Denon DVM725 Service Manual page 16

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FLOW CHART NO.14
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 5V voltage supplied to the Pin(3) terminal of
the infrared remote control receiver (RM2001)?
Is the "L" pulse sent out Pin(1) terminal of receiver
(RM2001) when the infrared remote control is activated?
Is the "L" pulse supplied to the Pin(6) of IC3001?
Is the "L" pulse supplied to the Pin(22) of CN1001?
Replace the DVD Main CBA Unit or DVD Mechanism.
FLOW CHART NO.15
The disc tray cannot be opened and closed. (It can be done using the remote control unit.)
Is the normal control voltage inputted to Pin(40) of
IC3001?
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L 13942296513
Refer to "FLOW CHART NO.16" <The disc tray
cannot be opened and closed.>
FLOW CHART NO.16
The disc tray cannot be opened and closed.
Replace the DVD Main CBA Unit.
No improvement can be found.
Replace the DVD Mechanism.
FLOW CHART NO.17
[No Disc] indicated. (When the focus error occurs.)
Replace the DVD Main CBA Unit.
No improvement can be found.
Replace the DVD Mechanism.
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No
Check EV+5V line and service it if defective.
Replace the infrared remote control receiver (RM2001).
No
Or replace the remote control unit.
No
Check the line between Pin(1) of RM2001 and
Pin(6) of IC3001, and service it if defective.
No
Check the line between Pin(1) of RM2001 and
Pin(22) of CN1001, and service it if defective.
No
Replace the "OPEN/CLOSE" button (SW2209).
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No
Original DVD Main CBA Unit is poor.
No
Original DVD Main CBA Unit is poor.
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DVM725
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