3-4
ONE POINT REPAIR GUIDE
2. NO BOOTING WHEN POWER ON THE SET
The set doesn’t work when press the power button on the display board or the remote control.
2-1. FLASH MEMORY
2-1-1. Solution
Please check and replace IC502 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Check 3.3 V to CN503 in standby mode.
If there is no 3.6 V, check the SMPS.
2) Check 12 V, F+, F- and PVDD when power on the set.
If the set doesn’t work regardless of what the KEY2 changes high to low while pressing the power
button. X500 and X501 work normally but, if you can not power on the set, replace IC502 with a new
one on the MAIN board.
2-1-3. Service hint (Any picture/ Remark)
< Main board top view >
< Main board bottom view >
IC502
IC502
AR514
AR514
PWR_CTRL
PWR_CTRL
AR504
AR504
KEY2
KEY2
Содержание OM4560
Страница 13: ...2 2 ...
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Страница 49: ...3 34 3 33 BLOCK DIAGRAMS 1 SYSTEM BLOCK DIAGRAM ...
Страница 51: ...3 38 3 37 3 AUDIO PATH BLOCK DIAGRAM ...
Страница 52: ...3 40 3 39 4 POWER BLOCK DIAGRAM ...
Страница 55: ...3 64 3 63 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 56: ...3 66 3 65 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 57: ...3 68 3 67 4 JACK P C BOARD 5 SPEAKER LED DISPLAY P C BOARD TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...
Страница 58: ...3 70 3 69 ...