NEC Super Script 4400 Maintenance Manual page 168

7 .4.6 Transfer Solenoid (TRSOL)
Tools
Phillips Screwdriver #1, #2
Slotted Screwdriver #1
Disassembly Procedures
1. Remove the side cover (R). (See the item 7.1.3.)
2. Remove the IOD2 Circut Card. (See the item 7.2.3.)
3. Remove the main gear unit. (See the item 7.3.1.)
4. Remove the set screw ST3 6 (2 pcs.) of tension solenoid.
5. Remove the tension solenoid.
Assembly Procedures
1. Install a new tension solenoid.
2. After the above , follow exactly the reverse order of disassembling procedures.
Replacement Procedures for Maintenance Parts 159