Dell 2005FPW Service Manual - Page 15

No Raster Osd Is Not Displayed - Lips - lcd

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2. NO RASTER (OSD IS NOT DISPLAYED) - LIPS NO RASTER (OSD IS NOT DISPLAYED) J101 NO PIN6, PIN7, PIN9 5V? YES 4 J101 PIN10 NO 3.3V? YES 5 J101 PIN12 NO 3.3V? YES CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL. NO (CONTACT PROBE TO CAUTION LABEL. CAN YOU SEE PULSE AT YOUR SCOPE? YES REPLACE CCFL LAMP IN THE LCD MODULE Waveforms 4 J101-#10(3.3V) 5 J101-#12(3.3V) CHECK LIPS CHECK MICOM INV ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. 2. CHECK MICOM DIM-ADJ PORT LIPS - 15 -

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2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
NO
REPLACE CCFL LAMP
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
J101
PIN6, PIN7, PIN9
5V?
J101 PIN10
3.3V?
J101 PIN12
3.3V?
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
4
5
4
5
Waveforms
J101-#10(3.3V)
J101-#12(3.3V)