IBM L170 6734 - AB9 Service Manual Download Page 18 | Manualshive

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3. NO RASTER (OSD IS NOT DISPLAYED) – MST9111B

NO RASTER

(OSD IS NOT DISPLAYED)

NO

NO

NO

TROUBLE IN CABLE

OR LCD MODULE

CHECK U801

1. CHECK PIN122, 123

SOLDERING CONDITION

2. CHECK X501
3. TROUBLE IN U201

CHECK CONNECTION LINE
FROM D-SUB TO U501

YES

YES

YES

U201

POWER PIN8, 114

3.3V

U201

PIN122, 123

OSCILLATE AS

12MHZ?

U501

PIN43 IS 48KHz H-SYNC?

PIN44 IS 60Hz V-SYNC?

IS PULSE APPEARED

AT SIGNAL PINS?

AT MODE 12?

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Summary of Contents for L170 6734 - AB9

Page 1: ...COLOR MONITOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL L170 6734 AB9 Chassis No CL 61 ...

Page 2: ... 3 2 Video Input Signal 1 Type R G B Analog 2 Voltage Level 0 0 7 V a Color 0 0 0 Vp p b Color 7 0 0 35 Vp p c Color 15 0 0 7 Vp p 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 31 81kHz Vertical 55 75Hz 3 4 Resolution Max 1280 x 1024 75Hz Recommend 1280 x 1024 60Hz 4 POWER SUPPLY 4 1 Power 90 264V 50 60Hz 0 6A 4 2 Power Consumption 5 ENVIRONMENT 5 1 Operating Temperature 10 C 35 C 5 2 ...

Page 3: ...e module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe i...

Page 4: ...t receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices c...

Page 5: ...tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coati...

Page 6: ... the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on the component side...

Page 7: ...ines 75 0 625 600 1 3 21 10 H Pixels 57 283 49 725 1152 832 32 64 224 832 x 624 V Lines 74 55 667 624 1 3 39 11 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 12 H Pixels 75 56 476 1328 1024 24 136 144 1024 x 768 V Lines 70 069 806 768 3 6 29 13 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 14 H Pixels 80 00 60 241 1328 1024 32...

Page 8: ...e screws Disassemble the four screw cover by using something sharp 1 Pull the Hinge Cover out From the Stand Put a soft cushion on the floor and lay the stand on it 1 Remove the screw for the signal cable 2 Pull out the signal cable Remove the four screws from the Back cover 2 3 4 5 6 7 8 ...

Page 9: ...e two screws for control pcb fix Disassemble inverter shield something thin Pull out the lamp cables 9 Disassemble back cover Detach Al tape from panel Remove the 4 screws from each side of metal frame 1 Lift downside of metal frame 2 Detach the insulation tage 3 Pull out the link cable 10 11 12 13 14 15 16 ...

Page 10: ... 10 WIRING DIAGRAM Connector Ass y P N 6631T11012W Connector Ass y P N 6631T20022G Connector Ass y P N 6631T20023J ...

Page 11: ... L L L o o o o w w w w V V V V o o o o l l l l t t t t a a a a g g g g e e e e D D D D i i i i f f f f f f f f e e e e r r r r e e e e n n n n t t t t i i i i a a a a l l l l S S S S i i i i g g g g n n n n a a a a l l l l i i i i n n n n g g g g LIPS 5V 5V AC I nput 3 3V Reg Diode KDS184 5V 3 3V 12V R G B H V Sync 3 3V 2 5V 3 3V 2 5V ...

Page 12: ...rpolates input to 1280 X 1024 resolution signal and outputs 8 bit R G B signal to transmitter 2 Power Part This part consists of the one 3 3V regulator and two 2 5V drop diodes to convert power which is provided 12V 5V in Power board 5V is provided for LCD panel and Micom Also 5V is converted 3 3V by regulator and 3 3V is converted 2 5V by drop diode Converted power is provided for IC in the main ...

Page 13: ...gh a bridge rectifier and a bulk 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 modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achive the dc output st...

Page 14: ... is available to LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button ...

Page 15: ... 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 d ADC GAIN The highest value of input levels s...

Page 16: ...UTINE CHECK U201 NO NO NO CHECK POWER BOARD AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK 5VS LINE OPEN CHECK CHECK 3 3V LINE NO CHECK X TAL YES YES YES YES YES CHECK J705 VOLTAGE PIN5 PIN6 5V CHECK U501 PIN 8 Voltage 5V IS U201 PIN114 3 3V VOLTAGE CHECK U201 PIN 122 PULSE NO PROBLEM ...

Page 17: ...IN THE LCD MODULE CHECK LIPS CHECK MICOM INV ON OFF PORT 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT LIPS YES YES YES YES J705 PIN5 PIN6 5V J705 PIN9 5V J705 PIN10 5V CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE ...

Page 18: ...LE OR LCD MODULE CHECK U801 1 CHECK PIN122 123 SOLDERING CONDITION 2 CHECK X501 3 TROUBLE IN U201 CHECK CONNECTION LINE FROM D SUB TO U501 YES YES YES U201 POWER PIN8 114 3 3V U201 PIN122 123 OSCILLATE AS 12MHZ U501 PIN43 IS 48KHz H SYNC PIN44 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS AT MODE 12 ...

Page 19: ... 19 4 TROUBLE IN DPM TROUBLE IN DPM NO NO TROUBLE IN U501 CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK H V SYNC LINE YES YES CHECK R773 R775 SYNC CHECK U501 PIN 43 44 SYNC PULSE ...

Page 20: ... 20 EXPLODED VIEW 1 3 4 5 6 9 7 10 12 12 11 8 2 ...

Page 21: ...TH BK LGEWA 3550TKK521A 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 3313TL2018C MAIN TOTAL ASSEMBLY LL170M IBM CL 61 AUO 4951TKS149B METAL ASSEMBLY FRAME M...

Page 22: ...0V 10 R TP X7R C734 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C735 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C760 0CE107EF610 100UF KMG RD 16V 20 FL BULK C801 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y DATE 2004 06 04 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C803 0CE107EF610 100UF KMG RD 16V 20 FL BULK C804 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C805 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C806 0CK103C...

Page 23: ...R701 0RJ0752D677 75 OHM 1 10 W 5 1608 R TP R703 0RJ0752D677 75 OHM 1 10 W 5 1608 R TP R706 0RJ0752D677 75 OHM 1 10 W 5 1608 R TP R708 0RJ4700D677 470 OHM 1 10 W 5 1608 R TP R709 0RJ4700D677 470 OHM 1 10 W 5 1608 R TP R716 0RJ4701D677 4 7K OHM 1 10 W 5 1608 R TP R717 0RJ4701D677 4 7K OHM 1 10 W 5 1608 R TP R720 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R722 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R723 0R...

Page 24: ...SCHEMATIC DIAGRAM 24 1 SCALER MICOM IC 1 1 ...

Page 25: ... 25 2 MICOM 2 ...

Page 26: ... 26 3 POWER 3 ...

Page 27: ... 27 4 CONNECTOR JACKS 4 ...

Page 28: ...Jun 2004 Printed in Korea P NO 3828TSO058M ...

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