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COLOUR TELEVISION

AV-14F71
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COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
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AV-14F71
BASIC CHASSIS
CG
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No. 51918
Nov. 2001

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Summary of Contents for JVC AV-14F71/VT

  • Page 1: Table Of Contents

    AV-14F71 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS AV-14F71 CONTENTS ! SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2 ! SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ 3 ! FEATURES・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・ ・・・ ・・・...
  • Page 2: Specifications

    AV-14F71 SPECIFICATIONS ITEM CONTENT Dimensions(W×H×D) 462mm×340.5mm×375mm Mass 10kg TV RF System B/G, I, D/K, K1,M RF Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Colour System VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Picture Tube Visible size: 34cm measured diagonally High Voltage 22.5kV±1.5kV(at zero beam current) Receiving Frequency...
  • Page 3: Safety Precautions

    AV-14F71 SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many 9. Isolation Check circuits and components specially for safety purposes. For (Safety for Electrical Shock Hazard) continued protection, no changes should be made to the original After re-assembling the product, always perform an isolation design unless authorized in writing by the manufacturer.
  • Page 4: Features

    AV-14F71 FEATURES " New chassis design enables use of an interactive on-screen control. " Wide range voltage (110V ~ 240V) AC power input " With AUDIO / VIDEO INPUT & OUTPUT terminal. " MUTING button can reduce the audio level to zero instantly. "...
  • Page 5: Functions

    AV-14F71 FUNCTION ■ FRONT PANEL 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 HEADPHONE jack ⑩...
  • Page 6: Specific Service Instructions

    AV-14F71 SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE REAR COVER 1. Unplug the power plug. 2. As shown in figure, remove the 5 screws marked " " " " a screw marked 3. Withdraw the rear cover toward you. REMOVING THE MAIN PW BOARD "...
  • Page 7 AV-14F71 FRONT CABI. SPEAKER (× × × × 4) CRT SOCKET MAIN PWB POWER CORD REAR COVER (× × × × 1) (× × × × 5) No. 51918...
  • Page 8 AV-14F71 REPLACEMENT OF MEMORY ICs 1. MEMORY ICs This model uses memory ICs. This memory IC data are for proper operation of the video and deflection circuits. When replacing memory ICs, be sure to use ICs written with the initial values of data. 2.
  • Page 9 AV-14F71 SETTING OF SYSTEM CONSTANT SET Setting item Setting contents Setting value MULTI. TRIPLE MULTI COLOUR BILINGUAL TUNER ECO SENSOR LANGUAGE B/B SOUND ~ LOCK COLOUR AUTO MINT MQSS MINT TEXT RATE AMP TUNER TEXT TABLE Table 1 USER SETTING VALUES Setting item Setting value Setting item...
  • Page 10: Initial Setting Value Of Service Menu

    AV-14F71 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. Do not change the initial Setting Values of the Setting (Adjustment) items not listed In “ADJUSTMENT”.
  • Page 11 AV-14F71 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 SECAM NTSC 3.58...
  • Page 12 AV-14F71 REPLACEMENT OF IC301 (IF V/C DECODER) " For the IC301(IF V/C DECODER) of this model, all data are written in the micro-computer. So, write the data in the micro- computer in accordance with the following procedures before starting adjustment. REPLACING PROCEDURES Turn the POWER OFF.
  • Page 13: Service Adjustment

    AV-14F71 SERVICE ADJUSTMENT BEFORE STARTING SERVICE ADJUSTMENT 1. There are 2 way of adjusting this TV: One is with the 6. Never touch any adjustment parts, which are not specified REMOTE CONTROL UNIT and the other is the conventional in the list for this adjustment VRs, transforms, condensers, method using adjustment parts and components.
  • Page 14 AV-14F71 BASIC OPERATION OF SERVICE MENU " The adjustment using SERVICE MENU The following adjustment items use the SERVICE MENU in the series of the adjustment. The adjustments are made on the basis of the initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values. With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of settings.
  • Page 15 AV-14F71 [Method of setting] 1. IF [1. VCO] ① 1 Key ・・・・・・・・・・・・・・・・・・・・・・・・・ Select 1.IF . ② 1 Key ・・・・・・・・・・・・・・・・・・・・・・・・・ Select 1.VCO ③ The VCO (CW) screen will be displayed a allow mark when the AFC voltage is at a certain level. ④...
  • Page 16 AV-14F71 SERVICE MENU FLOW CHART SERVICE MENU SUB MENU 1. IF VCO (CW) ***.** MHz SERVICE MENU TOO HIGH ABOVE REFERENCE 1.IF 2.V/C JUST REFERENCE 3.DEF 4.VSM PRESET 1. VCO BELOW REFERENCE 5.PRESET 2. DELAY POINT TOO LOW 6.TURBO TIMER OFF AFT ADJUST ***(**) ***(**)
  • Page 17 AV-14F71 ADJUSTMENT LOCATIONS CRT SOCKET PWB (SOLDER SIDE) TP-47R TP-47G TP-47B TP-E CRT EARTH WIRE (BRAIDED ASS'Y) MAIN PWB FRONT F901 IC702 IC701 MEMORY IC IC301 TU001 1Pin TP-91(B1) UPPER:FOCUS 2Pin NC LOWER:SCREEN 3Pin X-ray2 4Pin X-ray1 5Pin TP-E( No. 51918...
  • Page 18: Focus Adjustment

    AV-14F71 ADJUSTMENTS B1 POWER SUPPLY Measuring Item Test point Adjustment part Description instrument Check of Signal TP-91 (B1) 1. Input a whole black signal. B1 Power generator TP-E (# # # # ) 2. Connect a DC voltmeter to TP-91(B1) and TP-E ( # ). Supply 3.
  • Page 19 AV-14F71 Measuring Item Test point Adjustment part Description instrument Signal Adjustment DELAY POINT 1. Input a black and white signal (colour off). generator of DELAY 2. Select 1. IF from the SERVICE MENU. (AGC TAKE-OVER) POINT 3. Select 2. DELAY POINT by pressing the 2 key on the remote Remote (AGC) control unit...
  • Page 20 AV-14F71 VIDEO / CHROMA CIRCUIT ADJUSTMENT 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”.
  • Page 21 AV-14F71 Measuring Item Test point Adjustment part Description instrument Remote Adjustment 3. BRIGHT 1. Receive any broadcast. control unit 2. Select 2. V/C from SERVICE MENU. 3. Select 3. BRIGHT with the MENU ▼ / ▲ key. BRIGHT 4. Set the initial setting value with the MENU - or + key. 5.
  • Page 22 AV-14F71 Measuring Item Test point Adjustment part Description instrument Signal Adjustment TP-47R/G 5. COLOUR [Method of adjustment using measuring instrument] generator of SUB COLOUR Ⅱ Ⅱ Ⅱ Ⅱ TP-E (# # # # ) Oscillo- 1. Input a PAL full field colour bar signal (75% white). scope [CRT SOCKET 2.
  • Page 23 AV-14F71 Measuring Item Test point Adjustment part Description instrument Signal Adjustment 6. TINT [Method of adjustment without measuring instrument] generator of TINTⅠ Ⅰ Ⅰ Ⅰ 1. Input a NTSC 3.58 full field colour bar signal (75% white). Remote NTSC 3.58 TINT control unit 2.
  • Page 24 AV-14F71 Measuring Item Test point Adjustment part Description instrument Remote Adjustment [Method of adjustment using measuring instrument] control unit of SECAM BLACK 7.SECAM 1. Receive a SECAM full field colour bar signal. Signal OFFSET generator BL ADJUST 2. Select 2. V/C from SERVICE MENU. 3.
  • Page 25 AV-14F71 DEFLECTION CIRCUIT ADJUSTMENT " There are 2 modes of adjustment (setting value) ------ ① 50Hz mode and ② 60Hz mode ----- depending upon the kind of signals (vertical frequency 50Hz / 60Hz). " When adjusted in mode ① , mode ② will be automatically set. The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.
  • Page 26 AV-14F71 Measuring Item Test point Adjustment part Description instrument ● ● ● ● When the vertical linearity has been deteriorated Signal Adjustment 4. VER. LIN. generator of VER. LIN. 5. VER. SCURVE remarkably, perform the following steps. & VER. 13. Input a cross-hatch signal. Remote 14.
  • Page 27 AV-14F71 VSM PRESET SETTING Measuring Item Test point Adjustment part Description instrument Setting of Remote TINT 1. Select 4. VSM PRESET from the SERVICE MENU. control unit COLOUR 2. Select BRIGHT with the PICTURE MODE key. 3. Adjust the MENU ▼ / ▲ and MENU - or + key to bring the set PRESET BRIGHT values of TINT ~...
  • Page 28 AV-14F71 PURITY / CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1. Demagnetize CRT with the demagnetizer. WEDGE DEFLECTION 2. Loosen the retainer screw of the deflection yoke. YOKE 3. Remove the wedges. 4. Input a green raster signal from the signal generator, and turn the screen to green raster.
  • Page 29 AV-14F71 STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig.1) and turn them to magenta (red/blue). (FRONT VIEW ) 3. Using 6-pole convergence magnets, overlap magenta(red/blue) and green lines in the center of the screen...
  • Page 30: Replacement Of Chip Component

    AV-14F71 REPLACEMENT OF CHIP COMPONENT ! 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. ! SOLDERING IRON 1.
  • Page 31 VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan AV14F71VT-CK #999 VP 0111 DP7051...
  • Page 32: Parts List

    AV-14F71 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.
  • Page 33: Exploded View Parts List

    AV-14F71 CONTENTS ! EXPLODED VIEW PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ! EXPLODED VIEW 32, 33 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ! PRINTED WIRING BOARD PARTS LIST MAIN P.W.BOARD ASS'Y ( " ・・・・・・・・・・・・・・・・・・・・・・・・・・・ SCG-1279A-CK (With CRT SOCKET PW BOARD) ! REMOTE CONTROL UNIT PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ! PACKING ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・...
  • Page 34 AV-14F71 CRT SOCKET PWB (Within MAIN PWB) MAIN PWB T1522 (× × × × 1) (× × × × 5) No.51918...
  • Page 35: Printed Wiring Board Parts List

    AV-14F71 PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS’Y (SCG-1279A-CK) ! SW,X&Y+%&$ '()*+%&$ '()*+%(," -"./)01*0&2 ! SW,X&Y+%&$ '()*+%&$ '()*+%(," -"./)01*0&2 ++++++++++++++++++++++++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++ !BS>S@O! !BS>S@O! !544KM47 %!S64K9MKK5< HI+! KK4!+5Z54J+++9 !5L4K %!S64K9M4!4< HI+! 4$4!+5Z54J+++9 !5448 %!S64K9MLN7< HI+! LN[!+5Z54J+++9 !5L47 %!S64K9MN=K<...
  • Page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
  • Page 37 AV-14F71 ! SW,X&Y+%&$ '()*+%&$ '()*+%(," -"./)01*0&2 ! SW,X&Y+%&$ '()*+%&$ '()*+%(," -"./)01*0&2 ++++++++++++++++++++++++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++ ?6'6?>@O! ->O-B ?5RK4 %?CK5QUM547< ?+?6'$ 4$45"T+++L43+++U -5L=5 H67K44ZHZM< VB%B!+->O-B -5L=K !I'549M@SM@7 S>$->O-B ?5RK5 %?CK5QUM777< ?+?6'$ 4$477"T+++L43+++U -5NL5MLK H6555M< S>$->O-B ?5RKK %-?K5Q9M545< ?+?6'$ 5441T+++L43+++9 -5NL7 H@V95=6M@K VB%B!+->O-B...
  • Page 38 AV-14F71 ! SW,X&Y+%&$ '()*+%&$ '()*+%(," -"./)01*0&2 ++++++++++++++++++++++++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++ O@QB!S ! T5;45 PHTL5BKM7!5L98 TASB 7$5L6 T?5;45 ?BHI44KM445V TASB+?:>' 9544K P%%47=8M445 '>%+96?U 95447 P%%4K=5M447 '>%+96?U 95448 P%%4K=5M44K '>%+96?U 9544L P%S45NLM445 '>%+96?U 9544N P%%4K=5M44K '>%+96?U U5445 PP!4NK5M44KV CB6-S+?O!B U57L5 PP!4NK5M44KV CB6-S+?O!B U58K5 PP!4L=KM445V CB6-S+?O!B U5;K5MKK...
  • Page 39: Remote Control Unit

    AV-14F71 REMOTE CONTROL UNIT REMOTE CONTROL UNIT PARTS LIST (RM-C364GY-1H) ! !"#$%&$ '()*+%&$ '()*+%(,"$ -"./)01*0&2 +++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ KLM55N=T C6@@B!F+?O3B! +++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ No. 51918...
  • Page 40: Packing Parts List

    AV-14F71 PACKING PACKING PARTS LIST ! !"#$%&$ '()*+%&$ '()*+%(," -"./)01*0&2 +++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ II5444RM45R6MB '6?U>%I+?6SB :?54=77M44KCMQ ?ASQ>O%+6SSF 81/.+02+5."* II74477M44K6MB 'O:F+C6I !HM?7NRIFM5Q !BHO?O%+A%>@ II74478M4456MB 'O:F+C6I ! ++N :?@547KM4456 >%S@+COOU ?B6C44LM44695 H6@?Q>%I+CO< ?H7L=8RM44CMQ !O-+6%@B%%6 II8445LM4456MB SB!>6:+:6CB: +++++++++++++++++ + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ No. 51918...
  • Page 41 AV-14F71 SCHEMATIC DIAGRAMS COLOUR TELEVISION AV-14F71 BASIC CHASSIS CD-ROM No.SML200111 CONTENTS NOTE ON USING CIRCUIT DIAGRAMS SEMICONDUCTOR SHAPES BLOCK DIAGRAM CIRCUIT DIAGRAMS PATTERN DIAGRAMS No.51918 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. Nov. 2001...
  • Page 42: Standard Circuit Diagram

    AV-14F71 AV-14F71 CONTENTS STANDARD CIRCUIT DIAGRAM SEMICONDUCTOR SHAPES NOTE ON USING CIRCUIT DIAGRAMS BLOCK DIAGRAM 1.SAFETY Type The components identified by the symbol and shading are No indication :Ceramic capacitor CIRCUIT DIAGRAMS critical for safety. For continued safety replace safety critical :Metalized mylar capacitor :Polypropylene capacitor components only with manufactures recommended parts.
  • Page 43: Block Diagram

    AV-14F71 AV-14F71 BLOCK DIAGRAM IC651 Q102 SF101 TU001 AUDIO AMP IF AMP TUNER AUDIO SF102 HEAD PHONE Q103 FRONT 18.19 REMOCON VIDEO SCL/SDA AUDIO AUDIO 37.38 3.58/ IC201 1 CHIP DECODER IC701 IND. MICRO COMPUTER IC702 10.11.12 CRT SOCKET MEMORY VIDEO VIDEO AUDIO...
  • Page 44: Main Pwb

    AV-14F71 AV-14F71 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/2) PIC-28143SY QAS0054-001 MAIN PWB AT24C08-21DTT2 MEMORY SCG-1279A-CK 220/16 No.51918 No.51918...
  • Page 45 AV-14F71 AV-14F71 MAIN PWB CIRCUIT DIAGRAM (2/2) A34JLL91X84 QMP40D0-200J5 PICTURE TUBE QAF0052-621 2SC4722/NP/ 2SC4722/NP/ QQR1095-002 QSK0061-002 QAD0119 -9R0 CELD025-005J6 6.8K 470p AC275V 1.8K .047 AC275V UNFR 4.7 7W 2SC4722/NP/ QRF074K-4R7 470p AC275V CRT SOCKET PWB (2/2) AC250V AC250V QCZ9082-222Z QCZ9082-222Z (Within MAIN PWB) SCG-1279A-CK .0027...
  • Page 46 AV-14F71 AV-14F71 PATTERN DIAGRAMS MAIN PWB & CRT SOKET PWB PATTERN MAIN PWB TP-E TP-91 FRONT (B1) CRT SOCKET PWB 82 No.51918 2-10 No.51918 ,2$$...
  • Page 47 VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan Printed in Japan AV14F71VT-H #999 VP 0111 DP6060...

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