Lexmark 4079 colorjet printer plus Service Manual - Page 87

Lexmark 4079 colorjet printer plus Manual

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Power Supply 007 1 Check the two power supply outputs with connector CNPOW plugged into the logic board and J4 unplugged from the controller board. Remove the controller board for access to the logic board connector. 0 a +5V +26V +24V BR R 0 Y W BI. V 1 234 56 7 0 00 0 00 0 CNPOW Use pin 1 as ground and check the following voltages with the connector plugged in: CNPOW pins 1-2 5 V dc pins 1-4 28 V dc pins 1-6 24 V dc J4 unplugged - Check the voltage on cable J4 from the power supply. pins 1 -5 (brown to yellow) 5 V pins 3 -5 (red to yellow) 5 V Are the voltages correct? Yes No 008 Turn off the printer. Make sure the controller card EPROM and memory SIMMS are installed and seated correctly. Turn on the printer. Does the printer complete POST? Yes No 0091 Go to Step 011 on page 2-68 Diagnostic Information 2-67

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Power
Supply
007
1
Check
the
two
power
supply
outputs
with
connector
CNPOW
plugged
into
the
logic
board
and
J4
unplugged
from
the
controller
board.
Remove
the
controller
board
for
access
to
the
logic
board
connector.
0
a
+5V
+26V
+24V
BR
R
0
Y
W
BI.
V
1
0
2
3
0
0
4
5
0
0
6
7
0 0
CNPOW
Use
pin
1
as
ground
and
check
the
following
voltages
with
the
connector
plugged
in:
CNPOW
pins
1-2
5
V
dc
pins
1-4
28
V
dc
pins
1-6
24
V
dc
J4
unplugged
—
Check
the
voltage
on
cable
J4
from
the
power
supply.
pins
1
-5
(brown
to
yellow)
5
V
pins
3
—5
(red
to
yellow)
5
V
Are
the
voltages
correct?
Yes
No
008
Turn
off
the
printer.
Make
sure
the
controller
card
EPROM
and
memory
SIMMS
are
installed
and
seated
correctly.
Turn
on
the
printer.
Does
the
printer
complete
POST?
Yes
No
0091
Go
to
Step
011
on
page
2-68
Diagnostic
Information
2-67