JVC AV-14F3PX Service Manual

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SERVICE MANUAL
AV-14F3PX
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.
COLOR TELEVISION
+
No. 56083
BASIC CHASSIS
(PH)
AV-14F3PX
AV-14F3PX
GA2
No. 56083
1
Sep. 2000

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Summary of Contents for JVC AV-14F3PX

  • Page 1: Table Of Contents

    AV-14F3PX AV-14F3PX SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS AV-14F3PX (PH) − 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: Specifications

    AV-14F3PX SPECIFICATIONS Item Content Dimensions (W × H × D) 462mm × 340.5mm × 375mm Mass 10kg TV RF System CCIR (M) & (N) Color System NTSC / PAL-M / PAL-N Sound Multiplex System BTSC (Multi-channel sound) TV Receiving Channel and Frequency...
  • Page 3: Safety Precautions

    AV-14F3PX SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many 8. When service is required, observe the original lead dress. Ex- circuits and components specially for safety purposes. For con- tra precaution should be given to assure correct lead dress in tinued protection, no changes should be made to the original the high voltage circuit area.
  • Page 4: Features

    AV-14F3PX FEATURES New chassis design enables use of an interactive on-screen control. Wide range voltage for AC power input. With AUDIO / VIDEO INPUT & OUTPUT terminals. MUTING button can reduce the audio level to zero instantly. Functional remote control to operate TV set (for channel select, volume control, power ON/OFF, etc.) from a distance.
  • Page 5 AV-14F3PX FRONT CABINET SPEAKER (×2) CRT SOCKET PWB (Within MAIN PWB) MAIN PWB SPEAKER (×2) REAR COVER (×2) (×5) No. 56083...
  • Page 6: Replacement Of Memory Ic

    AV-14F3PX REPLACEMENT OF MEMORY IC MEMORY IC (5) Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the This TV uses the following memory IC. receive channels (channels preset). Memory IC: IC1704 on MAIN PW Board The memory IC memorizes data for correctly operating the (6) User settings video and deflection circuits.
  • Page 7 AV-14F3PX SETTING OF SYSTEM CONSTANT SET Table 1 Setting item Setting contents Se tting value VIDEO AUDIO MONO PH. MONO VARI. OUT GAME CINEMA RETURN+ SURROUND USER SETTING VALUES Setting of Function Table 2-1 Setting item Setting value Setting item...
  • Page 8 AV-14F3PX SERVICE MENU SETTING ITEMS Table 3 Service menu Setting item Service menu Setting item PICTURE 1. PICTURE 54. H POS. 60 2. BRIGHT 55. H BLK. 60 Do not adjust. 3. COL. PALM 56. V POS. 60 4. COL. PALN 57.
  • Page 9: Replacement Of Chip Component

    AV-14F3PX 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.
  • Page 10: Service Adjustments

    AV-14F3PX 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 11 AV-14F3PX 3. BASIC OPERATION IN SERVICE MENU SERVICE MENU NOTE: In each menu screen, key operation guide will appear at the bottom, which will help your menu operation. SERVICE MENU (1) How to enter SERVICE MENU PICTURE SOUND VIDEO STATUS...
  • Page 12 AV-14F3PX SERVICE MENU AND SUB MENU SCREENS SERVICE MENU (MAIN MENU) SCREEN A SUB MENU: PICTURE SERVICE MENU PICTURE SOUND VIDEO STATUS OTHERS LOW LIGHT HIGH LIGHT RF AFC CHK 1. PICTURE VCO (CW) I2C BUS CTRL SELECT EXIT BY...
  • Page 13 AV-14F3PX ADJUSTMENT LOCATIONS MAIN PWB FRONT TIMER POWER MENU REMOCON IC701 RECEIVER F901 IC704 MEMORY S901 POWER SW IC201 T111 TU001 UPPER : FOCUS 1 Pin TP-91(B1) LOWER : SCREEN 2 Pin NC 3 Pin TP-E (") CRT SOCKET PWB...
  • Page 14: Initial Setting Value Of Service Menu

    AV-14F3PX INITIAL SETTING VALUE OF SERVICE MENU 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 15 AV-14F3PX SOUND Setting item Variable range Initial setting value Setting item Variable range Initial setting value 1. NOISE 000 / 001 7. LOW SEP. 000 ~ 063 2. IN LEVEL 000 ~ 063 8. HI SEP. 000 ~ 063 3. FH MON.
  • Page 16 AV-14F3PX ADJUSTMENTS B1 POWER SUPPLY CHECK Measuring Description Item Test point Adjustment part instrument Check of Signal B1 (TP-91) 1. Receive a black and white signal (color off). (NTSC) B1 POWER Generator TP-E (" " " " " ) 2. Connect a DC voltmeter between B1 (TP-91) and TP-E (") SUPPLY (between pins 1 and 3 of the connector B1).
  • Page 17 AV-14F3PX DEFLECTION CIRCUIT ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on page 14. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 18 AV-14F3PX VIDEO/CHROMA CIRCUIT ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on pages 14 and The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 19 AV-14F3PX Measuring Description Item Test point Adjustment part instrument 1. Receive any broadcast. Adjustment Remote 2. BRIGHT 2. Select the sub menu screen PICTURE from the SERVICE control unit MENU. 3. Select 2. BRIGHT with the MENU 1/4 key, and confirm its BRIGHT initial setting value.
  • Page 20 AV-14F3PX Measuring Description Item Test point Adjustment part instrument [Method of adjustment using measuring instrument] Adjustment Signal TP-47B of SUB generator TP-E (" " " " " ) COLOR-II [CRT (PAL-M COLOR) Oscillo- SOCKET 3. COL. PALM 1. Receive a PAL-M full field color bar signal (75% white).
  • Page 21 AV-14F3PX Measuring Description Item Test point Adjustment part instrument Adjustment Signal TP-47B 6. TINT [Method of adjustment using measuring instrument] generator TP-E (" " " " " ) SUB TINT-II [CRT Oscillo- SOCKET 1. Receive a NTSC 3.58 color bar signal (full field color bar 75% white).
  • Page 22 AV-14F3PX MTS CIRCUIT (AUDIO CIRCUIT) ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on pages 15. Do not change the initial setting values of the setting (adjustment) items not listed herein.
  • Page 23 AV-14F3PX Measuring Description Item Test point Adjustment part instrument Adjustment TV audio L OUT 7. LOW SEP. 1. Input a stereo L signal (300Hz) from the TV audio multiplex multiplex R OUT 8. HI SEP. signal generator to the Antenna terminal. (NTSC)
  • Page 24 AV-14F3PX PURITY, CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1. Demagnetize CRT with the demagnetizer. WEDGE DEFLECTION YOKE 2. Loosen the retainer screw of the deflection yoke. 3. Remove the wedges. (Fig. 1.) 4. Input a green raster signal from the signal generator, and turn the screen to green raster.
  • Page 25 AV-14F3PX 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 26 AV-14F3PX 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 27: Parts List

    AV-14F3PX VICTOR COMPANY OF JAPAN, LIMITED TELEVISION RECEIVER DIVISION 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan AV14F3PHPXSK #3 CTH 0009 No. 56083...

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