-Y	Red color difference output
38	ID	External Capacitor of Color System Identification Assembly
39	OLF	Generator filter
40	V1 in	Video input 1

The video signal from the VIDEO output of the tuner is fed to the buffer amplifier Q411, Q410, Q409 and is further divided into 4 branches:

• SCART connector;
• through the amplifier on the elements Q006, Q011 - on the pin. 31 microprocessors;
• through switch IC004 - on pin. 30 microprocessor (switch IC004 provides signal source selection: tuner / external AV signal);
• through the switch on the elements Q310, Q311 - to the V1 IN input of the video processor (pin 40). The switch provides a choice of the signal source: tuner / Y signal from the H board.

An additional switch IC401 switches the signals AV1 (SCART) and AV2 (board H) to the switch IC004 and the video processor (pin 2 and 13).

When processing the video signal in the video processor, an external delay line for color difference signals IC302 (MC44140P) is used. The luminance channel delay line is built into the video processor. From its output (pin 17-19), the primary color signals are fed to the kinescope board C. The power supply of the kinescope board amplifiers (+190 V) is removed from the pin. 4 horizontal transformer and rectified using elements D802 and C807. Transistors Q709, Q707 and Q708 provide current measurement of the kinescope beams for the automatic white balance circuit.

Audio processing path

The TV can be equipped with two types of sound processors: MSP3400 and MSP3410. Their main difference is that the MSP3410 can additionally decode NICAM signals ( digital standard stereo sound, used in Eastern Europe, England and France). The IC200 sound processor performs the following functions:

• demodulation of received signals;
• adjusting the volume, balance, timbre of low and high frequencies;
• automatic volume correction;
• frequency response correction using a 5-band graphic equalizer.

The pin assignment of the IC200 sound processor is shown in Table. 5.

Table 5

Output number	Designation	Purpose
1-5,8,11-17,20-23,30-34,64	NC	Not used
6	ADR-SEL	Address selection input I 2 C
7	STDBY	Standby switching signal input. Connected to +5 V power rail
9	SCL	Clock bus I 2 C
10	SDA	Address/data bus I 2 C
18	DV SUP	Power supply for the digital part of the processor. Connected to +5 V power rail
19,27,35,41, 48, 51,56	-	General
24	RESETQ	Initial reset signal input
25	HP-R	AUX right channel audio output. Comes to pay
26	HP-L	AUX left channel audio output. Comes to pay
28	SP-R	Right channel main output
29	SP-L	Main left channel output
36	SC1 OUT R	Right channel output. Comes to the SCART connector
37	SC1 OUT L	Left channel output. Comes to the SCART connector
38	CAPL-A	Volume adjustment path capacitor (AUX channel)
39	AHVSUP	+8 V analog supply
40	CAPL-M	Volume path capacitor (main channel)
42	AGNDC	Reference voltage of the analog part
46,47	SC3 IN	Signal input for SCART3 connector. Not used
49, 50	SC2 IN	Signal input for SCART2 connector. Not used
52,53	SC1IN	Signal input for SCART connector
54	V REF TOP	Reference voltage of analog-to-digital converter
55	MONO IN	Mono signal input. Comes from AM tuner output
57	AV SUP	Power supply for the analog part of the processor. Connected to +5 V power rail
58	ANA IN 1+	Audio signal input
59	ANA IN-	General signal sound accompaniment
60	ANA IN 2+	Input 2 audio signals
61	TESTEN	Not used
62,63	XTAL	Conclusions for connecting a quartz resonator

The selected audio signal from the tuner TU101 (pin. QSS) through the filters Q110 and Q210 is fed to the pin. 58 differential inputs of the IC200 sound processor. The other input (pin 59) is connected to the common wire through the capacitor C217. After processing in the IC200, audio signals from the pin. 28, 29 go to the buffer stage Q204, Q205 and then to the power amplifier 1C 1200 (pin 7.11). At the same time, these same signals are fed through the CN1202 connector to the subwoofer power amplifier (K ​​board). From the output of the IC1200 amplifier (pin 2, 4), signals are fed to the dynamic heads.

To play sound through headphones, the signals are taken from the pin. 25, 26 IC200 and through the Q201, Q202 keys (provide the mute mode when the TV is turned on - POWER ON MUTE) are fed to the IC201 amplifier (pin b, 7). From the amplifier outputs (pin 1, 3) through the filters R414, L410, C425 and the CN402 connector, the signals are sent to the H board.

The POWER ON MUTE signal is generated by the Q1200 transistor and prevents audible “pops” when the TV is turned on. The MUTE signal is generated by the microprocessor IC001 (pin b) and is fed through the Q1201 transistor to the power amplifier IC1200 (pin 5) and the subwoofer amplifier.

The subwoofer amplifier is based on the IC271 (TDA2050) chip and is structurally located on the K board. The signals of the right and left channels are added to the resistor R282 and then fed to the low-pass filter on the elements C282, R282, C286. After selecting the lower frequencies, the signal is fed to the input of the amplifier (pin 1). The second input of the differential amplifier (pin 2) is connected to a common wire through an RC filter. The output signal of IC271 (pin 4) is fed to the subwoofer. Transistor Q205 shunts the input circuits when the MUTE signal is active.

Service mode

To enter the service mode, perform the following operations:

• turn on the TV to the network and switch it to standby mode;
• sequentially press the following buttons on the remote control remote control(RC): Press the following buttons on the remote control (RC) in sequence: ON screen display, 5, Volume +, TV.

TT- symbols and TV status information will be displayed in the upper right corner of the screen.

To access menu items, press the MENU button. Use the NEXT (blue) and PREVIOUS (green) buttons to select a menu item. To change the selected parameter, press the "+" (yellow) and "-" (red) buttons.

To exit the service mode, turn off the power of the TV.

The name and range of adjustments of the parameters are given in Table. 6.

Table 6

Parameter	Default value	Adjustment range
V size	21	0-63
Vbreth	32	0-63
pin amp	12	0-63
para. Tilt	43	0-63
v linear	42	0-63
Corner corr	05	0-63
H size	34	0-63
Vpos	00	0-63
H phase	42	0-63
Blue	26	0-63
Green	32	0-63
Red	42	0-63
HV blk1	00	0-63
HV blk2	00	0-6
V cent	06	0-63
Zwei max	36	0-63
Zwei min	18	0-63

Test mode

Press the TEST button twice to enter the test mode. To exit the test mode, press the 0 button twice, then TEST and TV, or switch the TV to standby mode. The list of test mode commands is given in Table. 7.

Table 7

Team	Description
00	Exit test mode
01	Set maximum contrast
02	Set minimum contrast
03	Set volume level to 35%
04	Set volume level to 50%
05	Set volume level to 65%
O6	Set volume level to 80%
07	Maximum brightness and contrast
08	Set analog controls to default values: program number - 1, volume - 35%
15	Read the factory settings (brightness, contrast, hue, volume, sharpness and color values) from the ROM of the microprocessor and write them to the non-volatile memory (NVM)
16	Save current settings as default
17	Enable/disable sharpness adjustment
19	Set priority of RGB signals
22	Additional color adjustment (different values ​​for PAL and SECAM)
23
24	Enable RGB signal priority
25	Enable D/K system
26	Enable I/U system
27	Enable I/I system"
28	Enable B/G system
32	Set contrast to 50%
36	Mute mode (MUTE)
37	Disable display of service information
38	Switch to G2 accelerating voltage setting mode
39	Additional brightness adjustment
41	Initializing Non-Volatile Memory (NVM)
43	Initialization of geometry settings
48	Set NVM test byte to 44h
49	Erase test byte
51	60/100 programs

TV settings

Accelerating voltage adjustment (G2)

• a “black field” signal is fed to the input of the TV;
• enter the service mode, then select command 38 in the test mode (see Table 7);
• the lower potentiometer on the case of the horizontal transformer (screen) ensures that the arrow on the screen is practically invisible;
• press the TV button on the remote control to save the data.

Video Peak Adjustment

• a “white square on a black background” signal is fed to the TV input;
• connect the oscilloscope to the pin. 7 kinescopes (red spotlight);
• set the maximum contrast of the image - the command "01" in the test mode (Table 7);
• in the service mode, select the RED HWB item;
• yellow and red buttons on the remote control set the signal span to 85 V.

White balance adjustment

• a “white field” signal is fed to the input of the TV;
• set the default brightness and color level;
• enter the service mode;
• Adjust the GREEN HWB and BLUE HWB settings until the white balance is achieved.

Additional color adjustment

• apply to the TV input a color bar signal in the PAL system;
• connect the oscilloscope to the pin. 3 kinescopes (blue spotlight);
• in test mode, select the command "22";
• the yellow and red buttons on the remote control achieve the shape of the oscillogram, as in fig. four:
• repeat the adjustment for the signal in the SECAM system.

Self-diagnosis

Errors detected as a result of the operation of the internal diagnostics system are fixed in two ways:

• busy bus I 2 C;
• A device is not responding on the I2C bus.

At the first moment after turning on the TV, the microprocessor tries to “free” the I 2 C bus (if the bus is not “freed”, then the light tries to establish communication with the corresponding device. If a malfunction is detected in the device, its number is indicated by the corresponding number of LED blinks. If a fatal error is detected, the TV remains in the state in which the error was detected.If other errors occur, the TV tries to continue operation.Error codes are shown in Table 8.

Table 8

Error number (number of blinks in a series of LED)	Manual error code S-188-900-10	Description	Note
Not	0	No mistakes	-
2	30	Video processor error when working with bus I 2 C
3	31	The video processor does not set the "OK" flag
4	32	Video processor error - no horizontal feedback signal	Indicated when the TV is turned on and in standby mode
	33	Video Processor Error - Stack Overflow	-
5	40	Sound processor error when working with bus I 2 C	Indicated in any operating mode, the TV switches to mute mode (MUTE)
6	91	Turns on protection mode - no personnel pulses	Indicated in any operating mode, the TV switches to standby mode
7	10	Non-volatile memory error when working with bus I 2 C
8	20	Tuner error when working with bus I 2 C	Indicated in any operating mode, the TV switches to standby mode
9	01	General bus error I 2 C - SDA1 or SCL1 lines shorted to ground	Displayed only when the TV is turned on
10	90	X-ray protection mode - the voltage at the anode of the kinescope is too high	Indicated in any operating mode, the TV switches to standby mode

Possible malfunctions and their elimination

The TV does not turn on, the mains fuse blows

Checking the health of the elements network filter(T601, S602-S606), switch S601, kinescope degaussing system, rectifier (D610, SbZO), windings 5-7 of transformer T602, S611, power transistor 1S600 (pin 1-3).

The TV does not turn on, the mains fuse is intact, the POWER indicator does not light up

Check the presence of a voltage of +300 V at the pin. 1 IC600. If there is no voltage, the serviceability of the elements of the mains filter, switch, diode bridge, windings 5-7 of the T602 transformer is checked.

Check the presence of supply voltage at the pin. 9 IC600 (chip trigger voltage: +8±0.4V). In the absence of voltage, the serviceability of resistors R604, R651, capacitor C610, transistor Q601 and zener diode Q603 is checked.

If the supply voltage is normal, check the feedback voltage at the pin. 7 (650 mV) and the voltage drop across the protection resistor R605 (no more than 1 V). Check the passage of control pulses from the pin. 5 IC600 through R607 and C614 to the base of the output transistor (pin 3). The maximum duration of the positive half-wave of control pulses: 33-41 µs, the minimum duration of the negative half-wave: 45-55 µs.

POWER indicator is on, TV does not turn on

Check the voltages generated by the PSU for compliance with the nominal values ​​​​(see the "Power supply" section). Check the passage of the STDBY signal from the pin. 3 microprocessors IC001 through transistors Q604, Q603, Q602 and optocoupler IC601 on pin. 7IC600.

Check the mode of transistors Q617, Q606, Q803 (horizontal scan overload protection circuit).

To determine the malfunction (power supply or line scan), solder R816 or L805. If the blocking of horizontal pulses is removed - a malfunction in the horizontal scan or its load: vertical scanning, video amplifier.

There is no sound and image, there is a raster

Make sure the TV is in TV signal reception mode. Check the presence of supply voltages on the tuner: +33 V, +5 V. Check the I 2 C bus signals at the tuner's SCL and SDA outputs.

Check the video signal path: pin. VIDEO tuner - transistors Q411, Q410 - buffer Q107 - switch Q310, Q311 - pin. 40 video processor IC301.

No sound

Check the correct settings of the TV reception system (for Russia - SECAM D / K).

Check the presence of supply voltages at the outputs of the IC200 sound processor - pin. 7.18, 57 (+5 V), pin. 39 (+8 V). Check the presence of supply voltages on the amplifier IC1200 - pin. 1, b (-18 V), pin. 3 (+18 V).

Check the absence of the MUTE signal on the pin. 5 amplifier IC1200 (high level corresponds to mute mode). Check the audio signal path: AM tuner output - input 55 IC200 - pin. QSS tuner - filter Q110, Q210 - pin. 58 IC200 - pin. 28, 29 IC200 - buffer Q204, Q2O5 - pin. 7.11 IC1200 - pin. 2, 4 IC1200 - loudspeakers.

No sound on headphones

Check the supply voltage +8 V at the pin. 2 amplifiers IC201. Check the signal path to the headphones: pin. 25, 26 sound processor IC200 - Q201, Q202 - pin. 6, 7 amplifier IC201 - pin. 1, 3 amplifiers IC201 - filter L410, L411 - connector CN402 (pin 7.9) - headphone jack.

The TV does not respond to pressing the control buttons on the front panel

Check resistors R060, R073, R061, R071, R074, R063, R062 for compliance with the rating. Check the passage of the signal from the pin. 40 microprocessor IC001: transistors Q007, Q008, Q009 - input 32 of the microprocessor. Check diodes Q013, Q017 and inductance L003 for an open circuit.

The TV does not respond to commands from the remote control

Make sure that the remote control and its power source (batteries) are in good condition.

Check the presence of voltage +5 V STDBY on the pin. 2 photodetectors IC003. Check the signal flow circuit from the photodetector: pin. 1 IC003 - R015 - R058 - pin. 36 IC001.

Poor color saturation

Check that the saturation control setting is correct. Check the chain of passage of color-difference signals through the delay line IC302.

Teletext and service information not displayed

Check the presence of a control signal on the pin. 21 IC301 video processors. Check the chain of passage of RGB signals from the microprocessor to the video processor. For example, for the red channel, the signal flow chain is as follows: pin. 47 IC001 - Q012 - R088 - D005 - C317 - pin. 24 IC301. In the absence of signals at the outputs of the microprocessor, it is replaced. If there are signals at the input of the video processor, it is replaced.

One of the primary colors predominates on the screen or it is absent

They check the signal path of the corresponding color (for example, for red: pin 17 of IC301 - pin 4 of the CN081 connector - Q702, Q705, Q708 - pin 7 of the kinescope. Check the supply voltages of +5 and +190 V on the corresponding video amplifier of the kinescope board.

Small image size vertically

Check the supply voltage +24 V at the pin. 2 IC501. Check serviceability external elements reverse generator - D501 and C504. Check the capacitance of the capacitor C505. Check the circuit for the passage of current through the personnel coils: pin. 5 microcircuits IC501, L501, cont. b, personnel coils, cont. 5, C505, R507, housing. If the failed element is not found, replace the IC501 chip.

Small image size horizontally

The serviceability of capacitors C801, C802, C813, C815, C809, C810 is checked by the replacement method.

Attention!Horizontal scan elements may be under high voltage!

Linearity broken horizontally

Check the health of the elements L808, L800, C803, C800, R800, L803, L806.

No sound when working with LF input

Check the sound signal path (for example, for the left channel):

• AUDIO connector - cont. 1 connector CN402 - C420 -R421 - pin. 49 IC200 sound processors;
• SCART connector - L408 - C403 - R403 - pin. 52 C200.

No picture when working with LF input

Check the video signal path:

• VIDEO connector - cont. b connector CN402 - C416 -R417 - input b switch IC401 - output 4 switch - C347 - R311 - pin. 2 video processors IC301. They also check the control signal on the IC401 switch (pin 7);
• SCART connector J401 - C417 - R344 - pin. 8 switch IC401 - pin. 4 switches - С347 - R311 -vyv. 2 video processors IC301. They also check the control signal on the IC401 switch (pin 7);
• connector J902 - cont. 4 connectors CN402 - C332 -Q310 - pin. 40 video processor IC301.

The Nissan Qashqai has become a landmark car for the market: having bought a nice compact, for the first time many of us got the opportunity to sit high and look far at the price of a regular golf class. Qashqai was bought into the family, given to wives, tinted and equipped with an all-burning "xenon" - a "jeep", albeit a small one. He was even nicknamed the vulgar word "porridge", like a beloved pet. It appeared at the right time - then, in 2007, the market was not saturated with small crossovers, and the Skoda Yeti and Mitsubishi ASX existed only as sketches of designers. Now everything is different: the second-generation Qashqai is forced to fight twice as large an army of serious opponents, so Nissan has no right to make a mistake.

A rare manufacturer deviates from the standard strategy of fighting for a modern customer: more attractive design and more gadgets on board - that's the whole secret of success in the segment. Qashqai looks great, but at the same time it has completely lost its originality and is now confusingly similar to the senior X-Trail. The new generation, of course, and until it hits the market, the Qashqai will still stand out on the road. By the way, they created the design and designed the filling in Nissan's European development centers. One of the "chips" of the new generation Qashqai has become a fully LED head optics. We had a chance to test it out in the dark, and we have to admit that the Qashqai's light is amazing with this option.

Inside, unification is still more obvious - Qashqai and X-Trail received exactly the same front panels. But this solution is not new: a similar approach can be seen from another Japanese manufacturer - Subaru - with the XV/Impreza and Forester models. The interior is cozy (there is even a trendy “ambient” lighting in warm amber), and there is enough space both in front and behind. Including in height - an additional centimeter of space appeared above the passengers' heads. However, there are small questions about the build quality - in some places on the test machines, plastic panels staggered and creaked, and the gaps were too big in places.

Sitting in the front seats is a pleasure, and the tight side support rollers hug in corners and are unobtrusive on straight lines. By the way, for some reason the armrest is made monolithic, without the possibility of moving it forward. But underneath it is special channel for the wire stretching from the usb connector located there. Trunk volume has increased by 20 liters, and now this value is 430, and the floor can be installed at two different levels.

Another trend in today's automotive industry is that bodies are getting bigger and engines are getting smaller. The Qashqai is a great example of this: the new car is 47mm longer, 20mm wider and 15mm lower, but the smallest engine is downsized from 1.6 to 1.2 liters. The Renault-Nissan Alliance has developed a new all-in-one platform called CMF and the Qashqai is the first product to use this bogie. The Europeans were given a quartet of fresh turbo engines (two diesels and two petrols), but only half of this engine range will be available in Russia, and even then as a fashionable support group for the good old two-liter aspirated from the previous generation.

At the presentation, I managed to ride just on those machines that will be sold with us. Let's start with a small-capacity gasoline - 1.2 liters of volume, combined with supercharging, provide good performance on paper: the engine produces 115 horsepower and 190 Nm of torque. But if you look at the same paper a little lower, we will see that such a car picks up a hundred in a calm 10.9 seconds, and rests on a natural speed limiter at a speed of 185 km / h. In fact, when driving a version with a 1.2 DIG-T engine, you are unlikely to remember that a turbine is spinning under the hood - the nature of the thrust is so smooth that the engine is more like an aspirated liter of commercials 1.6. Peak acceleration is not impressive, and for a dynamic ride you need to actively work with a 6-speed manual with too long backstage throws. But the clutch pedal settings for this transmission, on the contrary, are very pleasant.

Another gasoline engine is addressed to Russian retrogrades - an atmospheric two-liter engine with a capacity of 140 horsepower. Here, there is more power (the torque is almost the same), and any gasoline will digest, and it will be faster and easier to repair in which case. As in the previous generation, a variator is aggregated with this motor, which does not promise anything revolutionary, but successfully provides smooth and comfortable driving for the driver. In terms of extreme dynamic capabilities, a two-liter engine is quite comparable to a newfangled “turbo”, so the choice will depend on the price and available aggregate combinations. Other things being equal, the small-capacity has the advantage of lower fuel consumption, and the two-liter unit is preferable for those who prefer proven solutions.

In Europe, instead of the "Russian" two-liter aspirated, Qashqai is given a 150-horsepower turbocharged 1.6. with 240 Nm of torque. The Europeans will also have a second, junior diesel engine: a one and a half liter unit produces 110 hp, but another value is much more interesting: the level of CO2 emissions is only 99 grams per kilometer. However, we will smoke into the atmosphere with a more voracious diesel engine

For fans of diesel engines, the Russian office of Nissan is ready to offer a version with a 1.6-liter engine that produces 130 horsepower. This modification is especially interesting given the fact that a new Nissan variator is being installed on it. This is not the same node used on the two-liter version, and this becomes immediately noticeable in motion. It is no different from a regular CVT during a smooth ride, but once you push it, the "gearbox" turns into a traditional gearbox, changing virtual steps to create a feeling of more dynamics. All manufacturers unanimously say that, according to their research, the very jerks that they are used to when changing gears on conventional automatic machines are important for active drivers. Wanted - get! Nissanovtsy created a successful design that combines the smoothness of the variator and the discrete acceleration of the machine.

The engine itself is also good: the diesel pulls confidently, but is moderately noisy. But for optimal traction control on a diesel-variator combination, it takes some time to study the habits of the power plant. Once you understand when the CVT goes into dynamic mode, you will no longer consider the transmission to be too twitchy, as it happened to me at first. But I liked the steering more on the gasoline versions - the “steering wheel” of the diesel car feels overweight, although the chassis responds adequately to the steering wheel turns on all tested modifications. Qashqai is controlled reliably and simply, and more of it target audience and not required.

But smoothness is required, with which the new generation of the crossover has some problems. Even on smooth Spanish tracks, it is noticeable that the chassis loves good coverage, and small bumps are a big problem for it. In the parking lot, I seem to find the culprit - these are foppish 19-inch wheels with low-profile tires mounted on a car with a turbocharged 1.2 DIG-T engine! I am changing the car to a two-liter one adapted to Russia with 17-inch wheels and a large tire profile, but the situation is not changing radically. Now it no longer shakes on the cigarette butts thrown by the careless Spaniards, but the pits and joints are still felt more than we would like. And although the chassis uses two-piston shock absorbers, designed to separately filter the high-frequency vibrations of smooth roads and the low-frequency movements of broken ones, they are tuned in a European way (remember where and for whom the crossover was created), so the smoothness of the ride on Russian roads requires additional on-site verification.

The radical difference between the new Qashqai and the old one is the increased manufacturability at times. The new platform provides for the implantation of the mass modern systems safety and driver assistance. Just one question: why doesn't it provide for more than one automatic window lifter? But back to less prosaic things - Qashqai can be equipped with driver fatigue control systems, blind spot and lane control, traffic sign recognition, moving object recognition, frontal collision prevention, automatic switching low and high beams, all-round cameras, as well as a multimedia complex with advanced integration with a smartphone and an advanced traction and brake control program to improve handling.

So why should you still want a new Qashqai when there are so many alternatives around now? First, it looks great on the outside and is really comfortable on the inside. Secondly, Nissan promises reasonable prices(which has always distinguished this crossover), which will become known in April. And thirdly, having received a lot of innovations in terms of technology and a radical change in design, Qashqai has remained itself - freshly reliable in motion, convenient to use and recognizable on the road. Are all the changes in the second generation Qashqai enough to beat all the competition again? To answer this question, let's wait for prices, and then we'll see what the market says.

Hello dear car enthusiasts!
On January 23 of this year, I took my new friend from the salon - Nissan qashqai. The car was purchased for a long time, it was paid back in December, but it was driving to me for more than a month. But I was initially warned and I was regularly informed about the situation by the employees of U Service + on the Simferopol highway. The situation on the market, as you know, was not easy, and I have no complaints about the delivery. The issuance of a car was also problem-free, and quite festive.
But the problems started a little later - on January 25, having driven a car for a total of about 300 km, carelessly calmly rolling along the Moscow Ring Road - it appeared on a beautiful color display on the dashboard - “ALARM! ERROR: chassis settings".
An unpleasant phenomenon when you gave so much money for a car and just started getting high from it.
Stopped, got out of the car - committed visual inspection, the wheels are in place, respectively, what else could I see, then, I began to listen on the go and, like a real master, look for, invent sensations, signs of breakdown - I did not reveal.
Of course, I, using the wonderfully executed function of controlling the phone through the “blue tooth”, dialed my car dealership. They listened to me and explained that such errors had not yet occurred, and that there was no so-called “diagnostician” on the Simferopol highway, but there was one at Service + on Kolomenskaya, where I was offered to follow. To the question:
- Is it possible for me to drive a car with such an error?
I was answered
- See how it feels! If he behaves normally - you can ride!)
I have been familiar with my car for two days already, but, unfortunately, I still had no idea what kind of behavior is normal for him.
Realizing that I would not receive any practical practical advice over the phone, I dialed "At Service +" on Kolomenskaya and signed up for diagnostics on January 29th.
Arriving on Thursday almost at the opening of a very beautiful and respectable salon "At Service +" on Kolomenskaya, I explained the essence of my trouble and gave the car for the whole day, in the hope that the guys would figure it out and went to work. Closer to dinner, my "Master" - Sergey, called me, and once again clarified the circumstances of the appearance of the ill-fated error notification. I repeated the meager facts already learned.
Then, after a couple of hours, another conversation took place with Sergey, during which I was told that they removed the error and checked everything there, and checked some sensors. I won’t lie - the device of a car, especially a modern one, is a dark matter for me, but if I explain it normally, I delve into it quickly. Here, I didn’t really understand anything, they explained to me about a possible accidental impact from the outside on the sensor ... In general, I concluded that the goal was to make the sensor not give an error, and not find a problem or malfunction.
To my question, what if I pick it up today and repeat again? I was answered
- Well, then we'll know that it's not an accident!
I smiled, the guys had more than enough confidence in their actions!
In the evening, while I was heading home through traffic jams, the error reappeared in its place ...
My call to Sergey took place immediately
- Come in the morning, we will continue to understand, Sergey told me ...
Considering that in addition to guessing the mistakes of a new car, I still have a lot of responsibilities, I could only come on Sunday morning.
On Sunday morning I was met by "master" Alexander!
During the dialogue, he said that he had read about what happened to my car. This made me terribly happy, although I expected that the "masters" communicate with each other and they, doing such a great common cause, in the face of fierce competition, are still one close-knit team.
I asked how much they would torture my car approximately.
I was told that I can safely go home, and here I can figure it out for a day, plus I still have to make a request to nissan. It remains a mystery to me why REQUEST In nissan could not be done on Thursday?!?!
So, I'm waiting, they promised to dial at 11:00, in two hours.
At 13:20 I dialed myself.
- We just finished and wanted to call you to get approval. We need to check the results of our work, but there is not enough gasoline in the tank. We will fill the car, and then you will give us the money?)
The situation amused me very much, soon, apparently, I will have to travel with my tool for diagnostics under warranty ...
Of course, I agreed, but I immediately realized that if I hadn’t dialed, she would have stood there without any action.
However, the level of loyalty to customers in "U Service +" is simply off scale!!!

In the afternoon of the same day, at 3 o'clock in the afternoon, I again disturbed the employees of the salon on Kolomenskaya. Apparently no one expected my return that day.
The tank was still almost empty, they told me that they drove 3 collometers.
The master explained something to me for a long time, but I did not understand anything, perhaps through my own fault, but his uncertainty was evident. From what was explained to me:
- That the error is floating and it is very difficult to identify it, although it seemed to me that there are some standard responses to errors that occur, for further troubleshooting ...?
- That I rush them to conclusions and they need more time, although it seemed to me that two days was enough, and besides, by my arrival no one was engaged in it and no one went ...
- I was asked to fill up the car and leave it for the guys to drive and find out the error, and when buying, I have to be prepared for the time and money spent on gasoline for such tests. However, they refused to give me a document confirming the transfer of my car, and (or) a document confirming my appeal to the salon, citing the fact that I did not pay anything, and therefore there is nothing to give me. I did not give the car without documents confirming the transfer to people whom I see for the first time in my life, and refuel the car so that they ride under the guarantee and look for an error (indefinite time). The only thing I managed to get was a copy of the car inspection card that is filled out before delivery. The first such document, which was filled out on Thursday, was not given to me, they said that it had already been taken to a warehouse ...
- I decided to devote this day to the problem to the end, and I offered the diagnostician to ride with me to identify the error of 30 kilometers. I was refused for lack of time by the employee. Went alone, rode around. The error arose after 52 km, when leaving the Moscow Ring Road !, I did not do any special manipulations and I had nothing to report something new on the problem.
- They said that the car is in good working order, but to my question, do they give me a guarantee that the car will not fail if I continue to operate with this error, and whether they will blame me for the subsequent serious damage due to ignoring this ALARM, I was told that even the manufacturer would not give me such a guarantee ...
In the evening, closer to 21 o'clock, the master called me and asked about the situation. I described to him the results of my experiments. I was told that some statistics were being compiled and as soon as a decision appeared, they would contact me.
What to do next - I have not decided yet, if someone has come across - I will be glad for any advice. Thank you.

Last edited by a moderator: Feb 2, 2015

Hello!
I drove 12,000 km. Over the past month, I encountered this error three or four times, only when the error appeared, the engine speed dropped sharply. I looked at the warnings on the on-board computer - there was nothing. once I went to the diagnostics, right before the race, the indicator went out. I drove anyway, they said that there was a little water in the throttle block. The valves were a little water (gasoline quality). the winding is gone. They can’t determine in the service, they say the onboard computer itself is reprogrammed after one-time errors and cannot read them, it shows completely serviceable systems.
To be honest, I am inclined to think that this is still the quality of gasoline (this was the case on previous cars), and, as they say, turbo engines are very demanding on its quality. I will try to refuel at Lukoil.

Last edit: 4 Feb 2015

4 Feb 2015

The first thing you should have felt is whether the ABS and ESP are working, if not, then most likely our admin is right, this is the ABS sensor. But in principle, you should not bother yourself with this) There are two solutions:
1. Take a lawyer and go to this dealer, draw up all the paperwork, and leave the car for repairs, of course, in return they should give a replacement car if it's for a long time.
2. Really go to another dealer)))

By the way, your error is lit YELLOW (which means it is considered not critical), which means that you can continue to operate) Most likely, the ABS and ESP will not work (but keep in mind that you can drive without them in winter if the experience is not long , heavy). The car cannot be used if the RED warning is on (this is a critical malfunction in which the car cannot be operated further, as this may lead to the complete failure of a certain unit or unit)!

P.S.: I also think that the ABS sensor or the connection of this sensor is faulty, and it also happens that metal chips or dirt sticks to the sensor, and it does not work well ... It’s hard to believe in something more serious, but it can’t be ruled out either.

Hello!
Should the indicators on the panel be lit in case of a malfunction of the systems indicated by you?
Thanks for the flower tip!

Chassis Electrical Fault Diagnosis - General Information

A typical electrical circuit may include an electrical component, various switches, relays, motors, fuses, fuses, or circuit breakers related to that component, as well as wiring and electrical connectors that connect the component to the battery and chassis ground. To facilitate the task of troubleshooting electrical circuits in Section Wiring diagrams - general information.

Before troubleshooting any of the electrical circuits, carefully study the relevant application diagram in order to understand its functionality as clearly as possible. Narrowing the troubleshooting circle is usually done by gradually identifying and eliminating normally functioning components of the same circuit. With the simultaneous failure of several components or circuits at once, the most probable cause failure is a blown fuse or a ground fault (different circuits in many cases can be closed to the same fuse or ground terminal).

Electrical equipment failures are often due to the simplest causes, such as terminal corrosion, fuse failure, fusible link burnout, or a defective switching relay. Perform a visual inspection of the condition of all fuses, wiring, and electrical connectors in the circuit before proceeding with specific verification the health of its components.

If using diagnostic tools for troubleshooting, plan carefully according to the attached electrical diagrams at which points of the circuit and in what sequence the device should be connected in order to most effectively detect a defect.

The main diagnostic tools include an electrical circuit tester or voltmeter (a 12 V test lamp with a set of connecting wires can also be used), a continuity indicator for a segment of the circuit (probe), including a light bulb, its own power source and a set of connecting wires. In addition, you should always have in the car a set of wires for starting the engine from an auxiliary source, equipped with alligator clips and, preferably, a circuit breaker, which can be used to bypass and connect various electrical components during the circuit diagnostics. As mentioned above, before proceeding to check the circuit using diagnostic equipment, determine from the diagrams the place of its connection.

Checking for voltage

Voltage checks are made in the event of a malfunction of the circuit. Connect one of the circuit tester leads to either the negative battery post or a well grounded point on the vehicle's chassis. Connect the other tester lead to the circuit's electrical connector terminal, preferably the one closest to the battery or fuse. If the control lamp on the tester lights up, there is voltage on this section of the circuit, which confirms the health of the circuit between this terminal and the battery. Continuing in a similar manner, explore the rest of the outline. The detection of a lack of voltage indicates the presence of a malfunction between this point of the circuit and the last one previously checked (where voltage was present). In most cases, the cause of failure is the weakening electrical connections and violations of the quality of contacts.

Looking for a short circuit

One of the methods for searching for a short circuit is to remove the fuse and connect a probe lamp or voltmeter instead. There must be no voltage in the circuit. Pull the wiring while watching the probe lamp. If the lamp starts flashing, there is a short to ground somewhere in this harness, possibly caused by chafing of the wire insulation. A similar check can be made for each of the circuit components, including switches.

Grounding check

This test is made to determine if the component is grounded reliably. Disconnect the battery and connect one of the wires of the equipped autonomous source power supply of the probe lamp to a known well-grounded point. Connect the other lamp wire to the harness or terminal being tested. If the lamp lights up, the ground is OK (and vice versa).

Conductivity Tests

The test is carried out in order to detect breaks in the electrical circuit. After turning off the power to the circuit, check it with a probe lamp equipped with an independent battery. Connect the probe wires to both ends of the loop (or to the "power" end (+) and a well-grounded point on the chassis), if the test lamp comes on, there is no open in the loop. Failure to turn on the lamp indicates a violation of the continuity of the circuit. In the same way, you can check the health of the switch by connecting a probe to its terminals. When the switch is turned to the “On” position, the test lamp should light up.

Cliff localization

When diagnosing a suspect for a broken circuit, visually detecting the cause of a malfunction turns out to be quite difficult, since inspecting the terminals for corrosion or a violation of the quality of their contacts is difficult due to limited access to them (usually the terminals are closed by the connector housing). A sharp twitch of the connector housing on the sensor or its wiring harness in many cases leads to the restoration of conductivity. Do not forget about this when trying to localize the cause of the suspect's failure to break the circuit. Intermittent failures can be caused by terminal oxidation or poor contact quality.

Diagnosing faults in electrical circuits is not at all an intractable task, provided it is clear that the current flows to all electrical loads (lamp, electric motor, etc.) from the battery through wires through switches, relays, fuses, fuses, and then returns to the battery through the mass of the car. Any problems associated with the failure of electrical equipment can only be caused by the interruption of the supply to them electric current from the battery or return it to it.

The PHILIPS L01.1E AA television chassis has already been reviewed on the pages of our magazine (see Repair & Service, No. 10, 2004). In continuation of the topic, we suggest getting acquainted with the service mode of this chassis and mastering its hardware and software adjustments.

TVs assembled on the L01.1E AA chassis can be switched to the following service modes:

default service leveling mode (SDAM);

client service mode (CSM).

The SDAM service mode serves the following purposes:

Creation of built-in installations of all chassis nodes for carrying out measurements and electrical settings of the chassis;

Blocking protection circuit;

Start flashing procedure LED indicator for troubleshooting;

Setting options;

Display/clear error buffer codes;

Align settings.

The CSM service mode is not used for chassis adjustments and its options are read-only.

Service mode SDAM sets the following mode of operation of the TV:

the message S is displayed at the top of the screen;

the frequency of receiving the station from the antenna input is 475.25 MHz;

SECAM L color system for France or PAL-BG for other Western European countries;

the volume is set at 25% of the maximum value, other values ​​​​of the sound and image parameters - at the level of 50%.

In SDAM mode, the following modes are blocked: sleep timer, parental lock, blue background, hotel, auto power off (when there is no IDENT video signal for 15 minutes), skip unwanted channels, auto save personal settings.

To enter the SDAM service mode on the main chassis board, jumpers 9631 and 9641 are connected to each other, then the TV is turned on with the power switch. After the image appears on the screen (Fig. 1), open the connection between jumpers 9631 and 9641.

Rice. 1. Screen image in SDAM mode

Note. Note that when jumpers 9631 and 9641 are closed, the short circuit protection on the +8V circuit is disabled.

On fig. 1 The following symbols mean:

LLLL - operating hours counter;

AAABCD X.Y - software version number;

S - SDAM service mode indication;

ERR - error buffer, which stores the last five error codes;

XXX option bytes;

CLEAR - reset the contents of the error buffer (to reset, select this line and press the cursor button right);

OPTIONS - submenu for setting option bytes;

AKB - enable (1) or disable (0) the circuit for controlling the dark current of the kinescope beams;

TUNER - tuner settings submenu;

WHITE TONE - white balance adjustment;

GEOMETRY - submenu for image geometry adjustment;

AUDIO - submenu for adjusting audio parameters.

To navigate in the SDAM service menu, use the cursor buttons on the remote control up/down. The selected line becomes brighter. Activation of the selected submenu (setting values) occurs when you press the cursor buttons on the remote control left/right.

If you press the MENU button in SDAM mode, you can go to the user menu (normal menu for parameter settings). To return to SDAM mode, press the OSD/STATUS button on the remote control. To return from the submenu to the previous menu, press the MENU button on the remote control.

To save the SDAM service mode settings, press the STANDBY button on the remote control.

Consider the hardware and software adjustments of the L01.1E AA chassis.

Chassis hardware adjustments L01.1E AA

Adjustment of the accelerating voltage Vg2

1. Activate the SDAM service mode and select the WHITE TONE submenu in it.

2. Set the NORMAL RED, GREEN and BLUE values ​​to 40.

3. Use the MENU button to return to the user menu and set the minimum contrast and brightness (so that the OSD image is barely visible).

4. Return to SDAM mode using the MENU button.

5. Connect the test signal generator to the antenna input of the TV and give a signal "black field". To control the adjustment, an oscilloscope (1:10, 0.2 ms / div) is connected to one of the kinescope cathodes.

6. variable resistor Screen (lower on TDKS) set a constant voltage from zero to the quenching level (horizontal area of ​​the line quenching pulse), equal to 160 ± 4 V.

Focus voltage adjustment

1. Connect the test signal generator to the antenna input of the TV and give the signal grid.

2. Use the SMART PICTURE button on the remote control to select the NATURAL or MOVIES picture mode.

3. Variable resistor Focus (upper on TDKS) achieve optimal focusing over the entire screen area.

Chassis software adjustments L01.1E AA

These adjustments are made in the SDAM service mode. These include:

Setting option bytes (OPTIONS submenu);

Tuner adjustment (TUNER submenu);

White balance adjustment (WHITE TONE submenu);

Geometry adjustment (GEOMETRY submenu);

Adjustment sound path(AUDIO submenu).

Setting option bytes

Enter the SDAM service mode and select and activate the OPTIONS line in it. An image should appear on the screen (Fig. 2).

Rice. 2. Screen image in option bytes mode

There are seven option bytes OP1-OP7 in total. Setting the values ​​of these bytes allows you to customize the configuration specific model? tuner type, region, sound processor modes, possible systems broadcasts, SMART PICTURE and SMART SOUND presets, stereo/mono modes, etc. In table. 1 shows the fixed values ​​​​of the option bytes for various TV models. The required values ​​of the option bytes are set using the cursor buttons right/left on the remote control. The new values ​​are memorized after exiting to the previous menu.

Table 1 Fixed Option Byte Values ​​for Specific Models

Model	OP1	OP2	OPS	OP4	OPS	OP6	OP7
21PT6807/01 DVD	216	247	249	184	208	54	3
21PT6807/05 DVD	220	247	249	184	208	54	3
21PT6807/58 DVD	216	247	249	184	208	54	0
24PW6817/01 DVD	216	247	253	184	208	54	3
24PW6817/05 DVD	220	247	253	184	208	54	3

Tuner adjustment

This adjustment is performed only after replacing the tuner or the 7602 non-volatile memory chip. In the SDAM service mode, the TUNER line is activated. A submenu appears on the screen, consisting of two parameters - IF PLL and AGC.

The first parameter is configured automatically.

To adjust the AGC parameter, a test signal “color bars” with a frequency of 475.25 MHz and a swing of 10 mV is fed to the antenna input of the TV. To control the adjustment to the output. 1 tuner 1000 connect digital voltmeter. Then adjust the value of the AGC parameter (factory value - 28), achieving voltmeter readings in the range of 2.33.8 V. To save the new value, return to the main menu using the MENU button and then switch the TV to standby mode.

White balance adjustment

In the WHITE TONE submenu, the cutoff points of the kinescope cathodes can be adjusted. It has adjustments for NORMAL RED, NORMAL GREEN and NORMAL BLUE. The factory settings are 40 (corresponding to a color temperature of 9600 K).

Geometry adjustment

To adjust the image geometry, a test signal "grid field" in the PAL / SECAM color system with a frequency of 475.25 MHz and a swing of 1 mV is fed to the antenna input of the TV. Set the image mode to NATURAL, enter the SDAM service mode and activate the GEOMETRY line in it. The parameters available in this submenu and their default values ​​are shown in Table 1. 2.

Table 2. GEOMETRY submenu parameter values

Options	Description	21PT6807/01 DVD	21 PT6807/05 DVD	21PT6807/58DVD	24PW6817/01 DVD	24PW681 7/05 DVD
HP	Parallelogram horizontally	31	31	31	32	32
HB	Parallelism of vertical lines	31	31	31	32	32
HSH	Horizontal shift	38	38	38	27	27
EWW	Horizontal size	40	40	40	36	36
EWP	Parabola horizontal	06	06	06	20	20
UCP	Distortion in upper corners screen	35	35	35	20	20
LCP	Distortion in the lower corners of the screen	35	35	35	25	25
EWT	Trapezoid horizontally	35	35	35	28	28
VSL	Aligning the image and screen centers vertically	36	36	36	37	37
VAM	Vertical size	63	63	63	30	30
VSC	Vertical Linearity	23	23	23	20	20
VSH	Vertical shift	31	31	31	31	31
VX	Vertical zoom	25	25	25	25	25
H60	Horizontal shift for 60 Hz	09	09	09	09	09
V60	Vertical dimension for 60 Hz	64	64	64	64	64

Sound path adjustment

There are two parameters available for adjustment in the AUDIO submenu:

AF-M - sound quality setting, default value is 300;

A2T - A2 standard decoder threshold setting, default value is 25.