Philips ME5P, Service Manual, Page: 115 / 151

115
ME5P 15" & 20"
Go to cover page
Repair Flow Chart
1
.No Work/L
E
D is off
Check if
power switch
is normal
No
Replace power switch
Yes
Check if AC
adaptor output
=
1
6V
No
Replace power adaptor
Check
1001
to the inverter board
Yes
P
in
1
.
2
.3=
1
6V
P
in4=
1
.86V
P in 5 = 1 .78V
2 .No raster/picture
too dim
Check CN
1
on
inverter board
pin
1
,
2
,3=
1
6V
Check working
voltage, backlight
control signal and
brightness control
signal on scaler board
No
Yes
Check if
1
3
02
on
scaler board
pin3=3.3V
No
Check IR board
Check if working voltage
pin3=3.3V of 73
0
3
33 0 7=3.3V 33 1 3= 5 V
1
3
0
4
P
in
1
=
5
V
Check circuit around
each regulator and
eliminate short and
open situation
3.No picture/L E D
is green
No
Check if clock source
1
4
01
,
1
3
01
,
1
6
21
Replace
1
4
01
,
1
3
01
,
1
6
21
No
Yes
No
Check if scaler 74 01
RGB,clk,H/V and
D
E signal output
48 bits TTL
Try to replace
C
P U or C P U'Sflash Rom
C
P
U'S
EEP
RO
M
P ainter
P
ainter's
EEP
RO
M
Yes
No
Check resistors-
network
Replace bad resistors-
network
Yes
Replace LVDS cable
Replace LCD panel
No
4.No D-Sub picture
Check if H/V
signals input to
schmitt trigger
7
201
NO
Check input path
Yes
Check if schmitt
trigger 7
201
output H/V signals
to JAGAS
M
No
Replace 7 201
Yes
Go to 3.No picture/L E D is green
Yes