Samsung TB531VCT1X/XSA Service Manual page 122

6-28 Audio Signal Missing After Recording
Audio Signal in
E-E Mode
Place VCR in REC Mode
ICM301, 80 pin : High
(Audio Head SW)
FLM01 2 pin :
FLM501 6 Pin : MIN 40Vp-p
ICM301 5 pin :
ICM301 79 pin
Audio Signal
ICM301 1 pin REC
audio signal
ICM301 3 pin :
REC bias signal
CNM501 1, 3 Pin
Replace CNM501
Samsung Electronics
Check
No
Yes
Yes
Check
No
Yes
Check
No
5V
Yes
Check
No
3~5V
Yes
Check
No
Yes
Check
No
Yes
Check
No
Yes
Check
No
Yes
Check CNM001 6 pin :
REC Audio Signal
No
Check TV part
A/V SW or RF Block
Check ICM301 63,64 pin :
2
(I C CLK, data)
Check PC 5V Line
Check CM573, CM574,
CM572, RM572, RM573,
RM576, QM574, RM576
Check RM598, RM582,
RM569,RM570, CM578,
CM570, RM568
Replace ICM301
Check RM585,
RM586, CM583
Check A/C
Head Assembly
Troubleshooting
6-21