4026-0XX

Low Voltage Power Supply Service Check

Note: The controller board, HVPS and printhead assembly receive power from the LVPS through the engine board.

If the machine is dead, be sure the controller board is correctly seated in the engine board connector.

Check and reseat all cables.

Dead Printer

 

FRU

Action

 

 

 

1

Line Voltage

Check the AC line voltage. The voltages should

 

 

be within the following limits:

 

 

100 V ac (90 V ac - 110 V ac) Japan

 

 

120 V ac (108 V ac - 132 V ac) U.S.

 

 

220/230 V ac (207 V ac - 253 V ac) W.T.

 

 

 

2

LVPS

The voltage measures approximately +5 V dc

 

 

between CN7-4 and ground on the engine

 

 

board. If incorrect, disconnect CN7 on the

 

 

engine board and measure the voltage between

 

 

CN7-4 (+5 V dc) and CN7-3 (+5 V ground). The

 

 

reading should measure approximately +5 V dc.

 

 

If +5 V dc is not present, unplug the printer line

 

 

cord and check fuse F1. If the fuse is open,

 

 

replace the fuse. If the fuse is not open, replace

 

 

the LVPS.

 

 

 

3

Engine Board

If +5 V dc is present when CN7 is disconnected

 

 

then disconnect CN2, CN4, CN5, CN9 and

 

 

CN10 from the engine board. Also disconnect

 

 

the controller board and remove the ROM SIMM

 

 

and any optional memory SIMMs. Reconnect

 

 

CN7 and check for +5 V dc. If incorrect, replace

 

 

the engine board.

 

 

 

4

Controller

Reinstall the controller board. Check for +5 V dc

 

Board

at CN7-4. If incorrect, replace the controller

 

 

board.

 

 

 

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Lexmark 4026-0XX manual Low Voltage Power Supply Service Check, Dead Printer

4026-0XX specifications

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