Usb - LG S94T1-S Service Manual

7. NO USB
When unit is connected to USB, no audio and video from SET.
7-1. IC501 (MT8580)
7-1-1. Solution
Replace IC501 (MT8580).
7-1-2. How to troubleshoot (Countermeasure)
1) Check CN202 connector and FFC cable.
2) If there is short soldering on CN202, re-soldering CN202.
3) If problem still occurs, check 5 V (CN202 pin4 ~ pin8).
- If no output, check IC152 on MAIN board.
- If OK, check USB1+, USB1- signal.
- If there is no signal, replace IC501.
7-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
Pin10 (TP201) : USB1+
< JACK (Without Mic) board bottom view >
Pin10 (TP201) : USB1+
< JACK board bottom view >
2-43
Pin4~8 (TP211) : 5 V
CN202
Pin11 (TP202) : USB1-
Pin4~8 (TP211) : 5 V
CN202
Pin11 (TP202) : USB1-