Sharp DV-S2U Service Manual - Page 21

E56b0ts, Flow Chart No.7

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E56B0TS 1-8-2 FLOW CHART NO.7 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. Yes Is no operation possible if replacing the remote No control unit? Yes No Is 5V voltage supplied to Pin(3) terminal of infrared remote control receiver? Yes Is the "L" pulse sent out from Pin(1) terminal of the No receiver when the infrared remote control is activated? Yes No Is the "L" pulse signal supplied to Pin(26) of CN1001 from Pin(1) of receiver? (Be operated by SEARCH(-), SEARCH(+), PLAY, STILL/PAUSE, Yes STOP, POWER and OPEN/CLOSE button.) FLOW CHART NO.8 PON 12V is not outputted. Is PON12V voltage supplied to the collector of Q1002? No Yes No Does the P-ON switch circuit operate normally? (Q1005, Q1006, D1036, etc.) Yes Replace Q1002. FLOW CHART NO.9 PON 5V is not outputted. (PON 12V is outputted normally.) Is 5V voltage supplied to the collector of Q1004? No Yes Is the "H" pulse inputted into the base of Q1004? No Yes Replace Q1004. Original remote control unit is poor. Check EV 5V line. Replace the infrared remote control receiver. Check the line between the infrared remote control receiver and Pin(26) of CN1001. Replace DVD Main CBA unit. Check D1009, C1012 and the periphery circuit. Check each component, and replace. Check D1030, D1048, C1035, C1048 and the periphery circuit. Check D1046 and the periphery circuit. FLOW CHART NO.10 -FL is not outputted. Is -24V voltage supplied to the anode of D1003? No Yes Check if there is any leak or short-circuit on the loaded circuit. FLOW CHART NO.11 PON 3.3V is not outputted. Is 3.3V voltage supplied to the emitter of Q1011? No Yes Does the P-CON switch circuit operate normally? No (Q1005, Q1006, etc.) Yes Replace Q1011. Check D1003 and periphery circuit. Check D1008, D1015, C1007, C1038 and the periphery circuit. Check each component, and replace. FLOW CHART NO.12 PON 1.8V is not outputted. Is 2.5V voltage supplied at pin(1) of IC1002? No Yes No Is the "H" pulse inputted into pin(4) of IC1002? Yes Replace IC1002. Check D1013, C1014 and the periphery circuit. Check PWRCON line. FLOW CHART NO.13 The disc tray cannot be opened and closed. (It can be done using the remote control unit.) No Is 0V voltage supplied to Pin(25) of CN1001 when the OPEN/CLOSE button is activated on the DVD? Check the SW2014 and OPEN/CLOSE button. Yes See FLOW CHART NO. 14.

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1-8-2
E56B0TS
FLOW CHART NO.7
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
FLOW CHART NO.8
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
FLOW CHART NO.9
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
FLOW CHART NO.10
-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
FLOW CHART NO.11
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
FLOW CHART NO.12
PON 1.8V is not outputted.
FLOW CHART NO.13
The disc tray cannot be opened and closed.
(It can be done using the remote control unit.)
Is 2.5V voltage supplied at pin(1) of IC1002?
Is 0V voltage supplied to Pin(25) of CN1001 when
the OPEN/CLOSE button is activated on the DVD?
See FLOW CHART NO. 14. <The disc tray cannot be opened and closed.>
Is the "H" pulse inputted into pin(4) of IC1002?
Replace IC1002.
Check D1013, C1014 and the periphery circuit.
Check PWRCON line.
Check the SW2014 and OPEN/CLOSE button.
Yes
Yes
No
Yes
No
No