Philips 32PFL7422/79 - Page 22

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TPT1.1A LA
5. Service Modes, Error Codes and Fault Finding
3.No picture/LED is green
Check
scaler board U102
pin1=14V,pin4=1.22V,
pin7=16V,pin8
=5V
No
Check power
Yes
Check if
working voltage
U152,pin2=3.3V
pin3=5V
No
Check circuit around
each regulator and
eliminate short and
open situation
Yes
Check if clock
source X350
Replace X350
No
Yes
Check if
RGB,clk,H/V and
DE signal output 128
bits TTL
No
Try to replace
flash Rom
EEPROM
Check
resistors-network
No
Replace bad resistors-
network
Yes
Yes
Replace LVDS cable