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1. NO POWER

NO POWER

(POWER INDICATOR OFF)

TROUBLE IN
D901

TROUBLE IN FUSE
(F901)

TROUBLE IN
IC901, IC902
Q901 or Q902

TROUBLE IN
D909, D912~D916

TROUBLE IN

IC904 or IC905

CHECK

FUSE OK?

CHECK

C907 VOLTAGE?

(AC120V : 170VDC,

AC220V : 310VDC)

NO

YES

YES

YES

YES

NO

NO

NO

- 17 -

CHECK

IC901 PIN 1 WAVEFORM

(SQUARE WAVE COMES

OUT?)

CHECK

D909, D912, D913,

D914, D915, D916

VOLTAGE?

TROUBLE-SHOOTING GUIDE

«
...
14
15
16
17
18
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Summary of Contents for CS770

Page 1: ... 264V Free Voltage 50 60Hz 1 5A Max 3 2 POWER CONSUMPTION 4 DISPLAY AREA 4 1 Active Video Area 300 mm X 225 mm Available for Full Screen 4 2 Display Color Full Colors 4 3 Display Resolution 1280 Dots X 1024 Lines Non Interlace 4 4 Video Bandwidth 100 MHz 5 ENVIRONMENT 5 1 Operating Temperature 10 35 C Ambient 5 2 Relative Humidity 8 80 Non Condensing 5 3 Altitude 10 000 ft 6 DIMENSIONS WITH TILT S...

Page 2: ...riginal design Soldering must be inspected for the cold solder joints frayed leads damaged insulation solder splashes or the sharp points Be sure to remove all foreign materials IMPLOSION PROTECTION All used display tubes are equipped with an integral implosion protection system but care should be taken to avoid damage and scratching during installation Use only same type display tubes X RADIATION...

Page 3: ...333 16 162 5 171 0 323 1 616 3 232 75 000 13 333 12 800 0 533 0 021 0 064 0 448 800 600 Yes MODE5 56 476 17 707 13 653 4 053 0 320 1 813 1 920 70 069 14 272 13 599 0 672 0 053 0 106 0 513 1024 768 Yes MODE 6 60 023 16 660 13 003 3 657 0 203 1 219 2 235 75 029 13 328 12 795 0 533 0 017 0 050 0 466 1024 768 Yes MODE7 63 981 15 630 11 852 3 778 0 444 1 037 2 296 60 020 16 661 16 005 0 656 0 016 0 047...

Page 4: ... screen brightness level OSD SELECT ADJUSTMENT To select or adjust OSD menus OPERATING INSTRUCTIONS 5 FRONT VIEW OSD ON OFF Enter button OSD Select Adjustment Control AC Power Socket D Sub Signal Connector ID Label Brightness Adjustment Control Contrast Adjustment Control Power DPMS Indicator REAR VIEW Power ON OFF Switch Front Control Panel All functions are adjusted from the microprocessor based...

Page 5: ...rn to Main Menu 1 and rotate the Adjustment Control knob to make another selection If you have finished using the OSD after you have returned to Main Menu 1 you can double click the Enter button or wait 4 5 seconds exit the OSD OSD Adjustment and Selection Items In the previous section you were introduced to the procedure of selecting and adjusting an item using the OSD There are four Main Menu pa...

Page 6: ... Ref No SW206 SW205 SW204 SW203 SW202 VR201 SW201 Ref No VR901 VR702 VR701 VR501 SW701 VR302 VR301 Control Function POWER SWITCH CONTRAST INCREASE CONTRAST DECREASE BRIGHTNESS INCREASE BRIGHTNESS DECREASE OSD SELECT ENTER Control Function B ADJUSTMENT H LIN ADJUSTMENT HIGH VOLTAGE ADJUSTMENT SUB BRIGHT ADJUSTMENT H RASTER CENTER SW R CUT OFF R BIAS G CUT OFF G BIAS 7 CONTROL LOCATIONS ...

Page 7: ...P901 P501 Signal Cable AC Socket P403 P401 P402 P404 W3 W2 P601 P701 P201 P202 P203 SW701 P304 P305 P303 FBT P302 P301 8 WIRING DIAGRAM ...

Page 8: ...P901 P501 Signal Cable AC Socket P403 P401 P402 P404 W3 W2 P601 P701 P702 P201 P202 P203 SW701 P304 P305 P303 FBT P302 P301 9 WIRING DIAGRAM TCO 92 ...

Page 9: ...Disconnect P901 Degaussing pin P701 H DY pin and P601 V DY pin Remove two screws from the Rear Bracket to remove the Ground Wire of the CRT Remove two screws from the Main Bracket to separate it from the Front Cabinet 4 CRT BOARD ASSEMBLY REMOVAL Remove three pins Remove CRT ground connector Carefully separate the CRT Board Assembly from the CRT neck Discharge the remaining static electricity by s...

Page 10: ... 5 BOTTOM BRACKET REMOVAL Remove five screws Remove the Bottom Bracket 6 MAIN BOARD ASSEMBLY REMOVAL Remove five screws Remove three screws Release four latches from the Main Board Assembly Bottom Bracket ...

Page 11: ...BLOCK DIAGRAM 12 ...

Page 12: ...protection pin of IC701 TDA4855 then B DRV Pin 6 function of this IC will be shut down so high voltage will not be generated In the normal state the high voltage is about 25kV 6 Micom Microprocessor Circuit The operating procedure of the Micom Microprocessor and its associated circuit is as follows 1 HandV sync signal is supplied from the signal cable 2 The Micom IC401 distinguishes polarity and f...

Page 13: ...t is used for control of the screen brightness by changing the DC level of G1 18 Image Rotation Circuit This circuit corrects the tilt of the screen by supplying the image rotation signal to the tilt coil which is attached to the CRT near the deflection yoke 19 OSD Circuit This circuit is used for performing the OSD On Screen Display function When a user selects the Enter button and OSD Select Adj...

Page 14: ...V with VR901 2 Adjustment for the HIGH VOLTAGE Display cross hatch pattern at Mode 7 Adjust D713 cathode voltage to 41 0 5V with VR701 3 Adjustment for the Horizontal Raster Center Display cross hatch pattern at Mode 7 Adjust the raster should be center of the screen with SW701 4 Adjustment for the Screen Image Display cross hatch pattern at Mode 1 Adjust H SIZE as arrow keys to 300 2mm Adjust H P...

Page 15: ...6 Figure 1 Cable Connection Adjust SUB CONTRAST 2 to 55 1FL of the box pattern luminance Display color 15 0 full white patten at Mode 7 Adjust ABL to 30 1FL of the luminance Exit from the program 6 Adjustment for the Focus Set the Brightness and Contrast to max position Display H character in full screen at Mode 7 Adjust Focus control on the FBT that focus should be the best condition ...

Page 16: ...IN IC901 IC902 Q901 or Q902 TROUBLE IN D909 D912 D916 TROUBLE IN IC904 or IC905 CHECK FUSE OK CHECK C907 VOLTAGE AC120V 170VDC AC220V 310VDC NO YES YES YES YES NO NO NO 17 CHECK IC901 PIN 1 WAVEFORM SQUARE WAVE COMES OUT CHECK D909 D912 D913 D914 D915 D916 VOLTAGE TROUBLE SHOOTING GUIDE ...

Page 17: ...1 PIN 2 4 6 CHECK IC301 PIN 15 19 22 CHECK R G B CATHODE VOLTAGE CHECK IC302 PIN 1 6 8 TROUBLE IN P303 12V LINE TROUBLE IN PC SIGNAL P302 SIGNAL CABLE TROUBLE IN IC301 TROUBLE IN Q301 Q302 Q303 TROUBLE IN D307 D312 Q304 Q307 TROUBLE IN CRT SOCKET NO YES NO NO YES YES YES YES NO NO ...

Page 18: ... POWER INDICATOR GREEN or ORANGE BLINKING CHECK D713 CATHODE VOLTAGE 41V CHECK G1 VOLTAGE 10 20V TROUBLE IN Q712 TROUBLE IN Q503 TROUBLE IN Q501 Q502 NO DPM MODE NO H and or V Sync ORANGE OR BLINKING NO GREEN YES YES NO 19 3 NO RASTER ...

Page 19: ...K Q708 CHECK B VOLTAGE 175V CHECK Q510 EMITTER WAVE FORM CHECK T702 PIN 4 B VOLTAGE TROUBLE IN Q708 D705 TROUBLE IN 175V LINE TROUBLE IN Q509 Q510 TROUBLE IN Q511 TROUBLE IN L502 T702 P701 NO NO YES YES YES YES NO NO 4 NO HORIZONTAL DEFLECTION ...

Page 20: ... EMITTER VOLTAGE TROUBLE IN IC401 MICOM TROUBLE IN Q716 Q721 TROUBLE IN IC703 Q722 R762 TROUBLE IN L703 D717 NO NO YES YES YES NO 5 TROUBLE IN H LINEARITY HORIZONTAL Cs 0 Cs 1 Cs 2 FREQUENCY f 30 33kHz L L L 33 1 43kHz L H L 43 1 52kHz H H L 52 1 60kHz H L H 60 1 67kHz H H H Cs SIGNAL TABLE H ...

Page 21: ...LINE 22 CHECK IC601 PIN 3 15V CHECK IC601 PIN 7 40V CHECK IC701 PIN 12 13 TROUBLE IN R608 15V LINE TROUBLE IN HIGH VOLTAGE OUT CIRCUIT D713 TROUBLE IN IC701 TROUBLE IN IC601 V CIRCUIT NO NO YES YES YES NO 6 NO VERTICAL DEFLECTION 3V ...

Page 22: ...ECTOR WAVEFORM CHECK ABL OUT VOLTAGE CHECK IC301 PIN 13 TROUBLE IN IC402 Q403 ABL OUT VOLTAGE 11V AT BLACK PATTERN TROUBLE IN Q713 Q714 Q715 TROUBLE IN IC301 TROUBLE IN CONTRAST LINE NO NO YES DC 0 8 3 5V YES YES NO 7 NO CONTRAST 4v ...

Page 23: ...N 19 20 21 NO OSD TROUBLE IN 5V LINE TROUBLE IN IC601 PIN 8 V BLK T702 H FBP LINE TROUBLE IN IC402 IC301 TROUBLE IN IC402 IC301 CHECK IC402 B NO YES DC 5V YES YES YES CHECK IC402 PIN 4 5 WAVEFORM 8 TROUBLE IN OSD NO NO NO Pin 4 5V Pin 5 5V H V 5V H V SELECT BUTTONS MUST BE PRESSED ...

Page 24: ...N X401 IC402 TROUBLE IN IC401 MICOM TROUBLE IN Q905 Q906 Q907 Q908 Q914 TROUBLE IN PC OFF MODE FAILURE INPUT H V SYNC SIGNAL NO H V SYNC NO OFF MODE NO NO NO DPM 5V DPMS TABLE Mode Item NORMAL STAND BY SUSPEND OFF H V SYNC ON ON OFF ON ON OFF OFF OFF LED GREEN GREEN ORANGE BLINKING ORANGE VIDEO NORMAL OFF OV OFF OV OFF OV 9 TROUBLE IN DPM 25 YES NORMAL 5V DPM 0 2V YES YES 5V 8MHz ...

Page 25: ...ECTOR VOLTAGE CHECK P901 CHECK RL901 TROUBLE IN IC401 MICOM TROUBLE IN Q912 Q913 TROUBLE IN P901 TROUBLE IN RL901 TROUBLE IN TH902 DEGAUSSING COIL NO DEGAUSSING DC 0 2V BUTTON MUST BE PRESSED NO NO NO NO 10 NO DEGAUSSING 26 YES YES YES YES ...

Page 26: ...ROUBLE IN IC401 MICOM TROUBLE IN 6 3V LINE D712 CATHODE VOLTAGE TROUBLE IN IC502 TROUBLE IN P501 TILT COIL CHECK IC502 PIN 1 VOLTAGE NO YES YES YES CHECK IC502 B 6 3V B 10V CHECK IC502 PIN 4 VOLTAGE 11 NO TILT ROTATION NO NO ...

Page 27: ...PRINTED CIRCUIT BOARD 1 MAIN BOARD Component Side ...

Page 28: ...2 MAIN BOARD Solder Side ...

Page 29: ... 30 3 VIDEO BOARD Component Side 4 VIDEO BOARD Solder Side ...

Page 30: ... 31 5 CONTROL BOARD Component Side 6 CONTROL BOARD Solder Side ...

Page 31: ...SSING COIL BRACKET SIDE TOP LEFT BRACKET SIDE TOP RIGHT BRACKET SIDE BOTTOM RIGHT BRACKET SIDE BOTTOM LEFT SCREW PHP 5 30 BP GW18 BRACKET VIDEO FRONT PCB ASS Y VIDEO FOR USA CAN PCB ASS Y VIDEO FOR EUROPE AUS JAPAN PCB ASS Y VIDEO FOR MEXICO PCB ASS Y VIDEO FOR TCO 92 METAL ASS Y VIDEO REAR SHIELD SCREW MP 3 8 FOR VIDEO BRACKET DEGAUSSING COIL CRT GROUND PCB ASS Y MAIN FOR USA CAN PCB ASS Y MAIN F...

Page 32: ... MEXICO PCB ASS Y CONTROL FOR TCO 92 BRACKET BOTTOM SHELD SCREW PTP 4 20 BACK COVER SCREW PTP 4 30 TILT SWIVEL ASS Y WIRE GROUND FOR TCO 92 MODEL ONLY CHASSIS ASS Y VIDEO FOR USA CAN CHASSIS ASS Y VIDEO FOR EUROPE AUS JAPAN CHASSIS ASS Y VIDEO FOR MEXICO CHASSIS ASS Y VIDEO FOR PANAMA CHASSIS ASS Y VIDEO FOR TCO 92 CHASSIS ASS Y REAR D SUB CHASSIS ASS Y TOTAL FOR USA CAN CHASSIS ASS Y TOTAL FOR EU...

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