Troubleshooting By Blocks; Tuner Diagnosis - Samsung CS21A530FL Service Manual

Troubleshooting

4-1-4 Troubleshooting by Blocks

1. Tuner Diagnosis

If there is no signal measured even though the RF signal received by the external antenna is input to the Main Board Tuner.
- Supplied Power: 5V, 8V, 33V
- RF Trouble Check: Check CVBS output
- AUDIO Trouble Check: Check SiF Signal output
4-10
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B+5V B+33V IF
Samsung Electronics