2-20 Service Manual
4025-XXX
Error Code 915
There is a problem with the Fuser Fan.
Logic Control on the MCU PWB received a Fan Alarm signal from the Fuser Fan.
Error Code 916
There is a problem with the LVPS Fan.
Logic Control on the MCU PWB detected a problem with the LVPS Fan.
Step Actions and Questions Yes No
1 +24VDC CHECK
Measure the voltage at P/J456-1 and FG on the I/O PWB.
Is there +24VDC between J456-1 and FG?
Replace the
“Fuser Fan”
on page 4-68
Use the Block
Diagrams in
the printer
service
manual to
troubleshoot a
loss of
+24VDC
2 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• I/O PWB - Go to “I/O PWB” on page 4-89.
Step Actions and Questions Yes No
1 +24VDC CHECK
Measure the voltage between J220-1 and FG and P/J411-B3
on the MCU PWB and FG.
Is there +24VDC between J220-1 and FG and P/J411-B3 on
the MCU PWB and FG?
Replace the
“Fan
Assembly”
on page 4-84
Go to Step 2
2 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• I/O PWB - Go to “I/O PWB” on page 4-89.
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