Compaq CRT Monitor s7500 Service Manual Download Page 12 | Manualshive

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TROUBLESHOOTING GUIDE

1. NO POWER

NO POWER

(POWER INDICATOR OFF)

TROUBLE IN
D900

TROUBLE IN FUSE
(F901)

TROUBLE IN
IC901

TROUBLE IN
D941, D942, D951,
D961, D962, D971

TROUBLE IN

Q903, Q952,

Q951, Q942, Q941

CHECK

FUSE OK?

CHECK

C908 VOLTAGE?

(AC120V: 160VDC,

AC220V: 304VDC)

NO

YES

YES

YES

YES

NO

NO

NO

CHECK

IC901 PIN 6

WAVEFORM

(SQUARE WAVE

COMES OUT?)

CHECK

D941, D942, D951, D961,

D962, D971
VOLTAGE?

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Summary of Contents for CRT Monitor s7500

Page 1: ...mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Colore alTM MODEL S7500 PE1165T S7500 PE1165 MV7500 PE1165U MV7500 PE1165 CV7500 PE1165U CHASSIS NO CA 110 FACTORY MODEL CQ771G ID LABEL Model No ...

Page 2: ...312 x 234 mm 12 28 x 9 21 4 2 Display Color Full Colors 4 3 Display Resolution 1280 x 1024 60Hz Non Interlace 4 4 Video Bandwidth 110 MHz 5 ENVIRONMENT 5 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 5 2 Relative Humidity 8 80 Non condensing 5 3 Altitude 5 000 m 6 DIMENSIONS with TILT SWIVEL Width 404 0 mm 15 90 inch Depth 438 5 mm 17 26 inch Height 426 0 mm 16 77 inch 7 WEIGHT with TILT SWI...

Page 3: ...sign 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 The only ...

Page 4: ...4 222 4 409 1 138 2 702 0 569 V 85 061 11 756 11 178 0 578 0 056 0 503 0 019 H 60 023 16 660 13 003 3 657 1 219 2 235 0 203 V 75 029 13 328 12 795 0 533 0 050 0 466 0 017 H 68 677 14 561 10 836 3 725 1 061 2 201 0 508 V 84 997 11 765 11 183 0 582 0 044 0 523 0 015 H 63 98 15 63 11 85 3 78 1 04 2 30 0 44 V 60 02 16 661 16 005 0 656 0 047 0 594 0 015 Mode H V Sort 1 2 3 4 5 6 7 8 9 Dot Clock MHz Hor...

Page 5: ...ough menu options or increases adjustment levels 3 Left Adjustment Moves counter clockwise through menu options or decreases adjustment levels 4 Select Launches on screen displays selects functions and adjustments and exits menus and On Screen Display 5 Hot Key Left Adjustment Just select left adjustment key without OSD display Contrast menu display Right adjuatment Just select right adjustment ke...

Page 6: ...WIRING DIAGRAM 6 P501 P201 P405 P301 P302 P303 P702 P701 T1 P402 P902 S S Signal Cable AC Socket FBT ...

Page 7: ... C DATA SDA I 2 C CLOCK SCL VIDEO LM1269 PRE AMP IC302 Signal Cable R G B VIDEO LM2467 LM2480 CUT OFF IC IC304 MAIN AMP IC303 5V 5V H V Sync Processor IC701 TDA4857 V OUT IC601 TDA4866 H OUT Q706 H Linearity Correction DC DC Converter X RAY Protection Circuit FBT T701 Dynamic Focus Circuit Auto Beam Limit Vertical Blanking Brightness Control 160V 40V 400V STEP UP 15V D D Feed Back 15V MICOM IC401 ...

Page 8: ...ated circuit is as follows 1 H and V sync signal is supplied from the signal cable 2 The Micom IC401 distinguishes polarity and frequency of H and V sync 3 The Micom sets operating mode and offers the controlled data H size H position V size etc 4 The controlled data of each mode is stored in itself 5 User can adjust screen condition by each OSD function The data of the adjusted condition is store...

Page 9: ...ar the deflection yoke of the CRT 17 OSD Circuit This circuit is used for performing the OSD On Screen Display function When a user selects the OSD Select Adjustment control the adjustment status displays on the screen 18 Video Pre Amp Circuit This circuit amplifies the analog video signal from 0 0 7V to 0 4V It is operated by taking the clamp R G B drive and contrast signal from the Micom IC401 1...

Page 10: ...and color data will be erased 4 Power button of the monitor turn off turn on 5 COMMAND PRESET START Y Yes command 6 DIST ADJ CTRL PWM TILT command 7 Adjust tilt as arrow keys to be the best condition 8 DIST ADJ BALANCE command 9 Adjust parallelogram as arrow keys to be the best condition 10 Adjust balance of pin balance as arrow keys to be the best condition 11 DIST ADJ FOS ADJ command 12 Adjust V...

Page 11: ...ull white patten at Mode 8 20 Set Brightness and Contrast to Max position 21 COLOR ADJ LUMINANCE ABL command 22 Adjust ABL to 33 1FL of the luminance at B Raster 0 06FL 23 After push the ENTER key and COMMAND PRESET EXIT Y Yes command 24 Exit from the program 5 Input EDID Data 1 Display color 15 0 cross hatch pattern at Mode 8 2 EEPROM Write EDID command and confirm EDID Write OK message of monito...

Page 12: ...E IN FUSE F901 TROUBLE IN IC901 TROUBLE IN D941 D942 D951 D961 D962 D971 TROUBLE IN Q903 Q952 Q951 Q942 Q941 CHECK FUSE OK CHECK C908 VOLTAGE AC120V 160VDC AC220V 304VDC NO YES YES YES YES NO NO NO CHECK IC901 PIN 6 WAVEFORM SQUARE WAVE COMES OUT CHECK D941 D942 D951 D961 D962 D971 VOLTAGE ...

Page 13: ...IN 1 2 3 CHECK IC303 PIN 4 80V PIN 8 12V TROUBLE IN P302 5V LINE TROUBLE IN PC SIGNAL P301 SIGNAL CABLE TROUBLE IN IC302 TROUBLE IN P303 12V LINE 80V LINE TROUBLE IN IC303 NO YES NO NO YES YES YES YES NO NO CHECK R G B CATHODE VOLTAGE TROUBLE IN R341 R343 R331 R333 L311 L313 D307 D312 TROUBLE IN CRT SOCKET YES NO ...

Page 14: ...CHECK POWER INDICATOR GREEN or AMBER CHECK D712 ANODE 157V CHECK G1 VOLTAGE 55V 150V TROUBLE IN D712 TROUBLE IN Q799 DPM MODE NO H and or V SYNC AMBER NO GREEN YES NO CHECK CDT HEAT VOLTAGE 6 3V TROUBLE IN D941 Q942 Q941 YES NO TROUBLE IN CDT YES ...

Page 15: ...E VERTICAL LINE CHECK Q706 CHECK B VOLTAGE 50V CHECK T701 FBT PIN 2 31KHZ 60V 69KHZ 140V CHECK Q701 COLLECTOR WAVEFORM TROUBLE IN Q706 TROUBLE IN 50V LINE TROUBLE IN Q719 Q720 D710 TROUBLE IN Q701 TROUBLE IN T701 P701 NO NO YES YES YES YES NO NO 0V T ...

Page 16: ...OM TROUBLE IN Q711 Q716 TROUBLE IN L703 TROUBLE IN C722 C723 C726 C729 NO NO NO YES YES YES Cs SIGNAL TABLE HORIZONTAL FREQUENCY fH 30K 33 9K 34K 38 9K 39K 43 9K 44K 47 9K 48K 51 9K 52K 57 9K 58K 61 9K 62K 65 9K 66K 70K Cs1 L L H H H H H H H Cs3 L L L H H L L H H Cs0 255 155 130 100 85 70 60 60 30 Cs2 L H L L L H H H H ...

Page 17: ...FLECTION ONE HORIZONTAL LINE CHECK IC601 PIN 3 15V CHECK IC601 PIN 7 40V CHECK IC701 PIN 12 13 TROUBLE IN R603 15V LINE TROUBLE IN HIGH VOLTAGE OUT CIRCUIT FBT D721 R606 TROUBLE IN IC701 TROUBLE IN IC601 V CIRCUIT NO NO YES YES YES NO 3V ...

Page 18: ...OUBLE IN IC601 PIN8 V FBP T701 40V LINE H FBP TROUBLE IN IC302 IC301 TROUBLE IN IC301 IC302 NO YES DC 5V YES YES YES NO NO NO Pin 5 5V Pin 10 5V H V 5V H V CHECK IC301 B 5V CHECK IC301 PIN 12 WAVEFORM ENTER BUTTON MUST BE PRESSED CHECK IC301 PIN 5 10 WAVEFORM CHECK IC301 PIN 13 14 15 ...

Page 19: ...5V 80V CHECK PC PC IS NOT GOING INTO DPM OFF MODE TROUBLE IN X401 TROUBLE IN IC401 MICOM TROUBLE IN Q941 Q942 Q951 Q952 TROUBLE IN PC OFF MODE FAILURE INPUT H V SYNC SIGNAL H V SYNC NO OFF MODE NO NO NO NO DPMF 0V DPM TABLE Mode Item NORMAL STAND BY SUSPEND OFF LED GREEN AMBER AMBER AMBER YES YES SEE DPM TABLE YES YES 5V 24MHz DPMF H L L L ...

Page 20: ...HECK Q953 COLLECTOR VOLTAGE CHECK P902 CHECK RL901 TROUBLE IN IC401 MICOM TROUBLE IN Q953 TROUBLE IN P902 TROUBLE IN RL901 TROUBLE IN TH901 DEGAUSSING COIL NO DEGAUSSING DC 15V NO NO NO NO YES YES YES YES DEGAUSS ON THE OSD MENU MUST BE PRESSED ...

Page 21: ...NO TILT NO ROTATION TROUBLE IN IC401 MICOM TROUBLE IN 15V LINE 6 3V LINE TROUBLE IN Q501 Q503 TROUBLE IN P501 TILT COIL D521 NO YES YES YES CHECK 15V LINE AND 6 3V LINE CHECK Q503 EMITTER VOLTAGE NO NO CHECK IC401 PIN21 WAVE FORM ...

Page 22: ...EXPLODED VIEW 22 8 B A 2 1 4 3 11 11 6 7 5 10 12 13 9 ...

Page 23: ...CDT CIRC M41LFQ803X55NLAA LG PHILIPS 70KHZ 29 1MM FST MPR II S7500 PE1165 Northern Hemisphere CDT CIRC M41LFQ803X 55QLAA LG PHILIPS 70KHZ 29 1MM FST MPR II S7500 PE1165 Equatorial CDT CIRC M41LFQ803X 55SLAA LG PHILIPS 70KHZ 29 1MM FST MPR II S7500 MV7500 PE1165 Southern Hemisphere CDT CIRC M41LFQ503X 55NLLD LG PHILIPS 70KHZ 29 1MM FST CV7500 MV7500 PE1165U Northern Hemisphere CDT CIRC M41LFQ503X 5...

Page 24: ...TR C401 0CN1040K949 0 1M 50V Z F TA52 C402 0CE476CF638 47UF SHL SD 16V M FM5 TP 5 C403 0CK1040K945 0 1UF 50V Z F TR C404 0CC1800K415 18P 50V J NPO TP C405 0CC1800K415 18P 50V J NPO TP C406 0CK1010K515 100PF 50V K B TR C407 0CK1010K515 100PF 50V K B TR C408 0CK1040K945 0 1UF 50V Z F TR C409 0CC5600K415 56P 50V J NP0 TP C410 0CK1010K515 100PF 50V K B TR C411 0CK1040K945 0 1UF 50V Z F TR C412 0CK1040...

Page 25: ...D201 0DL305029BA LTL 305DJ 0C2 TP LITEON GREEN D301 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D302 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D303 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D304 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D305 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D306 0DS141489AB 1N4148 TP GRANDE DO 34 500MW 1 D307 0DS124409AA 1SS244 TP ROHM KOREA D308 0DS124409AA 1SS244 TP ...

Page 26: ...6210TCE003A BRD3510B BO SUNG 3510MM RADIAL FB311 6210TCZ001J BAS3550T0 125 022J BO SUNG RH FB312 6210TCZ001J BAS3550T0 125 022J BO SUNG RH DATE 2002 04 15 S AL LOC NO PART NO DESCRIPTION SPECIFICATION FB313 6210TCZ001J BAS3550T0 125 022J BO SUNG RH FB314 6210TCE003J BAS2550T BO SUNG 2550MM AXIAL5 FB401 6210TCE003J BAS2550T BO SUNG 2550MM AXIAL5 FB402 6210TCE003J BAS2550T BO SUNG 2550MM AXIAL5 FB40...

Page 27: ...5 TA52 R431 0RD1000Q609 100 1 4W 3 5 TA52 DATE 2002 04 15 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R432 0RD1000Q609 100 1 4W 3 5 TA52 R433 0RD1202Q609 12K 1 4W 3 5 TA52 R434 0RD1202Q609 12K 1 4W 3 5 TA52 R445 0RD1002Q609 10K 1 4W 3 5 TA52 TECO CDT R446 0RD1002Q609 10K 1 4W 3 5 TA52 LPD CDT R501 0RD0102A609 10 OHM 1 2 W 7 0 5 TA52 R508 0RD4702Q609 47K 1 4W 3 5 TA52 R515 0RD1502Q609 15K 1 4W 3 ...

Page 28: ...R818 0RN2202F409 22K 1 6W 1 TA52 R819 0RD4702Q609 47K 1 4W 3 5 TA52 R821 0RD3001Q609 3K 1 4W 3 5 TA52 R822 0RX0122K607 12 OHM 2 W 5 TA62 R823 0RX0122K665 12 OHM 2 W 5 SF R824 0RX0122K665 12 OHM 2 W 5 SF R831 0RD1002Q609 10K 1 4W 3 5 TA52 DATE 2002 04 15 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R901 0RD4703A609 470K OHM 1 2 W 7 0 5 TA52 R903 0RD5600A609 560 OHM 1 2 W 7 0 5 TA52 R904 0RX1503K60...

Page 29: ...h1 Vth2 O S C ERROR AMP GND O C P F B S D REG STR G8644D Block Diagram 1 2 3 4 5 6 7 8 9 V 3 GND IN V 3 OUT V 2 OUT V 1 OUT V 2 IN V 1 IN VCC VBB LM2469 Monolothic Triple 9nS high Gain CRT Driver Connection Diagram 1 9 M24C08 Serial I2C BUS EEPROM SYMBOL E0 E2 SDA SCL WC Vcc Vss DESCRIPTION Chip Enable Input Serial Data Address Input Output Serial Clock Write Control Supply Voltage Ground 1 PSDIP8...

Page 30: ...l Output 1 Descending Sawtooth Vertical Synchronization Input Horizontal Composite Synchronization Input Video Clamping Pulse V Blanking Output PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL HUNLOCK SCL SDA i c VSMOD VAGC VREF VCAP SGND HPLL1 HBUF HREF HCAP HPLL 2 HSMOD FOCUS DESCRIPTION H Synchronization Unlock Protection V Blanking Output I2C Bus Clock Input I2C Bus Data Input Internally conn...

Page 31: ...PACKING AND ACCESSORIES 31 USER MANUAL POWER CORD ADAPTER SPEAKER SPEAKER KIT MANUAL USER MANUAL POWER CORD Model Name S7500 PE1165T S7500 PE1165 CV7500 PE1165U Model Name MV7500 PE1165U MV7500 PE1165 ...

Page 32: ...DA IIC SCL DDC SDA DDC SCL 32 33 SCHEMATIC DIAGRAM NOTICE Since this is a basic schematic diagram The value of components and some partial connection are sucject to be changed for improvement without notice ...

Page 33: ... 34 35 PRINTED CIRCUIT BOARD 3 MAIN BOARD Component Side 4 MAIN BOARD Solder Side 1 CONTROL BOARD Component Side 2 CONTROL BOARD Solder Side ...

Page 34: ...Apr 2002 P NO 3828TSO048C Printed in Korea ...

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