Roland Advanced Jet AJ-1000 Service Notes page 217

If the ink is put on the tissue or the waste cloth, O Ring in
<Supply Pump Part>
Tube Joint Adapter could be broken. Go to the procedure
[4. HOW TO REPLACE O RING (SUPPLY PUMP PART)].
If the ink is not put on the tissue or the strip of cloth, this is
the end of this checking.
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