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ONE POINT REPAIR GUIDE
5. NO USB
When unit is connected to USB, no audio and video from SET.
5-1. IC500 (MT1389)
5-1-1. Solution
Change IC500 (MT1389).
5-1-2. How to troubleshoot (Countermeasure)
1) MAIN board : Check CN103 connector and FFC cable.
JACK board : Check CN2A3 connector.
2) If there is short soldering on CN103, re-soldering CN103.
If there is short soldering on CN2A3, re-soldering CN2A3.
3) If problem still occurs, check 5V (CN103 pin8, 9).
- If no output, check MAIN board IC102.
- If OK, check D+, D- signal.
- If there is no signal, replace IC500.
5-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< JACK board top view >
CN2A3
CN103
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