SERVICE MANUAL COLOR TELEVISION YA052 2004 AV-20F475 AV-N21F45 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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SPECIFICATION Items Contents Dimensions ( W × H × D ) 66.7cm × 47.7cm × 50.5cm (26-1/4" × 18-13/16" × 19-7/8") Mass 25kg (55lbs) TV RF System CCIR(M) Color System NTSC Sound System BTSC (Multi Channel Sound) TV Receiving Channels VHF Low 02ch~06ch : 54MHz~88MHz and Frequency...
SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, many replaced. Always manufacturer's replacement circuits and components specially for safety purposes. For components. continued protection, no changes should be made to the original (10) Isolation Check (Safety for Electrical Shock Hazard) design unless authorized in writing by the manufacturer.
It became legible from any position by CRT with few reflection healthy program. and reflect lumps on the flat screen. WORLD CLOCK [AV-20F475] COMPONENT INPUT The world clock feature provides time differences for some of Since the component signal input terminal is equipped, it the major cities around the world in real time.
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TECHNICAL INFORMATION 2.3.1 SYSTEM BLOCK DIAGRAM REMOCON REMOCON IC101 RECEIVER A F T 1 IC201 IF DET MAIN MI-COM / VIDEO PROCESS / IC702 S C L 1 DEF. PROCESS MEMORY S D A 1 SCL0 SDA0 S C L 0 S D A 0 S C L 0 S D A 0...
SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.4 CHECKING THE MAIN PWB (1) Unplug the power plug. To check the PW Board from back side. (2) Remove the 7 screws [A] as shown in the Fig.1. (1) Pull out the MAIN PWB (refer to REMOVING THE MAIN (3) Remove the 4 screws [B] as shown in the Fig.1.
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FRONT CABINET SPEAKER SPACER SPEAKER HOLDER CRT SOCKET PWB MAIN PWB (PWB STOPPER) REAR COVER POWER CORD Fig.1 (No.YA052)1-7...
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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 3.2.2 SERVICE MODE SETTING ITEMS 1.
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Setting item Setting position Setting item Setting position TINT SET CLOCK COLOR ON / OFF TIMER PICTURE WORLD CLOCK Refer to OPERATING INSTRUCTIONS [AV-20F475] BRIGHT DETAIL (4) INITIAL SETUP COLOR TEMPERRATURE HIGH Setting item Setting position NOISE MUTING LANGUAGE ENG. [AV-20F475] ESP.
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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.
SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION MEASURING INSTRUMENT AND FIXTURES (1) There are 2 ways of adjusting this TV : One is with the • DC voltmeter (or digital voltmeter) REMOTE CONTROL UNIT and the other is the • Oscilloscope conventional method using adjustment parts and •...
ADJUSTMENT LOCATIONS CRT SOCKET PWB (SOLDER SIDE) TP-B TP-E CRT EARTH (BRAIDED ASS'Y) FRONT MAIN PWB MEMORY IC SPEAKER F901 IC702 FUSE IC201 POWER CORD DEG. COIL TP-E(GND) T111 IC421 1: X-RAY R927 DOWN 2: GND S401 3: X-RAY V CENTER SW TP-91(B1) IC851 T521...
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BASIC OPERATION OF SERVICE MODE SUB MENU 7.LOW LIGHT SERVICE MENU 1.V/C(S) 2.DEF(D) 3.SOUND(A) 4.OTHERS(F) 5.3L Y/C(LYC) 7.LOW LIGHT 8.HIGH LIGHT 9.VCO 11.I2C BUS 12.SYSTEM(SYS) SELECT BY EXIT BY EXIT OPERATE BY BRIGHT 1.V/C(S) 8.HIGH LIGHT 4 : 3 BRIGHT 2.DEF(D) 9.VCO 4 : 3...
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4.6.1 TOOL OF SERVICE MODE OPERATION Operate the SERVICE MODE with the REMOTE CONTROL UNIT. 4.6.2 SERVICE MODE ITEMS In general, basic setting (adjustments) items or verifications are performed in the SERVICE MODE. 1. V/C (S) This sets the setting values of the VIDEO circuit. 2.
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4.6.6 SERVICE MODE SETTING 1. V/C(S), 2. DEF(D) 7. LOW LIGHT • Press [CH+] / [CH-] key The settings for LOW LIGHT is described in the WHITE For scrolling up/down the adjustment item. BALANCE page of ADJUSTMENT PROCEDURE. • Press [VOL+] / [VOL-] key NOTE: For scrolling up/down the data values.
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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. (2) Do not change the initial setting values of the setting items NOT LISTED IN ADJUSTMENT PROCEDURE.
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Initial setting value Setting Variable item range EXTERNAL (S / COMPOSITE) EXTERNAL (COMPONENT) ASY SHRP 0 ~ 7 BPF FØ 0 ~ 1 KILR OFF 0 ~ 1 KILR SEN 0 ~ 1 Setting Variable Initial setting value item range RGB MUTE 0 ~ 1 BLUE B...
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4.7.2 [2. DEF (D)] Initial setting value Setting Variable EXTERNAL item range 16:9 V FREQ 0 ~ 3 AFC GAIN 0 ~ 3 H POSI 0 ~ 31 H POSI+- -128 ~ +127 V PHASE 0 ~ 7 V PH+- -128 ~ +127 V SIZE 0 ~ 127...
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ADJUSTMENT PROCEDURE 4.8.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument B1 VOLTAGE Signal TP-91(R927) (1) Receive the black and white signal. (color off) generator TP-E (IC421 (2) Connect the DC voltmeter to the TP-E and TP-91. Heatsink) (3) Confirm that the voltage is DC134V±2V.
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4.8.4 DEFLECTION 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. Measuring Item Test point...
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Measuring Item Test point Adjustment part Description instrument H. SIZE / Signal [2.DEF (D)] • V. SIZE / V. POSITION adjustment should be finished. generator D03: H POSI (1) Receive a cross-hatch signal. H. POSITION / SIDE PIN D15: H SIZE (2) Select 2.DEF(D) from the SERVICE MODE.
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4.8.5 VIDEO CIRCUIT Measuring Item Test point Adjustment part Description instrument WHITE Signal [1.V/C (S)] (1) Receive the black and white signal ( color off ). generator S01: BRIGHT (2) Set the VIDEO STATUS to STANDARD. BALANCE (LOW LIGHT) S11: R CUTOFF (3) Set the COLOR TEMPERATURE to LOW.
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Measuring Item Test point Adjustment part Description instrument WHITE Signal [1.V/C (S)] (1) Receive the black-and-white signal (color off). generator S14: R DRIVE (2) Set the VIDEO STATUS to STANDARD. BALANCE (HIGH LIGHT) S15: B DRIVE (3) Set the COLOR TEMPERATURE to LOW. Remote (4) Select the 1.V/C (S) from the SERVICE MODE.
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4.8.6 MTS CIRCUIT Measuring Item Test point Adjustment part Description instrument MTS INPUT Remote [3.SOUND (A)] (1) Receive any broadcast. control unit A01: IN LEVEL (2) Select the 3.SOUND (A) from the SERVICE MODE. LEVEL (3) Select the < A01 > (IN LEVEL). (4) Set the initial setting value of the <...
SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. 1-26 (No.YA052)
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JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.YA052) Printed in Japan...
PARTS LIST CAUTION J 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. J The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. J P.W.
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EXPLODED VIEW -1 ..............................3-3 EXPLODED VIEW PARTS LIST -2 ..........................3-4 EXPLODED VIEW -2 ..............................3-5 PRINTED WIRING BOARD PARTS LIST [AV-20F475/S] MAIN P.W. BOARD ASS'Y (SFJ-1011A-M2) ..................... 3-6 PRINTED WIRING BOARD PARTS LIST [AV-N21F45/S] MAIN P.W. BOARD ASS'Y (SFJ-1012A-M2) ....................3-10 REMOTE CONTROL UNIT PARTS LIST (RM-C1258G-1H) ..................
EXPLODED VIEW PARTS LIST -1 Ref.No. Part No. Part Name Description Local LC32242-001A-A RC LENS CM48006-010-C JVC MARK GQ30025-002A-A CONTROL KNOB GQ10063-003B-A FRONT CABINET ASSY Inc.No.101-104 AV-20F475/S GQ10063-004A-A FRONT CABINET ASSY Inc.No.101-104 AV-N21F45/S GQ20006-001B-A DOOR CM48229-00A-C DOOR LATCH LC32240-001A-A POWER KNOB...
2m BLACK LC20106-001D-A POWER CORD CLAMP QYSBSFG4016Z TAP SCREW 4.0mm x 16mm(x7) QYSBSB3010Z TAP SCREW 3.0mm x 10mm(x4) GQ30032-001A-A RATING LABEL AV-20F475/S GQ20001-001A-A RATING LABEL AV-N21F45/S GQ30034-001B-A WARNING LABEL SFJ-1011A-M2 MAIN PWB Inc. CRT SOCKET PWB AV-20F475/S SFJ-1012A-M2 MAIN PWB Inc.
PRINTED WIRING BOARD PARTS LIST [AV-20F475 MAIN P.W. BOARD ASS'Y (SFJ-1011A-M2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D688 MTZJ9.1C-T2 Z DIODE D705 1SS133-T2 DIODE IC101 M52342FP-X D751 LG22440 POWER/ON TIMER...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C273 NCB31HK-103X C CAPACITOR 0.01uF 50V K C667 NCB31HK-472X C CAPACITOR 4700pF 50V K C274 NDC31HJ-181X C CAPACITOR 180pF 50V J C668 QENC1HM-475Z BP E CAPACITOR 4.7uF 50V M C275 QETN1EM-476Z...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R104 NRSA63J-180X MG RESISTOR 18Ω 1/16W J R402 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J R105 NRSA63J-270X MG RESISTOR 27Ω 1/16W J R403 NRSA63J-103X MG RESISTOR 10kΩ...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R718 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R943 QRE121J-820Y C RESISTOR 82Ω 1/2W J R720 QRJ149J-1R0 UNF C RESISTOR 1Ω 1/4W J R991 QRZ9041-275 C RESISTOR 2.7MΩ...
PRINTED WIRING BOARD PARTS LIST [AV-N21F45 Ref No. Part No. Part Name Description Local MAIN P.W. BOARD ASS'Y (SFJ-1012A-M2) Ref No. Part No. Part Name Description Local D687 MTZJ9.1C-T2 Z DIODE D688 MTZJ9.1C-T2 Z DIODE D705 1SS133-T2 DIODE IC101 M52342FP-X D751 LG22440 POWER/ON TIMER...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C272 NCB31HK-103X C CAPACITOR 0.01uF 50V K C666 NCB31HK-223X C CAPACITOR 0.022uF 50V K C273 NCB31HK-103X C CAPACITOR 0.01uF 50V K C667 NCB31HK-472X C CAPACITOR 4700pF 50V K C274 NDC31HJ-181X...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R104 NRSA63J-180X MG RESISTOR 18Ω 1/16W J R402 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J R105 NRSA63J-270X MG RESISTOR 27Ω 1/16W J R403 NRSA63J-103X MG RESISTOR 10kΩ...
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Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R718 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R943 QRE121J-820Y C RESISTOR 82Ω 1/2W J R720 QRJ149J-1R0 UNF C RESISTOR 1Ω 1/4W J R991 QRZ9041-275 C RESISTOR 2.7MΩ...
AV-20F475 AV-N21F45 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.
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CONTENTS SEMICONDUCTOR SHAPES ..............2-2 BLOCK DIAGRAM ..................2-3 CIRCUIT DIAGRAMS ..................2-5 MAIN PWB CIRCUIT DIAGRAM ........................ 2-5 PATTERN DIAGRAMS .................2-9 MAIN PWB PATTERN ..........................2-9 CHANNEL CHART (US) ................2-11 CHANNEL CHART (CA) ................2-12 USING P.W. BOARD PWB ASS'Y name AV-20FA475/S AV-N21F45/S MAIN P.W.
BLOCK DIAGRAM IC101 IC641 IF & DET MTS DECODE/AUDIO CONTROL TU001 AUDIO VOLUME IF AMP TUNER CONTROL DETECT DECODE SDA0 SCL0 TONE CONTROL LIMIT AMP SURROUND VIDEO DETECT EQ. AMP SDA0 SCL0 L3/R3 Y1/C1 INPUT 1 IC851 AV SW L1/R1 IC251 3-LINE Y/C SEP SDA0 SCL0...
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SPEAKER IC602 SPEAKER AUDIO OUT HEADPHONE AUDIO EXTL/EXTR MAIN PWB IC201 MICRO COMPUTER/CLOSED CAPTION DECODE/ VIDEO PROCESS/RGB PROCESS/ SYNC. SEP/DEF PROCESS Q301 B OUT Q311 CLOSED GENERATE R OUT CAPTION PROCESS DECODER Q321 G OUT BASE BAND PROCESS PROCESS Pb2/Pr2 CRT SOCKET CHROMA PROCESS...
CHANNEL CHART (CA) MODE CHANNEL MODE CHANNEL TUNER TUNER BAND BAND BAND BAND CATV REAL DISP. CATV REAL DISP. W+35 W+36 W+37 W+38 W+39 W+40 W+41 W+42 W+43 W+44 W+45 W+46 W+47 W+48 W+49 W+50 W+51 W+52 W+53 W+54 W+55 W+56 W+57 W+58...
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JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.YA052) Printed in Japan...