Philips HTB3510/12 Service Manual page 29

Tuner FM does not work
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Tuner FM does not work
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Check voltage at Q28 C electrode
(+5V) on Main Board whether normal
or not
Yes
Check voltage +3.3V at Tuner IC
(Pin2) whether right or not
Yes
Check Tuner module IC Pin14,
Pin15 normal or not
Yes
Check the U8 PIN25, PIN26, I2C
output on Main Board normal or not
Yes
Replace main Board
manuals search engine
5-7
Check whether U11 and U10 work
No
good or not? And fix it or replace the
main board.
No
Check Main Board tuner power supply
circuit.
No
Change the Tuner IC
Check Main Board
No
supply circuit
Trouble shooting Chart
U4 power