4026-0XX

Operator Panel Service Check

1

FRU

Action

Operator

LEDs

Panel Assem-

Be sure the operator panel cable is properly

bly

seated in J5 on the controller board.

 

Run POST and check each LED for proper

 

operation.

 

If more than one LED does not light or an indi-

 

vidual LED stays on solid during POST, replace

 

the following FRUs one at a time in the order

 

shown:

 

Controller board

 

Operator panel

 

If all LEDs are very dim and operate erratically

 

during POST or all LEDs come on and stay on

 

solid during POST replace the following FRUs

 

one at a time in the order shown:

 

Operator panel assembly

 

Controller board

 

If none of the LEDs are on, be sure +5 V dc is

 

present at J1-2 on the controller board. If cor-

 

rect, replace the operator panel assembly. If

 

incorrect, replace the controller board.

 

If all the LEDs come on and remain on, replace

 

the following FRUs one at a time in the order

 

shown:

 

Operator Panel Assembly

 

Controller Board

 

Button Inoperative

 

Disconnect the operator panel cable at J5 on the

 

controller board. Check the continuity between

 

J5-5 and J5-6 on the cable as you press the but-

 

ton. The meter should read from approximately

 

10K ohms to approximately zero ohms when the

 

button is pressed.

 

If the continuity is incorrect, replace the operator

 

panel assembly. If correct, replace the following

 

FRUs one at a time in the order shown:

 

Operator Panel Assembly

 

Controller Board

 

 

Diagnostic Information 2-27

Page 49
Image 49
Lexmark 4026-0XX manual Operator Panel Service Check, Button is pressed

4026-0XX specifications

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