JVC AV-14AG16/U Service Manual
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JVC AV-14AG16/U Service Manual

JVC AV-14AG16/U Service Manual

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SERVICE MANUAL
6
2006
YA392
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
COLOUR TELEVISION
AV-14AG16

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COPYRIGHT © 2006 Victor Company of Japan, Limited
/U
BASIC CHASSIS
CG4
No.YA392
2006/6

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  • Page 1: Table Of Contents

    SERVICE MANUAL COLOUR TELEVISION YA392 2006 AV-14AG16 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Items Contents Dimensions (W × H × D) 36.4 cm × 33.4 cm × 37.4 cm Mass 9 kg TV RF System B/G, I, D/K, M Colour System SECAM NTSC 3.58 / NTSC 4.43 Receiving VHF Low 46.25 MHz to 140.25 MHz Frequency VHF High 147.25 MHz to 423.25 MHz...

  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (8) When service is required, observe the original lead dress. many circuits and components specially for safety Extra precaution should be given to assure correct lead purposes.

  • Page 4: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES PICTURE MODE CHILD LOCK This function can adjust the picture settings automatically. Use this function to prevent children from operating the TV There are BRIGHT, STANDARD and SOFT in the PICTURE without parental consent. MODE.

  • Page 5: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER • Unplug the power cord. (1) Remove the 4 screws [A], 1 screw [B] and 1 screw [C] as shown in Fig.1. (2) Withdraw the REAR COVER toward you. CAUTION: When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR COVER groove.
  • Page 6 FRONT CABINET CRT SOCKET PWB (Within MAIN PWB) SPEAKER SPEAKER HOLDER MAIN PWB POWER CORD REAR COVER Fig.1 1-6 (No.YA392)
  • Page 7 MEMORY IC REPLACEMENT • This model uses the memory IC. • This memory IC stores data for proper operation of the video and drive circuits. • When replacing, be sure to use an IC containing this (initial value) data. 3.2.1 MEMORY IC REPLACEMENT PROCEDURE 1.
  • Page 8 3.2.2 SETTINGS OF FACTORY SHIPMENT 3.2.2.1 BUTTON OPERATION 3.2.3 SYSTEM CONSTANT SETTING Setting item Setting position Setting item Setting value POWER COLOUR MULTI CHANNEL BILINGUAL VOLUME TUNER ECO SENSOR 3.2.2.2 REMOTE CONTROL DIRECT OPERATION LANGUAGE E / R / A / P Setting item Setting position B/B SOUND...
  • Page 9 3.2.4 SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value 2. V/C 1.CUT OFF 5. PRESET Colour System 1. C-TRAP FIX 2.DRIVE [Do not adjust] 2. SHARP PEAK 3.BRIGHT 3. ABL 4.CONT. 4. GAMMA 5.COLOUR 5. Y. DELAY TIME 6.TINT 6.
  • Page 10 REPLACEMENT OF CHIP COMPONENT 3.3.1 CAUTIONS (1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it. 3.3.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.

  • Page 11: Adjustment

    SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION MEASURING INSTRUMENT AND FIXTURES (1) There are 2 ways of adjusting this TV : One is with the (1) DC voltmeter (or digital voltmeter) REMOTE CONTROL UNIT and the other is the (2) Oscilloscope conventional method using adjustment parts and (3) Signal generator components.

  • Page 12: Main Pwb

    ADJUSTMENT LOCATIONS CRT SOCKET PWB (SOLDER SIDE) TP-47G/R TP-47B TP-E CRT EARTH WIRE (BRAIDED ASS'Y) FRONT F901 IC702 IC701 MEMORY IC IC301 TU001 MAIN PWB 1Pin TP-91(B1) UPPER:FOCUS 2Pin NC LOWER:SCREEN 3Pin X-ray1 4Pin X-ray2 5Pin TP-E( ) 1-12 (No.YA392)
  • Page 13 BASIC OPERATION OF SERVICE MENU 4.6.1 TOOL OF SERVICE MENU OPERATION Operate the SERVICE MENU with the REMOTE CONTROL UNIT. 4.6.2 SERVICE MENU ITEMS With the SERVICE MENU, various adjustments can be made, and they are broadly classified in the following items of settings. 1.IF Adjustment of the IF circuits.
  • Page 14 (1) By pressing the [6] key, you can change the ON or OFF [should be OFF]. Should be OFF: If it is ON, when you turn off the power and turn on a power again, the JVC’s logo will be shown about 15 seconds automatically, and the SETUP TOUR starts.
  • Page 15 4.6.8 SERVICE MENU FLOW CHART SERVICE MENU 1. IF VCO (CW) ***.** TOO HIGH SERVICE MENU ABOVE REFERENCE 1.IF 2.V/C JUST REFERENCE 3.DEF 4.VSM PRESET BELOW REFERENCE 1. VCO 5.PRESET TOO LOW 6.SETUP TOUR OFF AFT ADJUST 2. DELAY POINT VCO ADJUST 1-6 : SELECT DISP : EXIT...

  • Page 16: No.ya392)1

    INITIAL SETTING VALUE OF SERVICE MENU • Adjustment of the SERVICE MENU is made on the basis of the initial setting values ; however, the new setting values which set the screen in its optimum condition may differ from the initial setting. •...
  • Page 17 [5. PRESET] The items in the following table, it is no requirement for adjustment.If values had changed by the miss operation, set the initial setting values in the following table. COLOUR SYSTEM (Do not adjust) Initial setting value (Fixed value) Setting item Variable range SECAM...
  • Page 18 ADJUSTMENT PROCEDURE 4.8.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument B1 VOLTAGE Signal TP-B1 : 1-pin (1) Receive a whole black signal. generator TP-E : 5-pin (2) Connect a DC voltmeter to 1-pin and 5-pin of S1 (S1 connector) connector.
  • Page 19 Measuring Item Test point Adjustment part Description instrument DELAY POINT Signal [1. IF] (1) Receive a black and white signal (colour off). (AGC) generator 2. DELAY POINT (2) Select 1. IF. (AGC TAKE-OVER) (3) Select < 2. DELAY POINT >. Remote (4) Set the setting values of the setting items as shown control unit...
  • Page 20 4.8.4 DEFLECTION CIRCUIT • There are 2 modes of adjustment (setting value) 50Hz mode and 60Hz mode, depending upon the kind of signals (vertical frequency 50Hz / 60Hz). • When adjusted in 50Hz mode and 60Hz mode will be automatically set. The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 21 4.8.5 VIDEO CIRCUIT The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting 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 items not listed in "ADJUSTMENT PROCEDURE".
  • Page 22 (3) Adjust NTSC 3.58 COLOUR to bring the value of (A) in the voltage table. NTSC 4.43 COLOUR Voltage setting (A) (1) When NTSC 3.58 is set, NTSC 4.43 will be MODEL SECAM NTSC3.58 NTSC4.43 automatically set at the respective values. AV-14AG16/U 1-22 (No.YA392)
  • Page 23 NTSC 4.43 TINT (1) When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values. Voltage setting (B) MODEL NTSC3.58 NTSC4.43 AV-14AG16/U SECAM BLACK Signal [2. V/C] (1) Input a SECAM full field colour bar signal. OFFSET generator 7.

  • Page 24: Troubleshooting

    4.8.6 VSM PRESET SETTING Measuring Item Test point Adjustment part Description instrument VSM PRESET Remote [4. VSM PRESET] (1) Select 4. VSM PRESET from the SERVICE MENU. control unit TINT (2) Set the PICTURE MODE to BRIGHT. COLOUR (3) Select < TINT >. BRIGHT (4) Set the initial setting value of <...
  • Page 25 Victor Company of Japan, Limited CRT Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA392) Printed in Japan...
  • Page 26 1 Confirm which remote control you have ..3 INSTRUCTIONS 2 Inserting the batteries ........3 3 Connecting the aerial and external devices ... 4 Thank you for buying this JVC 4 Connecting the power cord ......6 colour television. 5 SETUP TOUR ..........6...

  • Page 27: Safety Precautions

    Safety precautions WARNING • To prevent fire or shock hazard, do not expose the TV to rain or moisture. CAUTION • Operate only from the power source indicated on the rear of the TV. • Avoid damaging the power cord and mains plug. When you unplug the TV, pull it out by the mains plug.

  • Page 28: Preparation

    Preparation 1 Confirm which remote control you have RM-C360GY POWER SYSTEM PICTURE COLOUR SOUND MODE TV/VIDEO TIMER CHANNEL RETURN - / -- SCAN DISPLAY MUTING MENU CHANNEL VOLUME REMOTE CONTROL UNIT RM-C360GY 2 Inserting the batteries Correctly insert two batteries, observing the , and .

  • Page 29: Connecting The Aerial And External Devices

    Preparation 3 Connecting the aerial and external devices • For further details, refer to the manuals provided with the devices you are connecting. • Connecting cables are not supplied. • The front and rear AUDIO/VIDEO input jacks are directly connected so that input to either jack is output through both.
  • Page 30 Preparation ■ Connecting other external devices To audio To video output output VIDEO AUDIO VCR (for playing) VCR (for recording) To audio To video input input • Illustration of AV-14FMG6B. Camcorder TV game To video To audio To video To audio output output output...

  • Page 31: Connecting The Power Cord

    Operate only from the power source indicated on the rear of the TV. 5 SETUP TOUR When the TV is first turned on it enters the SETUP TOUR mode, and the JVC logo is displayed. Follow the instructions on the on-screen display to perform the SETUP TOUR.

  • Page 32: Basic Operation

    Basic operation 1 Press the POWER button to turn your TV on. • If your TV does not turn on, press the POWER Main power button on the TV then press SYSTEM PICTURE the POWER button again. COLOUR SOUND MODE •...

  • Page 33: Remote Control Buttons And Functions

    Remote control buttons and functions In VIDEO mode: PICTURE MODE button AUTO SECAM You can select one of three picture adjustment settings as you like. NTSC3.58 NTSC4.43 Press this button to select a mode. AUTO: Automatic colour system selection. BRIGHT: Heightens contrast and sharpness.

  • Page 34: Display Button

    Remote control buttons and functions DISPLAY button CHANNEL SCAN button You can continuously display the current You can quickly view all TV channels channel number or VIDEO mode on the programmes that you can view on your screen. TV, and search for the programme you want to view.

  • Page 35: Using The Tv's Menus

    Using the TV’s menus This TV has a number of functions you can operate using the menus. To use all your TV’s functions fully, you need to understand how to use the menus. 2 Repeatedly press the MENU T buttons to display a desired menu.

  • Page 36: On Timer

    Using the TV’s menus When the time set for the ON TIMER ON TIMER function is reached: Your TV will automatically turn on and The TV automatically turns on and the tune into the channel you set after the channel set for the ON TIMER function is period of time you set.

  • Page 37: Vnr

    Using the TV’s menus CHILD LOCK (Video Noise Reduction) You can reduce the picture noise. You can disable the front control buttons of the TV. 1 Press MENU T to display the When this function is set to “ON”, the TV “MENU 1”...

  • Page 38: Setup Tour

    EXIT BY 2 Press MENU M. OPERATE BY -+ D I SPLA Y JVC logo is appear and the SETUP 2 Press MENU M to start the AUTO TOUR function will start. CH PRESET function. For details, see page 6.

  • Page 39: Manual Ch Preset

    Using the TV’s menus If the picture is not clear: MANUAL CH PRESET Fine-tune the TV channel. You can manually preset desired TV channels to desired channels. 1 Press MENU t to select “FINE”. 1 Press MENU T to display the MANUAL FINE “MENU 3”...

  • Page 40: Skip

    Using the TV’s menus SKIP Picture Adjustments You can set undesired channels to be You can adjust the picture as you like. skipped. Channels set to be skipped 1 Press MENU T to display the cannot be selected by the CHANNEL m “MENU 4”...

  • Page 41: Using The Buttons On The Tv

    Using the buttons on the TV The following illustrations are of only some models are shown for explanation purpose only. Your TV may not be exactly the same as illustrated. <AV-14AG16> 1 MENU button MENU CHANNEL VOLUME POWER / • MENU button ON TIMER 2 CHANNEL m buttons...
  • Page 42 Using the buttons on the TV Basic operation Operating menus • Check to make sure the CHILD LOCK You can operate functions in menus using function is set to “OFF”. When the CHILD the front control buttons on the TV. LOCK function is set to “ON”, the TV cannot 1 Press MENU y to display a menu.

  • Page 43: Troubleshooting

    Troubleshooting If there is no picture or the TV does not operate normally, make sure the problem isn’t due to the reasons indicated below. If the problem persists even after taking the measures indicated, please contact a service technician. Poor picture Cannot turn the TV on •...

  • Page 44: Specifications

    Specifications TV RF systems B, G, I, D, K, K1, M Colour systems PAL, SECAM, NTSC 3.58 MHz/NTSC 4.43 MHz Receiving channels VHF low channel (VL), VHF high channel (VH), UHF channel (U) Receives cable channels in mid band, super band and hyper band. External input / output INPUT: VIDEO input (RCA), AUDIO input (RCA)
  • Page 46 SCHEMATIC DIAGRAMS COLOUR TELEVISION YA391 2006 AV-14AG16 BASIC CHASSIS CD-ROM No.SML200606 No.YA392 COPYRIGHT © 2006 Victor Company of Japan, Limited 2006/6...

  • Page 47: Standard Circuit Diagram

    AV-14AG16 STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY Type No indication : Ceramic capacitor The components identified by the symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety ciritical : Polypropylene capacitor components only with manufactures recommended parts.
  • Page 48 MAIN PWB CIRCUIT DIAGRAM (2/3)(3/3) ....................2-7 PATTERN DIAGRAMS .................2-9 MAIN PWB PATTERN ..........................2-9 VOLTAGE CHARTS ................... 2-11 WAVEFORMS .................... 2-12 USING P.W. BOARD PWB ASS'Y name AV-14AG16/U MAIN P.W.BOARD SCG-1556A-H2 SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW FRONT VIEW TOP VIEW...

  • Page 49: Block Diagram

    BLOCK DIAGRAM MAIN PWB(1/3, 2/3) POWER LED STB_PW IC703 5V REG.& RESET TIMER LED SF102 TU001 Q102 LED(TIM) IF AMP SAW FILTER TUNER REMOCON REMOCON RECEIVER SCL/SDA HEADPHONE IC651 SPEAKER L AUDIO AMP AUDIO OUT SCL/SDA SCL/SDA SPEAKER R IC701 IC702 MAIN PWB(3/3) MEMORY...

  • Page 50: Circuit Diagrams

    Q161 .047/25 0.47/50 10/50 R308 R322 1.8k R161 2.7k R165 CF161 CF162 R166 C165 IC301 NN5198K DECODE MAIN PWB ASS'Y (1/3) SCG-1556A-H2 [AV-14AG16/U] TU001 C119 QAU0246-002 .47/50 C120 SCL1 R301 120p C303 C304 C117 J004 .47/50 C305 C301 AUDIO C341 .47/50...

  • Page 51: Main Pwb Circuit Diagram (1/3)

    MAIN PWB ASS'Y (3/3) QJL001-042616 1/2W C430 G2SBA60 D427 H004 K421 .0047 C978 C979 MTZJ27B-T2 (CRT SOCKET) R453 220/25 220/10 2.7k SCG-1556A-H2 [AV-14AG16/U] C929 D425 R440 QRG01GJ-221 QFKA2JK-103 C905 Q401 C429 .001 R923 DTC124ESA-T 10/50 QCZ9054-102 R928 QRZ0237-R18 V.NECK CN00U...

  • Page 52: Pattern Diagrams

    PATTERN DIAGRAMS MAIN PWB PATTERN R573 Y001 C925 D921 Y002 R574 R983 D925 Q981 J002 W543 R575 R802 C842 C571 C008 FRONT R982 Q804 C926 W012 W023 R004 R807 R815 C924 R003 R929 C942 C981 R811 W436 D001 R002 C812 W579 T921 W580...

  • Page 53: Voltage Charts

    VOLTAGE CHARTS <MAIN PWB> <CRT SOCKET PWB> MODE MODE MODE MODE DC ( V ) DC ( V ) DC ( V ) DC ( V ) PIN NO. PIN NO. PIN NO. PIN NO. IC301 Q651 Q351 125.8 Q652 Q352 123.3 Q653...

  • Page 54: Waveforms

    WAVEFORMS -MAIN PWB- (SHEET1) IC301-10 IC301-11 IC301-12 IC301-14 IC301-36 IC301-40 IC301-42 (1µs) (1µs) 3.5 Vp-p 3.5 Vp-p 4.0 Vp-p 0.35 Vp-p 3.0 Vp-p 0.5 Vp-p 2.5 Vp-p IC301-46 IC701-27 IC701-35 5.0 Vp-p 5.0 Vp-p 2.5 Vp-p (SHEET2) IC421-1 IC421-3 IC421-5 IC421-6 Q521-C Q521-B...
  • Page 55 Victor Company of Japan, Limited CRT Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA392) Printed in Japan...

  • Page 56: Parts List

    PARTS LIST CAUTION The parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the  safety. The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. P.W.
  • Page 57 CONTENTS USING P.W. BOARD & REMOTE CONTROL UNIT ....................3-3 EXPLODED VIEW PARTS LIST -1 ..........................3-3 EXPLODED VIEW -1 ..............................3-4 PRINTED WIRING BOARD PARTS LIST ........................3-5 MAIN P.W. BOARD ASS'Y (SCG-1556A-H2) ....................3-5 REMOTE CONTROL UNIT PARTS LIST (RM-C360GY-1H) ..................3-8 PACKING ..................................

  • Page 58: Using P.w. Board & Remote Control Unit

    USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-14AG16/U MAIN P.W.B SCG-1556A-H2 REMOTE CONTROL UNIT RM-C360GY-1H EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local  V01 A34JXV70X03BN40  L01 QQW0171-001 DEG COIL  T522...

  • Page 59: Exploded View -1

    EXPLODED VIEW -1 CRT SOCKET PWB (Within MAIN PWB) T522 MAIN PWB RATING LABEL 3-4(No.YA392)

  • Page 60: Printed Wiring Board Parts List

    PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SCG-1556A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D941 RU3AM-LFC4 SI DIODE D942 ERC30-02L38E SI DIODE IC301 NN5198K D943 FR105GT-T3 SI DIODE IC421 LA78040N D982...
  • Page 61 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C526 QFLC1HJ-103Z M CAPACITOR 0.01uF 50V J R112 NRSA63J-220X MG RESISTOR 22Ω 1/16W J C527 QFZ0197-684 MPP CAPACITOR 0.68uF 250V J R113 NRSA63J-101X MG RESISTOR 100Ω...
  • Page 62 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R581 QRE121J-182Y C RESISTOR 1.8kΩ 1/2W J R991 QRZ9046-825Z C RESISTOR 8.2MΩ 1/2W K R582 NRSA63J-273X MG RESISTOR 27kΩ 1/16W J R583 NRSA63J-393X MG RESISTOR 39kΩ...

  • Page 63: Remote Control Unit Parts List (Rm-C360Gy-1H)

    REMOTE CONTROL UNIT PARTS LIST (RM-C360GY-1H)  Ref No. Part No. Part Name Description Local R25-8567 BATTERY COVER PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local GG10281-010A-H PACKING CASE LC10166-003B-H CUSHION ASS'Y 4pcs in 1set GG30097-002A-H POLY BAG GG30096-001A-H POLY BAG...

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