Philips S42AX-YD04 Service Manual page 41

5.2.4 Abnormal display
"Abnormal Display" is related to Y-Main, X-Main, Logic Main
and so on. This page shows you how to check the boards, and
the following pages show you how to find the defective board.
Logic Main
[42": LED 2000 Blinks]
[50": LED 2002 Blinks]
Check
F5004 for Vdd (5V)
F5003 for Vcc (15V)
F5001 for Vs (205V)
F5005 for Vset
F5006 for Vccf
Check
Q5000 ~ Q5010
F4004 for Vdd (5V)
F4001 for Vcc (15V)
F4002 for Vs (205V)
F4005 for Ve (110V)
Check
Q4001 ~ Q4007
Service Modes, Error Codes, and Fault Finding
Check necessary points
Figure 5-28 Fault symptom: "Abnormal Display", general guide line
LED 2000 blinks
(Motion of Vsync)
Figure 5-29 Fault symptom: "Abnormal Display" 42" HD W2
Abnormal
Display
Y – Main
Y-main
OPEN
Fuse Replace Y-B'd
SHORT
SHORT
Replace Y-B'd
FET,IGBT
OPEN
X-main
OPEN
Fuse Replace X-B'd
SHORT
SHORT
FET,IGBT
Replace X-B'd
OPEN
SHORT
Y-BUFFER
Replace Y-BUFFER
OPEN
[Logic Main]
Regular
Logic main
Abnormal
Normal State
Replace
board
SDI PDP 2K7 5.
X – Main
Check necessary points
H_16870_018.eps
050407
H_16870_019.eps
030407
EN 41