MICROJET Trouble-Shooting Guide 2
A) Ink lamp stays on
* New units shipped from the factory contain a solution that will cause the
lamp to remain on. This solution must be completely purged out, and ink
purged through, before the lamp will go out.
* Purge unit, light should go out.
* If lamp remains on, remove the two screw on the front cover.
* With power disconnected, look for broken wire at reservoir.
* If lamp remains on, remove tie wrap which hold wires to Power Supply
Board and lower the wire harness.
* Test resistance across pins 1 and 2 on side “A” of four pin connector.
Resistance across reservoir pins should measure approx. 1.5 meg. ohm (See
Troubleshooting Chart at end of this list.)
* If lamp remains on, call for service.
Head:
B) Ink lamp does not come on when ink container
is empty
* If lamp remains on, remove tie wrap which hold wires to Power Supply
Board and lower the wire harness.
* Test resistance across pins 1 and 2 on side “A” of four pin connector.
Resistance across reservoir pins should measure approx. 1.5 meg. ohm (See
Troubleshooting Chart at end of this list.)
Circuit should be open.
* Check resistance of lamp between pins 3 and 4 on four pin connector on
side “A”. Resistance should be 25 ohms. If circuit is open replace lamp. See
LOW INK LAMP/RESERVOIR LEAD REMOVAL procedure.
* Check voltage between pins 1 and 2 on four pin connector on side “B”. A
very small voltage of .075 volts DC should be present. If no voltage is
present, replace CPU assembly.
* Check voltage between pins 3 and 4 on four pin connector on side “B”.
Voltage should be 25 volts DC. If no voltage is present, replace CPU
assembly. (See Quick Reference Chart for part numbers.)
* If lamp remains out, call for service.
Head:
To Next Page
Loading...