AFP Imaging Mini-Medical Series, Инструкция по установке, эксплуатации и сервисному обслуживанию

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Service
Mini Med Series 0000061122
Service Procedure 5-lA
Film Sensors and Adjustments
Mini-Medical processors up to and including S/N MM1899-90
Film sensing for Mini-Medical processors up to and including S/N MM1899-90 was
accomplished by mounting a magnetic reed switch assembly in the center of the upper
edge inside the molded feed tray adapter.
When film is not present in the feed tray, a magnetic pendulum assembly is in close
proximity to the reed switch, wired in a normally closed configuration. This means that
it is held open by the magnet when film is not present. When film is inserted in the feed
slot, the pendulum is pushed upward and away from the reed switch, causing it to close.
This puts a short across pins 1 and 2 of J13 on the ready tone generator board, putting
the machine into the process mode. When the pendulum returns to its position of rest,
the reed switch opens initiating timers for the beeper, wait light and cycle time.
Approximately 8 seconds after the reed switch opens the beeper should sound and the
wait light should go out.
If a machine fails to go into standby, the magnet may have weakened, or the switch may
be stuck in the closed position; or the switch may be adjusted too far away from the
pendulum to activate the switch.
First, unplug J13 from the ready tone generator board. If the wait light goes out and the
beeper sounds after approximately 8 seconds, the switch is either shorted or the magnet
is failing to activate it.
To test the switch, first remove the switch from the machine. Use a magnet to activate
the switch while looking across the switch with a meter set on Ohms. If the switch fails
to open it should be replaced. If it does open, try adjusting it as close to the pendulum
assembly as possible. If this doesn’t help replace the pendulum assy.
If the machine remains in the process mode after unplugging the switch from the J13
connector on the ready tone board, unplug the ready tone board from J13 on the main
logic board. If the wait light goes out after approximately 8 seconds, the ready tone
generator board should be replaced. If unplugging the ready tone board does not clear
up the problem, a rare problem on the logic board itself is indicated.
Mini-Medical processors S/N MM1900-90 and above
Starting with S/N MM-1900-90, Mini-Medical processors feature a new style of film
sensing. This is in the form of two hall-effect magnetic digital sensors (P/N 21878)
located approximately three inches in from the inner right and left sides of the feed tray.
There are now two magnetic pendulum assemblies (P/N 21893), located above the feed
tray, that are used in conjunction with these sensors.
Activation of either switch will put the machine into the process mode. The purpose of
the dual switch arrangement is to accommodate smaller size films. The feed tray assembly
has changed to P/N 21876. (The part numbers given above are for 1 each of the parts.)
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