Seiko Instruments SII Black-and-White Raster Plotter LP-1020 - Manual (Page 70)

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Replacing the process cartridge
When the Process cartridge approaches the end of its life, the Process
lamp flashes and the following message appears. It is still possible to
continue to produce plots in this condition, but you must replace the
cartridge soon.
If a new process cartridge is not installed soon, the Process lamp goes out,
Error lamp comes on and plotting becomes impossible. The following
error message appears on LCD.
When the Process lamp flashes or goes out, follow the procedures
indicated below to replace the Process cartridge.
Precautions during replacement
Warning
Do not throw the process cartridge into fire. Doing so may
cause accident and fire.
Dispose of process cartridge as non-burnable garbage.
P R I N T R E A D Y
R E P L A C E P R O C E S S
S E T
P R O C E S S
C A R T R I D G E
Note
◆Above message may not appear in certain cases.