Canon imageRUNNER 2525 Series, Service Manual, Page: 194 / 402

1. Clear the DC controller settings and counters.
Enter the service mode, and Then select the following:
CLEAR > ENGINE > ENGINE BKRAMCLK (Clearing of the RAM on the DC controller PCB)
2. Turn OFF and then ON the main power switch. (Turning OFF/ON the main power switch clears the RAM.)
3. If uploading of backup data fails before replacement due to the damage to the DC controller PCB, enter the values
of service mode items recorded on the service label. Since the values recorded on the service label may be outdated,
check the service mode item list (#SERVICE DATA LIST) printed out in advance, and then enter the latest values.
4. Turn OFF and then ON the main power switch. (Turning OFF/ON the main power switch allows the values entered
for the service mode items to take effect.)
■ Action to Take after Replacing the RAM
CAUTION:
The ADRAM is powered from the secondary battery unit to back up the image memory even after the main power switch
is turned OFF and the power plug is removed from the outlet.
If the SW3 on the main controller PCB is pressed with the image backed up, the entire data stored in the memory is cleared.
Be sure to output the data stored in the memory before pressing the SW3.
Laser Exposure System
■ Action to Take after Replacing the Laser Scanner Unit
When replacing the Laser Unit, enter the value obtained by adding 1,000 to the number shown on the label affixed to the side of
the newly replaced Laser Unit in the corresponding service mode as shown below.
(Examples: If the number on the service label is 3, enter 1,003. If the number on the service label is -1, enter 999.)
145 146 147 136 148 149 150
SW No.
-67 -5 -4 -5 0 0 0
• PRINT > Bitswitch > 136 Laser horizontal scanning direction write position adjustment(A)
• PRINT > Bitswitch > 145 Laser horizontal scanning direction magnification ratio adjustment(A-B)
• PRINT > Bitswitch > 146 Laser horizontal scanning direction magnification ratio adjustment(A-C)
• PRINT > Bitswitch > 147 Laser horizontal scanning direction magnification ratio adjustment(A-D)
• PRINT > Bitswitch > 148 Laser horizontal scanning direction write position adjustment(A-B)
• PRINT > Bitswitch > 149 Laser horizontal scanning direction write position adjustment(A-C)
• PRINT > Bitswitch > 150 Laser horizontal scanning direction write position adjustment(A-D)
5. Adjustment
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