2-35
ONE POINT REPAIR GUIDE
2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“PLEASE WAIT” ON FRONT PANEL
When you turn on your set, it will blank / no message or “PLEASE WAIT” display on front panel, and
it will not boot-up.
2-7. IC502, IC503 (DDR3 MEMORY)
2-7-1.
Solution
Replace IC502, IC503 on MAIN board.
2-7-2. How to troubleshoot (Countermeasure)
1)
Please check 0.75 V of DDR3_VREF (C545).
Please check 1.5 V of C523.
2)
If it doesn’t work even though IC150, IC155, IC151, IC101 are no problem,
IC502, IC503 (DDR memory) could have problem.
3)
After changing it, if the set is still not booting :
- Check MT8560 IC (IC501) refer to item 2-8.
- Check MAIN board refer to item 2-9.
2-7-3. Service hint (Any picture / Remark)
< MAIN board bottom view >
< MAIN board top view >
IC501
IC502
IC503
IC504
DDR3_VREF
C545
C523
Содержание BH4120SN
Страница 56: ...2 47 WAVEFORMS IC501 MT8560 X TAL 27 MHz 1 1 7 8 10 9 1 SYSTEM PART 1 ...
Страница 59: ...2 50 WAVEFORMS H_SDA H_SCL 11 12 5 HDMI PART 12 11 ...
Страница 60: ...2 51 WAVEFORMS HDMI_CLK_N 13 13 12 11 14 HDMI_0_N 14 JK803 ...
Страница 61: ...2 52 ...
Страница 79: ...2 87 2 88 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 80: ...3 AMP P C BOARD TOP VIEW BOTTOM VIEW 2 89 2 90 ...
Страница 81: ...4 JACK P C BOARD 5 FRONT P C BOARD TOP VIEW BOTTOM VIEW 2 91 2 92 TOP VIEW BOTTOM VIEW ...
Страница 83: ...3 2 ...
Страница 87: ...A800 Front SPK A700 Center SPK A600 Rear SPK 4 SPEAKER SECTION 4 1 FRONT CENTER REAR SPEAKER ...
Страница 88: ...A900 4 2 PASSIVE SUBWOOFER ...
Страница 89: ......
Страница 103: ...4 14 MEMO ...