2-132 MFP 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 is turned off/on?
Replace the
scanner
controller card
assembly.
Go to “Scanner
controller card
assembly
removal” on
page 4-143.
Problem solved.
Step Check Yes No
1 Check all connections of the scanner controller card
assembly.
Are the connections of the scanner controller card assembly
connected properly?
Go to step 2. Replace all
connections.
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 is turned off/on?
Replace the
scanner
controller card
assembly.
Go to “Scanner
controller card
assembly
removal” on
page 4-143.
Problem solved.
Step Check Yes No
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