LG BD630, Service Manual

Page: 49 / 109

3-34
ONE POINT REPAIR GUIDE
When you turn on your set, it will blank / no message or hello front panel, and it will not boot-
up.
3-4. IC202 (No 1.5 V)
3-4-1. Solution
Replace IC202 on main board.
3-4-2. How to troubleshoot (Countermeasure)
1) Please check 1.5 V of C227 on main board.
2) If 1.5 V voltage doesn’t come out,
- Check IC202 Pin 2 (VCC 12VA).
If there is no 12V, please check 12 VA from SMPS. (go to previous page to check it)
3) If VCC input IC202, there are 12 V signal,
First of all check the PWR_CTL is high and if it’s high check R207, C206, L206, C274, C231, C227
and if there’s no defective component please replace IC202.
4) After changing it, if the set is still not booting:
- Check 1.1/1.2/3.3V/3.3VA is normal. (please refer to other sections of this guide)
- Check Crystal X501 refer to item 3-6.
- Check NAND flash IC(IC603) refer to item 3-7.
- Check DDR IC(IC601 ~ IC602) refer to item 3-8.
- Check MT8550L IC(IC501) refer to item 3-9.
3-4-3. Service hint (Any picture / Remark)
< Main board bottom view >
IC202