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JVC AV-16N8 Service Manual

Colour television
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Download this manual See also: Remote Control Manual
SERVICE MANUAL
CONTENTS
SPECIFICATIONS ........................................................................................................................... 2
SAFETY PRECAUTIONS ................................................................................................................ 3
FEATURES ...................................................................................................................................... 4
OPERATING INSTRUCTIONS (APPENDED) .............................................................................. 1-1
SPECIFIC SERVICE INSTRUCTIONS ............................................................................................ 4
SERVICE ADJUSTMENTS ............................................................................................................ 10
STANDARD CIRCUIT DIAGRAM (APPENDED) ......................................................................... 2-1
PARTS LIST ................................................................................................................................... 27
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.

COLOUR TELEVISION

AV-16N8
−
+
−
+
(VT)
No. 56094
AV-16N8
AV-16N8
BASIC CHASSIS
CL-M
No. 56094
1
Sep. 2000

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Summary of Contents for JVC AV-16N8

  • Page 1: Colour Television

    AV-16N8 AV-16N8 SERVICE MANUAL COLOUR TELEVISION BASIC CHASSIS CL-M AV-16N8 (VT) − − CONTENTS SPECIFICATIONS ........................... 2 SAFETY PRECAUTIONS ........................ 3 FEATURES ............................4 OPERATING INSTRUCTIONS (APPENDED) ................1-1 SPECIFIC SERVICE INSTRUCTIONS .................... 4 SERVICE ADJUSTMENTS ......................10 STANDARD CIRCUIT DIAGRAM (APPENDED) ................. 2-1 PARTS LIST ...........................

  • Page 2: Replacement Of Memory Ic

    AV-16N8 REPLACEMENT OF MEMORY IC MEMORY IC SERVICE MENU This TV uses the following memory IC. Memory IC: IC1702 on MAIN PW Board SERVICE MENU The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, 1.
  • Page 3 AV-16N8 NAME OF REMOTE CONTROL KEYS POWER DISPLAY DISPLAY MENU − − MENU MENU MENU LIVE SPATIAL MENU − CHANNEL VOLUME SYSTEM PICTURE MUTING COLOUR SOUND BOOSTER TV/VIDEO PICTURE MODE PICTURE MODE RETURN+ -/-- CHANNEL SCAN ECO SENSOR OFF TIMER...
  • Page 4 AV-16N8 SERVICE MENU SETTING ITEMS Table 3 Service menu Setting item Service menu Setting item 1. IF 1. VCO 3. VSM PRESET TINT 2. DELAY POINT (BRIGHT/STD/SOFT) COLOUR BRIGHT Do not adjust. CONT. 2. V / C 1. CUTOFF(R/G/B) SHARP 2.

  • Page 5: Service Adjustments

    AV-16N8 SERVICE ADJUSTMENTS BEFORE STARTING SERVICE ADJUSTMENT 7. Preparation for adjustment (presetting): 1. There are 2 ways for adjusting this TV: One is with the Unless otherwise specified in the adjustment items, preset the REMOTE CONTROL UNIT and the other is the conventional following functions with the remote control unit.
  • Page 6 AV-16N8 3. BASIC OPERATION IN SERVICE MENU SERVICE MENU (1) How to enter SERVICE MENU Press the DISPLAY key and the PICTURE MODE key on SERVICE MENU the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1.) 1.
  • Page 7 AV-16N8 (3) Method of Setting *Once the setting values are set, they are memorized automatically. *It must not adjust without inputting a signal. 1) 1. IF [1. VCO] (a) 1 Key ......... Select 1. IF. (b) 1 Key ......... Select 1. VCO. (CW) (c) VCO(CW) TRANSF.
  • Page 8 AV-16N8 ADJUSTMENTS B1 POWER SUPPLY Measuring Description Item Test point Adjustment part instrument Check of Signal TP-91 (B1) 1. Receive a whole black signal. B1 POWER Generator TP-E (" " " " " ) 2. Connect a DC voltmeter between TP-91 (B1) and TP-E (") SUPPLY (between pins 1 and 5 of the connector S1).
  • Page 9 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment Remote DELAY POINT 1. Receive a black and white signal (colour off). of DELAY control unit (AGC TAKE-OVER) 2. Select 1. IF from the SERVICE MENU. POINT 3. Select 2. DELAY POINT by pressing the 2 key on the remote control.
  • Page 10 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment Signal 1. CUTOFF (R) 1. Receive a black and white signal (colour off). of WHITE generator CUTOFF (G) 2. Select 2. V/C from the SERVICE MENU. 3. Select 1. CUTOFF (R), (G) and (B) with MENU a key, and...
  • Page 11 AV-16N8 Measuring Description Item Test point Adjustment part instrument 1. Receive any broadcast. Adjustment Remote 3. BRIGHT 2. Select 2. V/C from the SERVICE MENU. control unit 3. Select 3. BRIGHT with the MENU a key. 4. Set the initial setting value with the MENU − or + key.
  • Page 12 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment Signal TP-47G 5. COLOUR [Method of adjustment using measuring instrument] of SUB generator TP-E (" " " " " ) COLOUR-II [CRT Oscillo- SOCKET PAL COLOUR (PAL COLOUR) scope PWB] 1.
  • Page 13 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment Remote 6. TINT [Method of adjustment without measuring instrument] control unit SUB TINT-I NTSC 3.58 TINT (NTSC 3.58 TINT) 1. Receive a NTSC 3.58 colour bar signal (full field colour bar 75% white).
  • Page 14 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment Remote [Method of adjustment without measuring instrument] of BLACK control unit OFFSET-I (SECAM) 7. BLACK OFFSET 1. Receive a SECAM broadcast. (R-Y) 2. Select 2. V/C from the SERVICE MENU.
  • Page 15 AV-16N8 DEFLECTION CIRCUIT ADJUSTMENT There are 2 modes of adjustment (initial setting value) — 50Hz mode and 60Hz mode — depending upon the kind of signals (vertical frequency 50Hz / 60Hz). When adjusted in 50Hz mode, 60Hz mode will be automatically set.
  • Page 16 AV-16N8 Measuring Description Item Test point Adjustment part instrument Adjustment 10. H. CENTER 6. Receive a circle pattern signal. 7. Select 10. H. CENTER with the MENU a key. H. CENTER 8. Set the initial setting value of 10. H. CENTER with the MENU −...
  • Page 17 AV-16N8 VSM PRESET ADJUSTMENT Measuring Description Item Test point Adjustment part instrument Setting of Remote TINT (VSM PRESET) control unit COLOUR 1. Select 3. VSM PRESET from the SERVICE MENU. PRESET BRIGHT 2. Select BRIGHT with the PICTURE MODE key.
  • Page 18 AV-16N8 PURITY, CONVERGENCE ADJUSTMENT Note: The picture tube includes the deflection yoke and purity magnets, and purity and convergence adjustments are precisely adjusted at the factory. PURITY ADJUSTMENT 1. Demagnetize CRT with the demagnetizer. WEDGE DEFLECTION YOKE 2. Loosen the retainer screw of the deflection yoke.
  • Page 19 AV-16N8 STATIC CONVERGENCE ADJUSTMENT 1. Input a cross-hatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) to turn them to magenta (red/blue). (FRONT VIEW) 3. Using 6-pole convergence magnets, overlap the magenta (red/ blue) and green lines in the center of the screen to turn them to white.
  • Page 20 AV-16N8 SELF-CHECK FUNCTIONS 1. Outline This model has self-check functions given below. When an abnormality has been detected, the SUB POWER is turned off and the ON TIMER 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 21: Standard Circuit Diagram

    AV-16N8 STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS Type No indication : Ceramic capacitor 1. SAFETY : Mylar capacitor The components identified by the ! ! ! ! ! symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety critical : Polypropylene capacitor components only with manufactures recommended parts.

  • Page 22: Circuit Diagrams

    AV-16N8 CONTENTS SEMICONDUCTOR SHAPES ............2-4 BLOCK DIAGRAM ................2-5 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM ....................2-7 CRT SOCKET PWB CIRCUIT DIAGRAM ................2-13 PATTERN DIAGRAMS MAIN PWB PATTERN ......................2-15 CRT SOCKET PWB PATTERN ....................2-17 SEMICONDUCTOR SHAPES...

  • Page 23: Block Diagram

    AV-16N8 AV-16N8 BLOCK DIAGRAM MAIN PWB SAW FILTER SP02 V-1N Q101 CF106 CF103 CF601 TUNER SF101 V-OUT 6.0 TRAP 4.5MHz 4.5TRAP V-1N IC651 LOUT AUDIO AMP SP01 ROUT Q103 SAW FILTER (PAL) BUFFER SF102 S-1N T101 Q102 CF104, 105 Q107 (CW) 5.5/6.5 TRAP...
  • Page 24 AV-16N8 AV-16N8 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/3) SCL-1287A-CK (AV-16N8-VT) No. 56094 No. 56094...
  • Page 25 AV-16N8 AV-16N8 MAIN PWB CIRCUIT DIAGRAM (2/3) CRT SOCKET 16N8-VT CRT SOCKET SCL-1287A-CK (AV-16N8-VT) No. 56094 2-10 No. 56094...
  • Page 26 AV-16N8 AV-16N8 MAIN PWB CIRCUIT DIAGRAM (3/3) DY01 DEF YOKE INCLUDED IN CRT H.DY V.DY SCL-1287A-CK (AV-16N8-VT) 2-11 2-12 No. 56094 No. 56094...
  • Page 27 AV-16N8 AV-16N8 CRT SOCKET PWB CIRCUIT DIAGRAM MAIN SCL-3013A-CK (AV-16N8-VT) FOR MAIN PWB 2-13 2-14 No. 56094 No. 56094...
  • Page 28 MENU CHANNEL VOLUME ON TIMER POWER EXIT PICTURE MODE CHANNEL SCAN RETURN OFF TIMER...

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