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5061
925.02 error code service check
Fuser fan (main fan)
Step
Actions and questions
1
Turn the power off, manually spin the fan, and check
that it rotates freely.
Does the fan rotate freely?
2
Check the fuser fan cable connection to the system
board JM1 for correct installation.
Is the cable installed correctly?
3
Disconnect the fuser fan from JM1 on the system
board, and check the voltages on JM1.
Pin
JM1-1 +1.6 V dc
JM1-2 0 V
JM1-3 +1.9 V dc
JM1-4 +24 V dc
JM1-5 Ground
Are the voltages correct?
926.01 error code service check
VTB fan
Step
Actions and questions
1
Turn the power off, manually spin the fan, and check
that it rotates freely.
Does the fan rotate freely?
2
Check the VTB fan cable connection to the system
board JY1 for correct installation.
Is the cable installed correctly?
3
Disconnect the VTB fan from JY1 on the system board,
and check the voltages on JY1.
Pin
JY1-1
JY1-2
JY1-3
JY1-4
Are the voltages correct?
2-54
Service Manual
Fan on
Fan off
Fan disconnected
Fan switch on
+3.3 V dc
+3.3 V dc
0 V
0 V
0 V dc
0 V
+24 V dc
+24 V dc
Fan on
Fan off
Fan
disconnected
fan switch on
+1.6V dc
+3.3 V dc
+3.3 V dc
0 V
0 V
0 V
+3.1 V dc
0 V dc
0 V
+24 V dc
+24 V dc
+24 V dc
Yes
Go to step 2
Go to step 3
Replace the fuser
fan. See
"Fuser
fan removal" on
Fan discon-
page
4-47.
nected
Fan switch
off
+3.3 V dc
0 V
+2 V dc
+24 V dc
Yes
Go to step 2
Go to step 3
Replace the VTB
fan. See
"Vacuum
Fan
transport belt
disconnected
(VTB) fan
fan switch off
removal" on
page
4-97.
+3.3 V dc
0 V
+2 V dc
+24 V dc
No
Replace the fuser
fan. See
"Fuser
fan removal" on
page
4-47.
Install the cable
correctly.
Replace the
system board.
See
"System
board removal"
on page
4-89.
No
Replace the VTB
fan. See
"Vacuum
transport belt
(VTB) fan
removal" on
page
4-97.
Install the cable
correctly.
Replace the
system board.
See
"System
board removal"
on page
4-89.
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