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microprocessor: Microprocessing unit.
MIM: Maintenance information manual.
mini-MAPs: MAPs 0500 through 0516.
miscellaneous MAP: A MAP that guides you in replacing
parts sequentially when all other MAPs have failed to
locate the problem.
MPU: Microprocessing unit.
Multi: A switch setting on the general logic probe.
N: Not (inverter).
N/C: Normally closed point of a switch.
N/O: Normally open point of a switch.
osc: Oscillator.
P: Plug
pickup: A device that senses electrical pulses.
planar: The electronic board that contains the MPU,
character generator, cable adapter, control storage,
control panel adapter, printer adapter, data storage, and
the offline tests.
poll, polled, polling: To question a station to determine
if it is ready to send or to receive data.
POR: Power on reset.
power on transition bit: A bit sent to the controller to
indicate that power is on in the printer.
pressure rolls: Rubber rollers that press paper against
the platen of the printer.
prt: Print.
pulsing: A distinct change between the on and off
conditions of the lights on the general logic probe.
pwr: Power.
Q: A symbol for transistor.
r: Reset.
reg: Register.
xiv
reinstall: Put back the part that was removed.
remove: Take a part off the printer.
replace, replaced: Put a new part back in place of one
that was removed.
retract ramp: The metal blade that moves the print
head away from the platen when the carrier is moved as
far as possible to the left in the printer.
ribbon drive lines: The material that is wrapped around
the ribbon drive clutches to drive them when the carrier
is moved.
s:
Set
S8 (fuse): A fuse that opens the circuit after a delay.
SCS: SNA character string.
SOLC: Synchronous data link control.
serv: Service voltage or ground.
short: Shorted or grounded circuit.
sideframe: A plate on each side of the printer
mechanism.
SL T:. Solid logic technology.
SNA: System network architecture.
solid: A continuous failure or indication.
SP: Stop.
ST: Start.
static eliminator: A printer part (reference 100
II>
that
attaches to the forms rack. The static eliminator
removes electrical
c~arges
that build up when the forms
move through the printer.
stepper motor: A motor that moves in regular steps.
synchronization: Two or more events occurring at the
same time.
stuck: Unable to move.
TO: Time delay.
TP: Test point.
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