Philips 32PFL5604/78 - Fault Finding and Repair Tips

Service Modes, Error Codes, and Fault Finding
EN 16 TCM3.2L LA5.
2009-Jun-19
5.6 Fault Finding and Repair Tips
5.6.1 Fault Finding Flow Charts
Figure 5-2 No picture, no sound, no backlight. Fuse broken.
Figure 5-3 No picture. Backlight and sound okay.
18520_204_090313.eps
090313
No Picture, no sound, no Back light, Fuse Broken
For P22,pin10 is
3.3V , OK?
For P22,pin1 is
24V , OK?
Check IPB
For P22 ,Pin 7~8
is 3.3V, OK?
Check Q10,
X5,IR_MCU,KEY,
MCU_RESET,U8.
Check main
board DV10
&+3.3V OK?
NO
NO NO
YES YES YES
Check main board
DDRV & AV12, OK?
YES
Check main board
short_protect ,
oreset#,pwr_detect
YES
Check IPB
18520_205_090313.eps
090313
No Picture, Back light & Sound OK
Check the 5V-IF
voltage of . is it
OK?
Check 33V is
OK?
Check the
voltage
of R48,U6
Yes
No
Yes
Is
Q14,C184,C197
,L54 shorted to
earth?
Replace R48 &
U6
Yes
No
check the
U2,Q13
check
D2,R184,R178
No