Diagnostic Information 2-57
4025-XXX
4 SOFTWARE RELOAD
Reload print driver software.
Monitor printer operation.
Does the printer display erratic operation?
Go to step 5 Problem
solved
5 AC POWER CORD REPLACEMENT
Replace the AC Power Cord.
Monitor printer operation.
Does the printer display erratic operation?
Go to step 6 Problem
solved
6 ESS PWB REPLACEMENT
Replace the “Controller Board (ESS PWB)” on page 4-94
with a new one.
Monitor printer operation.
Does the printer display erratic operation?
Go to step 7 Problem
solved
8 MCU PWB REPLACEMENT
Replace the “Engine Board (MCU PWB)” on page 4-92.
Monitor printer operation.
Does the printer display erratic operation?
Go to step 9 Problem
solved
9 I/O PWB REPLACEMENT
Replace the “I/O PWB” on page 4-89.
Monitor printer operation.
Does the printer display erratic operation?
Go to step 10 Problem
solved
10 ELECTRICAL NOISE CHECK
Go to “Electrical Interference” on page 2-78 and
troubleshoot for a possible internal or external interference
problem.
After you finish, return to this step and monitor printer
operation.
Does the printer display erratic operation?
Go to step 11 Problem
solved
11 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
• Interlock switches and circuits
• Xerographic FRUs and HVPS - Go to “High Voltage Power
Supply (HVPS) Assembly” on page 4-88.
• Computer Interface Cable
• Operator Panel - Go to “Operator Panel” on page 4-11.
• AC Driver PWB - Go to “AC Driver PWB 120/230 VAC” on
page 4-86.
Step Actions and Questions Yes No
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