Canon Color Bubble Jet BJC-5000 Series, Service Manual

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Part 5: Maintenance
BJC-5000
5-6
4.2.3 Unlocking the carriage lock
The carriage is normally locked at the capping position when the printer is turned off.
This feature is provided by the carriage lock mechanism in the purge unit. It prevents
the carriage from moving from the capping position during transportation or being
moved by hand to assure that normal printhead protection (capping) is performed.
If the carriage moves when the printer turned on during servicing, unplug the AC
power cord to unlock the carriage. If the printer is not turned on or the carriage does
not move, follow the procedure below to unlock the carriage lock manually.
You can also lock the carriage manually when you transport the printer.
4.3 Logic Board and Waste Ink Absorber Replacement Cautions
4.3.1 Logic board replacement cautions
The logic board’s EEPROM stores the various settings, waste ink amount, total count
of printed sheets, and other data related to the printer. The data stored in the logic
board’s EEPROM, excepting the total waste ink amount setting (25%, 50%, 75%),
cannot be rewritten into the new EEPROM after the logic board is replaced.
The data in the EEPROM installed on a replacement logic board is unclear. After the
logic board/EEPROM is replaced, clear the EEPROM. After clearing the EEPROM,
calibrate the auto-alignment sensor as described in
“Part 3: 3.4 Service Mode” (page 3-
18) .
When replacing the logic board (clearing the EEPROM), visually check the amount of
waste ink in the waste ink absorber. Replace the waste ink absorber or set the total
waste ink amount as required. Depending on the amount of waste ink already
absorbed in the waste ink absorber, ink may leak from the printer even before a waste
ink-full warning or waste ink-full error is output. (See
“Part 3: 3.4 Service Mode” on
page 3-18
for setting the waste ink amount.)
However, it is not necessary to replace the waste ink absorber or set the waste ink
amount if the printer has been in use for less than 2 weeks and less than 50 pages
have been printed out.
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Figure 5-4 Unlocking the Carriage Lock