Read Sharp DV-620 (serv.man3) Service Manual online
DV-620H
DV-620S
DV-620S
17
FLOW CHART NO.8
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.
Is 5V voltage supplied to the pin(3) terminal of
remote control receiver?
Check AT 5V line.
Is the "L" pulse sent out pin(1) terminal of receiver
when the infrared remote control is activated?
Replace the remote control receiver.
Is pulse signal supplied to the pin(4) of IC8201?
(Although SERCH(-), SERCH(+), PLAY, STILL/
PAUSE and STOP button is possible, does not
function at POWER and OPEN/CLOSE button.)
Check the line between the remote control receiver
and the pin(4) of IC8201.
Replace IC8201.
FLOW CHART NO.9
Is 12V voltage supplied at pin(1) of IC9001?
Check the secondary circuit, AT 12V and PC 12V
switch(Q9027)
circuit.
Is voltage of 9V sent out from the pin(2) of IC9001?
Check for load circuit short-circuiting or leak.
Check the IC9001 periphery circuit.
Does the P-CON switch circuit is operate ally?
(Q9020-1, Q9027, D9042, D9034, D9046, etc.)
Are the "H" pulse inputted into the pin(9) of
IC8201?
Replace IC8201.
Replace IC9002.
Check each component and if poor the replace.
Check or replace D9035-9, D9044-5.
Is 12V voltage supplied at pin(1) of IC9002?
Check the PC 12V line.
Is voltage of 8V sent out from the pin(2) of IC9002?
Check for load circuit short-circuiting or leak.
Check the IC9002 periphery circuit.
Is pulse signal supplied to the pin(32) of IC504?
(Although POWER and OPEN/CLOSE button is
possible, does not function at SERCH(-), SERCH
(+), PLAY, STILL/PAUSE and STOP button.)
Check the line between the remote control receiver
and the pin(32) of IC504.
Replace IC504.
No
No
No
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
FLOW CHART NO.10
No operation is possible from the infrared remote control.
PC 9V is not output.
PC 8V is not output.(PC 9V is possible)
FLOW CHART NO.12
Is -19V voltage supplied at emitter of Q9025?
Check the AT -19V line.
Is voltage of -19V sent out from the collector of
Q9025?
Check for load circuit short-circuiting or leak.
Check each component and if poor the replace.
Does the P-CON switch circuit is operate normally?
(Q9020, D9046, etc.)
Check the Q9025 periphery circuit.
Check the secondary circuit, AT 5V line.
Check for load circuit short-circuiting or leak.
Check each component and if poor the replace.
FLOW CHART NO.13
FLOW CHART NO.11
Is 5V voltage supplied at emitter of Q9023?
Check the AT 5V line.
Is voltage of 5V sent out from the collector of
Q9023?
Check for load circuit short-circuiting or leak.
Check the Q9023 periphery circuit.
Does the P-CON switch circuit is operate normally?
(Q9020-1, D9042, D9032, D9046, etc.)
Are the
"H" pulse inputted into the pin(9) of
IC8201?
Replace IC8201.
Check each component and if poor the replace.
Check or replace D9035-9, D9044-5.
Are the
"H" pulse inputted into the pin(9) of
IC8201?
Replace IC8201.
Is 5V voltage supplied at pin(1) of IC9003?
Is voltage of 3.3V sent out from the pin(2) of
IC9003?
Check the IC9003 periphery circuit.
Does the P-CON switch circuit is operate normally?
(Q9020-1, D9030-1, D9042, D9046, etc.)
Check or replace D9035-9, D9044-5.
Are the
"H" pulse inputted into the pin(9) of
IC8201?
Replace IC8201.
Check or replace D9035-9, D9044-5.
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
Yes
PC 5V is not output.
PC -19V is not output.
PC 3.3V(1), (2) is not output.
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