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JVC AV-14F71/VT, Service Manual

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JVC AV-14F71/VT Service Manual Download Page 26

No. 51918

AV-14F71

26

Item

Measuring

instrument

Test point

Adjustment part

Description

●

●

●

●

When the vertical linearity has been deteriorated

remarkably, perform the following steps.

13.  Input a cross-hatch signal.

14. Select 

4. VER. LIN.

 with the MENU 

▼

/

▲

 key.

15.  Set the initial setting value of 

4. VER LIN. 

with the MENU - / +

key.

16. Select 

5. VER. SCURVE 

with the MENU 

▼

/

▲

 key.

17. Set the initial setting value of 

5. VER. SCURVE 

with the

MENU - / + key.

18. Adjust 

4. VER. LIN.

 and 

5. VER. SCURVE 

so that the spaces

of each line as shown in Fig.3 on 

TOP

, 

CENTER

 and

BOTTOM

 become uniform.

Adjustment

of VER. LIN.

& VER.

SCURVE

Signal
generator

Remote
control unit

4. VER. LIN.

5. VER. SCURVE

Make sure that the adjustment is properly done on the screen of

60Hz mode.

[NOTE]

"

 

Adjust to make both 50Hz & 60Hz are the same v. size and

fine straight line.

"

 

When adjust again, adjust 50Hz mode first.

"

 

When adjust in 60Hz mode, only 60Hz mode is adjust.

TOP

CENTER

BOTTOM

Fig.3

Summary of Contents for AV-14F71/VT

Page 1: ... JAPAN LTD AV 14F71 VT CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 FEATURES 4 FUNCTIONS 5 SPECIFIC SERVICE INSTRUCTIONS 6 SERVICE ADJUSTMENTS 13 PARTS LIST 31 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM 2 1 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS CG ...

Page 2: ...z Intermediate Frequency SIF Carrier 32 5MHz 5 5MHz 33 5MHz 4 5MHz 31 5MHz 6 5MHz 32 0MHz 6 0MHz Colour Sub Carrier Frequency PAL 4 43MHz SECAM 4 40625MHz 4 25MHz NTSC 3 58MHz 4 43MHz Operating Voltage AC90 260V 50 60Hz Power Input Rated Voltage AC110 240V 50 60Hz Power Consumption 70W Max 47W Avg Speaker 5cm 9 cm Oval type 2 Audio Output 3W monaural Aerial Input Terminal 75Ω Unbalanced Input Vide...

Page 3: ...or 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 10k 2W resistor to the anode button 8 When service is required ob...

Page 4: ...ntrol utilizes single chip ICs for IF V C DEF VSM PRESET PRESET TURBO TIMER By means of AUTO PROGRAM the TV stations can be selected automatically and the TV channels can also be rearranged automatically Built in ECO MODE ECONOMY ECOLOGY In accordance with the brightness in a room the brightness and of contrast of the picture can be adjusted automatically to make the optimum picture which is easy ...

Page 5: ...3 COLOUR SYSTEM key 4 COLOUR SYSTEM key 5 TV VIDEO key 6 OFF TIMER key 7 CHANNEL SCAN key 8 RETURN key 9 DISPLAY key A CHANNEL key B POWER key C PICTURE MODE key D Number CH key E key F MUTING key G MENU key MENU key MENU key H VOLUME key 1 MENU buttons 2 CHANNEL buttons 3 VOLUME buttons 4 ECO sensor 5 REMOTE CONTROL sensor 6 ON TIMER lamp 7 POWER lamp 8 MAIN POWER button 8 A V INPUT terminal A HE...

Page 6: ...r 1 As shown in figure remove the 4 screws marked 2 Follow the same steps when removing the other hand speaker CHECKING THE MAIN PW BOARD 1 To check the back side of the PW Board 4 Pull out the MAIN PW Board Refer to REMOVING THE MAIN PW Board 1 Erect the PW Board vertically so that you can easily check the back side of the PW Board CAUTION When erecting the PW Board be careful so that there will ...

Page 7: ...No 51918 AV 14F71 7 CRT SOCKET PWB D FRONT CABI POWER CORD 1 5 4 SPEAKER MAIN PWB REAR COVER C B A ...

Page 8: ...le 1 If the value is different select the setting item with the MENU key and set the correct value with the MENU key 5 Press the DISPLAY key twice and return to the normal screen 5 Receive channel of setting Refer to the OPERATING INSTRUCTIONS and set the receive channels channels preset as described 6 User Setting Check the user setting value of Table 2 and if setting value is different set the c...

Page 9: ...UES Setting item Setting value Setting item Setting value SUB POWER ON LANGUAGE VIET CHANNEL POSITION 1 POSITION CHANNEL PRESET Refer to OPERATING INSTRUCTION VOLUME About 10 ECO SENSOR OFF TV VIDEO TV VNR OFF ON SCREEN DISPLAY POSITION INDICATION AUTO SHUTOFF OFF COLOUR SYSTEM PAL ON TIMER PR1 0 00 SOUND SYSTEM B G BLUE BACK OFF OFF TIMER OFF OSD Shows 00 CHILD LOCK OFF PICTURE MODE VSM BRIGHT PI...

Page 10: ... OFF BLUE 128 127 50 RED 2 DRIVE BLUE 128 127 0 3 BRIGHT 127 127 0 4 CONT 63 63 0 5 COLOUR 63 63 0 TV 0 0 6 TINT VIDEO 63 63 8 0 7 SECAM BL ADJ 31 31 0 TV 15 Fixed 8 SHARP Do Not Adj VIDEO 32 31 5 Fixed 9 AMP T SHARD Do Not Adj 14 3 DEFLECTION Initial setting value Setting item Variable range fv 50Hz MODE fv 60Hz MODE 1 VER POSITION 04 03 2 3 2 HOR POSITION 16 15 1 4 3 VER HEIGHT 64 63 40 0 4 VER ...

Page 11: ... 1 1 1 4 GAMMA 0 0 0 0 TV 0 2 2 3 5 Y DELAY TIME VIDEO 0 2 0 2 6 BLACK EXP START 3 3 3 3 TV 1 1 0 0 7 C BPF VIDEO 1 1 1 1 8 CW SCP 0 0 0 0 9 VIF DET LEVEL 0 0 0 0 11 IF AGC MIN 0 0 0 0 12 VIF AGC 0 0 0 0 13 VIF PMOD 0 0 0 0 19 VNR 15 15 15 15 20 RGB LIM 1 1 1 1 21 RGB LIMIT LEVEL 2 2 2 2 23 TEXT H POSITION 3 3 3 3 24 READ DATA Sound System Do Not Adjust Setting item B G I D K M 10 SIF DET LEVEL 0 ...

Page 12: ...LACING PROCEDURES 1 Turn the POWER OFF 2 Replace the IC301 with a new one 3 While pressing MENU button and VOL button ON the FRONT CABINET simultaneously turn the POWER ON When the POWER is turned ON the data is written in the micro computer immediately LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS 1 MENU buttons 2 CHANNEL buttons MENU buttons 3 VOLUME buttons MENU buttons 4 ECO sensor 5 REMOTE CONTR...

Page 13: ...repare the most suitable reception or input signal for adjustment 6 Never touch any adjustment parts which are not specified 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 mode position PICTURE MODE VSM BRIGHT VNR OFF TINT COLOUR BRI...

Page 14: ...ESET Adjustment of the RF circuit Do not adjust 6 TURBO TIMER For quick setting the TIMER count value adjustable not only by minuets but also by second Should be OFF Key operation of the SERVICE MENU Enter to SERVICE MENU Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL UNIT simultaneously Then enter the SERVICE MENU mode as shown in Fig 1 Exit from SERVICE MENU When complete t...

Page 15: ... DISPLAY Key When this is pressed twice you will return to the SERVICE MENU 2 V C 3 DEF and 4 VSM PRESET 2 4Key Select one from 2 V C 3 DEF and 4 VSM PRESET MENU Key Select setting items MENU Adjust the values of the items DISPLAY Key When this is pressed return to the SERVICE MENU 6 TURBO TIMER By pressing the 6 key you can change the ON or OFF should be OFF Should be OFF If it is ON the timer in...

Page 16: ... OVER OPERATE DISP EXIT 6 TURBO TIMER ON OFF By pressing 6 key SERVICE MENU 1 IF 2 V C 3 DEF 4 VSM PRESET 5 PRESET 6 TURBO TIMER OFF 1 6 SELECT DISP EXIT OFF V C PAL 1 CUTOFF R G B 50Hz SUB MENU 2 V C DEF SUB MENU 3 DEF 50Hz 1 VER POSITION PAL PRESET 1 C TRAP FIX 50Hz SUB MENU 5 PRESET B G PAL BRIGHT TINT COLOUR BRIGHT CONT SHARP SUB MENU 4 VSM PRESET SELECT OPERATE DISP EXIT SELECT OPERATE DISP E...

Page 17: ...Pin TP 91 B1 2Pin NC 3Pin X ray2 4Pin X ray1 5Pin TP E HVT S1 HV U IC301 MEMORY IC IC702 IC701 F901 DEG TU001 FRONT TOP MAIN PWB CRT SOCKET PWB SOLDER SIDE TP 47G E1 U T PW UPPER FOCUS LOWER SCREEN TP 47R TP 47B TP E T CRT EARTH WIRE BRAIDED ASS Y ...

Page 18: ... Description Please use signal generator which is correct proof about the sending frequency Adjustment of VCO CW Signal generator Remote control unit 1 VCO 1 Input the PAL full colour bar 210 25MHz signal 2 Select 1 IF from the SERVICE MENU 3 Press 1 key and select 1 VCO 4 Select VCO ADJUST with MENU key 5 Press MENU key until the colour of the characters TOO HIGH changes blue to yellow Then gradu...

Page 19: ...m the SERVICE MENU 3 Select 2 DELAY POINT by pressing the 2 key on the remote control unit 4 Set the setting values of the setting items as shown bellow table 5 Then adjust the MENU or key until video noise disappears 6 Turn to other channels and make sure that there are no irregularities Setting Item Variable range Initial setting value NTSC 3 58 48 DELAY POINT AGC TAKE OVER OTHER 0 127 43 DELAY ...

Page 20: ... and adjust the other 2 colours which except the appeared colour to where the single horizontal line appears white 7 Turn the SCREEN VR to where the single horizontal line glows faintly 8 Press the 2 key to turn off the single horizontal line 9 Press the DISPLAY key twice to return to the normal screen Adjustment of WHITE BALANCE High light Signal generator Remote control unit 2 DRIVE R DRIVE B 1 ...

Page 21: ...s not the best with the initial set value make fine adjustment until you get the best contrast 5 COLOUR 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 key 4 Set the initial setting value for PAL COLOUR with the MENU or key 5 If the colour is not the best with the initial set value make fine...

Page 22: ... 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 bring the value of A in the illustration to 5V W G Voltage value between W and G NTSC 3 58 COLOUR 1 Input a NTSC 3 58 full field colour bar signal 75 white 2 Set the initial setting value of NTSC 3 58 COLOUR with the MENU or key 3 Adjust NTSC 3 58 COLOUR to bri...

Page 23: ... TINT When NTSC 3 58 is set NTSC 4 43 will be automatically set at the respective values 6 TINT Method of adjustment using measuring instrument NTSC 3 58 TINT 1 Input a NTSC 3 58 full field colour bar signal 75 white 2 Select 2 V C from SERVICE MENU 3 Select 6 TINT with the MENU key 4 Set the initial setting value of NTSC 3 58 with the MENU or key 5 Connect the oscilloscope between TP 47R G and TP...

Page 24: ...ing value with the or MENU key 5 Switch the key colour OFF and key colour ON on the remote control and make sure that there is no colour on the black and white screen 6 If the black and white screen is not best with the initial setting value make fine adjustment until you get the best black and white screen 7 While watching the screen adjust the value to be the same colour between ON OFF by Ten ke...

Page 25: ...t 3 DEF from SERVICE MENU 3 Select 1 VER POSITION with the MENU key 4 Set the initial setting value 1 VER POSITION with the MENU key 5 Adjust 1 VER POSITION to make V V as shown in Fig 2 with the MENU key 6 Select 3 V HEIGHT with the MENU key 7 Set the initial setting value with the MENU key 8 As shown in Fig 1 adjust VER HEIGHT and make the vertical screen size 92 of the picture size with the MEN...

Page 26: ... Set the initial setting value of 5 VER SCURVE with the MENU key 18 Adjust 4 VER LIN and 5 VER SCURVE so that the spaces of each line as shown in Fig 3 on TOP CENTER and BOTTOM become uniform Adjustment of VER LIN VER SCURVE Signal generator Remote control unit 4 VER LIN 5 VER SCURVE Make sure that the adjustment is properly done on the screen of 60Hz mode NOTE Adjust to make both 50Hz 60Hz are th...

Page 27: ...ERVICE MENU 2 Select BRIGHT with the PICTURE MODE key 3 Adjust the MENU and MENU or key to bring the set values of TINT SHARP to the values shown in the table 4 Respectively select the VSM PRESET mode for SOFT and STANDARD and make similar adjustment as in 3 above BRIGHT TINT COLOUR BRIGHT CONT SHARP SELECT OPERATE DISP EXIT Mode item BRIGHT STANDARD SOFT TINT 15 COLOUR 15 BRIGHT 15 CONT 30 15 11 ...

Page 28: ...nto the 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 WED...

Page 29: ...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 30: ...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 31: ...AV14F71VT CK 999 4 VP 0111 DP7051 VICTOR COMPANY OF JAPAN LIMITED HOME AV NETWORK BUSINESS UNIT 12 3 chome Moriya cho Kanagawa ku Yokohama Kanagawa prefecture 221 8528 Japan ...

Page 32: ...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 33: ... B 4KLM44L9N BI O 5LKK PPQ44RKM445 Q 3 6 ST 5 54 75M45N6MQU T O 6C B K H8N 4M44KMQ 93 H6 U 7 74N5RM445 MQ B B J OJ 8 74N5 M445CMQ B B S L H7LK7LM447MQ S I N 74N5NM4486MQ OJB U OC R K4K KM4486MQ O O U OC PH 84 4MK449L OJB O H8R44LM645MQ OJB O 6H 5K QIC445NM46 C 6 B J B 57 68 8LRM8MS S I 58 H8 588M44KMQ JC S O B 5L P6S44L8M445 S B6UB D KES O5 5N H5K N5M 45MUQ B6 O3B 5R PFSCSTI845NV 6 I S BJ D LE 5 P...

Page 34: ...No 51918 AV 14F71 33 CRT SOCKET PWB Within MAIN PWB MAIN PWB L01 V01 8 19 1 13 12 15 9 14 16 17 18 1 5 T1522 20 ...

Page 35: ...MLN5 LN4 5ZKJ 9 5885 S64K9M KK HI K 5Z54J 9 588K S64K9M547 HI 54 5Z54J 9 5887 P B5KK9M5 4 5 4 5ZKJ 9 58L7 S64K9MKRK HI K R 5Z54J 9 5L45 P B5KK9M545 544 5ZKJ 9 SW X Y 01 0 2 BS S O 5L4K S64K9M4 4 HI 4 4 5Z54J 9 5L47 S64K9MN K HI N 5Z54J 9 5LK5 S64K9MN 5 HI N 4 5Z54J 9 5LKK S64K9M547 HI 54 5Z54J 9 5LK8 P 47B9MN 4 OH N 7J 9 5LKN P B5K59MKR4F KR 5ZKJ 9 5LK P B5KK9M8R5 8R4 5ZKJ 9 5LK P I4K 9MKR5 OH KR4...

Page 36: ...O 5757 PB 5QHM77LV B 6 7 7 T L43 H 5758 CK5QUM547 6 4 45 T L43 U 575L PB H5 HM54R B 6 544 T 5N3 H 575N PB H5QHM54N B 6 54 T L43 H 575R CK5QUM8R7 6 4 48R T L43 U 57K5 K5Q9M5K4 6 5K1T L43 9 57KK CK5QUMKR7 6 4 4KR T L43 U 57K7 PB H5QHM8R8 B 6 4 8R T L43 H 57K8 PB H5QHM54N B 6 54 T L43 H 57KL PB C5QHM54N C B 6 54 T L43 H 57KN SK5Q9MKK5 6 KK41T L43 9 5785 PB H5QHM54N B 6 54 T L43 H 57LK PTV44 RM547 HH ...

Page 37: ...N 5S 5K8M8446M K S O B 5785M8K H6555M S O B 58K5MKK H677N4ZHZM VB B O B 58K7 5S 5K8M8446M K S O B 58K8MKL H6555M S O B 58KR H67KR4ZQZM VB B O B 5LL5 I 549M SM 7 S O B 5LLK Q5SM 7 S O B 5LL7 H674 5ZHZM VB B O B 5LL8 H6555M S O B 5LR5 H674RLZHZM VB B O B SW X Y 01 0 2 O B 5L 5 H67K44ZHZM VB B O B 5L K I 549M SM 7 S O B 5NL5MLK H6555M S O B 5NL7 H V95 6M K VB B O B 5R45 H6555M S O B 5R48 M57K M 5N B ...

Page 38: ...5 K8 PP 5557M445V TB B CB6 S U5 85M87 PP 5557M445V TB B CB6 S T5 45 PP 54 LM44K B T B 5R45 5K85M48 S 5 K5 5K7TK D Q OA B E F5 R5 PSU44N5M44K B 6F S5R45 PSJ4N5 M447V ASQ SJ Q 3O S5R4K PSJ4N5 M447V ASQ SJ Q 3O M S5R47 PSJ4N5 M447V ASQ SJ Q Q S5R48 PSJ4N5 M447V ASQ SJ Q QM S5R4L PSJ4N5 M447V ASQ SJ Q HB A S5 45 PSJ4RL4M445 ASQ SJ Q OJB SJ ST554K P6 4L 8M445 S6J T B ST55KK P6 47KLM445 S6J T B SU57L5 B...

Page 39: ...No 51918 AV 14F71 38 REMOTE CONTROL UNIT REMOTE CONTROL UNIT PARTS LIST RM C364GY 1H 01 0 2 5 KLM55N T C6 B F O3B 1 ...

Page 40: ... 01 0 2 5 II5444RM45R6MB 6 U I 6SB K 54 77M44KCMQ ASQ O 6SSF 81 02 5 7 II74477M44K6MB O F C6I 8 HM 7NRIFM5Q BHO O A L II74478M4456MB O F C6I N 547KM4456 S COOU R B6C44LM44695 H6 Q I CO H7L 8RM44CMQ O 6 B 6 II8445LM4456MB SB 6 6CB 9 4 2 2 3 1 5 6 7 8 ...

Page 41: ...1918 Nov 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN LTD AV 14F71 VT AV 14F71 NOTE ON USING CIRCUIT DIAGRAMS SEMICONDUCTOR SHAPES BLOCK DIAGRAM CIRCUIT DIAGRAMS PATTERN DIAGRAMS 2 1 2 2 2 3 2 5 2 9 CD ROM No SML200111 BASIC CHASSIS CG CONTENTS ...

Page 42: ...rent in the GND The difference of the GND is shown by the LIVE side GND and the ISOLATED 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 ...

Page 43: ... OUT DY V DY H DEF YOKE H OUT V OUT H OUT V OUT 42 46 SCL SDA POWER SW IN OUT AC IN Q103 SW HEAD PHONE CF901 30 31 32 SAW EXT RGB TU001 TUNER IF T921 SW TRANSF IC921 POWER REG PC921 VOLTAGE FEEDBACK IC941 ERROR AMP IC971 5 9V REG REG D901 RECT R G B V01 CRT CRT SOCKET PWB RGB DRV ECO REMOCON KEY IND VIDEO AUDIO T522 HVT FOCUS SCREEN EHV B1 SP 18 19 3 58 OTH 25 37 38 6 7 8 VIDEO IN VIDEO OUT AUDIO ...

Page 44: ...AV 14F71 AV 14F71 No 51918 No 51918 2 5 2 6 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM 1 2 MAIN PWB SCG 1279A CK AT24C08 21DTT2 MEMORY 2W 220 220 220 220 16 X X X BW QAS0054 001 PIC 28143SY ...

Page 45: ... AC250V 1W ITC 2 2 1 4W 114 5V TP E TP 91 B1 18 250V MPP QFZ0199 184 18 250V MPP QFZ0199 184 0075 1 5KVH QFZ0200 752 MPP QQH0072 001 A34JLL91X84 CELD025 005J6 QQR1095 002 X 4 7 7W QRF074K 4R7 UNFR 100 4 4 1 12 6 8K 47K 1 8K QSK0061 002 10p 01 0027 3 9 3 9 X 560 X X QQR1005 003 QQLZ018 670 68 X 270 X 4 7K 1 8K 2 7K 2 7 5 6K R582 27K 1 10W NRSA02J 273X 0 2SC4722 NP QCZ9082 222Z QCZ9082 222Z QCZ9082 ...

Page 46: ...AV 14F71 AV 14F71 No 51918 No 51918 2 9 2 10 PATTERN DIAGRAMS MAIN PWB CRT SOKET PWB PATTERN 82 2 FRONT TP 91 B1 TP E TOP CRT SOCKET PWB MAIN PWB ...

Page 47: ...Printed in Japan VP 0111 DP6060 VICTOR COMPANY OF JAPAN LIMITED HOME AV NETWORK BUSINESS UNIT 12 3 chome Moriya cho Kanagawa ku Yokohama Kanagawa prefecture 221 8528 Japan AV14F71VT H 999 ...

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