Diagnostic information 2-113
7526
902.59—Engine software error, NVRAM MGR problem
920.03, 920.25—Transfer Module Missing error service check
Step Questions / actions Yes No
1 1. Turn off the printer.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
3. Check JPH1 and JTPS1 for proper
connection and damage.
4. Check the transport cable on the transfer
belt module side for any damage.
Is either of the cables damaged?
If the JTPS1 cable is
damaged, replace the
JTPS1 cable.
If the JPH1 cable is
damaged, replace the
printhead assembly. See
“Printhead removal,
installation, and
adjustment” on
page 4-148
Go to step 2.
2
1. Reseat the JPH1 and JTPS1 cables.
2. Reseat the transport cable on the transfer
belt module side.
3. Power on the printer.
Does the problem persist?
Go to step 3. Problem resolved.
3
Install a new transfer module to verify if the
old transfer module is defective.
Does the problem persist?
Go to step 4. Replace the transfer
module. See “Transfer
module removal” on
page 4-188.
4
Connect a new transport cable from outside
of the machine.
Does the problem persist?
1. Return the old transfer
module and transport
cable.
2. Go to step 5.
Replace the transport
cable. See “Transport
cable removal” on
page 4-190.
5
Connect a new printhead assembly from
outside of the printer and verify the printhead.
See “Printhead verification” on page 3-52.
Does the problem persist?
Replace the system board.
See “System board
removal” on page 4-165.
Replace the printhead
assembly. See “Printhead
removal, installation, and
adjustment” on
page 4-148
Step Questions / actions Yes No
1 Open the front access door. Reseat the
transport cable.
Did the error clear?
Problem resolved. Go to step 2.
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