manualshive.com logo in svg

JVC AV-T2912/ZAR, Service Manual

Share
Download
JVC AV-T2912/ZAR Service Manual Download Page 47

No. 51917

AV-T2922

29

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT    

1.  HIGH VOLT AGE HOLD DOWN CIRCUIT

After repairing the high voltage hold down c ircuit as shown in Fig. 1.
This circuit shall be checked to operate correctly.

2.  CHECKING  OF THE HIGH VOLTAGE HOLD DOWN  CIRCUIT

(1)  Turn the  power switch on.
(2) As s hown in Fig.2, s et the res is tor (between  X  connector  1  &  3  ).
(3)  Make sure that the screen pic ture disappears.
(4)  Temporarily unplug the power plug.
(5) Remove the resistor (between  X  connec tor  1  &  3  ).
(6)  Again plug the power plug, make sure that the normal picture is display ed on the screen.

B1

T522

Q942

HEATER

R562

D561

FR561

X

C561

R563

IC701

31

48

Q511

D510

D562

3

2

1

5

Q941

Q522

10

4

3

IC201

H-OUT

T521

Q521

H-Vcc

Fig. 1

RE SIS TOR

RE SIS TOR

RE SIS TOR

RE SIS TOR

1

4 .2k

Ω ±1

%  

1

/4 W

1

4 .2k

Ω ±1

%  

1

/4 W

1

4 .2k

Ω ±1

%  

1

/4 W

1

4 .2k

Ω ±1

%  

1

/4 W

C561

R563

3

2

1

X CONNECTOR

R562

FR561

D561

D562

Fig. 2

Summary of Contents for AV-T2912/ZAR

Page 1: ...y the items which differ from those of the AV T2922 AR service manual For details other than those described in this manual please refer to the AV T2922 AR service manual No 51917 Mar 2002 Since the picture tube was changed we have issued the SERVICE MANUAL for AV T292 ZAR Supplement Since the picture tube was changed we have issued the SERVICE MANUAL for AV T2912 ZAR Identify that the model name ...

Page 2: ...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 3: ... RM C363 1H EXPLODED VIEW PARTS LIST Ref No Part No Part Name Description V01 A68AJB82X02 PICTURE TUBE C Inc DY PC MAGNET WEDGE L01 CELD058 001J3 DEG COIL T1522 QQH0115 001 H V TRANSF Within MAIN PWB 1 LC10571 002A D FRONT CABINET 2 CHGB0015 0B BRAIDED WIRE 3 CHGB0016 0C BRAIDED WIRE SUB 6 CEBSS12D 04KJ2 SPEAKER 2 SP01 SP02 7 LC20217 004B A CONTROL KNOB 8 LC30856 002A A POWER KNOB 9 CM12985 003 VA...

Page 4: ...No 51917 AV T2922 33 EXPLODED VIEW CRT SOCKET PWB W ithin MAIN PWB MAIN PWB FRONT CONTROLPWB 11 1 L01 V01 2 6 6 7 8 9 11 10 13 2 14 15 17 16 T1522 12 3 ...

Page 5: ...0 68Ω 1W J R1415 QRE121J 102Y C R 1kΩ 1 2W J R1416 NRSA02J 563X MG R 56kΩ 1 10W J R1418 NRSA02J 563X MG R 56kΩ 1 10W J R1419 NRSA02J 183X MG R 18kΩ 1 10W J Symbol No Part No Part Name Description RESISTOR R1421 NRSA02J 0R0X MG R 0 0Ω 1 10W J R1422 NRSA02J 0R0X MG R 0 0Ω 1 10W J R1423 NRSA02J 103X MG R 10kΩ 1 10W J R1501 NRSA02J 0R0X MG R 0 0Ω 1 10W J R1503 NRSA02J 103X MG R 10kΩ 1 10W J R1504 NRSA...

Page 6: ...J R1926 QRE121J 152Y C R 1 5kΩ 1 2W J R1929 QRE121J 332Y C R 3 3kΩ 1 2W J R1932 QRE121J 4R7Y C R 4 7Ω 1 2W J R1941 QRK129J 150 C R 15Ω 1 2W J Symbol No Part No Part Name Description RESISTOR R1942 NRSA02J 223X MG R 22kΩ 1 10W J R1943 QRE121J 152Y C R 1 5kΩ 1 2W J R1944 NRSA02J 103X MG R 10kΩ 1 10W J R1945 NRSA02J 332X MG R 3 3kΩ 1 10W J R1946 NRSA02J 123X MG R 12kΩ 1 10W J R1948 NRSA02J 152X MG R ...

Page 7: ...0V J C1677 NCB21HK 223X C CAP 0 022µF 50V K C1679 QETN1HM 105Z E CAP 1µF 50V M C1680 QETN1EM 476Z E CAP 47µF 25V M C1682 83 QETN1HM 475Z E CAP 4 7µF 50V M C1684 86 QETN1HM 106Z E CAP 10µF 50V M Symbol No Part No Part Name Description CAPACITOR C1691 92 QETN1HM 106Z E CAP 10µF 50V M C1693 94 NCB21HK 392X C CAP 3900pF 50V K C1701 NDC21HJ 102X C CAP 1000pF 50V J C1703 NCB21HK 102X C CAP 1000pF 50V K ...

Page 8: ...NSISTOR Q1201 02 2SC2412K QR X SI TRANSISTOR Q1301 02 2SC2412K QR X SI TRANSISTOR Q1341 42 2SC2412K QR X SI TRANSISTOR Q1351 53 2SC4544 LB SI TRANSISTOR Symbol No Part No Part Name Description TRANSISTOR Q1401 2SC2412K QR X SI TRANSISTOR Q1511 2SC2785 JH T SI TRANSISTOR Q1521 BSN304 T F E T Q1522 2SD2499 LB SI TRANSISTOR H OUT Q1601 2SC2412K QR X SI TRANSISTOR Q1603 DTC124EKA X DIGI TRANSISTOR Q16...

Page 9: ... 22kΩ 1 2W J R4712 QRE121J 561Y C R 560Ω 1 2W J R4713 QRE121J 103Y C R 10kΩ 1 2W J CAPACITOR C4701 QETN1EM 476Z E CAP 47µF 25V M C4702 QCB32HK 561Z C CAP 560pF 500V K COIL L4701 QQL03BJ 560Z COIL 56µH J DIODE D4702 SPR 39MVWF L E D TRANSISTOR Q4701 2SA933S QR T SI TRANSISTOR Q4702 2SC1740S QR T SI TRANSISTOR IC IC4701 PIC 37243SR IR DETECT UNIT OTHERS LC30190 001B A L E D HOLDER S4701 QSW0619 003Z...

Page 10: ...VER RM C363 1H PACKING PACKING PARTS LIST Ref No Part No Part Name Description 1 LC10058 017A PACKING CASE 2 LC10774 002A D CUSHION ASSY 4pcs in 1set 3 CP30899 001 R TOP COVER 4 CP30897 004 R POLY BAG 5 CP30897 001 R POLY BAG 6 RM C363 1H REMOCON UNIT 7 LCT1100 001A D INST BOOK 8 CM36242 012 R POS LABEL 2 3 1 2 4 8 5 6 7 ...

Page 11: ...T2922AR CK 3 4 Printed in Japan VP 0203 DP3051 VICTOR COMPANY OF J APAN LIMITED HOME AV NETWORK BUSINESS UNIT 12 3 chome Moriya cho Kanagawa ku Yokohama Kanagawa prefecture 221 8528 Japan ...

Page 12: ...ATED NEUTRAL side GND Therefore care must be taken for the following points 1 Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED NEUTRAL side GND simultaneously If the above caution is not respected an electric shock may be caused Therefore make sure that the power cord is surely removed from the receptacle when for example the chassis is pulled out 2 Do not short between the LIV...

Page 13: ...3 R381 UL MARK SCREEN D341 Y003 W050 R343 2 2 2 11 CONTENTS SEMICONDUCTOR SHAPES 2 2 BLOCK DIAGRAM 2 3 CIRCUIT DIAGRAMS MAIN FRONT CONTROL PWB CIRCUIT DIAGRAM 2 5 PATTERN DIAGRAMS MAIN PWB PATTERN 2 9 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 E C B E C B C B E B C E G D S E...

Page 14: ...1 Q202 BUFFER Q131 BUFFER IC101 18 10 4 5 SF101 SAW F Q101 AMP IF IC701 KEY R G B OUT C V IN V OUT FM OUT SP R IC601 AUDIO AMP 1 2 11 13 R L L R IN OUT IC251 VIDEO SW 1 4 6 8 R2 V2 L2 R1 V1 L1 R L INPUT 1 INPUT 2 OUT PUT VARIABLE IC651 MTS TONE VOL CONT 36 37 38 39 25 26 7 R L OUT R1 L1 IN R2 L2 IN V1 V TV V2 YS R G B ANT INPUT TU001 TUNER MAIN PWB BLOCK DIAGRAM 2 3 2 4 ...

Page 15: ...0 R811 33K R799 VD NFB OPT D705 150p CH C720 56k R001 OPT C002 MTZJ33A T2 D001 22 L131 820 R609 820 R605 1k R716 1k R717 1k R713 470p CH C705 0 01 C704 180k R712 120k R711 1k R710 1k R705 1 50 C773 220 R724 220 R726 220 R728 220 R730 OPT R733 0 C718 ABL HD OPT R684 OPT R683 3900p C637 3900p C638 47 50 BP C607 47 50 BP C604 0 R815 2 2k R754 2 2k R755 S CN00S OPT C723 1k R748 CRYSTRL X701 OPT C724 O...

Page 16: ...C545 2 2K R523 10K 1 2W R524 330P 500V QCB32HK 331Z C522 150P 500V QCB32HK 151Z C521 OPT Y002 OPT Y001 1000 16 C547 220 16 C546 9V REGULATOR AN7809F IC541 IN OUT OPT R545 BT VD HD 2 2K 3WOMR R532 22 1 2W R533 H OUT 2SD2499 LB Q522 BW K521 013 1 5k MPP QFZ0198 133 C524 0 47 200V MPP QFZ0119 474 C525 560 1W OMR R525 1 5k 2W OMR QRL029J 152 R526 620 R529 HV CN0HV 100 160 QEZ0203 107 C526 H LIN QQR113...

Page 17: ... W053 W054 W055 W057 W058 W0 64 W362 W363 W364 W365 D713 W367 W369 W371 W372 W373 W375 W066 W068 W070 W071 W072 W076 W078 W079 W080 W381 W382 W383 W384 W387 W390 W081 W082 W083 W086 W088 W0 90 D253 W395 W401 W405 W406 W408 C624 C622 R626 Q604 Q605 D202 D929 D702 C215 L703 W716 W717 D634 C780 C781 C779 R773 K301 Y201 W714 R423 W715 W718 R533 D512 IN C 1 2 4 3 2 4 5 3 1 E E E B ISOLATED 7 5 1 V CENT...

Page 18: ... POSS LABEL Not interchangeable MAIN PWB BOARD ASS Y Page 32 35 Parts No Symbol No SGA 1009A R2 AV T2912 AR SGA 1018A R2 AV T2912 ZAR Parts Name Description R1412 QRE121J 3R9Y CR 3 9Ω 1 2W J R1413 QRE121J 391Y QRE121J 561Y CR 560Ω 1 2W J R1414 QRX01GJ R82 QRX01GJ R68 MFR 0 68Ω 1W J R1415 QRE121J 102Y CR 1KΩ 1 2W J C1412 QFLC2AK 563Z QFLC2AK 393Z M CAP 0 039µF 100V K C1524 QFZ0117 9701 QFZ0117 1002...

Page 19: ...PANY OF JAPAN LTD AV T2922 AR CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 FEATURES 4 FUNCTIONS 5 SPECIFIC SERVICE INSTRUCTIONS 6 SERVICE ADJUSTMENTS 11 STANDARD CIRCUIT DIAGRAM APPENDIX 2 1 PARTS LIST 31 SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS GA ...

Page 20: ...25 Sub Mid Band 01 96 99 Intermediate Frequency PICTURE 45 75MHz VideoIF Carrier CHROMA 42 17MHz Sound IF Carrier 41 25MHz 4 5MHz Color Sub Carrier PAL M 3 57561149MHz PAL N 3 58205625MHz NTSC 3 579545MHz Power Input Operating Voltage 90V 260V AC 50Hz 60Hz Rated Voltage 120V 240V AC 50Hz 60Hz Power Consumption 115W max 85W avg Speaker 2 4 3 4 5 12cm Oval type 2 Audio Power Output 5W 5W Input Outpu...

Page 21: ...alternatives approved by the manufacturer of the complete product 7 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 8 When service is required obse...

Page 22: ...ntrol utilizes single chip ICs Built in HYPER SURROUND system CLOSED CAPTION broadcasts can be viewed MICRO COMPUTER PORT ASSIGNMENT IC701 PORT NUMBER PORT FUNCTION PORT NUMBER PORT FUNCTION 1 H SYNC 27 Vcc 2 V SYNC 28 OSC1 3 RF AFC 29 OSC2 4 REMOCON 30 RESET 5 NECK 31 POW ER ON OFF 6 SD 32 ENABLE 7 T ON OFF 33 CLOCK 8 KEY2 34 DATA 9 KEY1 35 LOCK 10 SP ON OFF 36 SDA2 11 NC 37 SDA1 12 NC 38 SCL2 13...

Page 23: ...imer indication REAR TERMINAL REMOTE CONTROL UNIT RM C363 INPUT 1 V L R terminal INPUT 2 V L R terminal VARIABLE AUDIO OUT L R terminal Aerial socket F type connector DISPLAY key CHANNEL key TV VIDEO key POWER button CLOSED CAPTION key CHANNEL NUMBER key SLEEP TIMER key HYPER SURROUND key VIDEO STATUS key MENU key COLOR SYSTEM key MENU key EXIT key VOLUME key ...

Page 24: ...g a check with power supplied be sure to confirm that the CRT earth wire is certainly connected REMOVING THE SPEAKER After removing the rear cover and chassis 1 As shown in Fig 1 remove the 4screws marked 2 Follow the same steps when removing the other hand speaker CHECKING THE MAIN PW BOARD To check the backside of the MAIN PW Board 1 Pull out the chassis Refer to REMOVING THE CHASSIS 2 Erect the...

Page 25: ...No 51917 AV T2922 7 Fig 1 C A B CRT SOCKET PWB W ithin MAIN PWB FRONT CONTROL PWB MAIN PWB CLAW CLAW REAR COVER FRONT CABINET D D CRT SPEAKER SPEAKER POWER CORD ...

Page 26: ...M CONSTANT table and check the setting items Where these differ select the setting item with the MENU keys and adjust the setting with the MENU keys The letters of the selected item are displayed in yellow 5 When adjustment has completed press the MENU key to store the setting value 6 Press the EXIT key twice to return to the normal screen 5 Receiving channel setting Refer to the OPERATING INSTRUC...

Page 27: ... 10 TV VIDEO TV DISPLAY OFF SLEEP TIMER 0 VIDEO STATUS ESTANDAR CLOSED CAPTION NO CC1 T1 HYPER SURROUND NO Settings of MENU screen TINTE ESTANDER COLOR ESTANDER CONTRASTE ESTANDER BRILLO ESTANDER DETALLE ESTANDER GRAVES CENTER AGUDOS CENTER BALANCE CENTER MTS ESTEREO ALTAVOCES SI AJUSTE DEL RELOJ Unnecessary to set TEMPORIZADOR NO LISTA DE CANALES Unnecessary to set ADJUSTECÓDIGO DE ACCESO Unneces...

Page 28: ...ers 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 ...

Page 29: ...in the list for this adjustment VRs transforms condensers etc 7 Preparation for adjustment Unless otherwise specified in the adjustment instructions preset the following functions with the REMOTE CONTROL UNIT User menu preset value MENU ITEM PRESET VALUE VIDEO STATUS ESTANDAR TINTE COLOR CONTRASTE BRILLO DETALLE ESTANDAR GRAVES AUGDOS BALANCE CENTER HYPER SURROUND NO MEASURING INSTRUMENT AND FIXTU...

Page 30: ...DED ASS Y SOLDER SIDE TOP TP E U E1 FRONT CONTROL PWB TP R T FRONT POWER SW PW P N IC701 TUNER 3Pin TP E 1Pin B1 TP 91 B1 1 3 HVT HVT HVT HVT IC702 UPPER FOCUS LOWER SCREEN MPX F901 N MEMORY S T HV 2Pin NC U CW T111 P DEG CRT SOCKET PWB Within MAIN PWB MENU VOLUME CHANNEL ...

Page 31: ...mode Do not adjust 8 VCO CW This mode adjusts the IF VCO mode 9 I 2 C BUS CTRL This mode is used when necessary to adjust the on off of the I 2 C bus control Do not adjust Fixed on 3 BASIC OPERATION OF SERVICE MENU 1 How to enter SERVICE MENU Press the DISPLAY key and the VIDEO STATUS key of the REMOTE CONTROL UNIT simultaneously and the SERVICE MENU screen will be displayed Fig 1 2 Selection of S...

Page 32: ...ERVICE MENU by pressing the EXIT key Then again press the EXIT key return to the normal screen SELECT BY OPERATEBY EXIT BY IT 1 PICTURE EX IT PICTURE MODE Adjustment value Select item SELECT BY OPERATEBY EXIT BY IT 1 OSD POS EX IT OTHERS MODE SELECT BY OPERATEBY EXIT BY IT 1 NOISE EX IT STANTUS STANTUS STANTUS STANTUS SOUND MODE GAM E SELECT BY OPERATEBY EXIT BY IT TINT GDRIVE COLOR B DRIVE PICTUR...

Page 33: ...Y IT VCO CW TOO HIGH ABOVEREFERENCE BELOW REFERENCE TOO LOW SYNC YES EXIT OPERATE BY EXIT BY IT EXIT SELECT BY OPERATE BY EXIT BY IT RF AFC FINE STATUS EXIT SERVICE MENU MAIN MENU HIGH LIGHT MODE VOC CW M ODE I2C BUS O N I2C BUS CTRL MODE FIXED ON VIDEO STATUS MODE THEATER SELECT BY OPERATE BY EXIT BY IT TINT G DRIVE COLOR B DRIVE PICTURE R CUT BRIGHT G CUT DETAIL B CUT EXIT RF AFC CHK MODE DO NOT...

Page 34: ...re adjusted in the video mode the setting values in each item are revised independently No Setting Adjustment item Variable range Initial setting value 1 PICTURE 0 127 60 2 BRIGHT 0 127 64 3 COL PALM 0 127 80 4 COL PALN 0 127 80 5 COL NTSC 0 127 95 6 TINT 0 127 65 7 TV DTL 0 63 33 8 EXT PIC 25 0 9 EXT BRI 25 0 10 EXT COL 25 4 11 EXT TINT 25 3 12 EXT DTL 0 63 30 13 P N KILL 0 1 0 14 Y S CONT 0 31 3...

Page 35: ... No Setting Adjustment item Variable range Initial setting value 1 NOISE 0 1 1 2 IN LEVEL 0 63 50 3 FH MON 0 1 0 4 ST VCO 0 63 25 5 PILOT 0 1 0 6 FILTER 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 0 10 0 VIDEO STATUS MODE Initial setting value Setting Adjustment item Variable range THEATER GAME TINT 20 0 0 COLOR 20 3 3 PICTURE 30 20 10 ...

Page 36: ...ge Initial 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 CHK 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 O...

Page 37: ...C broadcast 2 Select the VCO CW mode from the SERVICE MENU 3 It checks that turn the CW TRANSF and the character of TOO HIGH changes to yellow 4 Next it checks that turn the CW TRANSF on the contrary and TOO LOW changes to yellow 5 At this time it checks that SYNC is YES 6 Turn the CW TRANSF and it is made for the character of BELOW REFERENCE to become yellow Again it checks that SYNC is YES FOCUS...

Page 38: ... MODE in SERVICE MENU 3 Press the MUTING key and turn off the color 4 With the MENU key get noise in the screen picture Zero side of setting value 5 Press the MENU key and stop when noise disappears from the screen 6 Change to other channels and make sure that there is no irregularity 7 Press the MUTING key and get color out Setting Item Variable range Initial setting value No 60 RF AGC 0 255 160 ...

Page 39: ...tom of screen is to be located within the 85 95 range V HEIGHT V POSITION V LIN V S CR adjustment Signal generator Remote control unit No 50 V POS 50 No 51 V SIZE 50 No 52 V S CR50 No 53 V LIN 50 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 MO...

Page 40: ... H POS 60 until the screen will be horizontally centered H POSITION adjustment Signal generator Remote control unit No 48 H POS 50 1 Receive a crosshatch signal PAL N 2 Select the No 48 H POS 50 of the PICTURE mode in SERVICE MENU 3 Confirm the initial setting value of the No 48 H POS 50 4 Adjust the No 48 H POS 50 until the screen will be horizontally centered H H 60Hz PAL M or NTSC signal adjust...

Page 41: ...een VR gradually to the right from the left until either one of the red blue or green colors appears faintly 8 Use keys of the remote control unit and adjust the other 2 colors which except the appeared color to where the single horizontal line appears white 9 Turn the screen VR to where the single horizontal line glows faintly 10 Press the key to release the single horizontal line 11 Adjust the B...

Page 42: ...f the No 2 BRIGHT 4 If the brightness is not the best with the initial setting value make fine adjustment of the No 2 BRIGHT until you get the optimum brightness SUB CONTRAST adjustment Remote control unit No 1 PICTURE 1 Receive a NTSC broadcast 2 Select No 1 PICTURE of the PICTURE mode in SERVICE MENU 3 Confirm the initial setting value of the No 1 PICTURE 4 If the contrast is not the best with t...

Page 43: ...ial setting value make fine adjustment until you get the best color NTSC 1 Receive a NTSC broadcast 2 Select No 5 COL NTSC of the PICTURE mode in SERVICE MENU 3 Confirm the initial setting value of the No 5 COL NTSC 4 If the color is not the best with the initial setting value make fine adjustment until you get the best color SUB TINT adjustment Remote control unit No 6 TINT 1 Receive a NTSC color...

Page 44: ...hrough 1MΩ resistor 3 Select the No 9 5FH MON of the SOUND mode in SERVICE MENU and reset the setting value from 0 to 1 4 Connect the frequency connector to R OUT RCA pin of the AUDIO OUT 5 Select the No 10 SAP VCO 6 Confirm the initial setting value of No 10 SAP VCO 7 Adjust the No 10 SAP VCO so that the frequency connector will display 78 67kHz 0 5kHz 8 Select the No 9 5FH MON of the SOUND mode ...

Page 45: ...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 W EDGE D...

Page 46: ... 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 glue Adjustment for the models equipped with differential coil If the lines are not aligned as shown in...

Page 47: ...sistor between X connector 1 3 3 Make sure that the screen picture disappears 4 Temporarily unplug the power plug 5 Remove the resistor between X connector 1 3 6 Again plug the power plug make sure that the normal picture is displayed on the screen B1 T522 Q942 HEATER R562 D561 FR561 X C561 R563 IC701 31 48 Q511 D510 D562 3 2 1 5 Q941 Q522 10 4 3 IC201 H OUT T521 Q521 H Vcc Fig 1 RESISTOR RESISTOR...

Page 48: ...r 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 microcomputer detects at 1 second intervals If NG is detected for more than 1 ms a malfunction is interpreted...

Reviews:

No comments

Brands by name

Popular brands

Load more brands