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3
Troubleshooting
CAUTION
Overview
This chapter provides information for troubleshooting problems with the
M3500B/M5500B. The "Troubleshooting and Repair Methodology" section
of this chapter (page 3-2) provides an overview of the steps needed to isolate
and repair unit problems.
Repair Philosophy
The repair philosophy of the M3500B/M5500B is subassembly replacement.
Examples of subassemblies are the printer, the Control PCA, and selected
connectors and other items. Repairs that involve replacing components on a
PCA are not supported.
Individual component replacement should not be attempted outside of a fac-
tory authorized repair facility. Component level repair is extremely difficult
due to the extensive use of surface mount technology and the high parts-den-
sity on the circuit boards. Unauthorized component replacement can impair
performance of the M3500B/M5500B.
Equipment Required
Troubleshooting requires the same test equipment as does Performance Verifi-
cation. See "Test Equipment" on page 2-8.
3
3-1
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