NEC Super Script 4400 Maintenance Manual page 182

7 .5.5 Paper Size Sensor (PSU)
Tools
Phillips Screwdriver
Disassembly Procedures
1. Remove the side cover (L). (See the item 7.1.2. )
2. Remove the power supply unit. (See the item 7.2.5.)
3. Remove the set screw ST3 6 (2 pcs.) of the paper cassette guide (L) assembly.
4. Pull the paper cassette guide toward you.
5. Remove the connector for the paper size sensor.
6. Remove the paper cassette guide (L) assembly from the frame.
7. Remove the set screw BT3 8 (2 pcs.) of paper size sensor from the cassette guide (L).
Assembly Procedures
1. Install a new paper size sensor (PSU) to the paper cassette guide (R).
2. After the above, follow exactly the reverse order of disassembling procedures.
Cassette Guide
Paper Size Sensor
Replacement Procedures for Maintenance Parts 173