Table of Contents
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Step
Actions and questions
7
System board—Measure the voltage at connector
JOPP1-2 on the
"System board" on page
voltage measures approximately +5 V dc.
Is the voltage correct?
8
Operator panel cable (operator panel connection)—
Make sure that the operator panel cable is seated
correctly in the connector on the operator panel board.
Is the cable seated correctly?
9
Operator panel cable—Check continuity of the
operator panel cable.
Is there continuity?
10
System board—A poor ground connection between
pin JOPP1-4 on the operator panel board connector
can cause this symptom. Check for continuity between
pin JOPP1-4 and ground on the board. Go to
board" on page
Is there continuity?
11
Operator panel cable—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 five beeps?
13
Voltage checks at system board connector JOPP1—
Go to
"System board" on page
voltages on connector JOPP1 as shown:
Connector
Voltage (display
pin
static)
JOPP1-1
+5 V dc
JOPP1-2
+5 V dc
JOPP1-3
+5 V dc
JOPP1-4
Ground
JOPP1-5
+5 V dc
Are the voltages correct?
14
Operator panel cable—Check continuity of the
operator panel cable.
Is there continuity?
5-8.
5-8. Check the
Voltage (display active—LCD
Test running)
Voltage varies 1.0 to 2.0 V dc
+5 V dc
Voltage varies 1.0 to 2.4 V dc
Ground
+5 V dc
Yes
Replace the
5-8. The
operator panel
assembly. See
"Operator panel
assembly
removal" on
page
4-68.
Go to step 9
Replace the
system board.
See
"System
board removal"
on page
4-89.
Go to step 11
"System
Replace the
operator panel
assembly. See
"Operator panel
assembly
removal" on
page
4-68.
Go to step 13
Replace the
operator panel
assembly. See
"Operator panel
assembly
removal" on
page
4-68.
Replace the
operator panel
assembly. See
"Operator panel
assembly
removal" on
page
4-68.
5061
No
Go to step 8
Seat the cable
correctly.
Go to
"Operator
panel assembly
removal" on
page
4-68, and
replace the
operator panel
cable.
Replace the
system board.
See
"System
board removal"
on page
4-89.
Go to
"Operator
panel assembly
removal" on
page 4-68
and
replace the
operator panel
cable.
Contact your next
level of support.
Go to step 14
Go to
"Operator
panel assembly
removal" on
page
4-68, and
replace the
operator panel
cable.
2-89
Diagnostic information
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