Audio Troubleshooting - Haier 48E2500 Service Manual

Service Manual
Model No.: 48E2500
9 Audio Trouble
sound)
Check the power supply circuit
Check the control circuit
Check the circuit from U1
to AMP
Check the circuit between output jack
and AMP chip, Change AMP chip
10 Function Trouble
Check the RF source
Check power supply circuit
Check IIC circuit
Check tuner and
peripheral components
No
Check the AMP power
N
TV video
Check input RF signal
N
No sound
Y
Check if PIN1 of the AMP chip
voltage is normal
N
Check the input signal
N
Check the output signal
N
Check the circuit from AMP to the jack
TV can't search any
channel/no picture
Y
Check tuner power
N
Check if IIC work
N
Check IFP/IFN output signal
N
Check the circuit from
tuner to U1(MSD3393)
- 50 -
Y
Y
Y
Y
Y
Y