Sub Logic Board Removal - Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual

4227-300
11. Remove the right side frame.
Note: The upper feed roller bearing should stay in the side frame.
The lower pinch roller bushing is free on the end of the shaft.
To reassemble
1. Install the side frame first, and then remove the paper
separator. Be sure the lower pinch roller spring is above the
bushing.
2. Remove the screw from the right end of the paper separator.
3. Install the left end of the paper separator first, and then bend
the right side frame slightly to get the right end installed.
4. Reinstall the separator screw through the hole above the slider
cam.
5. Set the printhead to platen gap.

Sub logic board removal

1. Remove the top cover. See
2. Disconnect the power connector and the signal connector from
the sub logic board.
3. Remove the three screws.
4. Disconnect the printhead cables and remove the sub logic
board.
To reinstall
For ease of reassembly, remove the flexible signal cable from the
main logic board and connect it to the sub logic board before you
reinstall the sub logic board. Remember to reconnect the ground
lead to the bottom mounting screw.
"Top cover removal" on page
Repair information
4-5.
4-37