Canon CP660 Service Manual page 60

CHAPTER 2 BASIC OPERATION
Inputs to and Outputs from the DC Controller PCB (10/10)
Printer unit power
supply switch*
SW1
Fixing assembly error
+24VB
Relay
RL101
Upper
thermal
TPU
Upper fixing heater
Upper fixing roller surface
temperature detection
Lower thermal
switch
TPL
Lower fixing roller surface
temperature detection
*
When installing the reader unit, the printer unit power switch is turned on and blocked with a face plate;
as such, it remains on at all times.
2-12
COPYRIGHT © 1999 CANON INC.
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J107 -12
Power supply
J106-3
Power supply
control IC
J107-10
detection circuit
JP1
J106-4
J107-1
Fixing heater
safety circuit
Fixing heater
drive circuit
Fixing
assembly
Upper
HU
thermistor
Lower fixing heater
HL
Lower thermistor
JP2
Figure 2-112
J216 -1
DC controller PCB
+24VB
J217-4
POFF
When the power switch is on, '0'.
-2 -5
PCONT
When '0', the power turns on.
J216-3
FXSTS
Fixing heater status detection signal
-11 -2
FXSTS
J217-3
When a 100-V power supply is mounted, '1'.
ACTYP
When a 200-V power supply is mounted, '0'.
-1 -6
J216-12
-4 -9
FXRON
When '1', the relay turns on.
When pulses are generated,
-5 -8
FXENB
the upper/lower heater may be
supplied with power.
-2 -11
-6 -7
FXUON
When '1', the upper fixing heater turns on.
-7 -6
FXUONS
When '1', the sub drive circuit turns on.
-8 -5
FXLON
When '1', the lower fixing heater turns on.
-9 -4
FXLONS
When '1', the sub drive circuit turns on.
J222-1
FXTHU
If the temperature of the upper fixing
-2
roll increases, the voltage decreases.
-3
FXTHL When the temperature of the lower fixing
-4 roller increases, the voltage decreases.
-5
FXTYP
When a 100-V fixing assembly is mounted, '1'.
-6
When a 200-V fixing assembly is mounted, '0'.
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)