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Tuner FM does not work
Tuner FM does not work
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Check voltage at Q27 C:+5V on
Main Board whether normal or not
Yes
Check voltage +3.3V
module (TUN1 pin5) whether right or
not
Yes
Check
Tuner
pin7,pin8,pin9,I2S output
normal or not
Yes
Check the U4
output on Main Board whether
normal or not
Yes
Replace Main Board
at Tuner
module
whether
PIN25,PIN26, I2C
5-7
No
Refer to Power Board CN502
No
Check Main Board tuner power supply
circuit.
No
Change the Tuner module
Check
Main
No
supply circuit
Trouble shooting Chart
Board
U5
power
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