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2-83 4059 Service Manual
4059-XXX
4 Output Expander Control
Board Level 1
Check the voltages at connector J4.
Go to “Output Expander Control
Board - Level 1 Stepper Motor” on
page 5-22.
Printer idle
J4-1 +21 V dc to +24 V dc
J4-2 +21 V dc to +24 V dc
J4-3 +21 V dc to +24 V dc
J4-4 +21 V dc to +24 V dc
Printer Feeding Paper
J4-1 Approximately +16 V dc
J4-2 Approximately +16 V dc
J4-3 Approximately +16 V dc
J4-4 Approximately +16 V dc
The voltage drops to approximately
+16 V dc as the output expander bin
stepper motor turns on and a sheet
of paper is fed through the redrive
into the output expander assembly. If
any of the voltages fail to change,
replace the output expander option
board. If that does not correct the
problem, replace the output
expander mechanical linkage
assembly.
FRU Action