Lexmark X543 Service Manual

Locations5-15
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HVPS 

5-16Service Manual 7525xxxLexmark confidential until announce
Connectors
HVPS board
Connector Pin no. Signal
Connection from controller board 1 M-Drpwm
2 K-Dr pwm
3C-Drpwm
4 CMY-Chrgpwm
5 Y-Drpwm
6 K-Chrgpwm
7 CMY-Srvo_Out
8I-Txpwm
9CMY-Txpwm
10 I-Sr vo_Out
11 K-Srvo_Out
12 K-Txpw m
13 +24V
14 +24VRtn
15 VREF Buffered
16 +24VRtn
Contacts to machine 1 I-Transfer
2 CMY-Transfer
3K-Transfer
4 K-Charge
5 CMY-Charge
6 K-DR Blade
7 M-DR Blade
8 C-DR Blade
9 Y-DR Blade
10 Ground 

Locations5-17
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LVPS 

5-18Service Manual 7525xxxLexmark confidential until announce
Connectors
LVPS board
Connector Pin no. Signal
CN1 1 +5V
2 Ground
3 +5V
4 Ground
5+5V
6 Ground
7 +25V
8 Ground
9 +25V
10 Ground
11 +25V
12 Ground
13 Relay Drive
14 ZC  Out
15 Heat On
16 NC
CN2 1 AC phase input
2 AC neutral input
CN3 1 AC Out
29 AC load phase 

Locations5-19
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Toner meter card
Toner meter card connectors
Toner meter card
Connector Pin no. Signal
From JCTM1 connector on the 
controller board1+5 V_SW
2 Car t_Meter_C_IN
3 Cart_Meter_M_IN
4 Car t_Meter_Y_IN
5 Car t_Meter_K_IN
6 Ground 

5-20Service Manual 7525xxxLexmark confidential until announce
Wireless card
Connectors
Wireless card
Connector Pin no. Signal
From JUSBW1 on controller 1 Ground
2 USB_HST_VP
3 USB_HST_VM
4 Ground
5+5V
6 Wireless_POR 

Preventive maintenance6-1
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6.  Preventive maintenance
This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help 
prevent problems and maintain optimum performance.
Safety inspection guide
The purpose of this inspection guide is to aid you in identifying unsafe conditions.
If any unsafe conditions exist, find out how serious the hazard could be and if you can continue before you 
correct the hazard.
Check the...

6-2Ser vice Manual 7525xxxLexmark confidential until announce 

Pa r ts  ca ta l og7-1
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7.  Parts catalog
How to use this parts catalog
The following legend is used in the parts catalog:
Asm-index: Identifies the assembly and the item in the diagram. For example, 3-1 indicates Assembly 3 
and item number 1 in the table.
Par t number: Identifies the unique number that identifies this FRU.
Units/mach: Refers to the number of units actually used in the base machine or product.
Units/option: Refers to the number of units in a...

7-2Ser vice Manual 7525xxxLexmark confidential until announce
Assembly 1:  Covers
7
11
9
8
1
2
3
4
5
6
10