Image Blank Or Distorted (Flatbed) - Lexmark 6500E Service Manual

Image blank or distorted (flatbed)

Action
Step 1
Inspect the flatbed cables for poor connection to the flatbed scanner
module. Also check for damage to the cable near the scanner module
connector due to improper installation or fractures from multiple scan
cycles.
Is the cable damaged?
Step 2
Check the following voltages on J6 of the Engine Board: of the Engine
Board:
•
J6-1 +24V
•
J6-3 +24V
•
J6-6 GND
•
J6-9 GND
•
J6-12 GND
•
J6-15 GND
•
J6-16 GND
• J6-17 +3.3V
• J6-18 +3.3V
Do the measurements on the engine board match the above values?
Step 3
Check the following voltages on J24 of the Controller Board:
•
J24-1 GND
•
J24-3 +24V
•
J24-4 +24V
•
J24-5 GND
•
J24-13 GND
•
J24-15 GND
•
J24-18 GND
•
J24-21 GND
•
J24-24 GND
•
J24-27 GND
•
J24-30 GND
Do the measurements on the controller board match the above values?
Yes
Replace the flatbed
scanner module cables.
See
cables removal" on
page
Go to step 3.
Replace the flatbed
scanner module. See
"Flatbed scanner
module removal" on
page
Diagnostic information
27
No
Go to step 2.
"Flatbed scanner
113.
Replace the engine
board. See
board removal" on
page 120.
Replace the controller
board. See
""Controller board
removal" on page
103. 109.
4036
"Engine