Loveshaw MicroJet I - I) Display Does Not Come up; J) CPU Losing Date;Time When Unit Is off; K) Valve Does Not Print but Purges; L) Valves Print but will Not Purge

I) Display does not come up
* Check if pump is running; if not, check that transformer is operating
properly. (See Troubleshooting Chart at end of this list.)
* If pump is running, check AC fuse under front cover and replace if blown.
* If fuse continues to blow, replace power supply board. (See Quick
Reference Chart for part numbers.)
* If fuse does not blow, test voltage at power board. If proper voltage is
present replace CPU.
* If proper voltage is not present, call for service.
Head:
J) CPU losing date/time when unit is off
* Reset and monitor for 24 hours with unit off.
* If retest fails, CPU battery must be replaced. See battery replacement
procedure.
* If CPU looses date/time with unit on, replace CPU.
Head:
K) Valve does not print but purges
* Plug a working valve in that position and test. If printing occurs, replace
valve. If no printing occurs, check ribbon cables, replace Valve, CPU or
Driver Board.
L) Valves print but will not purge
* Test continuity of purge switch with unit off and purge switch depressed.
Replace if defective; should be zero ohms.
* Test valve board resistor/diode for proper values (See Troubleshooting
Chart at end of this list.)
MICROJET Trouble-Shooting Guide 5