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A.
POWER
A-I TOTAL
1.
Damaged power card.
2.
Open AC line fuse.
3.
Open SV supply fuse, FI.
A-2
IIiTERMITTEIiT - PARTIAL
1.
Defective +SV logic board.
2.
Defective +12V logic board.
3.
Improper AC line voltage.
B.
PRINTING
8-1
HEAD MOVES BUT NO PRINT/POOR
REGISTRATlOIl OR ERRATIC PRINT
1.
Improper print head position.
2.
Dirty fingerboards or circuit
board connectors.
3.
Dirty or defective timing fence.
4.
Improper adjustment of optic
bundle.
S.
Improper optic lamp filament
al ignment.
6.
Defective optic lamp or lamp
socket.
7.
Improper alignment of timing
fence to optic slit.
S.
Defective video amplifier.
g.
Defective ribbon cable.
10.
Defective +SV logic board.
I!.
Defective +12V logic board .
12.
Defective driver board.
B-2 MISSING DOTS, POOR OR INTERMITTENT
PIN REGISTRATION, ALL CHARACTERS
1.
Improper print head position.
2.
Dirty fingerboards or circuit
board connectors.
3.
Dirty or defective timing
fence.
4.
!mproper damper piston and
cyll nder alignment.
5.
Defective RTP or EOP switch.
6.
Defective logic board fus ...
7.
Improper optical system
alignment.
S.
Defective video amplifier.
g.
Defective ribbon cable.
10.
Defective driver board.
II.
Improperly adjusted or de-
fective print wire solenoids.
B-3 MISSING OR EXTRA DOTS. CERTAIN
CHARACTERS ONLY
1.
Defective ROM.
2.
Def~ctive
P.C. runs In character
generator.
B-4 LINES ACROSS PAGE
I.
Improperly installed print head
cover.
2.
Ir.lproper penetration adjustment.
3.
Defective print wires.
4.
Defective ribbon cable.
5.
Poor logic board to driver board
connee
t
1 on.
t.
Defective driver board.
7.
Defective logic board.
C.
DRIVE
C-I
CARRIAGE HOVEMEilT ERRATIC
1.
Improper clutch gap.
2.
Improper main drive belt tension.
3.
Dirty carriage guide bar.
4.
Improper penetration adjusb'lent.
5.
Improper ribbon drive rack and
pinion adjustment.
6.
Improper cylinder and damper
pi<ton alignment.
7.
Defective or Improperly adjusted
drive pulleys, gear< or belts.
C-2 CARRIAGE STICKS OR BINDS
1.
Fiber optics bundle touching
timing fence.
2.
Improper drive belt tension.
3.
Improper damper piston and
cylinder alignment.
4.
Improper ribbon drive rack and
pinion adjustment.
5.
Right hand ribbon drive assembly
driving pawl may have dropped
behind ribbon releaser.
C-3 CARRIAGE MOVES FORWARD BUT DOES
NOT RETURN
C-3a Clutch On
1.
Defective LO.P switch.
2.
Defective driver board.
3.
Defective logic board.
C-3b Clutch Ott
I.
Defective return spring.
2.
Improper ribbon drive
rack and pinion adjustment.
3.
Defective ribbon drive
assembly driving pawl.
4.
Improper clutch gap.
C-4 CARRIAGE DOES NOT RETURN ALL THE
WAY TO LEFT
I.
Improper damper pi ston and
cylinder alignment.
2.
Improper ribbon drive rack and
pinion adjustment.
C-S CARRIAGE DOES NOT MOVE FORWARD
1.
Improper damper piston and
cylinder al ignment.
2.
Improper clutch gap.
3.
Defective -I2V supply fuse. F3.
4.
5.
6.
7.
8.
9.
10.
II.
Di rty board contacts.
Defective driver board.
Defective RTP switcr ..
Defective clutch.
Defective logic boards.
Defective drive motor.
Defective rr:otor control cir-
cuitry
(if
provided).
Inappropriate input data.
D.
RIBBON FEED
0-1
NO RIBBOII FEED
1.
Improperly seated ribbon spool.
2.
Irr.properly adjusted ribbon re-
vers i
n9
rod.
3.
Rack. and pinion assembly teeth
missing.
4.
Broken
or
missing ribbon drive
pa"l (<ee C-2 item 5).
0-2.
ERRATIC
MOVE~ENT
D-2a Scrolling or Folding
I.
Improperly mounted
ribbon holding bracket.
2.
Bent revers 1
ng ann
or
tens ioner.
D-2b Too Slack
1.
Missing or weak ribbon
holding plate springs.
2.
Broken or missing
ribbon stop pawl.
L
PAPER MDVEMENT
E-I
FORMS RUNAWAY
E-Ia Paper Timeout
1.
Defective VFU lamp or
sensor.
2.
Defective paper tape.
3.
Defective logic boards.
4.
Improper alignment of
reader bracket lamps to
tape holes.
S.
Improper gap between upper
and lower VFU reader
brackets.
6.
Printer receiving form
feed or vertical tab
coomands with no VFU in-
stalled.
E-Ib Paper Runs Continuously
1.
Defective armature return
spring.
2.
Solenoid slide movement re-
stricted.
3.
Excessive solenoid slide
gap.
4.
Restricted armature move-
ment •
5.
Defective .drlver board.
6.
Defective logic boards.
E-2
PAPER
SKEW
OR
JAM
1.
Print head ·too close to paper.
2.
Incorrect paper feed.
3.
Improper pin feed sprocket
aligment.
4.
Improper pin feed belt tensior.
5.
Paper pan friction against
foms.
e.
Pin feed holder paper
t~ickness
setting too small.
E-3 NO FORM FEED
1.
Irnproper gear tratr. adjustment.
2.
Paper feed o-ring slipping.
3.
Defective TOP OF FORM switch or
contacts.
4.
Defective driver board.
5.
Defective line feed solenoid fuse,
F7.
6.
Oefective logic boards.
7.
Improperly adjusted platen knob.
E-4
ERRATIC LINE SPACING
()"cessive back stop pawl and cam
,,",chanism ploy.
2.
Backlash in platen knob.
J.
Improper gear mesh.
4.
Paper feed o-ring slipping.
E-S
NO LINE FEED
1.
Defective or miSSing platen
knob.
2.
Improper solenoid slide gap.
3.
Paper feed o-ring broken or
slipping.
4.
Defective driver board.
5.
Defective line feed fuse. F7.
6.
Defective logic boards.
7.
Solenoid slide binding.
S.
Armature binding.
9.
Excessive solenoid armature
spring tension.
10.
Defective solenoid.
II.
Defective LINE FEEO switch or
contacts.
12.
Improperly adjusted drive train.
E-6 MUl TlPLE LINE FEED
1.
Exce<sive solenoid slide gap.
2.
Defective armature return
spring.
3.
Magnetic field concentrating
disc missing.
4.
Solenoid slide binding.
5.
Excessive line feed pulse
width.
6.
Excessive lubricant on or
dirty solenoid slide.
E-7
INTERMITTENT OPERATION
I.
See E-3 Ind E-S.
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