Ricoh FT7770 Service Manual page 4

PAPER FEED
1. Introduction
Feed Unit Mechanism
2.
FER Operation
3.
Paper Tray Drive Mechanism
4.
Friction Roller Reverse Mechanism
5.
Paper Volume Detection
6.
7. Guide Posts and Paper Size Detection
8. Tray Lock and Positioning
9. Paper Size Board
220/240-Volt Paper Size Sensor
10.
11. Tray Motor Circuit
12. Paper Tray Heaters
13. Tray Set Detection
VERTICAL TRANSPORT AND REGISTRATION
1. Introduction
Drive Mechanism
2.
Jam Check Timing
3.
PAPER TRANSPORT
Introduction
1.
Vacuum Fan
2.
FUSING
Introduction
1.
Pressure Mechanism
2.
Oil Supply
3.
4. Oil End Sensor
5. Drive Mechanism
6. Fusing Lamp Circuit
INVERTER
Introduction
1.
Operation
2.
3. Inverter Rollers
Inversion
4.
Junction Gate
5.
DUPLEX TRAY
Introduction
1.
2. Drive Mechanism
3. Fork Gate
Paper Positioning
4.
Bottom Plate Mechanism
5.
6. Duplex Paper Feed
7. Duplex Motor Circuit
TOP UNIT
Release Mechanism
1.
2. Drum Support
Circuit
2-61
2-62
2-63
2-64
2-65
2-66
2-67
2-68
2-69
2-70
2-71
2-72
2-73
2-74
2-76
2-78
2-79
2-80
2-81
2-82
2-83
2-84
2-85
2-86
2-88
2-89
2-91
2-92
2-93
2-94
2-96
2-96
2-97
2-98
2-99
2-100
2-101
2-102