Panasonic DP-C321 Service Handbook page 194

3-120
3. 3. 3. 3 Switch (Normal/Open) Failure FIP
2003
Enter DC330 [XXX-XXX]. Turn On the Switch. Is [LOW]
displayed?
Y N
Is +5 VDC measured between Pin 2(+) of the Switch and
GND(-)?
Y N
Check the wire between the switch Pin 2 and the
PWB Pin 3 for an open circuit and poor contact.
If no problems are found, replace the PWB.
Is +5 VDC measured between Pin 1(+) of the Switch and
GND(-)?
Y N
Replace the switch.
Check the wire between the PWB Pin 4 and the switch Pin
1 for an open circuit and poor contact.
If no problems are found, replace the PWB.
Turn Off the Switch. Is the display [HIGH]?
Y N
Remove the Connector of the Switch. Is the display
[HIGH]?
Y N
Check a short circuit of the circuit between the switch
Pin 2 and the PWB Pin 3.
If no problems are found, replace the PWB.
Replace the switch.
Check the switch for improper installation.
If no problems are found, replace the switch.
3. 3. 3. 4 Solenoid/Clutch Not Energized Failure FIP
2004
Before performing this FIP, ensure that there is no
mechanical problem for the solenoid and clutch.
Go to the DC330 [XXX-XXX] and turn it On.
Is +24 VDC measured between the PWB Pin 3 (+) and GND
(-)?
Y N
Is +24 VDC measured between Pin 2(+) of the Solenoid/
Clutch and GND(-)?
Chapter 3 Troubleshooting
Y N
Is +24 VDC measured between Pin 1(+) of the Sole-
noid/Clutch and GND(-)?
Y N
Check the wire between the PWB Pin 4 and the
solenoid/clutch Pin 1 for an open circuit and
poor contact.
If no problems are found, replace the PWB.
Replace the solenoid/clutch.
Check the wire for the circuit between the PWB Pin 3 and the
solenoid/clutch Pin 2 for an open circuit and poor contact.
Replace the PWB.
3. 3. 3. 5 Solenoid/Clutch Left Energized Failure FIP
Turn Off the power.
Remove the PWB connector.
Is the resistance 10 Ohm or less between the connector Pin 3
and the frame?
Y N
Replace the PWB.
Check a short circuit of the circuit between the connector Pin 3
and the solenoid/clutch Pin 2.
If no problems are found, replace the solenoid/clutch.