Read Panasonic PT-TX400 / PT-TX310 / PT-TW340 / PT-TX210 / PT-TW250 (serv.man3) Service Manual online
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Troubleshooting
No audio output
Follow the procedures below.
Check IC5202 and peripheral circuit.
Check if the power supply of
L5007and L5008 reaches 5.5V
Check if the power supply of
L5007and L5008 reaches 5.5V
Yes
Check related circuits of Q50011/Q5010/Q5005/Q5001.
Check the voltage of pin
4 and pin9 is more than
3V.
4 and pin9 is more than
3V.
No
1. Check if the loudspeaker cable is plugged or broken.
2. Check if the loudspeaker is damaged.
2. Check if the loudspeaker is damaged.
Check pin 43 and 46 of
IC5007 have audio signal
output.
IC5007 have audio signal
output.
No
Yes
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