Samsung CS21A530FLKXSV Service Manual page 24

2. External Input Diagnosis
Component inputs and one monitor output (Video, Audio) are supported.
The signal is input to UOC TOP IC through the ports.
If the signal input change "and output are" to "is" not detected, check the following.
- Supplied Power: UOC TOP IC(5V, 3.3V, 8V)
- Input Problem Check: Check the connecting jacks.
MONITOR-OUT-V
AV2-IN-V
AV1-IN-L
AV-IN-V
Samsung Electronics
MONITOR-OUT-L
AV-L-IN AV-R-IN
MONITOR-OUT-R
AV1-IN-V
AV2-IN-R
AV2-IN-V
MONITOR-OUT-V
AV2-IN-L
MONITOR-OUT-L
GND
Troubleshooting
AV1-IN-L
AV1-IN-R
AV2-IN-R
Monitor-OUT-R
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