Read Sharp DV-760H (serv.man9) Service Manual online
DV-700S
DV-760S/H
DV-760S/H
10-2
FLOW CHART NO.9
PC 9V is not output.
Is 12V voltage supplied at pin(3) of IC9001?
No
Check the secondary circuit, AT 12V and PC 12V
line.
Yes
No
Is there output at pin(1) of IC9001?
Check the IC9001 periphery circuit.
Yes
Check for load circuit short-circuiting or leak.
FLOW CHART NO.10
PC 3.3V is not output.
Is 5V voltage supplied at pin(1) of IC9003?
No
Check the secondary circuit, AT 5V and PC 3.3V line.
Yes
Is there output at pin(2) of IC9003?
No
Check the IC9003 periphery circuit.
Yes
Check for load circuit short-circuiting or leak.
FLOW CHART NO.8
No operation is possible from the infrared remote control.
No
Operation is possible from the DVD, but no
operation is possible from the infrared remote
control.
Replace the remote control receiver or replace the
remote control transmitter is necessary.
Yes
Is 5V voltage supplied to the pin(3) terminal of
remote control receiver?
No
Check AT 5V line.
Yes
Is the "L" pulse sent out pin(1) terminal of receiver
when the infrared remote control is activated?
Yes
Replace IC504.
No
Replace the remote control receiver.
Yes
Is pulse signal supplied to the pin(32) of IC504?
No
Check the line between the remote control receiver
and the pin(32) of IC504.
FLOW CHART NO.11
The disc tray cannot be opened and closed.(For remote control is possible.)
No
Are the "L" pulse inputted into the pin(13) of
IC8201 when the KEY button is pressed?
Check the S8102 and OPEN/CLOSE KEY line.
Yes
No
Are the "L" pulse outputted from the pin(10) of
IC8201?
Replace IC8201.
Yes
No
Are the "L" pulse inputted into the pin(11) of
IC8201?
Check the TRAY ACK(L) line.
Yes
See FLOW CHART NO.12<The disc tray cannot
be opened and closed.>
FLOW CHART NO.12
The disc tray cannot be opened and closed.
No
Is the signal from the pins(70) and (69) of IC504
input into the pins(6) and (7) of iC702?
Check the LD-REV/FWD signal line between the
IC702 and the IC504.
Yes
No
Is loading motor drive voltage output from the
pins(10) and (11) of IC702?
Is 8V voltage applied to the pin(21) of IC702?
Yes
No
Is the loading motor drive voltage applied to the
pins(3) and (2) of AG connector?
Check the line between the IC702 and the AG connector.
Yes
Yes
Check for mechanism and gear engagement and
breakage.
Replace IC702.
Check AT 8V line.
No
No
No
No
Is FE signal inputted at pin(38) of IC707?
(Checking of symptom.)
Check the line between the pin(21) of IC303 and pin(38) of
IC707.
Yes
Yes
Is the focus control signal output to the pin(43) of
IC707?
Check the IC707 power source periphery circuit.
If it is normal, replace IC707.
Is the focus control signal from the pin(43) of IC504
input into the pin(19) of IC702?
Check the focus control signal (FOO) line between the
IC702 and the IC504.
Yes
No
Check the line between the IC702 and the AB connector.
No
Is the focus control drive voltage output from the
pins(17) and (18) of IC702?
Yes
Is the focus control drive voltage applied to the
pins(4) and (2) of AB connector?
Yes
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
No
No
No
No
The disc is ejected.
(In case of f
ocus error)
Does the objective lens of optical pickup move up
and down after the disc is removed?
(Checking of symptom).
See FLOW CHART NO.14<The disc is ejected. (In case
focus servo does not function.)>
Yes
Yes
Yes
Is FE signal output to the pin(21) of IC303 when the
disc is set?
Is there input signal on the pins (49, 54), (50, 55),
(46, 52), and (47, 53) of IC303?
Is there output signal on the pins(18),(17),(16) and (15) of
IC301?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
FLOW CHART NO.13
FLOW CHART NO.14
The disc is ejected.
(In case of f
ocus ser
v
o
does not function.)
Is 8V voltage applied to the pin(21) of IC702?
Yes
Replace IC702.
Check AT 8V line.
No
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