Read Sharp DV-S15 (serv.man18) Service Manual online
1-8-1
E56H0TS
TROUBLESHOOTING
FLOW CHART NO.1
FLOW CHART NO.2
The power cannot be turned on.(1)
FLOW CHART NO.3
The fuse blows out.
After servicing, replace the fuse.
The power cannot be turned on.(2)
Is the fuse normal?
Is normal state restored when once unplugged
power cord is plugged again after several seconds?
power cord is plugged again after several seconds?
Is the EV 5V line voltage normal?
Is the voltage of secondary side normal?
Does the change from STANDBY LED indicate
turn-off?
turn-off?
Is the voltage of 3.3V supplied to Q2021?
Is the "H" signal inputted to the base of Q2021,
when the POWER button activated on the DVD?
when the POWER button activated on the DVD?
Is the "H" signal inputted at base of Q2021,
when the POWER button activated on the remote
control unit?
when the POWER button activated on the remote
control unit?
Replace Q2021.
The STANDBY LED indicate is flashing after 0.5 sec.
Are the "P-ON-H" pulse outputted from the
pin(20) of CN1001?
pin(20) of CN1001?
Is the P-CON switch circuit operated normally?
(Q1002, Q1005, Q1006, IC1002, D1036, D1046)
(Q1002, Q1005, Q1006, IC1002, D1036, D1046)
Check the presence that the primary component
is leaking or short then service it if defective.
is leaking or short then service it if defective.
See FLOW CHART No.3 <The fuse blows out.>
Check if there is any leak or shor-circuit on the
primary circuit component?
(Q1001, Q1003,T1001, D1001, D1002, D1004,
D1005, D1011, C1003, C1005)
primary circuit component?
(Q1001, Q1003,T1001, D1001, D1002, D1004,
D1005, D1011, C1003, C1005)
Check each rectifying circuit of secondary circuit.
Check the EV 3.3V line.
Check the POWER button line.
Check the line between the remote control
receiver and Pin(26) of CN1001.
receiver and Pin(26) of CN1001.
Replace the DVD Main CBA Unit.
Check each component, and replace.
Check the presence that the rectifying diode or
circuit is shorted in each rectifying circuit of
secondary side then service it if defective.
circuit is shorted in each rectifying circuit of
secondary side then service it if defective.
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes (below, confirmed operating at LED turn-off of 0.5 sec. interval.)
Yes
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