Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 492 / 987

Overview
It is possible to see each item of service mode so that those who access to service mode can understand how to use them.
The main types of this machine's service mode are shown below.
Points to Note when Executing Service Mode
• When setting/executing service mode, do not open/close the cover or turn off the power while "active" is displayed. Otherwise,
it may not set/execute correctly.
• Depending on the service mode, some items are listed as "Do not use this item at the normal service" in "Caution". The item
is created on the basis that it will be used in the following situations, so it must not be used for any other situations.
• When entering setting values while replacing the PCB or clearing RAM data (mentioned in "Use case")
• When there was an instruction from a service office (for reasons such as a large adverse effect or setting is difficult)
• When taking individual measures (tender business, etc.)
Service Mode Menu
Press the button to display the initial screen of each mode.
The differences between these modes are described below.
Top screen
MODELIST
In this mode, functions for referring to each item in service mode, etc. are available.
Updater
This button is used to access the CDS and UGW servers and update system software.
BACKUP
This button is used to back up the service mode setting values.
RESTORE
This button is used to restore the service mode setting values backed up by [BACKUP].
SITUATION
This function displays service mode items according to the situation.
LUI MASK
This button is used to display a mask screen to prevent operations from being performed from the Control Panel while the
service mode is being accessed from a remote PC.
Description of Service Mode Items
The description of the initial screen, the main items, the intermediate items and the sub items can be displayed.
After selecting any item of the initial screen, main item, the intermediate item or the sub item, pressing "i" (Information Button)
displays the description of the selected item (hereinafter referred to as the service mode contents).
8. Service Mode
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