NEC Super Script 4400 Maintenance Manual page 141

7 .2.1 MCTL Circut Card.
Tools
Phillips Screwdriver #1, #2
Disassembly Procedures
1. Remove the side cover (L). (See the item 7.1.2)
2. Remove the top cover. (See the item 7.1.4)
3. Remove the set screw ST3 6 (3 pcs.) of shield cover 'A'.
4. Remove the shield cover 'A'.
5. Remove the set screw ST3 6 (3 pcs.) of shield (upper).
6. Remove the shield (upper).
7. Remove the set screw ST3 6 (1 pc.) of shield cover 'B'.
8. Disconnect all the harness connectors (5 pcs.) connected with the MCTL.
9. Remove the set screw ST3 6 (4 pcs.) of MCTL.
10. Remove the MCTL.
Assembly Procedures
1. Assemble a new MCTL Circut Card.
2. After above assembling, follow the reverse order of above disassembling for set-up.
3. Upon completion of above set-up, connect the power supply cable.
4. Turn on the power switch of the printer.
5. Execute the RAM clear in Service Mode.
6. Input content of RAM before replacement in Service Mode. (See the item 6.5.2.)
7. Confirm the operation and print quality by implementing the test print.
Caution!
Read the information of internal counter prior to replacing the MCTL Circut Card.
Use proper grounding procedures to prevent electrostatic discharge when removing or installing the MCTL
circut board.
Ensure that the firmware revision number on the new card is current if not ensure that you flash update the
firmware for properoperation of the printer.
132 SuperScript 4400 — Maintenance Guide