Compaq CPQ-C1786FNSL Скачать руководство пользователя страница 23 | Manualshive

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Page 21

Troubleshooting

CPQ-C1786FNSL/T (FS7550/V7550)

6-2 OSD Abnormal

Put on

I502

Replace them

No

Check I502 pin 9, 4

is 5V and pin 5, 10, 7, 8

missing?

Check R517, L514,

R527, R523, R524

OK?

OSD Abnormal

Yes

No

No

Replace it

Yes

Yes

Check P502

OK?

Replace I502

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Содержание CPQ-C1786FNSL

Страница 1: ...17 inch Color Monitor CPQ C1786FNSL T FS7550 V7550 Service Manual...

Страница 2: ...nslated or converted to any electronic or machine readable form without prior written permission of LiteOn Technology Corp C1786FNSL T FS7550 V7550 Service Manual PrintedinTaiwan Trademarks LiteOn is...

Страница 3: ...roduct Specifications 5 3 Control Location and Functions 10 4 Operation Theory 11 5 Alignments and Adjustments 16 6 Troubleshooting 20 7 Recommended Spare Parts List 27 8 Block Diagram 29 9 Exploded D...

Страница 4: ...aximum rating never to exceed 1 1 2 Safety Checks Before returning the monitor to the user perform the following safety checks 1 Inspect to make certain that each lead dress is not pinched or that har...

Страница 5: ...emoving or installing any component or assembly disconnecting PCB plugs or connectors and connecting a test component in parallel with a capacitor 3 When replacing parts or circuit boards clamp the le...

Страница 6: ...d in regular period 2 Test Setup a Test duration 3 seconds b Set current limit at 25 A c The grounding resistance must be less than 0 1 ohm 3 Test Procedure a Plug the monitor power cord to the tester...

Страница 7: ...ositive or negative Synchronization Frequencies Horizontal 30 to 86 kHz Vertical 50 to 140 Hz Signal Connectors 15 pin D shell connector Video Signals Analog 0 7 Vp p RGB positive Power Input 75 Watts...

Страница 8: ...ent Pin Signal Pin Signal 1 Red video 9 5V 2 Green video 10 Digital Ground 3 Blue video 11 Ground 4 Ground 12 SDA 5 NC 13 H Sync 6 Red ground 14 V Sync VCL 7 Green ground 15 SCL 8 Blue ground Note Thi...

Страница 9: ...111 31 778 21 333 18 631 16 66 14 561 12 308 12 504 B Blanking us 6 356 6 35 5 33 6 356 5 172 4 409 3 657 3 725 3 191 3 023 C Sync us 3 813 2 032 1 556 3 813 1 616 1 138 1 219 1 016 1 094 1 067 D B P...

Страница 10: ...onitor meets the TCO 95 99 NUTEK energy saving electric and magnetic field requirements Also it is compliant with TCO 95 TCO 99 labelling scheme The emission from magnetic and electric field must comp...

Страница 11: ...among other things The monitor is also recyclable 3 Energy Requirements The monitor also follows the energy requirements that after a certain period of inactivity the monitor shall reduce its power c...

Страница 12: ...ON and OFF 3 3 Adjustment Procedure 1 Press 5 key to turn on the monitor 2 At normal condition press 2 key on the front panel to activate the on screen manager OSM menu 3 Press 3 or 4 key to highlight...

Страница 13: ...l horizontal and vertical auto sync capability 5 Software controlled auto shut off function activated if fH 29 kHz and fH 86 kHz 6 Full range AC input and simplified line filter design 4 2 Microcontro...

Страница 14: ...pin 7 and pin 6 of TDA4863 2 The TDA4863 has two output stages which are current driven in opposite phase and operate in combination with the deflection coil in a full bridge configuration 3 This IC i...

Страница 15: ...T pin 11 C481 R4F4 R4F8 R4F9 Q428 R4G0 Q431 R4G1 then through R302 to I401 pin 21 for V size compensation 4 3 9 Dynamic focus circuitry The dynamic focus is applied to improve the corner focus perform...

Страница 16: ...801 synchronized with horizontal sync input frequency 2 Power Saving Modes Standby Suspend Because there is no pulse from FBT so the free run frequency SMPS works at 20 kHz by I801 itself 3 Override T...

Страница 17: ...hodes cut off are adjusted by I503 LM2479 pin 8 7 6 which comes from I501 pin 16 15 14 to adjust cut iff voltage level by I2 C bus 5 Under override condition NO SIGNAL will show up on the screen 4 6 O...

Страница 18: ...1 Volt ohm A meter Sanwa FD 750C or equivalent 2 30 kV high voltage probe HP34111A 3 Oscilloscope TEK2235 or equivalent 4 Minolta Color Analyzer II 5 Signal generator IBM PC with proper display cards...

Страница 19: ...b Adjust R and B cutoff to min 1 c Adjust G cutoff to about 0 45FL 1 d Adjust B cutoff to get y 283 5 R cutoff to get x 297 5 and Y 0 65 0 05 FL 1 e Adjust brightness cutoff to raster 0 01 0 02 FL CON...

Страница 20: ...z Mode PROCEDURE 1 Set brightness to cutoff and contrast to maximum 2 Adjust focus 1 at T402 static focus VR to make vertical line clear 3 Adjust focus 2 at T402 static focus VR to make horizontal lin...

Страница 21: ...ntial that the field be gradually reduced by moving the coil slowly away from the monitor The degaussing coil must never be shut off or disconnected while near the monitor as this would introduce a st...

Страница 22: ...Grid 2 etc Check I401 I703 R719 C741 R4F6 R4F5 R4C4 Check I801 R807 R808 Q801 Q802 ZD802 VR801 Check D801 D802 D803 D804 T801 R804 F801 Yes No Normal 56 V 31 5 kHz Short Circuit at load Measure voltag...

Страница 23: ...PQ C1786FNSL T FS7550 V7550 6 2 OSD Abnormal Put on I502 Replace them No Check I502 pin 9 4 is 5V and pin 5 10 7 8 missing Check R517 L514 R527 R523 R524 OK OSD Abnormal Yes No No Replace it Yes Yes C...

Страница 24: ...01 No Check I701 and I703 missing Power ON OFF again and check X701 oscillator OK Function Key Abnormal Yes No No Replace I703 or do ATE again Yes Replace I701 and check uP OK Yes Check I703 EEPROM co...

Страница 25: ...izontal line Ckeck or replace I301 Check R312 R307 R306 R313 R308 R315 R316 Yes Check I301 voltage of pin 1 is 12V pin 4 is 11V pin 2 is 40V Check pin 5 O P waveform at I301 No Vertical Scan No Yes No...

Страница 26: ...resent at pin 15 of I401 Check I401 pin 8 H output frequency pin 29 waveform Out of Horizontal Synchronization No Yes No Check Q401 T401 Q402 R424 D401 6 6 Out of Vertical Synchronization Check signal...

Страница 27: ...Yes Check waveform at I501 pin 5 6 and 7 Check I502 pin 1 2 and 3 collector voltage normally about 70V waveform RGB Video AMP Abnormal Yes No Yes No Replace I502 Video signal present at the pin of th...

Страница 28: ...unction whenever the CPU is implemented The method of operation is as follows First press the and k000ey and hold it then turn on the monitor At this point of time the CPU is capable of detecting the...

Страница 29: ...6412021702 DIODE FE30 02BXF06 5 D810 6412004117 DIODE UF2004M 2A 200V 50 nS 6 D815 6412002617 DIODE UF3002M 3A 100V 50 nS 7 D817 6412024404 DIODE HER106 1A 600V 50 nS 8 F801 6851504053 FUSE TIME LAG...

Страница 30: ...Q451 6426006300 FET N CHNL IRFS634A FAIRCH 11d 29 R803 6203080017 POSISTOR OHM DGC2R08M 30 R804 6201100012 THERMISTOR 10 OHM 3A P 5 UEI 31 R802 6221127852 MOF OHM 0 27 1W J HOR 32 R4E3 6221227852 MOF...

Страница 31: ...ERTICAL O P I301 BLANKING CKT BRIGHTNESS CONTROL SPOT KILLER H DRIVER BRIGHTNESS H OUT DIODE MODULATE FBT STEP UP CKT D Y XRP 80V 150V 560V 6 6KV 115V V V H H P502 P501 25 6KV VTTL GND VIDEO 5 V O R 5...

Страница 32: ...LITE ON TECHNOLOGY CORP 5 F No 16 Sec 4 Nanking E Road Taipei Taiwan Tel 886 2 25706999 Fax 886 2 25706888 URL www liteontc com tw Printed in Taiwan...

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