Philips 26TA2800/93 Service Manual page 14

14
TPS1.1A LA
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5. Service Modes, Error Codes and Fault Finding
3.No picture/LED is green
Check
scaler board U7105
pin1=24V,pin4=5V
Yes
Check if
working voltage
U7104 pin1=5V,
pin4=3.3V
Yes
Check if clock
source X4101
Yes
Check if
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RGB,clk,H/V and
DE signal output 128
bits TTL
Yes
Check
resistors-network
Yes
Replace LVDS cable
4.No TV sound
Check if
tuner TU2101 pin11
output IF signal
Yes
Check U4101
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No
Check power
Check circuit around
No
each regulator and
eliminate short and
open situation
No
Replace X4101
Try to replace
No
flash Rom
EEPROM
No
Replace bad resistors-
network
No
Replace TU2101