Figure 2-17. Main Motor Drive Circuit - Epson H5200 - TM B/W Thermal Line Service Manual

No. of Gear
No.
Teeth
18
2 2 8 / 3 8 / 1 2 6 I
3 24
4 14139
43
5
6 30
7 47
8 29/41
9 26
10 23
11 1 6/40
12
13 23
14 l&75
*Option (lower paper cassette)
Figure 2-17 shows the main motor drive circuit. The main motor (MI) is a four-phase stepping
motor. This motor is controlled by the CPU (ICIA) 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 (Ml)
with a co"rkant current. The main mokr 7M1) is stoppd when the CPU (ICIA) on the engine
controller board (PWB-A) outputs TdA and TdB signals.
Engine Controller
Board PWB-A
CN8A
Rev. A
Table 2-1. Gears and Rollers
Roller Name
Main Motor (Ml )
P/C Drum
P/C Drum
Sleeve Roller
Paper Take-Up Roller
Roller
Power Supply Board
CN3E
4 8
A
3 9
B
2
10
1 11

Figure 2-17. Main Motor Drive Circuit

No. of Gear
No.
Teeth
15 36 Upper Fusing Roller
54
Face-Down Exit Roller
17 15
18 39/48
19 15 Face-Up
20 24/32
21* 14/24
22* 18
23* 18
24* 18
25* 16
Paper Take-up Roller
26* 16
27' 28 Transport Roller
Image Transfer Roller
28 14
2
3
B
4
5
6
Operating Principfas
Roller Name
Exit Roller
1
2-9