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IBM T541 Service Manual

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MODEL: T541 (9512-HW0)
COLOR MONITOR
SERVICE MANUAL
Chassis No. : CL-37
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
T541 (9512-HB0)

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  Summary of Contents for IBM T541

  • Page 1 MODEL: T541 (9512-HW0) T541 (9512-HB0) COLOR MONITOR SERVICE MANUAL Chassis No. : CL-37 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............10 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......11 TIMING CHART ............4 PRINTED CIRCUIT BOARD........15 OPERATING INSTRUCTIONS .........5 EXPLODED VIEW...........17 WIRING DIAGRAM ..........6 REPLACEMENT PARTS LIST .......19 BLOCK DIAGRAM ........... 7 PIN CONFIGURATION..........23 DESCRIPTION OF BLOCK DIAGRAM....
  • Page 3: Precautions

    PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) or marked on the schematic diagram and the inverter circuit, must disconnect the AC adapter...
  • Page 4: Timing Chart

    TIMING CHART VIDEO SYNC Total Video Blanking Sync Back Front Sync Frequency MODE H / V Resolution Period Active Time Duration Porch Porch Polarity Clock ( E ) Time ( A ) ( B ) ( D ) ( F ) ( C ) 25.175 31.468 KHz...
  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW Front Control Panel Front Control Panel Bring up Brightness adjustment. Switches the monitors on and off. Bring up auto image setup. Display main OSD menu and selects highlighted menu item. CONTROLS LOCK / UNLOCK This feature allows you to secure the current control settings, while allowing the user to adjust Moved the cursor to highlight icons or...
  • Page 6: Wiring Diagram

    WIRING DIAGRAM Connector Ass’y P/No. : 6631T20008X Connector Ass’y P/No. : 6631T11012X Connector Ass’y P/No. : 6631T20008X J702 J702 Connector Ass’y P/No. : 6631T12002J - 6 -...
  • Page 7: Block Diagram

    - 7 -...
  • Page 8: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Input signal switching part. There are two inputs which are analog and digital input. They come from each 15 pin D-Sub and 24 pin DVI-D connector. 2. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock.
  • Page 9 BLOCK DIAGRAM POWER BOADR 50 ~ 60Hz 100KHz HVDC INPUT RECTIFIER ENERGY OUTPUT RECTIFIER COMPONENTS AND FILTER TRANSFER AND FILTER LINE 100 ~ 240V PWM CONTROL PHOTO-COUPLER SIGNAL CIRCUIT ISOLATION COLLENTION SECONDARY PRIMARY DESCRIPTION OF BLOCK DIAGRAM 1. EMI components. This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse.
  • Page 10: Adjustment

    EEPROM. 1. Adjustment for Factory Preset Mode 8) Select PRESET EXIT command and Enter. 1) Run alignment program for LI507N on the IBM compatible PC. 3. DDC Data Write Procedure 2) Select EEPROM all clear command and Enter.
  • Page 11: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK CHECK THE OUTPUT J702 PIN 1 VOLTAGE OF POWER BOARD (12V) ? CHECK CHECK THE OUTPUT J702 PIN 4 VOLTAGE OF POWER BOARD (5V) ? CHECK X501’S WAVEFROM CHECK X501. OSCILLATE AS 24MHZ ? CHECK...
  • Page 12 2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER NO RASTER (OSD IS NOT DISPLAYED) J704 PIN 1 CHECK POWER BOARD 12V? CHECK MICOM INV J704 PIN 8 ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. J704 PIN 7 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS...
  • Page 13 3. WHITE SCREEN (OSD IS NOT DISPLAYED) WHITE SCREEN (OSD IS NOT DISPLAYED) CHECK U801 PIN 5, 2 U804, U803, U806 U804, U803, U806 POWER PINS 3.3V, 2.5V? 1. CHECK PIN 93, 94 X201 SOLDERING CONDITION OSCILLATE AS 2. CHECK X201 14,3181M? 3.
  • Page 14 4. RAINBOW SCREEN RAINBOW SCREEN (OSD IS NOT DISPLAYED) CHECK CHECK U401 CHECK U101 U201 WAVEFORM? REPLACE MAIN BOARD & U201 CHECK J706’S SOLDERING CONDITION - 14 -...
  • Page 15: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) J706 2. MAIN BOARD (Solder Side) C229 C235 C231 C234 C228 C230 C233 C253 C244 C243 C252 C251 C242 C250 C249 C248 C227 C241 C239 C226 C211 C207 C221 C201 3.CONTROL BOARD (Component Side) P/N :6870T506C10 DATE :2002.05.13 R1 R5...
  • Page 16 4. POWER BOARD (Component Side) 5. POWER BOARD (Solder Side) - 16 -...
  • Page 17: Exploded View

    - 17 -...
  • Page 18 EXPLODED VIEW PARTS LIST DESCRIPTION Ref. No. Part No. CABINET ASSEMBLY, LI507N IBM 3090TKL047A BLACK (STEALTH BLACK) 3091TKL046A CABINET ASSEMBLY, LI507N IBM 3090TKL047A P/WHITE (PEARL WHITE) 3091TKL046B LCD(LIQUID CRYSTAL DISPLAY), LM150X07-B4 LG PHILPS TFT COLOR 15.0 INCH XGA 6304FLP024A BACK COVER ASSEMBLY, LI507N 3808TKL034A BLACK (STEALTH BLACK)
  • Page 19: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2002. 5. 27. DATE: 2002. 5. 27. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 20 DATE: 2002. 5. 27. DATE: 2002. 5. 27. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C733 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 U503 0ICS240813B CAT24WC08J-TE13 8P,SOIC R/TP 8 C801 0CC102CK41A 1000PF 1608 50V 5% R/TP NP0...
  • Page 21 DATE: 2002. 5. 27. DATE: 2002. 5. 27. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R110 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP R544 0RJ1004D677 1000000 OHM 1/10 W 5% 1608 R/T R115 0RJ5600D677 560 OHM 1/10 W 5% 1608 R/TP...
  • Page 22 DATE: 2002. 5. 27. DATE: 2002. 5. 27. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RA105 0RHZTCZ001A 100 OHM 1/16 W 5% 3215 R/TP CH R902 0RD1004Q609 1M OHM 1/4 W (3.4) 5% TA52 RA106 0RHZTCZ001A 100 OHM 1/16 W 5% 3215 R/TP CH...
  • Page 23: Pin Configuration

    PIN CONFIGURATION MX88L250EC-X, MX88L250EC-S 128p Pin PIXINA0 PIXINA1 PIXINA2 PIXINA3 PIXINA4 PIXINA5 PIXINA6 PIXINA7 PIXINA8 VDDP PIXINA9 MX88L250EC-X (XGA FBL) PIXINA10 PIXINA11 MX88L250EC-S (SXGA FBL) PIXINA12 PQFP128 GNDP PIXINA13 (preliminary) PIXINA14 PIXINA15 VDDP PIXINA16 PIXINA17 PIXINA18 PIXINA19 PIXINA20 PIXINA21 PIXINA22 - 23 -...
  • Page 24 SiI141B Pin Diagram 24-bit Input Data for 1-pixel/clock mode 8-bit Channel 1 Data 8-bit Channel 0 Data 8-bit Channel 2 Data 1-pixel/clock 1-pixel/clock 1-pixel/clock 6-bit Even Channel 1 6-bit Odd Channel 0 6-bit Even Channel 2 Data 2-pixel/clock Data 2-pixel/clock Data 2-pixel/clock OGND OVcc...
  • Page 25 CAT24WC08J-TE13 8P BLOCK DIAGRAM DIP Package(p) SOIX Package(J) EXTERNAL LOAD V CC V CC SENSE AMPS D OUT SHIFT REGISTERS V SS V SS V CC COLUMN V SS WORD ADDRESS DECODERS BUFFERS TSSOP Package(U) START/STOP LOGIC V CC E PROM XDEC V SS CONTROL...
  • Page 26 SN54F86, SN74F86 TOP VIEW 74F08 TOP VIEW Vcc = Pin 14 GND = Pin 7 - 26 -...
  • Page 27: Schematic Diagram

    SCHEMATIC DIAGRAM 1. H/V SYNC DETECT - 27 -...
  • Page 28 2. AD9884 (PRE-AMP/PLL/ADC)/ SIL141B - 28 -...
  • Page 29 3. VIDEO PROCESSOR - 29 -...
  • Page 30 4. OUTPUT(LVDS/CONNECTOR) - 30 -...
  • Page 31 5. MICOM - 31 -...
  • Page 32 6. KEY PART - 32 -...
  • Page 33 7. D-SUB/DVI-D - 33 -...
  • Page 34 8. POWER - 34 -...
  • Page 35 Jun. 2002 Printed in Korea P/NO : 3828TSO018J...

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