Epson ActionLaser 1600, Service Manual

Page: 74 / 181

Principles of Operation
Table 2-1. Gears and Rollers
No.
Gear
Roller Name No.
Gear
Teeth
Teeth
Roller Name
1 18 Main Motor (Ml)
15 36 Upper Fusing Roller
2 23/38/126
16 54
3
29
17 15 Face-Down Exit Roller
4 14/32
18
39/48
5 43
P/C Drum 19 15
Face-Up Exit Roller
6 30
P/C Drum 20 24/32
7 47
21* 14/24
8
29/41
22* 18
9 26
23*
18
10 23 Sleeve Roller
24* 18
11 16/40
25*
16
12 46/69 Paper Take-Up Roller
26* 16 Paper Take-up Roller
13 23
Transport Roller 27* 28
Transport Roller
14 16/75
28 14
Image Transfer Roller
*Optional lower paper cassette
Figure 2-17 shows the main motor drive circuit. The main motor (Ml) is a
four-phase stepping motor. This motor is controlled by the CPU (IC1A) on the
engine controller board (PWB-A). The power supply board (PWB-E) has a stepping
motor driver IC. This IC drives the main motor (M1)
The main motor (Ml) is stopped when the CPU (IC1A)
board (PWB-A) outputs TdA and TdB signals.
with a constant current.
on the engine controller
Figure 2-17. Main Motor Drive Circuit
2-16
EPSON ActionLaser 1600 Service Manual