Gestetner G060, Service Manual

Page: 251 / 1106

LASER EXPOSURE
SM 6-21 G060
Det
a
iled
De
s
c
ri
ptions
6.3.5 LD SAFETY SWITCH
PSU
B C U
LDB (K)
C N 4 0 1 - 4 8 ( K )
C N 4 0 1 - 4 9 ( K )
E - M A C
LDB (Y)
C N 4 0 1 - 4 8 ( Y )
C N 4 0 1 - 4 9 ( Y )
E - M A C
LDB (M)
C N 4 0 1 - 4 8 ( M )
C N 4 0 1 - 4 9 ( M )
E - M A C
LDB (C)
C N 4 0 1 - 4 8 ( C )
C N 4 0 1 - 4 9 ( C )
E - M A C
C N 2 2 1 - 3
C N 2 2 1 - 2
C N 2 2 2 - 3
C N 2 2 2 - 2
C N 2 2 3 - 3
C N 2 2 3 - 2
C N 2 2 4 - 3
C N 2 2 4 - 2
C N 1 0 1 - 1 0 L D 5 V C N 3 5 0 - 6
R E L A Y
C N 3 6 1 - 2
F r o n t D o o r a n d
L e f t D o o r S W
C N 3 6 1 - 1
+ 2 4 V + 5 V
R i g h t D o o r S W
A relay on the PSU ensures technician
and user safety and prevents the laser
beam from inadvertently switching on
during servicing. This relay turns off
when the front cover, upper left cover, or
right cover is opened, and cuts the
power (+5V) supplied to the LD board
for each color through the BCU.
Two safety switches are used to turn the
relay off. One switch is used for the front
cover and upper left cover. This safety
switch is off when either the front cover
or upper left cover is opened. Another
safety switch is used for the right cover.
•
E-MAC: Enhanced Modulation ASIC
on CMOS
LDB: LD Drive Board
(included in the LD Unit)
Front and Left Door Switch
Micro switch [A] on the PSU is activated
or deactivated by the actuator [B] when
closing or opening the front and left
doors as shown.
G060D802.WMF
[A]
[B]