Canon C2050, Service Handbook

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SERVICE MODE
S-4
1.3 Ending the Service Mode
Press the Reset key once to return to the service mode Initial screen (F00-102-01).
Press the Reset key twice to end the service mode and return to the User (standard)
screen.
If you have used any of the following service modes, be sure to turn off and
then on the main power switch after ending the mode: ADJUST, FUNC-
TION, OPTION.
1.4 Backing Up the Service Mode
Before shipment from the factory, each machine is adjusted individually, and the adjust-
ment values are recorded on its service labels:
• reader controller PCB service label (found behind the reader unit front lower cover)
• system controller PCB/DC controller PCB service label (found on the service documenta-
tion case behind the printer unit front cover; see the diagram)
If you have replaced the reader controller PCB, system controller PCB, or DC controller
PCB, be sure to detach the EEPROM from each PCB and attach it to the new PCB.
If you have cleared the RAM, on the other hand, the ADJUST and OPTION settings will
all return to the factory settings. If you have made adjustments in the field and changed the
service mode settings during the work, be sure to record the new settings on the service la-
bels. (If an appropriate column is not found on the label, use its blank space.)
F00-104-01
Mounting screw
Service documentation case