Xerox DOCUPRINT N4525 Service Quick Reference Manual page 170

Table 1-102 Electrical Interference (cont'd.)
Step Actions and Questions
7 LOW VOLTAGE POWER SUPPLY ASSEMBLY
REPLACEMENT
Replace the Low Voltage Power Supply Assembly (RRP
1-67)
Is the Electrical Noise problem still present?
9 PRINT ENGINE CONTROLLER BOARD Board
REPLACEMENT
Replace the Print Engine Controller Board (RRP 1-72)
Is the Electrical Noise problem still present?
MAIN DRIVE ASSEMBLY REPLACEMENT
10
Replace the Main Drive Assembly (RRP 1-66)
Is the Electrical Noise problem still present?
11 The following components are associated with this
specific problem. One or more of these components may
have failed partially or completely. If you cannot isolate
the problem using this Fault Isolation Procedure, replace
each component listed below, one at a time, until the
problem disappears.
Lift Motors


Feed Clutches


Laser Scanner Assembly (RRP 1-47)


Offset Unit (RRP 1-54)


System Controller Board (RRP 1-73)


Input/Output Board (RRP 1-70).


1-148 DocuPrint N4525 Network Laser Printer - Service Guide
Yes No
Go to step 8 Problem
solved
Go to step 10 Problem
solved.
Go to step 11 Problem
solved.