No Audio During Record - Samsung CXJ1331/TUCX Service Manual

Troubleshooting

6-7 No Audio During Record

Press
the "REC" button
for the recording
mode
Normal
Check the audio
signal of ICM301
Pin 7
Normal
Check the bias signal
ICM301 Pin 6
Normal
Check CNM501
Pin 2, 3, 4
Normal
Check AC head
Abnormal
Check the PC 5V line
6-6
Abnormal
Check the audio signal
of ICM301 Pin 98
Check if
the PC 5V is applied to
FLM501 Pin 2
Normal
Replace FLM501
Check if
Abnormal
ICM301 Pin 16,17
is high
Normal
Check
the REC bias signal of
FLM501 Pin 5,6
(Over 65Khz/35Vp-p)
Abnormal
Check if
the QM504, QM505 base
voltage is low
Abnormal
Check if
the QM501, base voltage
is high
Abnormal
Check the D.REC
Normal
terminal line
(ICM601 Pin 78)
Abnormal
Check the D,REC,
A.EE/PB/REC terminal line
(ICM601 78 Pin 94)
Normal
Check AC head
line and CNM501
Normal
Check/Replace
QM504, QM505
Normal
Replace QM501
Samsung Electronics