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JVC AV-21BX16/L Schematic Diagrams

Jvc flat colour television schematic diagrams.
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SCHEMATIC DIAGRAMS
FLAT COLOUR TELEVISION
AV-21BX16
/L
CD-ROM No.SML200609
BASIC CHASSIS
CW3
No.YA465
COPYRIGHT © 2006 Victor Company of Japan, Limited.
2006/9

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Table Of Contents

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   Summary of Contents for JVC AV-21BX16/L

  • Page 1

    SCHEMATIC DIAGRAMS FLAT COLOUR TELEVISION AV-21BX16 CD-ROM No.SML200609 BASIC CHASSIS No.YA465 COPYRIGHT © 2006 Victor Company of Japan, Limited. 2006/9...

  • Page 2

    SERVICE MANUAL FLAT COLOUR TELEVISION YA465 2006 AV-21BX16 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .

  • Page 3

    SPECIFICATION Items Contents Dimensions (W 59.8 cm 47.6 cm 47.7 cm Mass 22.0 kg TV RF System B, G, I, D, K, M Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43 Stereo System PB STREO Teletext System Receiving VHF Low 46.25MHz - 140.25MHz (AS0 - S6) Frequency...

  • Page 4: 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 5: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES DVD PICTURE MODE This function can enhance the picture quality of DVD. The screen can be made sharp or soft by this setting. AUTO SIGNAL DETECT When input DVD signal to VIDEO-2, detect the input signal and change the input mode to VIDEO-2 automatically.

  • Page 6

    TECHNINAL INFORMATION 2.2.1 MAIN MI-COM (CPU) PIN FUNCTION Pin name Function Pin name Function VssP2 Not used VssC4 FbiSo Flyback input/sandcastle output V1.8C4 1.8V (Digital) Hout Horizontal output V3.3A3 3.3V VssComb VrefP_Sdac 3.3V (Positive) V5Comb VrefN_Sdac Vin/R2/Pr PIP R input VrefP_Sdac 3.3V (Negative) Uin/B2/Pb...

  • Page 7: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER • Unplug the power cord. (1) Remove the 7 screws [A], and 2 screws [B]. (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 8

    FRONT CABINET SPEAKER CRT SOCKET PWB (Within MAIN PWB) FRONT LED PWB (Within MAIN PWB) POWER CORD SPEAKER MAIN PWB REAR COVER Fig.1 (No.YA465)1-7...

  • Page 9

    MEMORY IC REPLACEMENT • This model uses the memory IC. Memory IC: IC702 on MAIN PWB The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in "PRINTED WIRING BOARD PARTS LIST".

  • Page 10

    3.2.2 SYSTEM CONSTANT SETTING 3.2.3.3 REMOTE CONTROL MENU OPERATION Setting item Setting value (1) PICTURE SETTING SYSTEM MULTI Setting item Setting position COMB PICTURE MODE BRIGHT TILT CONTRAST / BRIGHT / SHARP Centre SUPER BASS / COLOUR / TINT TEXT WHITE BALANCE COOL LANGUAGE...

  • Page 11

    3.2.4 SERVICE MODE SETTING ITEMS Setting item Setting value 1. IF 1. VCO 2. DELAY POINT 2. V / C 1. SCREEN 2. CUTOFF(B/G) 3. WDR(R/G/B) 4. BRIGHT(TV/VDO 1/2/3) 5. CONT(TV/VDO 1/2/3) 6. COLOUR (TV/VDO1/2/3) 7. TINT(TV/VDO 1/2/3) 8. SHARP [Do not adjust] 9.

  • Page 12

    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 13: 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) HV voltmeter components.

  • Page 14

    ADJUSTMENT LOCATION MAIN PWB ASS'Y FRONT (FRONT LED) CN10A S804 S802 J808 J807 J806 J809 S805 S803 S801 POWER SW CN00A FRONT S901 CN00S POWER CORD IC702 DEG COIL IC701 YOKE J801 J802 J803 J804 CN00C MAIN PWB ASS'Y CN00B CN00C CN00B TU001...

  • Page 15

    BASIC OPERATION OF SERVICE MODE 4.6.1 TOOL OF SERVICE MODE OPERATION Operate the SERVICE MODE with the REMOTE CONTROL UNIT. 4.6.2 SERVICE MODE ITEMS With the SERVICE MODE, various adjustments can be made, and they are broadly classified in the following items of settings. 1.IF This mode adjusts the setting values of the IF circuit.

  • Page 16

    4.6.4 SERVICE MODE FLOW CHART 1. IF SERVICE MENU SERVICE MENU IF SERVICE MENU 1. IF 2. V/C VCO (CW) ***** 3. AUDIO 4. DEF TOO HIGH 5. VSM W/B 6. STATUS 1. VCO ABOVE REFERENCE 7. PLUG & PLAY (ON) JUST REFERENCE 2.

  • Page 17

    INITIAL SETTING VALUE OF SERVICE MODE (1) Adjustment of the SERVICE MODE 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 value. (2) Do not change the initial setting values of the setting items not listed in "ADJUSTMENT PROCEDURE".

  • Page 18

    [3. AUDIO] *This submenu is for display only, no adjustment is required. Function Item Setting value AUDIO 1. DC XO ADJ 12H* 2. NICAM LOWER ERR LIM 3. NICAM UPPER ERR LIM 4. A2 ID THR Function MODE Item 100Hz 300Hz 1kHz 3kHz...

  • Page 19

    [5. VSM W/B] Setting value Variable Setting item range BRIGHT SOFT STANDARD THEATER 1. BRIGHT -16 - 16 2. CONT -16 - 16 3. COLOUR -16 - 16 4. SHARP -16 - 16 5. HUE -16 - 16 Setting value Variable Setting item range...

  • Page 20

    4.8.2 TUNER / IF CIRCUIT 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 from the SERVICE MODE (AGC TAKE-OVER) (3) Select <2.

  • Page 21

    Measuring Item Test point Adjustment part Description instrument V. POSITION Signal [4. DEF] PAL V. POSITION generator 1. V-SHIFT (1) Receive a circle pattern signal of vertical frequency 50Hz (PAL). Remote (2) Select 4. DEF from the SERVICE MODE. control unit (3) Select <1.

  • Page 22

    Measuring Item Test point Adjustment part Description instrument V.LINEARITY Signal [4. DEF] PAL V. LINEARITY generator 12. V-S. CR (1) Receive a PAL crosshatch signal. 13. V-LIN (2) Select 4. DEF from the SERVICE MODE. Remote (3) Select <12. V-S.CR>. control unit (4) Set the initial setting value of <12.

  • Page 23

    COMPRESS : ON (16:9) Measuring Item Test point Adjustment part Description instrument V. SIZE Signal [4.DEF] PAL V. SIZE generator 14. V. ZOOM (1) Receive a circle pattern signal of vertical frequency 3. V-SIZE 50Hz (PAL). Remote (2) Set the COMPRESS(16 : 9) to ON. control unit (3) Select 4.

  • Page 24

    VIDEO - 2 SET: COMPONENT Measuring Item Test point Adjustment part Description instrument H. POSITION Signal [4. DEF] (1) Receive a PAL circle pattern signal to VIDEO-2 generator 4. H-CENT component terminal. (2) Select VIDEO-2 SET from the MENU and set Remote VIDEO-2 SET to COMPONENT.

  • Page 25

    Measuring Item Test point Adjustment part Description instrument SUB BRIGHT Remote [2. V/C] (1) Receive a NTSC broadcast. control unit 4. BRIGHT (2) Set the PICTURE MODE to BRIGHT. (3) Select 2. V/C from the SERVICE MODE. (4) Select <4. BRIGHT>. (5) Set the initial setting value of <4.

  • Page 26

    Measuring Item Test point Adjustment part Description instrument SUB TINT Remote [2. V/C] [Method of adjustment without measuring instrument] control unit 7. TINT PAL TINT (1) Receive a PAL broadcast. (2) Set the PICTURE MODE to BRIGHT. (3) Select 2. V/C from the SERVICE MODE. (4) Select <7.

  • Page 27

    4.8.6 VSM PRESET SETTING Measuring Item Test point Adjustment part Description instrument VSM PRESET Remote [5.VSM W/B] (1) Select 5.VSM W/B from the SERVICE MODE. control unit 1. BRIGHT (2) Select the BRIGHT with the [OK] key. 2. CONT (3) Adjust the [MENU / ] key to bring the set values 3.

  • Page 28

    4.8.7 PURITY AND CONVERGENCE PURITY ADJUSTMENT NOTE: The final adjustment of CONVERGENCE must be done after WEDGE DEFLECTION the FOCUS adjustment. (CONVERGENCE is changed by YOKE FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment. (1) Demagnetize CRT with the demagnetizer. P / C (2) Loosen the retainer screw of the deflection yoke.

  • Page 29

    STATIC CONVERGENCE ADJUSTMENT (1) Input a crosshatch signal. (2) Using 4-pole convergence magnets, overlap the red and blue lines in the centre of the screen (Fig.1) and turn them (FRONT VIEW) to magenta (red/blue). (3) Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the centre of the screen and turn them to white.

  • Page 30: Troubleshooting

    SECTION 5 TROUBLESHOOTING SELF CHECK FUNCTIONS 5.1.1 OUTLINE This model has self check functions given below. When an abnormality has been detected, the SUB POWER is turned off and POWER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer.

  • Page 31

    AV-21BX16 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 32: Table Of Contents

    MAIN PWB CIRCUIT DIAGRAM (3/4) (4/4) ....................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-21BX16/L MAIN P.W. BOARD SCW-1952A-H2 SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW FRONT VIEW...

  • Page 33: Block Diagram

    BLOCK DIAGRAM MAIN PWB IC701 MAIN MICRO COMPUTER/ IF VIDEO RGB SYNC DEF. PROCESS IC351 108,109 SCL1, SDA1 RGB OUT I 2 C 127,128 SCL0, SDA0 IC702 MICRO MAIN MEMORY COMPUTER DIGITAL SIGNAL PROCESS TU001 98,99 TUNER REMOTE PORT KEY_IN CRT SOCKET PEAKING SCAN ROUT...

  • Page 34: Circuit Diagrams

    CIRCUIT DIAGRAMS MAIN PWB (4/4) SHEET2 ADJUSTMENT MAIN PWB CIRCUIT DIAGRAM (1/4), (2/4) SHEET1 CONNECTOR MAIN PWB ASS'Y(2/4) [FRONT LED] (CRT SOCKET) CN10T SCW-1952A-H2 VIDEO-3 CN00C CN00T QGA2501F1-06 QJL001-064431-E INPUT IC801 GP1UE281QKVF IC302 REMOTECON RECEIVER D808 J806 C806 LH22440-T16 QNN0281-003 C808 100/16 J807...

  • Page 35

    MAIN PWB CIRCUIT DIAGRAM (3/4), (4/4) SHEET2 MAIN PWB (1/4) SHEET1 IC351 TDA6107AJF/N1 RY901 F901 QSK0061-002 QMF51E2-4R0-S 3.3V_STB D956 C966 VA901 R910 100/16 CN0PW QAF0060-621 R963 R358 SK351 QRZ0107-474Z C910 C964 QRZ0107-152Z QFZ9072-224 QNZ0536-002 Q955 S901 QSW0846-001 R964 R359 AC110V-AC240V IC971 QRZ0107-152Z 50Hz/60Hz...

  • Page 36: Pattern Diagrams

    PATTERN DIAGRAMS MAIN PWB PATTERN FRONT J806 R822 C806 S801 S802 S803 S804 S805 Y814 R824 J809 R825 C807 CN00A D814 R961 W-E1 CN10A CN0E3 W102 R633 R632 S901 W011 R520 CN0E1 L304 CN00S Y809 C831 IP37 C304 R309 R981 R982 C306 R312...

  • Page 37: Voltage Charts

    VOLTAGE CHARTS <MAIN PWB> <MAIN PWB> (FRONT LED) (CRT SOCKET) <MAIN PWB> MODE MODE MODE MODE MODE MODE DC ( V ) DC ( V ) DC ( V ) DC ( V ) DC ( V ) DC ( V ) PIN NO.

  • Page 38: Waveforms

    WAVEFORMS -MAIN PWB- IC401-7 IC401-1 IC401-3 IC401-5 IC401-6 27Vp-p 30Vp-p 0.8Vp-p 1.0Vp-p 53Vp-p IC701-10 IC701-11 IC701-22 IC701-23 IC701-48 IC701-66 IC701-67 (0.2µs) (0.2µs) 2.3Vp-p 2.7Vp-p 1.0Vp-p 1.3Vp-p 2.0Vp-p 5.0Vp-p 3.0Vp-p IC701-74 IC701-85 IC701-86 IC701-87 1.2Vp-p 1.4Vp-p 1.4Vp-p 1.7Vp-p T522-2 T522-4 T522-6 T522-7 T522-8 T522-9...

  • Page 39: 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 40

    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 (SCW-1952A-H2) ....................3-5 REMOTE CONTROL UNIT PARTS LIST (RM-C1286-1H) ..................3-9 PACKING ..................................

  • Page 41: Using P.w. Board & Remote Control Unit

    USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-21BX16/L MAIN P.W.B SCW-1952A-H2 REMOTE CONTROL UNIT RM-C1286-1H EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local  V01 A51QDJ420X PICTURE TUBE  DY01 QQD0136-001 DEF YOKE ...

  • Page 42: Exploded View -1

    EXPLODED VIEW -1 DY01 CRT SOCKET PWB (Within MAIN PWB) FRONT LED PWB T522 (Within MAIN PWB) MAIN PWB RATING LABEL 3-4(No.YA465)

  • Page 43: Printed Wiring Board Parts List

    PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SCW-1952A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D554 MA8051/L/-X Z DIODE D571 MA8075/H/-X Z DIODE IC351 TDA6107AJF/N1 D581 FR105GT-T3 SI DIODE IC401 LA78040N D603...

  • Page 44

    Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C427 QETN1VM-108Z E CAPACITOR 1000uF 35V M C754 NCB31CK-104X C CAPACITOR 0.1uF 16V K C428 QETN1VM-227Z E CAPACITOR 220uF 35V M C755 QETN1CM-227Z E CAPACITOR 220uF 16V M C430 QFLC2AJ-563Z...

  • Page 45

    Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R102 NRSA63J-682X MG RESISTOR 6.8k 1/16W J R707 NRSA63J-223X MG RESISTOR 22k 1/16W J R103 NRSA63J-272X MG RESISTOR 2.7k 1/16W J R708 NRSA63J-103X MG RESISTOR 10k 1/16W J R104 NRSA63J-181X...

  • Page 46

    Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R815 NRSA63J-750X MG RESISTOR 75 1/16W J S805 QSW0619-003Z PUSH SWITCH VOL+ R816 NRSA63J-750X MG RESISTOR 75 1/16W J QSW0846-001 PUSH SWITCH POWER S901 R818 NRSA63J-181X MG RESISTOR...

  • Page 47: Remote Control Unit Parts List (rm-c1286-1h)

    REMOTE CONTROL UNIT PARTS LIST (RM-C1286-1H)  Ref No. Part No. Part Name Description Local R25-8566 BATTERY COVER PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local GG10285-012A-H PACKING CASE GG10422-001A-H CUSHION ASS'Y 5pcs in 1set GG30097-003B-H POLY BAG GG30096-001B-H POLY BAG...

  • Page 48

    Victor Company of Japan, Limited Display Category 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama-city, kanagawa-prefecture, 221-8528, Japan (No.YA465) Printed in Japan...

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