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IBM T T 541, Service Manual

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IBM T T 541 Service Manual Download Page 13

CHECK U802

NO

- 13 -

1.  CHECK PIN 93, 94

SOLDERING CONDITION

2. CHECK X201
3. TROUBLE IN U201

U804, U803, U806

POWER PINS

3.3V, 2.5V?

NO

CHECK U801 PIN 5, 2 
U804, U803, U806

X201

OSCILLATE AS 

14,3181M?

NO

CHECK U201 OR U401
SOLDERING CONDITION AND
CHECK CONNECTION LINE
FROM U201 TO U201 or U401

NO

TROUBLE IN CABLE 

OR LCD MODULE

J706’S PIN1

3.3V?

YES

YES

YES

YES

3. WHITE SCREEN (OSD IS NOT DISPLAYED) 

WHITE SCREEN

(OSD IS NOT DISPLAYED)

U201

PIN 31 IS 65MHz CLOCK?

PIN 35 IS 48KHz H-SYNC?

PIN 36 IS 60Hz V-SYNC?

IS PULSE APPEARED 

AT SIGNAL 

PINS?

Input 

1024x768@60Hz Signal.

Summary of Contents for T T 541

Page 1: ...COLOR MONITOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL T541 9512 HW0 T541 9512 HB0 Chassis No CL 37...

Page 2: ...Power Adaptor Input AC 90 264V 50 60Hz 0 6A Output DC 12V 3A 4 2 Power Consumption 5 ENVIRONMENT 5 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 5 2 Relative Humidity 10 80 Non condensing 5 3 Al...

Page 3: ...such as pencil or pen as this may result in damage to the panel Protect the module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded thr...

Page 4: ...z Resolution 640 x 350 720 x 400 TEXT 640 x 480 640 x 480 640 x 480 800 x 600 800 x 600 800 x 600 800 x 600 832 x 624 MAC 1024 x 768 1024 x 768 1024 x 768 Total Period E 800 449 900 449 800 525 864 52...

Page 5: ...up Brightness adjustment Bring up auto image setup Switch between input signals CONTROLS LOCK UNLOCK This feature allows you to secure the current control settings while allowing the user to adjust Br...

Page 6: ...WIRING DIAGRAM 6 J4 J1 J702 J702 CN3 CN2 CN1 J3 J2 Connector Ass y P No 6631T12002J Connector Ass y P No 6631T11012X Connector Ass y P No 6631T20008X Connector Ass y P No 6631T20008X...

Page 7: ...D Module Inverter CTL Module CTL Inverter Digital Signal 5V 12V Power CTL 3 3V Data 2 5V Reg 3 3V Reg 5V 5V H V H V TTL Gate IC H V Switching SOG CTL ADC IC MXL88295EC R G B TMDS Receiver IC SIL141B R...

Page 8: ...768 resolution signal and outputs 8 bit R G B signal to transmitter 3 Display Data Transmitter Part This part transmit digital signal from the Scaler to the receiver of module 4 Power Part This part c...

Page 9: ...ulk capacitor 3 Energy Transfer This part function is transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width mod...

Page 10: ...tware 1 Adjustment for Factory Preset Mode 1 Run alignment program for LI507N on the IBM compatible PC 2 Select EEPROM all clear command and Enter 3 Display cross hatch pattern at Mode 1 4 Select COMM...

Page 11: ...ROM OSCILLATE AS 24MHZ NO CHECK THE OUTPUT OF POWER BOARD CHECK J702 PIN 4 VOLTAGE 5V NO NO POWER POWER INDICATOR OFF CHECK THE OUTPUT OF POWER BOARD CHECK J702 PIN 1 VOLTAGE 12V NO CHECK U502 PIN 25...

Page 12: ...YED CHECK POWER BOARD J704 PIN 1 12V NO 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT J704 PIN 7 5V NO REPLACE INVERTER ASS Y CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL...

Page 13: ...AS 14 3181M NO CHECK U201 OR U401 SOLDERING CONDITION AND CHECK CONNECTION LINE FROM U201 TO U201 or U401 NO TROUBLE IN CABLE OR LCD MODULE J706 S PIN1 3 3V YES YES YES YES 3 WHITE SCREEN OSD IS NOT D...

Page 14: ...14 CHECK U401 WAVEFORM NO NO CHECK U201 CHECK U101 CHECK J706 S SOLDERING CONDITION YES REPLACE MAIN BOARD U201 YES 4 RAINBOW SCREEN RAINBOW SCREEN OSD IS NOT DISPLAYED...

Page 15: ...C203 1 C220 10 R205 R207 C208 20 20 L204 L205 R208 R210 C214 30 1 L203 C225 C224 C223 C828 U804 R560 R561 C518 C519 R564 ZD501 Q507 U805 D709 R738 C814 C813 C732 C736 L101 R739 R740 C129 C734 C735 R10...

Page 16: ...16 4 POWER BOARD Component Side 5 POWER BOARD Solder Side...

Page 17: ...17 2 1 5 6 3 4 11 12 13 7 8 9 10 14 16 17 18 15 EXPLODED VIEW...

Page 18: ...N BLACK STEALTH BLACK TILT SWIVEL ASSEMBLY LI507N P WHITE PEARL WHITE METAL ASSEMBLY FRAME MAIN LI507N METAL ASSEMBLY REAR LI507N COVER T541H PIECE DVI STEALTH BLACK COVER LI507N PIECE COVER DVI P W P...

Page 19: ...ART NO DESCRIPTION SPECIFICATION C213 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C214 0CC150CK41A 15PF 1608 50V 5 R TP NP0 C215 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C216 0CK104CK56A 0 1UF 1608 50V 10 R...

Page 20: ...63LVDM83R THINE 56P TSSOP R U501 0ICS240213A CAT24WC02J TE13 8P SOP TP 2K I U502 0IZZTSZ189A MYSON 42P BK OTP LI507N DATE 2002 5 27 S AL LOC NO PART NO DESCRIPTION SPECIFICATION U503 0ICS240813B CAT24...

Page 21: ...608 R TP R542 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R543 0RJ4701D477 4 7K OHM 1 10 W 1 1608 R TP DATE 2002 5 27 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R544 0RJ1004D677 1000000 OHM 1 10 W 5 160...

Page 22: ...G I DO204AL 1000V 1 D903 0DRGS00341A MBRF20H100CT GENERAL SEMICONDU D904 0DR400409AB UF4004 TP G I DO204AL 400V 1A D906 0DR206000AA MBRF2060CT BK G I ITO220 60V 2 D908 0DZ620009AP P6KE200A GENERAL SE...

Page 23: ...INA8 PIXINA9 PIXINA10 PIXINA11 GND PIXINA12 PIXINA13 PIXINA14 PIXINA15 VDDP PIXINA16 PIXINA17 PIXINA18 PIXINA19 PIXINA20 PIXINA21 PIXINA22 PIXINA23 VDD BB7 BB6 BB5 BB4 BB3 BB2 BB1 BB0 GNDP GB7 GB6 GB5...

Page 24: ...nput Data for 1 pixel clock mode 18 bit Odd Data for 2 pixel clock mode 8 bit Channel 2 Data 1 pixel clock 6 bit Odd Channel 0 Data 2 pixel clock 6 bit EVEN Channel 0 Data 2 pixel clock 6 bit Odd Chan...

Page 25: ...ROL STATE COUNTERS SLAVE SCL A0 A1 VCC VSS A2 ADDRESS COMPARATORS CONTROL LOGIC ACK E PROM 2 PIN CONFIGURATION DIP Package p SOIX Package J TSSOP Package U BLOCK DIAGRAM PIN FUNCTION Pin Name A0 A1 A2...

Page 26: ...F08 1 2 3 4 5 6 7 D0a D0b Q0 D1a D1b Q1 GND 14 13 12 11 10 9 8 Vcc D3b D3a Q3 D2b D2a Q2 1 2 4 5 9 10 12 13 3 Q0 Q1 Q2 Q3 D0a D0b D1a D1b D2a D2b D3a D4b 6 8 11 1A 1 2 3 6 8 11 4 5 9 10 12 13 1Y 2Y 3Y...

Page 27: ...SCHEMATIC DIAGRAM 27 1 H V SYNC DETECT...

Page 28: ...28 2 AD9884 PRE AMP PLL ADC SIL141B...

Page 29: ...29 3 VIDEO PROCESSOR...

Page 30: ...30 4 OUTPUT LVDS CONNECTOR...

Page 31: ...31 5 MICOM...

Page 32: ...32 6 KEY PART...

Page 33: ...33 7 D SUB DVI D...

Page 34: ...34 8 POWER...

Page 35: ...Jun 2002 Printed in Korea P NO 3828TSO018J...

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