Canon imageRUNNER ADVANCE C3330 Series Service Manual page 120

■ Fixing Unit Life Detection
Purpose
To detect the life of the Fixing Unit in order to prevent fixing errors due to the Fixing Unit having reached the end of life
This machine has a counter in the DC Controller to determine the life of the Fixing Unit.
The life of the Fixing Unit is determined by the following 3 conditions:
1. Total drive time
Displayed when the sum of the total drive times reaches 2,150 hours.
2. Number of sheets fed
Displayed when 150,000 sheets have been fed
3. Total drive time + Number of sheets fed
Displayed when either of above conditions 1 or 2 is first detected
When these conditions reach certain limits "The fixing assembly needs to be replaced." is displayed on the Control Panel
status line.
Related Service Mode
• ON/OFF Fixing Unit replacement message (Lv.2) :
COPIER > OPTION > DSPLY-SW > FXMSG-SW
• To set the threshold value to display the life of Fixing Film. (Lv.2) :
COPIER> OPTION> FNC-SW> FXWRNLVL
The life of the Fixing Unit is detected when FXMSG-SW and FXWRNLVL is 1.
As the default value of FXWRNLVL is 0, the life is not detected at factory default.
■ Detection of whether the Fixing Unit is new
The Fixing Fuse PCB (UN31) detects whether the Fixing Unit is new.
• Fixing Fuse PCB (UN31) Fuse present: Fixing Unit is new
• Fixing Fuse PCB (UN31) Fuse not present: Fixing Unit is being used
Installing a new Fixing Unit in the machine blows the fuse.
When a new unit is detected, the part counter (COPIER > COUNTER > DRBL-1 > FX-UNIT) is cleared.
When a new Fixing Unit is installed after an error occurs and it is recognized as new, the error is automatically cleared.
When the part counter of the Fixing Unit (COPIER > COUNTER > DRBL-1 > FX-UNIT) is cleared, the Fixing Unit replacement
completion alarm (alarm code 35-0076) is generated.
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2. Technology