Read Sharp DX-AT50H (serv.man15) Service Manual online
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DX-AT50H
FLOW CHART NO.11
P-ON 1.8 V is not outputted.
FLOW CHART NO.12
The disc tray cannot be opened and closed.
(It can be done using the remote control unit.)
(It can be done using the remote control unit.)
FLOW CHART NO.13
The disc tray cannot be opened and closed.
Is 2.5 V voltage supplied to Pin (1) of IC1002 ?
Is 5 V pulse supplied to Pin (46) of IC2001 when
the OPEN/CLOSE button is activated on the DVD ?
the OPEN/CLOSE button is activated on the DVD ?
See FLOW CHART NO. 13. <The disc tray cannot be opened and closed.>
Is the "H" pulse inputted into Pin (4) of IC1002 ?
Replace IC1002.
Replace the DVD Main CBA Unit.
No improvement can be found.
Replace the DVD Mecha.
Check D1013, C1014 and their periphery circuit.
Check PWRCON line.
Check the SW2003 and OPEN/CLOSE button.
The malfunction of the original DVD Main CBA Unit.
Yes
Yes
No
Yes
No
No
No
Yes
FLOW CHART NO.10
P-ON 3.3 V is not outputted.
Is 3.3 V voltage supplied to the emitter of Q1011 ?
Does the P-CON switch circuit operate normally ?
(Q1005, Q1006, etc.)
(Q1005, Q1006, etc.)
Replace Q1011.
Check D1008, D1015, C1007, C1038 and their
periphery circuit.
periphery circuit.
Check each component and if poor, then replace.
Yes
Yes
No
No
FLOW CHART NO.9
P-ON 5 V is not outputted. (PON 12 V is outputted normally.)
Is 5 V voltage supplied to the collector of Q1004 ?
Is the "H" pulse inputted into the base of Q1004 ?
Replace Q1004.
Check D1030, D1048, C1035, C1048 and their
periphery circuit.
periphery circuit.
Check Q1004, D1046 and the periphery circuit.
Yes
Yes
No
No
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