Sharp 27DV-S100

69
27DV-S100 27DV-CS10
TROUBLESHOOTING FLOWCHARTS OF DVD SECTION
The disc tray cannot be opened and closed.
FLOW CHART No.3-1
No
No
No
Yes
Yes
No
Check the LD-RVS/FWD signal line
between IC7701 and the IC504.
Yes
Yes
FLOW CHART No.3-2
No
No
No
Yes
No
Yes
Yes
Yes
Is the signal from the pins(70) and
(69) of IC504 input into the pins(1)
and (28) of IC7701?
Check PC 8V line.
Is 8V voltage applied to the pin(8) of
IC7701?
Check for mechanism and gear
engagement and breakage.
Is FE signal inputted into the pin(150)
of IC701?
Check or replace IC701.
Check the line between the IC301
and IC701.
Is loading motor drive voltage output
from the pins(9) and (10) of IC7701?
Is the loading motor drive voltage
applied to the terminal of loading
motor?
Check the line between the IC702
and the loading motor.
Does the optical pickup move up and
down after the disc is removed?
(Checking of symptom.)
See FLOW CHART NO.6
<The [No Disc] indication.
(In case focus servo does not
function.)>
Replace IC301.
Is there input signal on the pins(52),
(53), (54) and (55) of IC301?
Is FE signal output to the pin(21)
of IC301 when the disc is set?
Check the connection of optical pickup
cable.
Replace IC7701.
The [No Disc] indication. (In case of focus error)