Error Troubleshooting
Xerox Internal Use Only Phaser 7100 Service Manual 2-457
+5VDC Power Troubleshooting
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
• MCU PWB, PL 12.1.15
• AC PWB, PL 12.1.16
• LVPS PWB, PL 12.2.1
• Main Harness Assembly, PL 12.3.1
• AC LV Harness Assembly, PL 12.3.4
• Power on page 7-38
Troubleshooting Procedure
Step Actions and Questions Yes No
1. Check the wiring harness connections between
the LVPS PWB and MCU PWB.
Are the connectors P/J527 and P/J451 connected
securely?
Go to step 2. Connect the
connectors P/J527 and
P/J451.
2. Check the conductivity between the LVPS PWB
and MCU PWB.
Is the connection between connectors P/J527
<=> P/J451 conducting properly?
Go to step 3. Replace the Main
Harness Assembly.
3. Check the voltage output (+5VDC) from the LVPS
PWB.
Measure the voltage between the LVPS PWB
GND <=> P/J527-1.
Is there a voltage (approx. +5VDC) output?
Replace the MCU PWB
(REP 12.4 MCU PWB
on page 4-206).
Go to step 4.
4. Turn the power Off and On then check.
Cut off the power supply, wait for a while, and
then restore the power supply.
Does an error occur?
Go to step 5. Troubleshooting
complete.
5. Check the AC voltage supply to the LVPS PWB.
Is the voltage between the LVPS PWB P/J521-1
<=> P/J521-3 110-240VAC?
Replace the LVPS PWB
(REP 12.7 LVPS PWB
on page 4-211).
Go to step 6.
6. Check the connection between LVPS PWB and AC
PWB.
Are the connectors P/J521 and P/J502 connected
securely?
Go to step 7. Connect the
connectors P/J521
and P/J502.
7. Check the conductivity between the LVPS PWB
and AC PWB.
Is the connection between P/J521 <=> P/J502
conducting properly?
Replace the AC PWB
(REP 12.5 AC PWB on
page 4-208).
Replace the AC LV
Harness Assembly.
To Next Page
Loading...
Need help?
General