Canon np6330 서비스 매뉴얼
III. ERROR DETECTION CIRCUIT
A. Outline
The copier’s power switch (SW1) is equipped with a relay which turns on in response
to the following to cut off the AC power to the DC power supply PCB:
q
Error in the scanning lamp
w
Error in the fixing heater
Reference:
The relay will also turn on to turn off the power switch when the copier is not
operated for a specific period of time set in user mode.
operated for a specific period of time set in user mode.
Figure 7-301
7-6
CHAPTER 7 CONTROLS AND EXTERNALS
COPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Lamp
regulator
regulator
FU1
Lamp ON (LMPON)
Gate
array
(IC115)
array
(IC115)
I/O
port
(IC109)
port
(IC109)
LA1
TSW1
SSR
Master
CPU
(IC116)
CPU
(IC116)
+5V
Comparator
circuit
circuit
SW1
+24VB
H1
TH1
H2
Fixing heater
temperature
error
temperature
error
Fixing main heater ON detection (MSSRD)
Fixing sub heater ON detection (SSSRD)
Fixing main heater ON (MHRD)
Fixing sub heater ON (SHRD)
Power switch OFF (PWOFF*)
Lamp ON detection (LDT)
DC controller PCB
Download Service Manual And Resetter Printer at http://printer1.blogspot.com