JVC AV-21F9 Service Manual Download

Page: 1 / 26

No. 56037

AV-21F9

CONTENTS

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SPECIFICATIONS ........................................................................................................................... 2

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SAFETY PRECAUTIONS ................................................................................................................ 3

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FEATURES ...................................................................................................................................... 4

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OPERATING INSTRUCTIONS (APPENDED) .............................................................................. 1-1

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SPECIFIC SERVICE INSTRUCTIONS ............................................................................................ 4

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SERVICE ADJUSTMENTS ............................................................................................................ 10

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STANDARD CIRCUIT DIAGRAM (APPENDED) ......................................................................... 2-1

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PARTS LIST ................................................................................................................................... 27

BASIC CHASSIS

CM-

SERVICE MANUAL

COLOUR TELEVISION

AV-21F9

(NS)



2000 VICTOR COMPANY OF JAPAN, LTD.

No. 56037

Aug. 2000

AV-21F9

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Summary of Contents for AV-21F9

Page 1: ...4 OPERATING INSTRUCTIONS APPENDED 1 1 SPECIFIC SERVICE INSTRUCTIONS 4 SERVICE ADJUSTMENTS 10 STANDARD CIRCUIT DIAGRAM APPENDED 2 1 PARTS LIST 27 BASIC CHASSIS CM II SERVICE MANUAL COLOUR TELEVISION AV 21F9 NS COPYRIGHT 2000 VICTOR COMPANY OF JAPAN LTD No 56037 Aug 2000 AV 21F9 ...

Page 2: ...Table 1 If the value is different select the setting item with the MENU a key and set the correct value with the MENU key 4 Press the DISPLAY key twice to return to the normal screen 5 Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the receive channels channels preset NAME OF REMOTE CONTROL KEYS Fig 1 6 User setting Check the user setting values in Table 2 and if setting value...

Page 3: ...AL MODE STEREO BLUE BACK OFF PICTURE MODE VSM BRIGHT ON TIMER PR1 0 00 LIVE SPATIAL OFF CHILD LOCK OFF USER SETTING VALUES Table 2 CHANNEL PRESET SETTING OF SYSTEM CONSTANT SET Table 1 Setting item Setting contents Setting value 1 COLOUR AUTO NO 2 COLOUR MULTI 3 ECO SENSOR YES 4 BASS NO SB ON 5 VOL LIMITER YES 6 TEXT NO 7 MSP YES 8 LANGUAGE E R A F 9 EW PIN IC NO 10 B B OFF MUTE OFF 11 LED 2 12 D ...

Page 4: ...rn the TV power off the Turbo Timer is automatically set to OFF SERVICE MENU SETTING ITEMS Table 3 Service menu Setting item 1 IF 1 VCO 2 DELAY POINT 2 V C 1 CUTOFF R G B 2 DRIVE R B 3 BRIGHT 4 CONT 5 COLOUR 6 TINT 7 BLACK OFFSET R Y B Y 8 SHARP 9 TEXT RGB CONT 10 B S OFF 11 B S POINT 12 DC TRAN RATE 13 APA CON FO SW 14 VSM PHASE 15 VSM GAIN 16 CLL SW 17 CLL LEVEL 18 ABL POINT 19 ABL GAIN 20 Y DL ...

Page 5: ...e to OFF TIMER ON TIMER and AUTO SHUTOFF Note When you turn the TV power off the Turbo Timer is automatically set to OFF 1 There are 2 ways for adjusting this TV One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components 2 The setting adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values The setting value...

Page 6: ...o the SERVICE MENU 2 DELAY POINT a 1 Key Select 1 IF b 2 Key Select 2 DELAY POINT c MENU Key Adjust the setting value d DISPLAY Key When this is pressed twice you will return to the SERVICE MENU 2 2 V C 3 AUDIO 4 DEF 5 VSM PRESET and 6 CENTER a 2 6 Keys Select one from 2 V C 3 AUDIO 4 DEF 5 VSM PRESET and 6 CENTER b MENU a key Select setting items c MENU Key Adjust the setting values of the settin...

Page 7: ...BLACK OFFSET R Y B Y 8 SHARP 9 TEXT RGB CONT 10 B S OFF 11 B S POINT 12 DC TRAN RATE 13 APA CON FO SW 14 VSM PHASE 15 VSM GAIN 16 CLL SW 17 CLL LEVEL 18 ABL POINT 19 ABL GAIN 20 Y DL TV VIDEO S 21 P ACL SW 22 WPL SW 23 Y GAMMA Setting item PAL 1 CUTOFF R G OPERATE DISP EXIT B a SELECT V C 50Hz SUB MENU 2 V C Setting item 1 ERROR LIMIT 2 A2 ID THR 3 SOUND SYSTEM OPERATE DISP EXIT a SELECT AUDIO MHz...

Page 8: ...s TOO HIGH displayed on the screen changes from blue to yellow Step 1 5 Then slowly turn the core of VCO CW TRANSF counterclock wise until the characters ABOVE REFERENCE changes from blue to yellow Step 2 6 Further slowly turn the core of VCO CW TRANSF until the colour of the characters BELOW REFERENCE changes from blue to yellow Step 3 7 Press the DISPLAY key three times to return to normal scree...

Page 9: ...g values which adjust the screen to the optimum condition can be different from the initial setting values Do not change the initial setting values of the setting adjustment items not listed in ADJUSTMENT Colour system Variable Initial setting value Setting item range PAL SECAM NTSC 3 58 NTSC 4 43 1 CUT OFF R G B 128 127 0 b b b 2 DRIVE R B 128 127 0 b b b 3 BRIGHT 128 127 19 b b b 4 CONT 42 42 4 ...

Page 10: ...ingle horizontal line appears white 7 Turn the SCREEN VR to where the single horizontal line glows faintly 8 Press the 2 key to return to 1 CUTOFF screen 9 Press the DISPLAY key twice to return to the normal screen 1 Receive a black and white signal colour off 2 Select 2 V C from the SERVICE MENU 3 Select 2 DRIVE R B with MENU a key and set each value to initial setting value with 4 and 7 keys or ...

Page 11: ...U or key 5 If the contrast is not the best with the initial set value make fine adjustment until you get the best contrast 6 Press the DISPLAY key twice to return to the normal screen Method of adjustment without measuring instrument PAL COLOUR 1 Receive a PAL broadcast 2 Select 2 V C from the SERVICE MENU 3 Select 5 COLOUR with the MENU a key 4 Set the initial setting value for PAL COLOUR with th...

Page 12: ... or key 5 Connect the oscilloscope between TP 47G and TP E 6 Adjust PAL COLOUR to set the value A in the figure to 12V W G SECAM COLOUR 1 Receive a SECAM full field colour bar signal 75 white 2 Set the initial setting value of SECAM COLOUR with the MENU or key 3 Adjust SECAM COLOUR to set the value A in the figure to 9V W G NTSC 3 58 COLOUR 1 Receive a NTSC 3 58 full field colour bar signal 75 whi...

Page 13: ...ke fine adjustment until you get the best tint 6 Press the DISPLAY key twice to return to the normal screen NTSC 4 43 COLOUR When adjustment is done for NTSC 3 58 TINT appropriate val ues are automatically set for NTSC 4 43 TINT Method of adjustment using measuring instrument NTSC 3 58 TINT 1 Receive a NTSC 3 58 colour bar signal full field colour bar 75 white 2 Select 2 V C from the SERVICE MENU ...

Page 14: ...y twice to return to the normal screen Method of adjustment using measuring instrument 1 Receive a SECAM COLOUR bar signal full field colour bar 75 white 2 Select 2 V C from the SERVICE MENU 3 Select 7 BLACK OFFSET with the a key 4 Connect the oscilloscope between pin 35 of IC 201 and TP E 5 By using 4 and 7 keys on the remote control unit adjust the BLACK OFFSET R Y so that the waveform changes f...

Page 15: ...tion fv 50Hz mode 1 Receive a circle pattern signal of vertical frequency 50Hz 2 Select 4 DEF from the SERVICE MENU 3 Select 2 V SHIFT with the MENU a key 4 Set the initial setting value of 2 V SHIFT with the MENU key 5 Adjust V SHIFT to make A B with the MENU key 6 Receive a cross hatch signal 7 Select 3 V SIZE with the MENU a key 8 Set the initial setting value of 3 V SIZE with the MENU key 9 Ad...

Page 16: ...ed remark ably perform the following steps 14 Receive a cross hatch signal 15 Select 7 V S CR with the MENU a key 16 Set the initial setting value of 7 V S CR with the MENU key 17 Select 10 V LINE with the MENU a key 18 Set the initial setting value of 10 V LINE with the MENU key 19 Adjust V S CR and V LINE so that the spaces of each line on TOP CENTER and BOTTOM become uniform 20 Make sure that t...

Page 17: ... not adjust VSM preset VSM mode BRIGHT STANDARD SOFT Setting item 1 TINT 0 b b b b b b b b b b SETTING VALUE 2 COLOUR 0 b b b b b b b b b b SETTING VALUE 3 BRIGHT 0 b b b b b b b b b b SETTING VALUE 4 CONT 15 4 4 SETTING VALUE 5 SHARP 0 b b b b b 3 SETTING VALUE Setting Values for SUB MENU 5 VSM PRESET AUDIO ADJUSTMENT Do not adjust 3 AUDIO 1 ERROR LIMIT 2 A2 ID THR 3 SOUND SYSTEM in the SERVICE M...

Page 18: ... low B line is detected Operation of CRT NECK protec tion circuit Method of detection The main microcomputer detects the possible abnormality at 30 msec intervals and judges the re sults in every 16 time Of the 16 times if NG is detected more than 9 times it is judged that there is an abnormality DITTO State of abnormality When an abnormality has been detected the SUB POWER is turned off While the...

Page 19: ...age V Electrolytic Capacitors 47 50 Example Capacitance value µF withstand voltage V Type No indication Ceramic 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 ...

Page 20: ...N 1 N 1 N SEMICONDUCTOR SHAPES CONTENTS SEMICONDUCTOR SHAPES 2 4 BLOCK DIAGRAM 2 5 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM 2 7 AV SW PWB CIRCUIT DIAGRAM 2 9 IF PWB CIRCUIT DIAGRAM 2 11 CRT SOCKET PWB CIRCUIT DIAGRAM 2 13 FRONT CONTROL PWB CIRCUIT DIAGRAM 2 15 PATTERN DIAGRAMS FRONT CONTROL PWB PATTERN 2 16 MAIN PWB PATTERN 2 17 AV SW PWB PATTERN 2 19 IF PWB PATTERN 2 20 CRT SOCKET PWB PATTERN 2 ...

Page 21: ...C Y Y IN C IN V OUT R OUT L OUT Y OUT C OUT TV V V L R IC401 VIDEO SW V L R LINE OUT V2 L2 R2 V1 L1 R1 S1 IN S VIDEO 1 L R 10 1 IC601 SURROUND 3 L 11 5 R 6 IC602 VOL TONE IC301 COMB FILTER Y C SW C OUT Y OUT V IN DL301 17 L 16 R L L R 34 33 IC501 MULTI SOUND PROCESSOR IC101 P IF S IF SELECTOR 5 6 17 58 R IC701 MICRO COMPUTER IC201 V C DEF PROCESSOR RGB 12 13 14 45 42 Y C MAIN PWB CRT SOCKET PWB R ...

Page 22: ...6037 2 8 AV 21F9 AV 21F9 DIAGRAMS MAIN PWB CIRCUIT DIAGRAM AV SW PWB ASS Y FOR FRONT CONTROL PWB ASS Y PARTS PARTS AV 21F9 NS AV 21F9 NS FOR CRT SOCKET PWB ASS Y FOR CRT SOCKET PWB ASS Y N PWB ASS Y 1617A H2 AV 21F9 NS ...

Page 23: ...No 56037 No 56037 2 6 2 5 AV 21F9 AV 21F9 2 10 2 9 SW PWB CIRCUIT DIAGRAM AV SW PWB ASS Y SCM0Y208A H2 AV 21F9 NS ...

Page 24: ...No 56037 2 7 No 56037 2 8 AV 21F9 AV 21F9 CUIT DIAGRAM 2 12 2 11 M0F201A H2 AV 21F9 NS PWB ASS Y PARTS PARTS PARTS PARTS AV 21F9 NS AV 21F9 NS AV 21F9 NS AV 21F9 NS ...

Page 25: ...No 56037 No 56037 2 6 2 5 AV 21F9 AV 21F9 2 14 2 13 SOCKET CIRCUIT DIAGRAM PARTS AV 21F9 NS FOR MAIN PWB ASS Y FOR MAIN PWB ASS Y SCM 3201A H2 AV 21F9 NS A51LMV20X ...

Page 26: ... p 14 MUTING button p 17 Number buttons p 13 button p 13 OFF TIMER button p 21 ECO SENSOR button p 21 RM C237 REMOTE CONTROL UNIT DISPLAY LIVE SPATIAL MENU POWER CHANNEL VOLUME SYSTEM COLOUR OFF TIMER TV VIDEO PICTURE MODE CHANNEL SCAN ECO SENSOR SOUND MUTING RETURN I II 1 2 3 4 5 6 7 8 0 9 0 9 8 7 6 5 4 3 2 1 3 1 MENU buttons p 26 MENU button MENU buttons 2 CHANNEL buttons p 14 3 VOLUME buttons p...

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