Lexmark X 850 Owners Manual

Repair information4-123
7500-XXX
9.Remove the AC drive card assembly (B).
Note:  Before reinstalling, ensure that all electrical connections are properly connected.
P526
P6
P8 (Not used)
T11 (Black wire)T12 (White wire)
P2 (Not used)
P1 P4 P7Connectors
Harness clampB
Not
used
White wire
Black wire
Rear 

4-124MFP Service Manual 7500-XXX
AC power input socket assembly removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear lower cover. See “Rear lower cover removal” on page 4-12.
4.Remove the top cover assembly. See “Top cover assembly removal” on page 4-5.
5.Remove the right upper cover. See “Right upper cover removal” on page 4-9.
6.Remove the three screws securing the AC power...

Repair information4-125
7500-XXX
AC power input socket removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear lower cover. See “Rear lower cover removal” on page 4-12.
4.Remove the three screws securing the bracket (A). 
5.Disconnect the two connectors to the AC power input socket (B). 
6.Remove the two screws securing the AC power input socket (B) to the bracket (A).
7.Remove...

4-126MFP Service Manual 7500-XXX
Finisher AC output removal
1.Remove the RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear lower cover. See “Rear lower cover removal” on page 4-12.
4.Remove the printer engine card assembly. See “Printer engine card assembly removal” on 
page 4-117.
5.Remove the three screws securing the bracket (A). 
6.Disconnect the three connectors to the finisher AC output (B)....

Repair information4-127
7500-XXX
RIP card chassis bracket removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Disconnect five connections from the RIP card assembly (A).
3.Remove the two screws securing the RIP card chassis bracket (B) to the frame.
4.Slide the RIP card chassis bracket (B) to the left and out of the frame.
Warning:  Do not drop the RIP card chassis bracket, or damage will occur.
B
A Connectors
Connectors
Connector 

4-128MFP Service Manual 7500-XXX
RIP card assembly removal
Warning:  In the event of replacement of any one of the following components:
•Operator panel assembly (universal)
•Operator panel controller card assembly
•RIP card assembly
•Interconnect card assembly
Only replace one component at a time. Replace the required component, and perform a POR before replacing a 
second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never 
replace two or more of...

Repair information4-129
7500-XXX
Fax interface card assembly removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Disconnect the connection from the fax interface card assembly (A).
3.Remove the two screws securing the fax interface card assembly (A) to the side of the RIP card chassis 
bracket (B).
4.Remove the fax interface card assembly (A).
A
B
Connector 

4-130MFP Service Manual 7500-XXX
Hard drive removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the RIP card chassis bracket. See “RIP card chassis bracket removal” on page 4-127.
3.Remove the RIP card assembly. See “RIP card assembly removal” on page 4-128.
Warning:  Do not drop the RIP card chassis bracket, or damage will occur.
4.Remove the two connectors from the hard drive (A).
5.Remove the two screws securing the hard drive (A) to the side of the RIP...

Repair information4-131
7500-XXX
Interconnect card assembly removal
Warning:  In the event of replacement of any one of the following components:
•Operator panel assembly (universal)
•Operator panel controller card assembly
•RIP card assembly
•Interconnect card assembly
Only replace one component at a time. Replace the required component, and perform a POR before replacing a 
second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never 
replace two or...

4-132MFP Service Manual 7500-XXX
Scanner removals
Right
Front
Left
Rear