Troubleshooting
6-6
Samsung Electronics
6-7 No Audio During Record
Abnormal
Normal
Press
the "REC" button
for the recording
mode
Check the audio
signal of ICM301
Pin 7
Check the audio signal
of ICM301 Pin 98
Normal
Check the bias signal
ICM301 Pin 6
Abnormal
Check if
ICM301 Pin 16,17
is high
Normal
Abnormal
Normal
Check
the REC bias signal of
FLM501 Pin 5,6
(Over 65Khz/35Vp-p)
Abnormal
Check/Replace
QM504, QM505
Abnormal
Normal
Normal
Check if
the QM504, QM505 base
voltage is low
Check AC head
line and CNM501
Check the D,REC,
A.EE/PB/REC terminal line
(ICM601 78 Pin 94)
Replace QM501
Abnormal
Normal
Check if
the QM501, base voltage
is high
Check the D.REC
terminal line
(ICM601 Pin 78)
Check the PC 5V line
Normal
Normal
Check if
the PC 5V is applied to
FLM501 Pin 2
Abnormal
Replace FLM501
Normal
Check AC head
Check CNM501
Pin 2, 3, 4
Содержание TT20A54X/XAX
Страница 2: ...ELECTRONICS Samsung Electronics Co Ltd APR 1999 Printed in Korea 3V15A 2001 ...
Страница 50: ...PCB Layout Samsung Electronics 11 3 11 3 Main CONTROL ...
Страница 51: ...10 Wiring Diagram Wiring Diagram Samsung Electronics 10 1 ...
Страница 54: ...Schematic Diagrams 12 3 Samsung Electronics 12 3 VCR POWER BLOCK ...