Philips BDL4230E/00 Service Manual page 119

Audio output is no sound
Check Audio board power 12V is
correctly?
Yes
Check control pin
AUDIO_SW_SE1' 2 operation
is normal
Yes
Check mute pin
AUDIO_VOL_ON is high or low
Yes
To measure audio board U1
output waveform (1K Hz
sinewave)
Yes
To measure audio board U1
output waveform
Repair Flow Chart
Check GPIO control pin (R277, R278) status
No
No Check GPIO control pin(R492) status
Check audio board U1 soldering or change
No another chip
Check audio board U6 (Power AMP)
No
soldering or change another chip
BDL4230E LCD 119