JVC AV-T2122 Service Manual Download Page 21

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No.51866

AV-T2122

SELF CHECK FUNCTIONS

1. Outline

This model includes protector functions for Over-current, X-ray and CRT NECK which cutoff the sub-power in the event of a malfunction and

inform of the malfunction by flashing POWER/ON TIMER LED.

The malfunction is detected according to the state of the control line input connected to the main CPU.

2. Self

check

items

Check item

Detected contents

Detection method

Abnormality state

Over-current protector

Operation

over-current

protection circuit

The main CPU detects at

1second intervals.

If NG is detected for more than

1ms, a malfunction is interpreted

During an abnormality the sub-

power is cutoff. The remote

controller power key operation is

not recognized and sub-power

off is maintained until the power

cord is unplugged and

reinserted.

X-ray

protector

Operation of X-ray protection

circuit

The main CPU detects at

1second intervals.

If NG is detected for more than

1ms, a malfunction is interpreted

During an abnormality the sub-

power is cutoff. The remote

controller power key operation is

not recognized and sub-power

off is maintained until the power

cord is unplugged and

reinserted.

CRT

NECK

protector

When the vertical circuit S-

correction capacitor C413 is

shorted, detect the potential

drop of the C413, and prevent

the burn damage to the CRT

NECK.

The main CPU detects at

1second intervals.

If NG is detected for more than

1ms, a malfunction is interpreted

During an abnormality the sub-

power is cutoff. The remote

controller power key operation is

not recognized and sub-power

off is maintained until the power

cord is unplugged and

reinserted.

3. Self check indicating function

The self check function begins detection about 5

seconds after power is supplied.

In the event a malfunction is detected, the sub-power is

cutoff immediately.

At this time, the POWER/ON TIMER LED flashes to

inform of the malfunction.

Item

LED flashing intervals

Priority of detection

OCP/X-ray

Red and green LED flash alternately at

0.5 second intervals

NECK

Red and green LED flash alternately at

1.0 second intervals

About 5 seconds
after

Malfuction is
detected

Detection

start

SUB-POWER OFF

Flashing
POWER /
ON TIMER LED

POWER
supplied

Summary of Contents for AV-T2122

Page 1: ... Sept 2001 AV T2122 AR CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 FEATURES 4 FUNCTIONS 4 SPECIFIC SERVICE INSTRUCTIONS 6 SERVICE ADJUSTMENTS 10 PARTS LIST 29 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM APPENDIX 2 1 SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS GA2 ...

Page 2: ...items Where these differ select the setting item with the MENU UP DOWN key and adjust the setting with the MENU LEFT RIGHT keys The letters of the selected item are displayed in yellow ５ After adjusting release the MENU LEFT RIGHT key to store the setting value ６ Press the EXIT key twice to return the normal screen 5 Receive channel setting Refer to the OPERATING INSTRUCTIONS USER S GUIDE and set ...

Page 3: ... CC1 T1 PICTURE BOOSTER OFF VOLUME 10 COLOR SYSTEM AUTO TV VIDEO TV HYPER SURROUND OFF 2 Setting of MENU Setting item Setting value Setting item Setting value TINTE ESTANDAR ALTAVOCES SI COLOR ESTANDAR CHILD LOCK NO CONTRASTE ESTANDAR TEMPORIZADOR NO BRILLO ESTANDAR LISTA DE CANAIS SET OPTIONALLY DETALLE ESTANDAR AJUSTE CODIGO DE ACCESO Unnecessary to Set GRAVES CENTER PANTALLA AZUL NO AGUDOS CENT...

Page 4: ... in the list for this adjustment variable resistors transformers condensers etc 7 Presetting before adjustment Unless otherwise specified in the adjustment instructions preset the following functions with the remote control unit VIDEO STATUS ESTANDAR GRAVES AGUDOS BALANCE CENTER ADJUSTMENT EQUIPMENT 1 DC voltmeter or digital voltmeter 2 Oscilloscope 3 Signal generator Pattern generator NTSC M PAL ...

Page 5: ... FRONT HV UPPER FOCUS LOWER SCREEN U T TUNER IC101 IC704 IC701 MENU CH CH VOL VOL F901 T522 T111 3 1 GND TP E PW DEG S SW B1 B1 TP 91 CW MPX AV IN OUT 5 1 3 1 X CRT SOCKET PWB Within MAIN PWB ASS Y TP E SOLDER SIDE TOP CRT EARTH BRAIDED ASS Y E1 TP 47B ...

Page 6: ...NU Press the DISPLAY key and VIDEO STATUS key of the remote control unit at the same time to enter the SERVICE MENU screen shown in figure page later 2 SERVICE MENU screen selection Press the UP DOWN key of the MENU to select any of the following items The letters of the selected items are displayed in yellow PICTURE SOUND VIDEO STATUS OTHERS LOW LIGHT HIGH LIGHT RF AFC CHK VCO CW I2 C BUS CTRL 3 ...

Page 7: ...C BUS CTRL EXIT EXIT BY EXIT RF AFC ON FINE SELECT BY OPERATE BY EXIT BY EXIT EXIT BY EXIT I2C BUS ON OPERATE BY EXIT BY EXIT SELECT BY EXIT BY EXIT SELECT BY OPERATE BY EXIT BY 1 NOISE STATUS EXIT CINEMA SELECT BY OPERATE BY EXIT BY TINT G DRIVE COLOR B DRIVE PICTURE R CUT BRIGHT G CUT DETAIL B CUT EXIT GAME SELECT BY OPERATE BY EXIT BY TINT G DRIVE COLOR B DRIVE PICTURE R CUT BRIGHT G CUT DETAIL...

Page 8: ...setting adjustment work press the EXIT key again The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE BALANCE page of ADJUSTMENT The setting for VCO CW are described in the IF VCO page of ADJUSTMENT SELECT BY OPERATE BY EXIT BY IT 1 NOISE STATUS EXIT SOUND MODE SELECT BY OPERATE BY EXIT BY IT EXIT 1 PICTURE PICTURE MODE INITIAL SETTING VALUE Adjust SETTING VALUE SETTING ITEM SELECT...

Page 9: ...nitial setting value No Setting item Variable range Initial setting value 1 PICTURE 0 127 65 31 C TRAP 0 1 0 2 BRIGHT 0 127 64 32 C TR FO 0 3 2 3 COL PALM 0 127 70 33 C TRAP Q 0 3 0 4 COL PALN 0 127 70 34 FIX B W 0 1 0 5 COL NTSC 0 127 80 35 APA P FO 0 3 1 6 TINT 0 127 65 36 DC TRAN 0 7 7 7 TV DTL 0 63 38 37 B ST SW 0 7 0 8 EXT PIC 25 0 38 B ST PO 0 1 0 9 EXT BRI 25 5 39 ABL GAIN 0 7 4 10 EXT COL ...

Page 10: ... 0 63 30 7 LOW SEP 0 63 22 8 HI SEP 0 63 23 9 5FH MON 0 1 0 10 SAP VCO 0 63 26 11 IN GAIN 0 1 0 12 FIL OFF 10 0 VIDEO STATUS MODE Initial setting value No Setting Adjustment item Variable range CINEMA GAME 1 TINT 20 0 0 2 COLOR 20 3 3 3 PICTURE 20 10 10 4 BRIGHT 20 0 0 5 DETAIL 15 0 5 6 G DRIVE 99 50 22 0 7 B DRIVE 99 50 54 0 8 R CUT 10 0 0 9 G CUT 10 0 0 10 B CUT 10 0 0 ...

Page 11: ...l setting value R CUTOFF 0 255 20 G CUTOFF 0 255 20 B CUTOFF 0 255 20 HIGH LIGHT MODE Setting Adjustment item Variable range Initial setting value G DRIVE 0 255 128 B DRIVE 0 255 128 RF AFC CHECK MODE Setting Adjustment item Variable range Initial setting value RF AFC ON OFF ON FINE 77 77 I2 C BUS CTRL MODE Setting Adjustment item Variable range Initial setting value I2 C BUS ON OFF Fixed ON DO NO...

Page 12: ...SYNC YES being shown on the screen Then adjust CW TRANSF until BELOW REFERENCE mark turns yellow and confirm again SYNC YES being shown on the screen RF AGC ADJUSTMENT RF AGC adjustment No 60 RF AGC 1 Receive a broadcast 2 Select No 60 RF AGC of the PICTURE mode in SERVICE MENU 3 Press the MUTE key and turn off color 4 With the MENU LEFT key get noise in the screen picture 0 side of setting value ...

Page 13: ...R50 No 53 V LIN 50 50Hz 1 Receive a crosshatch signal PAL N 2 Confirm the initial setting value of the No 50 V POS 50 No 51 V SIZE 50 No 52 V S CR 50 and No 53 V LIN 50 3 Adjust the vertical screen size to 92 with the PICTURE MODE No 51 V SIZE50 4 Adjust the PICTURE MODE No 53 V LIN 50 and No 52 V S CR50 to get the best vertical linearity 5 Adjust the PICTURE MODE No 50 V POS 50 so that the vertic...

Page 14: ... left until either one of the red blue or green colors appears faintly 7 Adjust the two colors which did not appear until the single horizontal line that is displayed becomes white using the to keys of the remote control unit 8 Turn the screen VR until the single horizontal line is displayed faintly 9 Press the key to return to the regular screen WHITE BALANCE High Light adjustment Signal generato...

Page 15: ...ignal 2 Select No 3 COL PALM of the PICTURE mode in SERVICE MENU 3 Confirm the initial setting value of the No 3 COL PALM 4 If the color is not the best with the initial setting value make fine adjustment until you get the best color PAL N 1 Receive a PAL N color bar signal 2 Select No 4 COL PALN of the PICTURE mode in SERVICE MENU 3 Confirm the initial setting value of the No 4 COL PALN 4 If the ...

Page 16: ...kHz 0 1kHz 7 Select the No 3 FH MON of the SOUND mode and reset the setting value from 1 to 0 SAP VCO adjustment Signal generator Frequency counter MPX Connector 4 pin SDA 3 pin GND 2 pin TVR MAIN PWB No 9 5FH MON No 10 SAP VCO 1 Receive a NTSC RF signal non modulated sound signal from the antenna terminal 2 Connect between pin 4 of MPX connector and GND pin 3 of MPX connector through 1MΩ resistor...

Page 17: ... oscilloscope to pin 2 R OUT of MPX connector and display one cycle portion of the 300Hz signal 3 Select the No 7 LOW SEP of the SOUND mode in SERVICE MENU 4 Confirm the initial setting value of the No 7 LOW SEP 5 Adjust the No 7 LOW SEP so that the stroke element of the 300Hz signal will become minimum 6 Change the connection of the oscilloscope to pin 1 L OUT of MPX connector and enlarge the vol...

Page 18: ...he center of the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Input a crosshatch signal 11 Verify that the screen is horizontal 12 Input red and blue raster signals and make sure that purity is properly adjusted CRT WEDGE DE...

Page 19: ...ake best convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap the lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make best convergence After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the 6 magnets with g...

Page 20: ...set the resistor between X connector 1 3 3 Make sure that the screen picture disappears 4 Temporarily unplug the power cord 5 Remove the resistor between X connector 1 3 6 Again plug the power cord make sure that the normal picture is displayed on the screen B1 T522 Q942 HVT HEATER IC701 27 28 Q511 D510 4 Q941 Q522 10 4 3 IC201 H OUT T521 Q521 H Vcc R562 D561 FR561 X C561 R563 D562 3 2 1 Fig 1 RES...

Page 21: ... power is cutoff The remote controller power key operation is not recognized and sub power off is maintained until the power cord is unplugged and reinserted CRT NECK protector When the vertical circuit S correction capacitor C413 is shorted detect the potential drop of the C413 and prevent the burn damage to the CRT NECK The main CPU detects at 1second intervals If NG is detected for more than 1m...

Page 22: ...rs and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part Note After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as indicated i...

Page 23: ...capacitor MY Mylar capacitor MM Metalized mylar capacitor PP Polypropylene capacitor MPP Metalized polypropylene capacitor MF Metalized film capacitor TF Thin film capacitor BP Bipolar electrolytic capacitor TAN Tantalum capacitor 3 Coils No unit µH Others As specified 4 Power Supply B1 B2 12V 9V 5V Respective voltage values are indicated 5 Test point Test point Only test point display 6 Connectin...

Page 24: ...AM 2 5 MAIN PWB CRT SOCKET PWB CIRCUIT DIAGRAM 2 7 PATTERN DIAGRAMS MAIN PWB PATTERN 2 9 CRT PWB PATTERN Within MAIN PWB 2 11 SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW FRONT VIEW TOP VIEW CHIP TR IC BOTTOM VIEW FRONT VIEW TOP VIEW CHIP IC TOP VIEW 1 N N 1 OUT E IN IN OUT E 1 N N 1 N N N 1 N C B E 5 TOP CRT SOCKET PWB PATTERN Within MAIN PWB ...

Page 25: ...EMOCON Q201 Q202 BUFFER CF131 TRAP IC101 IF SF101 SAW F Q101 AMP IF1 IC703 KEY R G B OUT C V IN V OUT FM OUT SP R IC601 AUDIO AMP R L L R IN OUT IC251 VIDEO SW R L AV INPUT AV OUT PUT IC651 MTS TONE VOL CONT R L OUT R2 L2 IN V1 V TV YS R G B ANT INPUT MAIN PWB REMOCON RECEIVER KEY 1 KEY 2 V L1 R1 IN R1 L1 R OUT L OUT AV INPUT R2 V2 L2 V2 R1 V1 L1 TU001 TUNER R2 L2 ...

Page 26: ...1 8 V 1 4 1 4 V 1 4 1 4 V 2 3 2 3 V 2 6V 2 6V 0V 0V 6 1 6 1 V 4 8 4 8 V 4V 4V 3 9 3 9 V 8 9 8 9 V 2 1 2 1 V 2 1 2 1 V 3 4 3 4 V 2V 2V 8 9V 8 9V 0V 0V 2 6 2 6 V 8 8V 8 8V 3 2V 3 2V 8 8V 8 8V 3 9 3 9 V 1 6 1 6 V 2 2 2 2 V 6 4 6 4 V 3 2 3 2 V 2 3 2 3 V 0V 0V 2 2 2 2 V 4 3 4 3 V 4 3 4 3 V 0V 0V 0V 0V 0V 0V 0V 0V 9V 9V 0V 0V 6 1V 6 1V 2 5 2 5 V 2 3 2 3 V 2 3 2 3 V 0V 0V 2 1 2 1 V 2 1 2 1 V 5V 5V 2 4 2 ...

Page 27: ...3V 0 4V 9V 12 4V 152 9V 2 1V 1 6V 143 7V 2 3V 1 9V 153 6V 2V 1 6V Q522 B Q521 G Q521 D 1 2 4 90 IC401 2 3 7 4 5 50 26 1 2 T522 3 4 6 8 10 200 25 120 220 1150 100 Q351 C Q352 C Q353 C 120 110 1 5V 35 8 V 2 2 CRT SOCKET PWB Within MAIN PWB MAIN PWB SGA 1019A R2 1 2 0078 1 5KVH 43 1 2W 3 3K 1 2W QRE121J 332Y CE42535 001J1 PICTURE TUBE ...

Page 28: ...F CAP Metalized Film Capacitor MF R Metal Film Resistor MM CAP Metalized Mylar Capacitor MG R Metal Glazed Resistor MP CAP Metalized Polystyrol Capacitor MP R Metal Plate Resistor PP CAP Polypropylene Capacitor OM R Metal Oxide Film Resistor PS CAP Polystyrol Capacitor CMF R Coating Metal Film Resistor TF CAP Thin Film Capacitor UNF R Non Flammable Resistor MPP CAP Metalized Polypropylene Capacito...

Page 29: ... I9 H9 845 JJI444 K445 9H L 8 57MM JJN44 4K44M N 3 6 OP 5 8 54 Q K4 6KNR P L 6B 9 M 8 M4MQMK44 6KN L L8 R LB 8 4 5SK4456KN 8 9 89 O G S44 K44TK U3 G6 R 7 8 4 5TK445 KN 9 9 I LI 8 4 5 K44 6KN LI9 R LB T G 4S 5K4S O H S 6 S 7TK KO O H Q NHB445 K4BKHO B 6 9 I 9 54 G M KB45KN N6OO O 6 8 C MD 55 J6O44 TK445 O 96R9 C MDO 45K4M 5M G T447K645KN LI9 L 86G 5 JG 574KM44KU LI9 L 5 8 54 SK44 6KNR 96 L39 57 8 4...

Page 30: ...No 51866 AV T2122 31 EXPLODED VIEW CRT SOCKET PWB Within MAIN PWB MAIN PWB 6 2 V01 L01 T1522 2 3 4 5 6 7 1 8 10 10 13 12 11 11 14 15 16 17 9 18 ...

Page 31: ... 4 4 5 54I U 5 4 O64MUK54M GH 5Z 5 54I U 5 47 O64MUKMM5 GH MM4 5 54I U 5 4 K4S O64MUK TM GH TZ 5 54I U 5 54 O64MUK4 4 GH 4 4 5 54I U 5 5 J 95M5UK Q5E Q4 5 MI U OW X Y 01 0 2 9O O L 5 5 J 45HUK5 M GP 5 M 5I U 5 5 O64MUK7 GH 7 Z 5 54I U 5 5S O64MUK7 GH 7 Z 5 54I U 5 5Q O64MUKMM GH MMZ 5 54I U 5 M5KMM O64MUK4 4 GH 4 4 5 54I U 5 M O64MUK54 GH 54Z 5 54I U 5745 O64MUK4 4 GH 4 4 5 54I U 574 O64MUK54 GH 5...

Page 32: ... 4 Q MI U 5QM J 95M5UK54 E 54Z 5 MI U 5QM7 J 95M5UK54ME 5Z 5 MI U 5QM J 95M5UK57ME 5 7Z 5 MI U 5QMQ J 95M5UK ME Z 5 MI U OW X Y 01 0 2 9O O L 5Q M J 95M5UK TE T 5 MI U 5Q M O64MUKMM GH MMZ 5 54I U 5Q J 95M5UK57ME 5 7Z 5 MI U 5Q O64MUK54 GH 54Z 5 54I U 5Q 7 O64MUK M GH Z 5 54I U 5Q O64MUK5M GH 5MZ 5 54I U 5Q T J 95M5UK T4E T 5 MI U 5Q S O64MUK57M GH 5 7Z 5 54I U 5Q Q O64MUK57 GH 57Z 5 54I U 5Q74 O6...

Page 33: ...MM P 743 R 5 TQ J9 5NGK547V 9 6 5 P 743 G 5 SMKS J9 5NGK T7V 9 6 T P 743 G 5 S KS J9 5NGK54 V 9 6 54 P 743 G 5 Q5KQM J9 5NGK54 V 9 6 54 P 743 G 5 Q KQ BM5NRK M 6 441P 743 R 5T45 O64MUK4 4 GH 4 4 5 54I U OW X Y 01 0 2 6 6 L 5T4 O64MUK4 4 GH 4 4 5 54I U 5T4 BM5NRK54M 6 54441P 743 R 5T4 J9 56GKMMTV 9 6 MM4 P 543 G 5T4T BM5NRK54 6 4 45 P 743 R 5T4S J9 5NGK54 V 9 6 54 P 743 G 5T55 M5NUK575 6 5741P 743 ...

Page 34: ...N K O 6 O O L J57M5 BO 4 K P 9 OW X Y 01 0 2 6 O O L J57MM MO 5STSKE O 6 O O L N LA J5 45 MO M 5MR J K O 6 O O L J5 4 K47 M RK H 6 O O L J5 5 MO654 T6R J K O 6 O O L J5 75K7 M RK H 6 O O L J5T45K4M MO M 5MR J K O 6 O O L J5T4 5M 9R6K H 6 O O L J5T47 5M 9R6K H 6 O O L J5T 5 MO M 5MR J K O 6 O O L J5QM5 MO6Q 6O J K O 6 O O L J5Q 5 MO6Q LE K O 6 O O L J5Q MK MO M 5MR J K O 6 O O L J5Q 5 MO6Q Q E V5K ...

Page 35: ... 55 MK44QK 6 R H 6O9 M G M MK455K LO 86B98 8 5475 K44S6K AON L 6OOE 1 02 5 4SQQK445K L L39 4SQTK44MK L8E B6H 7 GK T K5N 9GL L A 4SQTK445K L8E B6H T 8 54 4K4456K O BLLR REMOTE CONTROL UNIT PARTS LIST RM C373 1H 01 0 2 KK M7K55 SB B6 9 E L39 3 4 1 3 2 1 7 6 5 ...

Page 36: ...AVT2122AR CK 3 4 Printed in Japan VP 0109 DP7051 VICTOR COMPANY OF JAPAN LIMITED HOME AV NETWORK BUSINESS UNIT 12 3 chome Moriya cho Kanagawa ku Yokohama Kanagawa prefecture 221 8528 Japan ...

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