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IBM L170 Service Manual

Color monitor chassis no. : cl-61
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MODEL: L170 (6734 - AB9)
COLOR MONITOR
SERVICE MANUAL
Chassis No. : CL-61
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.

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  Summary of Contents for IBM L170

  • Page 1 MODEL: L170 (6734 - AB9) COLOR MONITOR SERVICE MANUAL Chassis No. : CL-61 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM ....12 PRECAUTIONS ............3 ADJUSTMENT ............14 SERVICE PRECAUTIONS ........4 TROUBLESHOOTING GUIDE ......16 TIMING CHART ............6 EXPLODED VIEW...........20 DISASSEMBLY ............8 REPLACEMENT PARTS LIST .......22 WIRING DIAGRAM ..........10 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: Service Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 5 General Soldering Guidelines Replacement 1. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad and solder it.
  • Page 6: Timing Chart

    Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...
  • Page 7 Sync Total Video Active Front Sync Back Mode Frequency Resolution Sort Porarity Clock Period (E) Time (A) Porch (D) Duration(C) Porch (B) H(Pixels) 31.469 640 x 350 25.175 V(Lines) 70.8 H(Pixels) 31.469 640 x 480 25.175 V(Lines) 59.94 H(Pixels) 35.00 KHz 640 x 480 30.240 V(Lines)
  • Page 8: Disassembly

    DISASSEMBLY Disassembly Hinge Cover. Pull the Hinge Cover out From the Stand. Pull the rear cover assy out from stand. Put a soft cushion on the floor and lay the stand on it. Remove the screws. 1. Remove the screw for the signal cable. 2.
  • Page 9 # 10 1. Pull the front cover upward. Disassemble back cover 2. Then, let the all latches are separated. 3. Put the from face down. # 11 # 12 Remove te two screws for control pcb fix. Detach Al-tape from panel. # 13 # 14 Disassemble inverter shield something thin.
  • Page 10: Wiring Diagram

    WIRING DIAGRAM Connector Ass’y P/N: 6631T11012W Connector Ass’y P/N: 6631T20023J Connector Ass’y P/N: 6631T20022G - 10 -...
  • Page 11: Block Diagram

    BLOCK DIAGRAM - 11 -...
  • Page 12: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. 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. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 135MHz.
  • Page 13: Lips Board Block Diagram

    LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC INPUT RECTIFIER ENERGY OUTPUT RECTIFIER COMPONENTS AND FILTER TRANSFER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLECTI CONTROL COUPLER CIRCUIT ISOLATION PRIMARY SECONDARY Operation description_LIPS 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 14: Adjustment

    ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.
  • Page 15: Service Osd

    SERVICE OSD 1) Turn off the power switch at the front side of the display. 2) Wait for about 3 seconds and press Exit POWER switch with 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) MODULE SELECT b) NVRAM INIT : EEPROM initialize(24C08) c) ADC OFFSET : The lowest value of input leves sets to digitally 0(zero).
  • Page 16: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND OUT A SHORT POINT CHECK J705 VOLTAGE AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK CHECK 5VS LINE U501 PIN 8 Voltage (OPEN CHECK) (5V) ? NO PROBLEM CHECK KEY CONTROL...
  • Page 17 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) J705 PIN5, PIN6 CHECK LIPS CHECK MICOM INV ON/OFF J705 PIN9 PORT. 1. CONFIRM BRIGHTNESS J705 PIN10 OSD CONTRL STATE. 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS CONTACTING SCOPE...
  • Page 18 3. NO RASTER (OSD IS NOT DISPLAYED) – MST9111B NO RASTER (OSD IS NOT DISPLAYED) U201 POWER PIN8, 114 CHECK U801 3.3V U201 1. CHECK PIN122, 123 PIN122, 123 SOLDERING CONDITION OSCILLATE AS 2. CHECK X501 12MHZ? 3. TROUBLE IN U201 U501 PIN43 IS 48KHz H-SYNC? CHECK CONNECTION LINE...
  • Page 19 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK PC IS NOT GOING R773, R775 (SYNC) ? INTO DPM OFF MODE CHECK U501 PIN 43.44 CHECK H/V SYNC LINE SYNC PULSE ? TROUBLE IN U501 - 19 -...
  • Page 20 - 20 -...
  • Page 21: Exploded View Parts List

    COVER, LL170M HINGE IBM17" 3551TKK524A COVER ASSEMBLY, LL170M STAND . REAR COVER 6871TPT272A PWB(PCB) ASSEMBLY,POWER, LL170M(IBM) POWER TOTAL POWERNET LIPS FOR LPL 6871TPT272B PWB(PCB) ASSEMBLY,POWER, LL170M(IBM) POWER TOTAL POWERNET LIPS FOR AUO 3313TL2018B MAIN TOTAL ASSEMBLY, LL170M IBM CL-61 - LPL...
  • Page 22: 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: 2004. 06. 04. DATE: 2004. 06. 04. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 23 DATE: 2004. 06. 04. DATE: 2004. 06. 04. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R209 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP R744 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R210 0RJ0682D677 68 OHM 1/10 W 5% 1608 R/TP...
  • Page 24: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER & MICOM IC - 24 -...
  • Page 25 2. MICOM - 25 -...
  • Page 26 3.POWER - 26 -...
  • Page 27 4. CONNECTOR & JACKS - 27 -...
  • Page 28 Jun. 2004 Printed in Korea P/NO : 3828TSO058M...

This manual is also suitable for:

6734 - ab9L170 6734 - ab9