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Tuner FM does not work
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
output on Main Board normal or not
Yes
Replace main Board
PIN25, PIN26, I2C
5-7
No
Check whether U6 and U10 work 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
No
supply circuit
Trouble shooting Chart
Board
U4
power
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