Philips HTS3538 Service Manual page 39

Tuner FM does not work
Tuner FM does not work
Go
Check voltage at FB25:+3.3V on
Main Board whether normal or not
Yes
Check voltage +3.3V
module (TUN1 pin8) whether right or
not
Yes
Check Tuner module pin8,pin9, I2S
output whether normal or not
Yes
Check the U1 PIN53, PIN54. I2C
output on Main Board whether
normal or not
Yes
Replace Main Board
5-7
No
at Tuner
No
No
No
Refer to Power Board CN502
Check Main Board tuner power supply
circuit.
Change the Tuner module
Check Main Board
supply circuit
Trouble shooting Chart
U1 power