Lexmark 13P0150 - C 750dtn Color Laser Printer Service Manual page 99

Step Action and Questions
10
RIP Board - A poor ground connection between pin 4 on the
Operator Panel board connector can cause this symptom.
Check for continuity between Pin J1-4 and ground on the
board. Go to "RIP Board" on page
Is there continuity?
11
Operator Panel Cable Continuity - Check continuity of the
Operator Panel Cable.
Is there continuity?
12
Operator Panel Assembly - Does the Operator Panel
display all diamonds, with the Power On/Status LED on and
5 Beeps?
13
Voltage Checks at RIP Connector J1 - Go to
on page 5-11. Check the voltages on RIP Connector J1 as
shown:
J1 Pin No Voltage (Display Static) Voltage (Display Active)
1 +5 V dc
2 +5 V dc
3 +5 V dc
4 Ground
5 +5 V dc
Are the voltages correct?
14
Operator Panel Cable Continuity - Check continuity of the
Operator Panel Cable.
Is there continuity?
5060-XXX
5-11.
"RIP Board"
(LCD Test Running)
Voltage varies1.0 to
2.0 V dc
+5 V dc
Voltage varies 1.0 to
2.4 V dc
Ground
+5 V dc
Yes No
Go to step 11 Replace the
"RIP Board"
on page 4-11
Replace the Go to the
"Operator "Operator
Panel" on Panel" on
page 4-25 page 4-25
and replace
the operator
panel cable
Go to step 13 Call your next
level support
Replace the Go to step 14
"Operator
Panel" on
page 4-25
Replace the Go to the
"Operator "Operator
Panel" on Panel" on
page 4-25 page 4-25
and replace
the operator
panel cable
Diagnostic Information
2-79