Dell 2005FPW Service Manual - Page 16
No Raster Osd Is Not Displayed - Gm1501cf
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3. NO RASTER (OSD IS NOT DISPLAYED) - GM1501CF NO RASTER (OSD IS NOT DISPLAYED) 6 78 CHECK U608 PIN3 3.3V? YES CHECK U605 PIN2 2.5V? YES CHECK U607 PIN2 1.8V? YES U402 G4, G3 OSCILLATE AS 14.318MHZ? YES Q105 PIN3 IS 65.22KHz H- SYNC? Q106 PIN3 IS 60Hz V- SYNC? IS PULSE APPEARED AT SIGNAL PINS? AT MODE 11? YES TROUBLE IN CABLE OR LCD MODULE Waveforms 6 U402-G4, G43(14.318V) 7 Q105-#3 NO TROUBLE IN LIPS NO TROUBLE IN LIPS NO TROUBLE IN LIPS 1. CHECK G4, G3 NO SOLDERING CONDITION 2. CHECK X401 3. TROUBLE IN U402 NO CHECK CONNECTION LINE FROM D-SUB TO U402 8 Q106-#3 - 16 -
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3. NO RASTER (OSD IS NOT DISPLAYED) – GM1501CF
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
TROUBLE IN CABLE
OR LCD MODULE
TROUBLE IN LIPS
1. CHECK G4, G3
SOLDERING CONDITION
2. CHECK X401
3. TROUBLE IN U402
CHECK CONNECTION LINE
FROM D-SUB
TO U402
YES
YES
YES
CHECK U608 PIN3
3.3V?
NO
TROUBLE IN LIPS
YES
CHECK U605
PIN2
2.5V?
NO
TROUBLE IN LIPS
YES
CHECK U607
PIN2
1.8V?
U402
G4, G3
OSCILLATE AS
14.318MHZ?
Q105
PIN3 IS 65.22KHz H-
SYNC?
Q106 PIN3 IS 60Hz V-
SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
AT MODE 11?
6
8
7
6
7
Waveforms
U402-G4, G43(14.318V)
Q105-#3
8
Q106-#3