Ricoh G081, Service Manual

Page: 195 / 272

PRINT PROCESS
SM 6-33 G081/G092
Detailed
Des
cription
s
The IH power control signals IHPOWER and IHON are used to provide the IH unit
[
/
] with electric power. The on/off timing of IHON is adjusted in accordance with
the zero cross detection signal NZCROSS. The table lists the pin locations.(Refer
to illustration on pg 6-29.)
Pin No. In/Out Signal
Name
CN32 CN2503 CN32 CN2503
Remarks
IHPOWER 7 3 — —
Closes the +24V circuit
IHON 6 4 Out In
Provides the IH unit with
electricity
CN32: On engine control board
CN2503: On power supply board
T indicates the target fusing temperature. In the 600-dpi printing mode, T is about
175°C. The fusing belt temperature is different for the 1200-dpi printing mode,
thick-paper printing mode and transparency-printing mode. When the printer is idle,
IHPOWER is off, and the fusing belt is not heated.