Lexmark X 850 Owners Manual

Diagnostic information2-123
7500-XXX
295.01 Size mismatch jam (no mix-size)
7 Check the sensor (ADF width APS 3) for connection.
Is the above sensor connected properly?Replace the 
sensor (ADF 
width APS 3). 
Go to “Sensor 
(ADF width APS 
3)” on 
page 4-186.Replace the 
connection.
8 Place an undamaged document in the ADF, and perform a 
ADF test.
Does the error remain?Replace the ADF 
controller card 
assembly. 
Go to “ADF 
controller card 
assembly 
removal” on 
page 4-167.Go to step 9.
9 Place an...

2-124MFP Service Manual 7500-XXX
295.02 Invalid combine size jam
Step Check Yes No
1 Check the document size.
Is the correct size document being inserted into the ADF?Go to step 2. Insert the proper 
size document into 
the ADF.
2 Check the document tray media guide position.
Are the document tray media guides set correctly?Go to step 3. Adjust the 
document tray 
media guides to 
the proper position.
3 Check the connection of each ADF controller card assembly 
connector.
Is each connector of ADF...

Diagnostic information2-125
7500-XXX
295.03 Too short size jam
8 Check the sensor (ADF width APS 3) for operation. 
Perform the sensor (ADF width APS 3) test.
Open the ADF left cover assembly.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch ADF width APS 3.
Operate the actuator of the sensor (ADF width APS 3).
Does the display on the operator panel change every time 
the sensing area of the above sensor is blocked?Go to step 10. Go to step 9.
9 Check the sensor (ADF...

2-126MFP Service Manual 7500-XXX
2 Check the sensor (sheet through) for operation. 
Perform the sensor (sheet through) test.
Open the ADF left cover assembly.
Remove the ADF rear cover. Go to “ADF rear cover 
removal” on page 4-165.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4. Touch Sheet through.
Does the display on the operator panel change every time 
the sensing area of the above sensor is blocked?Go to step 4. Go to step 3.
3 Check the sensor (sheet through) for...

Diagnostic information2-127
7500-XXX
295.04 Too long size jam
Step Check Yes No
1 Check the document size.
Is the correct size document being inserted into the ADF?Go to step 2. Insert the proper 
size document 
into the ADF.
2 Check the sensor (sheet through) for operation. 
Perform the sensor (sheet through) test.
Open the ADF left cover assembly.
Remove the ADF rear cover. Go to “ADF rear cover 
removal” on page 4-165.
1. Enter the Diagnostics Menu.
2. Touch SCANNER TESTS.
3. Touch Sensor Tests.
4....

2-128MFP Service Manual 7500-XXX
841.00 Image pipeline ASIC failure
842.00 Scanner communication failure
7 Place an undamaged document in the ADF, and perform a 
ADF test.
Does the error remain?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal” on 
page 4-128.Problem solved.
Step Check Yes No
1 Perform a POR. 
Does the error occur when the power is turned off/on?Go to step 2. Perform several 
print tests. 
If the problem 
remains, go to 
step 2.
2 Turn the printer off for 60 seconds....

Diagnostic information2-129
7500-XXX
842.01 Scanner communication failure
842.02 Scanner communication failure
Step Check Yes No
1 Check the scanner interface cable assembly connection 
between the RIP card assembly and the scanner unit 
assembly.
Is the scanner interface cable assembly connected properly?Go to step 2. Replace the 
connection.
2 Check all connections of the scanner controller card assembly.
Are the connections of the scanner controller card assembly 
connected properly?Go to step 3....

2-130MFP Service Manual 7500-XXX
842.03 Scanner communication failure
842.04 Scanner communication failure
4 Perform a POR.
Does the error remain when the power is turned off/on again?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal” on 
page 4-128.Problem solved.
Step Check Yes No
1 Check the scanner interface cable assembly connection 
between the RIP card assembly and the scanner unit 
assembly.
Is the scanner interface cable assembly connected properly?Go to step 2. Replace the...

Diagnostic information2-131
7500-XXX
842.10 Scanner unit assembly - ADF communication failure
842.11 Scanner communication failure (by scanner)
3 Perform a POR.
Does the error remain when the power is turned off/on?Replace the 
scanner 
controller card 
assembly. 
Go to “Scanner 
controller card 
assembly 
removal” on 
page 4-143.
Go to step 4.Problem solved.
4 Perform a POR.
Does the error remain when the power is turned off/on again?Replace the RIP 
card assembly. 
Go to “RIP card 
assembly 
removal”...

2-132MFP Service Manual 7500-XXX
842.12 Scanner unit assembly communication failure
2 Check all connections of the ADF controller card assembly.
Are the connections of the ADF controller card assembly 
connected properly?Go to step 3. Replace all 
connections.
3 Perform a POR.
Does the error remain when the power is turned off/on?Replace the 
ADF controller 
card assembly. 
Go to “ADF 
controller card 
assembly 
removal” on 
page 4-167.Problem solved.
4 Perform a POR.
Does the error remain when the power...