DV-S15 (serv.man9). Troubleshooting - Sharp DVD Service Manual (repair manual). Page 3

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E56H0TS

No operation is possible from the remote control unit.

Operation is possible from the DVD, but no
operation is possible from the remote control unit.

Is no operation possible if replacing the remote 
control unit?

Replace the infrared remote control receiver.

Original remote control unit is poor.

Check the line between the infrared remote control 
receiver and Pin(26) of CN1001.

Replace DVD Main CBA unit.

Is the "L" pulse sent out from Pin(1) terminal of the 
receiver when the infrared remote control is activated?

Is the "L" pulse signal supplied to Pin(26) of 
CN1001 from Pin(1) of receiver? (Be operated by 
SEARCH(-), SEARCH(+), PLAY, STILL/PAUSE, 
STOP, POWER and OPEN/CLOSE button.)

Yes

Yes

Yes

Is 5V voltage supplied to Pin(3) terminal of infrared
remote control receiver?

Yes

Yes

No

PON 12V is not outputted.

Is PON12V voltage supplied to the collector of Q1002?

Does the P-ON switch circuit operate normally?
(Q1005, Q1006, D1036, etc.)

Replace Q1002.

Check D1009, C1012 and the periphery circuit.

Check each component, and replace.

Yes

Yes

No

No

No

Check EV 5V line.

No

No

PON 5V is not outputted. (PON 12V is outputted normally.)

Is 5V 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 the 
periphery circuit.

Check D1046 and the periphery circuit.

Yes

Yes

No

-FL is not outputted.

Is -24V voltage supplied to the anode of D1003?

Check D1003 and periphery circuit.

Check if there is any leak or short-circuit on the 
loaded circuit.

Yes

No

PON 3.3V is not outputted.

Is 3.3V voltage supplied to the emitter of Q1011?

Does the P-CON switch circuit operate normally?
(Q1005, Q1006, etc.)

Replace Q1011.

Check D1008, D1015, C1007, C1038 and the 
periphery circuit.

Check each component, and replace.

Yes

Yes

No

No

No