JVC TM-H1700G/E Service Manual

JVC TM-H1700G/E Service Manual

Colour video monitor

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SERVICE MANUAL
COLOUR VIDEO MONITOR
CONTENTS
SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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★ OPERATING INSTRUCTIONS (APPENDIX) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
SERVICE ADJUSTMENTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
★ STANDARD CIRCUIT DIAGRAM (APPENDIX) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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TM-H1700G
BASIC CHASSIS
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No.51922
Jan. 2002

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Summary of Contents for JVC TM-H1700G/E

  • Page 1 TM-H1700G SERVICE MANUAL COLOUR VIDEO MONITOR BASIC CHASSIS TM-H1700G TM-H1700G CONTENTS SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・ 2 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・ ・・・・・・ ★ OPERATING INSTRUCTIONS (APPENDIX) ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・1-1 SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 3 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・...
  • Page 2: Specifications

    TM-H1700G SPECIFICATIONS Item Content Dimension (W× × × × H× × × × D) 395mm×334mm×418.1mm / 15-5/8”×13-1/4”×16-1/2” Mass 19.6kg / 43.2lbs Colour system PAL / NTSC 3.58 17inch square type 41cm / 16-3/16” measured diagonally Picture tube in-line gun, trio–dot type, dot pitch 0.27mm 327.5mm×246.2mm (W×H) / 407.1mm (Diagonal) Effective screen size 12-7/8”×9-5/8”...
  • Page 3: Safety Precautions

    TM-H1700G SAFETY PRECAUTIONS For District of power requirement is 120V AC (Mainly North America) 1. The design of this product contains special hardware, many 10. Isolation Check circuits and components specially for safety purposes. For (Safety for Electrical Shock Hazard) continued protection, no changes should be made to the After re-assembling the product, always perform an isolation original design unless authorized in writing by the manufacturer.
  • Page 4 TM-H1700G SAFETY PRECAUTIONS For District of power requirement is 230V~ ~ ~ ~ 240V AC (Europe, Asia and Oceania) 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...
  • Page 5 TM-H1700G SAFETY PRECAUTIONS For UK and Hong Kong 1. The design of this product contains special hardware and many 4. The leads in the products are routed and dressed with ties, clamps, circuits and components specially for safety purposes. For tubing’s, barriers and the like to be separated from live parts, high continued protection, no changes should be made to the original temperature parts, moving parts and / or sharp edges for the...
  • Page 6: Disassembly Procedure

    TM-H1700G SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE CAUTION Even with the power switch turn off, some parts of in this unit are live. Be sure to disconnect the power plug from the AC outlet before disassembly and reassembly. REMOVING THE TOP COVER 1.
  • Page 7 TM-H1700G FRONT PANEL TOP COVER SOCKET PWB FRONT CONTROL PWB SPEAKER SUB DEF. PWB CHASSIS BASE EARTH WIRE MAIN POWER MAIN PWB SIGNAL INPUT SWITCH POWER CORD TERMINAL BRACKET Fig.2 REAR PANEL BOTTOM COVER Fig.1 Fig.3 No.51922...
  • Page 8 TM-H1700G REMOVING THE CHASSIS BASE A METHOD OF ERECTING THE CHASSIS BASE Remove the top cover, rear panel and terminal bracket. To check the PW board from back side. 1. Fall the unit down side ways as able to see the bottom side. (1) Remove the chassis base and the other PW boards.
  • Page 9 TM-H1700G REPLACEMENT OF MEMORY IC 1. MEMORY IC This model uses memory IC. In the memory IC, memorized data for correctly operating for the video-chroma, deflection and the other control circuits. SET-UP MENU When replacing memory IC, be sure to use the IC written with <...
  • Page 10 TM-H1700G INITIAL SETTING VALUE OF THE SET-UP MENU Setting item Setting content / Range Initial setting value CONTRAST BRIGHT PICTURE SUB ADJ. PHASE CHROMA -05 ~ +05 H. POSITION -05 ~ +05 V. POSITION -20 ~ +20 CUTOFF (R / G / B) WHITE BALANCE -20 ~...
  • Page 11 TM-H1700G BLOCK SELECT ITEMS It is no requirement for adjustment about part in the table. Don’t change the values. SIGNAL BLOCK DEFLECTION BLOCK ASPECT RATIO VERTICAL ITEM INPUT SIGNAL CONTENTS ITEM CONTENTS SCAN SIZE FREQUENCY BRIGHT HORIZONTAL POSITION CONTRAST HORIZONTAL SIZE VIDEO CHROMA(PAL) VERTICAL POSITION...
  • Page 12: Adjustment Items

    TM-H1700G SERVICE ADJUSTMENTS BEFORE STARTING SERVICE ADJUSTMENT ITEMS ADJUSTMENT BASIC ADJUSTMENT 1. Confirm the proper AC power voltage is being supplied. Checking of B1 voltage 2. Supply power to the set and measuring instruments and allow to Checking of High voltage warm up for at least 30 minutes.
  • Page 13 TM-H1700G MEASURING INSTRUMENTS AND STANDARD SIGNAL DC voltmeter (digital voltmeter) High voltage meter Oscilloscope Colour temperature meter or Colour analyser COMPONENT / RGB input card (IF-C01COM) Signal generator (PAL/NTSC systems) The waveforms of signals refer to the following figure. STANDARD VIDEO SIGNALS FOR ADJUSTMENT COMPOSITE VIDEO SIGNAL (PAL / NTSC colour bar) 0% SETUP 75% saturation...
  • Page 14: Adjustment Locations

    TM-H1700G ADJUSTMENT LOCATIONS FRONT CONTROL PWB FRONT MENU +(UP) ー ー (DOWN) CHROMA ー ー PHASE VOLUME/SELECT CONTRAST POWER SW BRIGHT UNDER VIDEO SCAN FFC WIRE SPEAKER MAIN PWB FRONT SUB DEF. PWB TO DEF YOKE SIGNAL INPUT PWB TO DEG COIL B1 ADJ VR TO CRT SOCKET PWB TO MAIN POWER SWITCH...
  • Page 15 TM-H1700G UPPER CRT SOCKET PWB (SOLDER SIDE) TP-47G TP-47B CRT EARTH WIRE TO MAIN PWB (BRAIDED ASS'Y) TP-E SIGNAL INPUT PWB UPPER FRONT REMOTE D-SUB J001 15PIN MICRO COMPUTER J002 VIDEO A MEMORY IC J003 VIDEO B J004 J005 AUDIO A J006 AUDIO B CN002...
  • Page 16 TM-H1700G BASIC OPERATION OF SERVICE MENU 1. SERVICE MENU ITEMS With the SERVICE MENU, various settings can be made, and they are broadly classified in the following items of adjustments. It is no requirement for adjustment the portion of the DEFLECTION BLOCK and CONTROL BLOCK. This block adjusts the data of the various signal SIGNAL BLOCK ・・・・・・・・・・・・・・...
  • Page 17 TM-H1700G (2) OPERATION OF <BLOCK SELECT> SCREEN SERVICE MENU While the SERVICE MENU <BLOCK SELECT> screen is displaying, in accordance with the key control display (Function Display) at the lower side < BLOCK SELECT > of the screen, be able to operate the various items (Fig. 5). SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK...
  • Page 18 TM-H1700G HOW TO OPERATE EACH SERVICE MENU ITEMS ■ SIGNAL BLOCK SIGNAL BLOCK ① In the <BLOCK SELECT> screen, press the CHROMA/PHASE key. ② Then SIGNAL BLOCK adjustment mode screen is displayed (Fig. 7). ③ The original front key function replaced with the different function displayed at the lower side of the screen as shown below.
  • Page 19 TM-H1700G CUTOFF ADJUSTMENT SCREEN [ WHITE BALANCE Adjustment : METHOD 1 ] Accordance with the screen display, select the each WHITE BALANCE mode following below. CUTOFF adjustment mode (Low light adjustment) ① In the WHITE BALANCE menu screen, press the CHROMA/PHASE key to enter to the CUTOFF adjustment mode (Fig.
  • Page 20 TM-H1700G [WHITE BALANCE Adjustment : METHOD 2 ] SERVICE MENU has the other method for adjusting the WHITE BALANCE. EACH ADJUSTMENT MODE ① In the WHITE BALANCE menu screen, press the VOLUME/SELECT +(UP) key, then enter to the “W01” adjustment mode (Fig. 13). ②...
  • Page 21 TM-H1700G ■ DEFLECTION BLOCK DEFLECTION BLOCK ① In the <BLOCK SELECT> screen, press the VOLUME/SELECT – (DOWN) key. ② Then the DEFLECTION BLOCK adjustment screen is displayed (Fig. 14). The indication service number on the screen are changed by the vertical frequency, aspect ratio and scan size of signal for adjustment.
  • Page 22 TM-H1700G 4. SERVICE MENU FLOW CHART SERVICE MENU <BLOCK SELECT> < BLOCK SELECT > SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK W/B DEF CNTL EXIT SIGNAL BLOCK CUTOFF ADJUSTMENT * * * * * * * * * * * * <...
  • Page 23 TM-H1700G INITIAL SETTINGS OF THE SERVICE MENU It is no requirement for adjustment of the part of the tables. Don’t change the values. SIGNAL BLOCK Item Input Signal Contents Variable Range Attribute Initial Value BRIGHT 000 ~ 255 ABSOLUTE CONTRAST 000 ~...
  • Page 24 TM-H1700G DEFLECTION BLOCK Scan size Vertical Item Contents Variable Range Attribute Initial Value Aspect Ratio Frequency HORIZONTAL POSITION ABSOLUTE 000 ~ 031 HORIZONTAL SIZE 000 ~ 063 ABSOLUTE VERTICAL POSITION 000 ~ 127 ABSOLUTE VERTICAL SIZE 000 ~ 127 ABSOLUTE 50Hz VERTICAL LINEARITY ABSOLUTE...
  • Page 25: Control Block

    TM-H1700G CONTROL BLOCK Item Contents Variable Range Attribute Initial Value DESTINATION 000 ~ 001 FIXED 0 : FOR JAPN (9300) 1 : FOR EUROPE / US (6500) UPPER 000 ~ 255 FIXED BRIGHT POINT LOWER 000 ~ 255 FIXED CONTRAST UPPER 000 ~...
  • Page 26 TM-H1700G ADJUSTMENT Adjustment Item Test equipment Test points Adjustment procedure locations TP-91(B1) : B1 ADJUST VR 1. Set the power supply voltage to Checking of DC Voltmeter [MAIN PWB] (S1 ① ① ① ① pin) the B1 power AC230V± ± ± ± 5V (TM-H1700G/ supply AC120V±...
  • Page 27 TM-H1700G Must be input the composite video signal for adjusting the white balance. Set the aspect ratio to 4:3. There are no requirement for adjustment in the under scan mode and RGB / component signal mode. Adjustment Item Test equipment Test points Adjustment procedure locations...
  • Page 28 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations White Signal generator W06 R DRIVE Under the condition that Low light adjustment has Balance (Monoscope pattern) W07 B DRIVE been correctly finished. (High light) [SERVICE MENU] 1. Input the monoscope pattern signal. 9300K Colour temperature 2.
  • Page 29 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations 1. Input a PAL full colour bar signal. PAL CHROMA Signal generator TP-47B S03(PAL CHROMA) Saturation (Full colour bar) [SERVICE MENU] TP-E( 2. Connect the oscillo-scope probe to TP-47B and adjustment [CRT SOCKET TP-E(...
  • Page 30 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations 1. Input a NTSC 3.58 full colour bar signal. NTSC 3.58 Signal generator TP-47B S05 (NTSC PHASE) PHASE (Full colour bar) [SERVICE MENU] TP-E( 2. Connect the oscillo-scope probe to TP-47B and adjustment [CRT SOCKET TP-E( ).
  • Page 31 TM-H1700G DEFLECTION CIRCUIT ADJUSTMENT There are 2 kind of adjustment for the DEFLECTION circuit, PAL and NTSC. The adjustment using PAL signal is as the standard of all DEFLECTION adjustment. The “#” mark in the table given below expresses the number of each adjustment item. The screen aspect ratio 4 : 3 at 50Hz (PAL) is regarded as the reference value for all adjustments.
  • Page 32 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations 9. Input the PAL circle pattern signal. V. Center Signal generator D03 (V. CENTER) [SERVICE MENU] 10. Adjust D03 to agree with CRT center and signal Adjustment (Circle pattern) center of vertical direction. Only for PAL signal adjustment...
  • Page 33 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations 15. Input the crosshatch signal. V. Size Signal generator D04 (V. SIZE) 16. Select D04 item, and adjust it to become the Adjustment (Crosshatch pattern) [SERVICE MENU] vertical scan size to 95% . 100% Screen Picture...
  • Page 34 TM-H1700G Adjustment Item Test equipment Test points Adjustment procedure locations 22. Input the PAL circle pattern signal. Under scan Signal generator DD01 (H. CENTER) Horizontal (Circle pattern) DD02 (H. SIZE) 23. Select the under scan mode. Size [SERVICE MENU] 24. Select the DD01 and adjust it to the left and right Horizontal blanking width become equal.
  • Page 35: Purity Adjustment

    TM-H1700G PURITY, CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1. Demagnetize CRT with the demagnetizer. WEDGE DYNAMIC CONVERGENCE ADJUSTMENT 2. Loosen the retainer screw of the deflection yoke. PURITY MAGNET(P) 3. Remove the wedges. 4. Input a green raster signal from the signal generator, and turn the screen to green raster.
  • Page 36: Static Convergence Adjustment

    TM-H1700G STATIC CONVERGENCE ADJUSTMENT (FRONT VIEW) 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). 3. Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn Fig.
  • Page 37 TM-H1700G REPLACE OF THE 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 38: Self Diagnosis Function

    TM-H1700G SELF DIAGNOSIS FUNCTION 1. OUTLINE This model includes a SELF-DIAGNOSIS FUNCTION that checks the circuit operating status and in event of malfunction, displays and stores the data in a memory. The data are stored in an I ² C memory. Fault detection starts with the I ²...

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