Philips DVP3355V/F7 Service Manual page 24

2 DVD Section
FLOW CHART NO.1
The key operation is not functioning.
Are the contact point and the installation state of
the key switches (SW2001, SW2002, SW2003,
SW2005, SW2006) normal?
When pressing each key switches (SW2001,
SW2002, SW2003, SW2005, SW2006), do the
voltage of each pin of CN1001 (shown below)
change to "H" (+3.3V)
from "L" (0V)?
SW2001 → CN1001 24PIN
SW2002 → CN1001 26PIN
SW2003 → CN1001 25PIN
SW2005 → CN1001 18PIN
SW2006 → CN1001 19PIN
Replace DVD Main CBA Unit.
FLOW CHART NO.2
No DVD operation is possible from the remote control unit. (Operation is possible from the unit.)
Is approximately +5V voltage supplied to Pin(3)
terminal of the RM2001 (remote control receiver)?
Is the "L" pulse sent out from Pin(1) terminal of the
RM2001 (remote control receiver) when the remote
control unit is activated?
Is the "L" pulse signal supplied to Pin(22) of
CN1001?
Replace the DVD Main CBA Unit.
FLOW CHART NO.3
The disc tray cannot be opened and closed. (It can be done using the remote control unit.)
Does the voltage of Pin(24) on CN1001 become
to +3.3V from 0V when pressing "OPEN/CLOSE"
button on the unit?
Refer to "FLOW CHAR NO.4" <The disc tray
cannot be opened and closed.>
FLOW CHART NO.4
The disc tray cannot be opened and closed. (It can not be done using the unit and the remote control unit.)
The [No Disc] indication.
Both picture and sound do not operate normally.
Replace the DVD Main CBA Unit.
No improvement can be found.
Replace the DVD Mechanism.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Re-install the key switches (SW2001, SW2002,
SW2003, SW2005, SW2006) correctly or replace
the poor switch.
No
Check the key switches (SW2001, SW2002,
SW2003, SW2005, SW2006) and their periphery,
and service it if defective.
No
Check AL+5V(1) line, and service it if defective.
No
Replace the RM2001 (remote control receiver).
Replace remote control unit if needed.
No
Is the "H" pulse inputted to the base of Q2014?
Yes
Replace Q2014.
No
Replace the "OPEN/CLOSE" button (SW2001).
No
Original DVD Main CBA Unit is poor.
1-10-4
No
Replace IC501.
E8E6DTR