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4-6 magicolor 330 - Base Engine Service Manual
Primary Fault Isolation Procedures
4.2 - Erratic Printer Operation
The printer has a variety of intermittent problems, but generally does not complete a print cycle. The problems are
generally not identified by displayed error messages.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
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 FIP, replace each component listed below, one at a time,
until the problem disappears.
• Interlock switches and circuits
• Components connected to the MCU PWB
• Wiring and connectors linking the components
1
Does the printer frequently fail to enter printer warm-up or is
the Control Panel frequently inoperative?
Go to FIP 4.1
Inoperative
Printer
Go to step 2
2
LVPS LOADING CHECK
1. Run 50 Test Prints.
2. Measure the voltage between P33-3 on the LVPS and Frame
Ground, and between P32-11 on the LVPS and Frame Ground.
Is there a steady +5VDC between P33-3 and Frame Ground, and
is there at steady +24VDC between P32-11 and Frame Ground?
Go to step 3 Replace the
LVPS (RRP
9.119)
3
HOST SOFTWARE REPLACEMENT
Reload the System Software (OS) or Application Software on the
host side.
Does the printer still exhibit erratic operation?
Go to step 4 Problem solved
4
HOST/PRINTER INTERFACE CABLE REPLACEMENT
Replace the interface cable connecting the host to the printer.
Is the problem still present?
Go to step 5 Problem solved
5
Replace the MCU PWB (RRP 9.123)
Does the problem still appear?
Go to step 6 Problem solved
6
Replace the Controller PWB (RRP 9.129)
Does the printer still exhibit erratic operation?
Go to FIP 6.1
Electrical
Noise
Problem solved