Repair Flow Chart - Philips 32TA1000/93 Service Manual

74 TPF1.4A LA

9.4 Repair Flow Chart

1.No work/LED is off
Check if
power switch is
normal
Yes
Check
power board 1089
pin1,2=16V,pin3=24V,
pin4=1.8V,pin5=
4.6V
Yes
Check scaler board1503
pin1=1.18V,pin2~5=3.3V
2.No raster/picture too
dim
Check
power board 1088,
pin1~5=24V,pin6=
1.8V pin7=4.6V
Yes
Check
power board 1089
pin1,2=16V,pin3=24V,
pin4=1.8V,pin5=
4.6V
Yes
Check scaler board
9. Trouble Shooting
No
Replace Power switch
No
Check power board
No
Check power board
No
Check power board
3.No picture/LED is green
Check
power board 1088,
No
pin1~5=24V,pin6=
1.8V pin7=4.6V
Yes
Check if
working voltage
No
7501 pin3=3.3V,3524=
3.3V,3530=3.3V
Yes
Check if clock
No
source 1301,1502,
1731
Yes
Check if
scaler 7403 RGB,
No
clk,H/V and DE signal
output 128 bits
TTL
Yes
Check
No
resistors-network
Yes
Replace LVDS cable
Yes
Replace LCD panel
Check power board
Check circuit around
each regulator and
eliminate short and
open situation
Replace 1301,1502,1731
Try to replace
CPU or CPU's flash Rom
CPU's EEPROM
Painter
Painter's EEPROM
Replace bad resistors-
network