Abnormal Display - Philips for Intel Socket 775 processor Service Manual

EN 24 5. S/SD/HD 3.1 PDP
1
Logic-Main
Observation of

abnormal Display

Regular abnormal
pattern
Yes
Replace the Logic-
main board
Diagnostic software
Abnormal Display
Abnormal Display
Exept horizontal or Vertical Lines
Check FFC
Flat Foil Connections
between Logic-main, X-main and Y-
main
2
Y-Main Check
Check Fuses and FET
No
Logic main
waveform on Y-board
normal state
Replace PDP
Not
correct
Check voltages.
Adjust Y waveform
Go to X-Main board
Not
correct
Check supply voltages or
replace X-Main board.
Check Ramp
(buffer)
Waveform?
No
waveform
Waveform is
OK
Check voltages.
Replace Y-Main
board
Check
Waveform is
OK
X main board seems to be OK.
Replace PDP
Figure 5-11
3
X-Main Check
Check Fuses and FET
Check X
Waveform
Waveform?
Waveform not
OK
Replace X-Main
board