Philips TCM2.0E Service Manual page 15

Service Modes, Error Codes, and Fault Finding
No Picture, no sound, no Black light, Fuse Broken
YES
Pin 8~11 of P804 is
12V, OK?
NO
Pin2~3 of P804 is
5v&Pin 1 is 5v,OK?
YES NO
Check Main Check sub PSU
PSU for standby
Figure 5-11 No Picture, no sound, no backlight, fuse broken (26" sets)
No Picture, Black light & Sound OK
pin4~5 is 5V & YES
pin7~8 is12V of
U505 OK?
NO
Check Pin 4 Of
UM01 is 3.3v
Check the
No
output voltage
of Q203. is it
OK?
Yes
Check
Yes
waveform of
L200~L209 is
OK?
No
Is No
Pin220,229,238
of U203 shorted
to earth?
Figure 5-12 No Picture, Backlight & Sound OK
TCM2.0E LA
Is YES
U800~U808&U2
01 OK?
NO
Replace the
bad one of
u800~u808&U2
01
Yes
Check the
voltage of
C of Q204.
check the
cable to panel
check Pin
221~228&Pin
230~242 of U203
5. EN 15
Check
LQFP jointing of
U203
YES
Check
X200,C221,C222,C
23,L214 & IIC Bus
YES
Check jointing of
U204,R271~R288
,R248~R260.
I_17950_010.eps
080508
Replace Q203
I_17950_011.eps
080508