Xerox Phaser 7500 Service Manual page 176

Error Messages and Codes
3-38
Troubleshooting Procedure (Continued)
Step Actions and Questions
3 Turn Off the power, then measure the
Tray 4 Feed/ Lift Up Motor wire
wound resistance.
Remove the Tray 4 Feed/ Lift Up
Motor, then measure the following
resistances.
Between J222 pin-1 and J222 pin-2
■
Between J222 pin-3 and J222 pin-4
■
Is the resistance approximately 4
Ohm for each?
4 Check the connection between the
Tray Module PWB J550 and the Tray
4 Feed/ Lift Up Motor J222 for open
circuit, short circuit, and poor contact.
Is it conducting properly?
5 Perform the TM Takeaway Motor
test in Diagnostics.
Does the Motor operate properly?
6
Is the voltage between the TM
Takeaway Motor J224-2/5 (+) and the
GND (-) +24VDC?
7 Turn Off the power, then measure the
TM Takeaway Motor wire wound
resistance.
Remove the TM Takeaway Motor,
then measure the following
resistances.
Between J224 pin-1 and J224 pin-2
■
Between J224 pin-3 and J224 pin-2
■
Between J224 pin-4 and J224 pin-5
■
Between J224 pin-6 and J224 pin-5
■
Is the resistance approximately 0.85
Ohm for each?
Yes No
Go to step 4. Replace the
Tray 4
Feed/ Lift Up
Motor
(REP 10.3,
page 8-93).
Replace the Reconnect the
following parts wiring harness
in sequence: connectors.
Tray Module
■
PWB (REP
10.9,
page 8-97)
TM Relay
■
PWB (REP
18.14,
page 8-205)
Motor Drive
■
PWB (REP
18.13,
page 8-204)
MCU PWB
■
(REP 18.12,
page 8-202)
Go to step 9. Go to step 6.
Go to step 7. Refer to
VDC Power"
on page
Go to step 8. Replace the
TM
Takeaway
Motor
(REP 10.11,
page 8-99).
Phaser 7500 Printer Service Manual
"+24
4-16.