JVC TM-H1700G/E Service Manual Download

Page: 27 / 38

No.51922

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.

Item

Test equipment

Test points

Adjustment

locations

Adjustment procedure

White
Balance
(Low light)
adjustment

Signal generator
(Monoscope pattern)

SCREEN VR

[Lower knob :

in FBT]

W01 R CUTOFF
W02 G CUTOFF
W03 B CUTOFF
[SERVICE MENU]

xxxx

Under the condition that B1 voltage adjustment
has been finished.

1. Input the monoscope pattern signal.
2. Select the WHITE BALANCE BLOCK mode from

<BLOCK SELECT> screen.

3. Confirm the initial setting value of W01, W02,

W03 in the SERVICE MENU are 50.

4. Select the CUTOFF adjustment mode.
5. Press “SERV” switch to display the single

horizontal line. Carefully adjust the SCREEN VR
to horizontal line appears faintly, not to shine
much.

6. Gradually turn the SCREEN VR from the left to

the right direction to bring one of the red, green
and blue colours faintly visible.

7. Then select the CUTOFF switch (R, G or B) that

colour except for appears first, and adjusting 2
colours CUTOFF values by pressing the +key,
and make horizontal line visible white.

8. Readjust the SCREEN VR to appear the

horizontal line faintly, and cancel the horizontal
line to press the “SERV” switch.

White
Balance
(High light)
6500K
adjustment

Signal generator
(Monoscope pattern)

Colour temperature
meter or Colour
Analyser

W04 R DRIVE
W05 B DRIVE
[SERVICE MENU]

xxxx

Under the condition that Low light adjustment has
been correctly finished.

1. Input the monoscope pattern signal.
2. Select the WHITE BALANCE BLOCK mode from

<BLOCK SELECT> screen.

3. Select the 6500 DRIVE adjustment mode (High

light 6500 mode).

4. Apply the sensor of the colour temperature meter

to the CRT surface, portion of the 100% white,
adjust the W04 (R DRIVE) or W05 (B DRIVE) to
setting 6500K (x=0.313, y=0.329).

5. Exit the SERVICE MENU by pressing the “EXIT”

key.

6. Check the white balance tracking is finest when

CONTRAST and BRIGHT are up and down.

Summary of Contents for TM-H1700G/E

Page 1: ...LTD TM H1700G E TM H1700G U CONTENTS SPECIFICATIONS 2 OPERATING INSTRUCTIONS APPENDIX 1 1 SAFETY PRECAUTIONS 3 SPECIFIC SERVICE INSTRUCTIONS 6 SERVICE ADJUSTMENTS 12 STANDARD CIRCUIT DIAGRAM APPENDIX 2 1 PARTS LIST 39 BASIC CHASSIS S1 SERVICE MANUAL COLOUR VIDEO MONITOR ...

Page 2: ... H1700G U Input output terminal Composite video signal BNC connector 2 1Vp p 75Ω negative sync 1 bridge connected output possible with automatic termination Input A Audio signal Monaural RCA pin 1 500mV rms High impedance 1 bridge connected output posible Composite video signal BNC connector 2 1Vp p 75Ω negative sync 1 bridge connected output possible with automatic termination Y C separate signal...

Page 3: ...e product 8 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 9 When service is required observe the original lead dress Extra precaution should be g...

Page 4: ...rer of the complete product 7 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resistor to the anode button 8 When service is required observe the original lead dress Extra preca...

Page 5: ...s are identified in the Parts List of Service Manual Electrical components having such features are identified by shading on the schematics and by on the Parts List in the Service Manual The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock fire or other hazards 4 The lea...

Page 6: ...the terminals with the terminal bracket 5 Remove the screw marked attached the terminal bracket with the chassis base 6 Remove the 2 hexagonal screws marked attached the D SUB terminal with the terminal bracket 7 As shown in Fig 1 lift the rear panel and remove the claw marked from the terminal bracket 8 Shift the top portion of the rear panel slightly rearward and raise it upward to remove it REM...

Page 7: ...RONT PANEL CRT SUB DEF PWB MAIN PWB SIGNAL INPUT PWB FRONT CONTROL PWB TERMINAL BRACKET EARTH WIRE LUG POWER CORD REAR PANEL BOTTOM COVER Fig 1 Fig 2 CRT SOCKET PWB Fig 3 MAIN POWER SWITCH SPEAKER CHASSIS BASE A A F D G A E C L M B K ...

Page 8: ...e bottom side pull it out to rearward to remove it REMOVING THE SPEAKER x Remove the top cover 1 Slightly spread the claws of the speaker holder and pull up the speaker to remove it A METHOD OF ERECTING THE CHASSIS BASE To check the PW board from back side 1 Remove the chassis base and the other PW boards 2 Erect the chassis base vertically so that you can easily check the PW board from back side ...

Page 9: ...ect the item and set the correct value 6 Adjust the front control items Adjust the CHROMA PHASE CONTRAST and BRIGHT Not all items can be adjusted as expected if the signal has not been input correctly in the adjustments 7 Confirm the items of SERVICE MENU Confirm the each item of the SERVICE MENU Refer to the corresponding page to operate the SERVICE MENU SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTIO...

Page 10: ...DISPLAY ON REMOTE SYSTEM MAKE INPUT REMOTE A B INITIAL SETTING VALUE OF THE MENU Setting item Setting content Range Initial setting value SHARPNESS 00 40 00 ADJ BAR POSI LOWER COLOUR TEMP 9300 COLOUR SYSTEM AUTO RUSH DELAY STD ASPECT RATIO 4 3 INITIAL SETTING OF FRONT PANEL CONTROLS Control item Initial setting value INPUT SELECT A UNDER SCAN OFF MENU OFF VOLUME 20 CONTRAST 00 BRIGHT 00 PHASE 00 C...

Page 11: ...on t change the values because all fixed ITEM INPUT SIGNAL CONTENTS ITEM CONTENTS W01 R CUTOFF C01 DESTINATION 0 For Japan 1 For Europe US W02 G CUTOFF C02 UPPER W03 B CUTOFF C03 BRIGHT POINT LOWER W04 R DRIVE 6500K C04 UPPER W05 B DRIVE 6500K C05 CONTRAST POINT LOWER W06 R DRIVE 9300K C06 UPPER W07 VIDEO COMPOSITE SIGNAL B DRIVE 9300K C07 CHROMA POINT LOWER W08 R CUTOFF C08 UPPER W09 G CUTOFF C09...

Page 12: ...a non metalic driver for adjusting there VRs The metalic driver can cause damage by shorting ADJUSTMENT ITEMS BASIC ADJUSTMENT Checking of B1 voltage Checking of High voltage Focus adjustment VIDEO CHROMA CIRCUIT ADJUSTMENT White Balance Low Light adjustment White Balance High Light 6500K adjustment White Balance High Light 9300K adjustment Bright adjustment Contrast adjustment PAL Chroma adjustme...

Page 13: ... 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 525VB W 0 SETUP BURST PAL 0 3Vp p NTSC 0 286Vp p 75 saturation Y C Separate signal colour bar Chroma Luminance 75 SATURATION CHROMA BURST RATIO C BURST NTSC 0 286Vp p PAL 0 3Vp p CHROMA LEVEL PAL 2 2 1 NTSC 2 3 1 0 525V B W 0 SETUP 75...

Page 14: ...CONTRAST BRIGHT CHROMA PHASE FUSE F901 L S CN004 CN003 A 1pin B1 TP 91 2pin NC 3pin X RAY2 4pin X RAY1 5pin TP E GND 6pin LB I B1 ADJ VR FBT POWER SW FRONT CONTROL PWB FRONT MAIN PWB FRONT SIGNAL INPUT PWB FFC WIRE TO CRT SOCKET PWB TO DEF YOKE TO MAIN POWER SWITCH SUB DEF PWB SPEAKER TO DEG COIL FOCUS1 SCREEN UPPER FOCUS2 MIDDLE LOWER ...

Page 15: ...EO A J002 J003 VIDEO B J004 J005 Y C IN J006 Y C OUT AUDIO A AUDIO B TP E TP 47G U T TP 47B E1 T MEMORY IC MICRO COMPUTER UPPER FRONT SOLDER SIDE CRT SOCKET PWB UPPER SIGNAL INPUT PWB REMOTE D SUB 15PIN CRT EARTH WIRE BRAIDED ASS Y TO MAIN PWB ...

Page 16: ...PERATION OF THE SERVICE MENU 1 HOW TO ENTER THE SERVICE MENU Press MENU key and VOLUME SELECT UP key simultaneously Fig 1 The letter S appears at the upper left of the screen Fig 2 While displaying the letter S press MENU key and CHROMA PHASE key simultaneously Fig 1 The screen display PLEASE DON T TOUCH Fig 3 WHILE displaying the letters above mentioned press VOLUME SELECT UP key or DOWN key to d...

Page 17: ... return to the BLOCK SELECT screen Again press MENU key then return to the normal screen The setting values are automatically memorized SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK BLOCK SELECT SIG CNTL EXIT W B DEF SIG CNTL EXIT W B DEF Function Display Front Panel Key Arrangement SIGNAL BLOCK Press CHROMA PHASE key Enter to signal circuit adjustment mode WHITE BALANCE BLOCK Pr...

Page 18: ...CT screen press the CONTRAST BRIGHT key Then WHITE BALANCE menu screen is displayed Fig 8 In this case key function is replaced as shown below There are several modes of WHITE BALANCE adjustment Select the various WHITE BALANCE mode from this menu screen Press the MENU key few times then exit from the WHITE BALANCE BLOCK screen to return to the BLOCK SELECT screen S01 EXIT DISP SIGNAL BLOCK S01 EX...

Page 19: ...ress the VOLUME SELECT key enter to 9300 DRIVE mode Whenever press the CHROMA PHASE key change the R DRIVE or B DRIVE adjustment mode CONTRAST BRIGHT key is the switch of the screen display If necessary you can shut off the display Carefully values of adjustment items are changed while shut off the screen display z Refer to the High Light adjustment corresponding page about detailed adjustment ste...

Page 20: ...en enter to the W01 adjustment mode Fig 13 Whenever press the CHROMA PHASE key change the adjustment mode from W01 to W24 And change the adjustment value by pressing the VOLUME SELECT or keys W01 EXIT DISP Select the service number Data operate inc dec key Adjustment mode exit key Function Display Front Panel Key Arrangement EACH ADJUSTMENT MODE W01 EXIT DISP Fig 13 Display on off switch ...

Page 21: ...no requirement for adjustment in this block Please not to change the values If you had changed the values you should put back the values by the method as following In the BLOCK SELECT screen press the VOLUME SELECT UP key Then the CONTROL BLOCK adjustment screen is displayed Fig 15 The original front key function replaced with the other function displayed at the lower side of the screen as shown b...

Page 22: ...DRIVE ADJUSTMENT W01 W24 ADJUSTMENT ITEM SELECT WHITE BALANCE BLOCK ITEM SELECT CUT OFF CUTO 6500 DRIVE 65 D 9300 DRIVE 93 D SIGNAL BLOCK WHITE BALANCE BLOCK DEFLECTION BLOCK CONTROL BLOCK BLOCK SELECT S01 SIG CNTL EXIT W B DEF CUTO W01 EXIT 65 D 93 D EXIT DISP D01 EXIT C01 EXIT RGB EXIT SERV R CUTOFF 9300 R DRIVE RGB EXIT DISP 6500 DRIVE ADJUSTMENT 6500 R DRIVE RGB EXIT DISP W01 EXIT DISP ...

Page 23: ...tribute Initial Value W01 R CUTOFF 000 255 ABSOLUTE 050 W02 G CUTOFF 000 255 ABSOLUTE 050 W03 B CUTOFF 000 255 ABSOLUTE 050 W04 R DRIVE 6500 000 127 ABSOLUTE 080 W05 B DRIVE 6500 000 127 ABSOLUTE 048 W06 R DRIVE 9300 000 127 ABSOLUTE 065 W07 VIDEO B DRIVE 9300 000 127 ABSOLUTE 055 W08 R CUTOFF 128 000 127 OFFSET 000 W09 G CUTOFF 128 000 127 OFFSET 000 W10 B CUTOFF 128 000 127 OFFSET 000 W11 R DRIV...

Page 24: ...1 DB8 16 9 NORMAL 50Hz E W CORNER 032 000 031 OFFSET 002 DC1 HORIZONTAL POSITION 032 000 031 OFFSET 000 DC2 HORIZONTAL SIZE 064 000 063 OFFSET 000 DC3 VERTICAL POSITION 128 000 127 OFFSET 000 DC4 VERTICAL SIZE 128 000 127 OFFSET 030 DC5 VERTICAL LINEARITY 032 000 031 OFFSET 000 DC6 VERTICAL S CORRECTION 064 000 063 OFFSET 000 DC7 E W PARABOLA 064 000 063 OFFSET 021 DC8 16 9 NORMAL 60Hz E W CORNER ...

Page 25: ...0 FIXED 000 C11 OSD VERTICAL FREQUENCY 50Hz 000 010 FIXED 004 C12 OSD VERTICAL FREQUENCY 60Hz 000 010 FIXED 002 C13 HORIZONTAL CENTER RGB 128 000 127 OFFSET 007 C14 HORIZONTAL CENTER COMPONENT 128 000 127 OFFSET 002 C15 BRIGHT SERVICE 000 127 FIXED 000 C16 SHARPNESS CENTER 000 127 FIXED 024 C17 HVT H 000 007 FIXED 004 C18 HVT V 000 007 FIXED 003 C19 HVT H UNDER SCAN 000 007 FIXED 004 C20 HVT V UND...

Page 26: ... voltage meter CRT Anode SCREEN VR Lower knob in FBT 1 Set the power supply voltage to AC230V 5V TM H1700G E AC120V 5V TM H1700G U 2 Select WHITE BALANCE BLOCK mode from BLOCK SELECT screen 3 Select CUTOFF adjustment mode Low light mode 4 Press SERV switch to display the horizontal line 5 Adjust the SCREEN VR to disappear the horizontal line 6 Connect the high voltage meter to the CRT anode and ch...

Page 27: ...EN VR from the left to the right direction to bring one of the red green and blue colours faintly visible 7 Then select the CUTOFF switch R G or B that colour except for appears first and adjusting 2 colours CUTOFF values by pressing the key and make horizontal line visible white 8 Readjust the SCREEN VR to appear the horizontal line faintly and cancel the horizontal line to press the SERV switch ...

Page 28: ...g is finest when CONTRAST and BRIGHT are up and down Bright adjustment Signal generator Sprit colour bar S01 BRIGHT SERVICE MENU x x x x Under the condition that Low light adjustment has been correctly finished 1 Input a sprit colour bar signal 2 Select the SIGNAL BLOCK mode from BLOCK SELECT screen 3 Select the S01 item 4 Adjust the S01 to where the sprit colour bar 0 black component faintly brig...

Page 29: ...S03 item 5 Adjust the S03 to become the voltage different between 75 white and blue to 0V 2Vp p as shown in figure NTSC 3 58 CHROMA Saturation adjustment Signal generator Full colour bar Oscillo scope TP 47B TP E CRT SOCKET PWB S04 NTSC CHROMA SERVICE MENU 1 Input a NTSC 3 58 full colour bar signal 2 Connect the oscillo scope probe to TP 47B and TP E 3 Select the SIGNAL BLOCK mode from BLOCK SELEC...

Page 30: ...lo scope TP 47B TP E CRT SOCKET PWB S05 NTSC PHASE SERVICE MENU 1 Input a NTSC 3 58 full colour bar signal 2 Connect the oscillo scope probe to TP 47B and TP E 3 Select the SIGNAL BLOCK from SERVICE MENU 4 Select the S05 item 5 Adjust the S05 to become the voltage different between 75 white and magenta to 0V 2Vp p as shown in figure BL B R Mg G Cy Y W 75 0V 2V ...

Page 31: ...t points Adjustment locations Adjustment procedure H Center H Size Adjustment Signal generator Crosshatch pattern D01 H CENTER D02 H SIZE SERVICE MENU 1 Input a crosshatch pattern signal 2 Select DEFLECTION BLOCK mode from BLOCK SELECT screen 3 Select D01 item 4 Adjust D01 to align the picture center with the CRT center 5 Adjust D02 to set horizontal size to 95 6 Repeat above step 4 and 5 to adjus...

Page 32: ...04 V SIZE D05 V LIN D06 V S COR SERVICE MENU 11 Input the PAL circle pattern signal 12 Select the D04 to adjust the vertical size become 100 13 Select the D05 and reference to the below figure adjust it to become correctly about vertical size and vertical linearity 14 Select D06 and adjust it to the circle pattern becomes the true circle at top and bottom of the screen Top extension Correct adjust...

Page 33: ...r Circle pattern DB04 V SIZE SERVICE MENU 17 Input the PAL circle pattern signal 18 Switch the aspect ratio to the 16 9 mode 19 Adjust the DB04 to the vertical size become the value given below 16 9 Side pincushion Adjustment Signal generator DB07 E W PARABOLA DB08 E W CORNER SERVICE MENU 20 Confirm the side pincushion of the four corners in the screen 21 If not optimum adjust the DB07 and DB08 to...

Page 34: ...VICE MENU 26 Confirm the side pincushion of the four corners in the screen 27 If not optimum adjust the DD07 and DD08 to become correctly 28 If the warps are happened by adjust the side pincushion readjust the above mentioned DD01 and DD02 16 9 Under scan Side pincushion Adjustment Signal generator Crosshatch pattern DF07 E W PARABOLA DF08 E W CORNER SERVICE MENU 29 Switch the aspect ratio to the ...

Page 35: ...Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Input a crosshatch signal 11 Verify that the screen is horizontal 12 Input red and blue raster signals and make sure that purity is properly adjusted P PURITY MAGNET 4 4 POLES convergenc...

Page 36: ...ve the deflection yoke left to right to overlap the lines in the periphery and match the Yv VR1 As shown in Fig 4 3 Using the VR1 on the deflection yoke match the YH CROSS See Fig 3 and 6 4 Using the VR2 on the deflection yoke match the YH BOW See Fig 3 and 6 5 Repeat the steps 1 and 4 and obtain an optimum convergence 6 Differential XV coil ADJUSTMENT In case where the horizontal lines of red and...

Page 37: ...rs and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part Note After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as indicated i...

Page 38: ... at this time POWER LED flashes CAUSE LED FLASHING CYCLE X RAY PROTECTOR Quickly 0 1 sec on 0 1 sec off cycles OVER CURRENT PROTECTOR Slowly 1 0 sec on 1 0 sec off cycles SELF DIAGNOSIS FUNCTION mode release Turn the power switch to off or disconnect the power plug from AC outlet In this way not to clear the error counts Reset the error count 1 While press the MENU key and CHROMA PHASE key simulta...

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