Philips 32HF7445/93 Service Manual page 19

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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
Yes
Check if
working voltage
U152,pin2=3.3V
pin3=5V
Yes
Check if clock
source X350
Yes
Check if
RGB,clk,H/V and
DE signal output 128
bits TTL
Yes
Check
resistors-network
Yes
Replace LVDS cable
No
Check circuit around
No
each regulator and
eliminate short and
No
Try to replace
No
flash Rom
EEPROM
No
Replace bad resistors-
Figure 5-7 No Picture flowchart
TPT1.1HA LA
Check power
open situation
Replace X350
network
H_17010_022.eps
180907
5. EN 19