Protective Functions - Canon imagePRESS C1 P Service Manual

User mode: System management settings>Device management settings>Refresh the fixing roller (*)
- Setting the refresh level of the fixing roller
Service mode: COPIER>OPTION>USER>FX-CLNLV (level 2)
User mode: System management settings>Device management settings>Automatic refresh level of the fixing roller (*)
Setting range: -5 (30 sec) to +5 (330 sec) [Default: 0 (180 sec)]
* By selecting COPIER>OPTION>BODY>IMGC-ADJ, and set 'IMGC-ADJ' as '1', items will be displayed on the 'Device management Setting' screen.

9.6 Protective Functions

9.6.1 Protective Circuit
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
[7]
Thermo SW
Outside
heating roller
Thermo SW
Fixing roller
Thermo SW
Fixing belt
(inlet roller)
[6]
AC relay
Protection methods
[1] CPU monitor block
[2] Thermistor overheating detection block
[3] Triac short detection block
[4] Heater simultaneous activation prevention
block
[5] Outside heating roller HP detection
[6] AC relay
[7] Thermo switch
DC controller PCB
CPU
Triac control
Triac control
Triac control
Triac control
AC driver PCB
Functions
Monitors the CPU's erratic behaviors
Detects the overheating of the heater.
Detects the triac short and malfunction of transistor for turning ON/OFF the heater.
Protects in case CPU behaves erratically and attempts to turn on all heaters simultaneously.
Prevents the damage caused by contacting the outside heating roller with the fixing roller while the fixing
motor stops.
Shut off the AC line in case of the triac short.
Shut off the AC line in case of the triac short or AC relay fault.
Fixing motor lock signal
Outside heating HP sensor
Thermistor
overheating error signal
Outside heating (main)
Outside heating (sub)
[2]
Thermistor
Fixing (sub)
overheating
Fixing (main)
detection
Belt (sub)
Outside heater triac state signal
Outside main triac state signal
Outside sub triac state signal
Belt heater triac state signal
Outside heater ON
Fixing main heater ON
Gate
Fixing sub heater ON
Belt heater ON
CPU reset
To CPU
[9]
Hardware timer
F-9-30
[5]
Outside heating roller HP detection
To I/O
Thermistor fault detection
[3] Triac short detection
Outside heating Tr short detection
Fixing main Tr short detection
Fixing sub Tr short detection
Belt Tr short detection
[1] CPU monitor circuit
[4]
Outside heater ON
4-heater
simultaneous
Fixing main heater ON
activation
prevention
Fixing sub heater ON
[8]
Triac
deactivation
Belt heater ON
Relay control
Chapter 9
0012-0992
ASIC
9-29