Philips 32PFL5604/78 Service Manual page 16

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