Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual page 72

Operating Principles
2.1.3.7 Fan Motor and Chuta Fan Motor Control
The
fan motor rotates at all ti"kws after the
printing. When printing ends, the fan motor slows down. 'l'he high voltage supply board (HVPS)
receives FAN CONTROL signals from the engine contdler board (MC PWB) during pMtin& and
the high voltage supply board (HVPS) sends CHUTE FAN ON signal to chute fan and FAN FASI'
The fan rotates faster while FAN FAST ON signal receive. The chute fan rotates while CHUTE FAN
ON signal receive.
The fan output FAN ALARM signal, while it is locked.
Engine Controller
24 VDC
FAN CONTROL
FAN AIARM
Figure 2-32. Fan and Chute Fan Control Circuit
2-20
power is on. Ihe b motor rotates faster
High Voltage *@y
CHUTE FAN ON ;
-o-. -x--
. . . . . :: : :
-- *
. . . . . . . . . . . . . . . . . . . . . 1
Front Frame
Assembly
Chute
o M
. . . . . . . . . . . . . . .
Fan
0 M
during
Fan
Rev. A