REV.-A
Table 5-6. Repair of Printer Mechanism (Continued)
Problem
Symptom
Cause
Checkpoint
Solution
The ribbon feed is
The ribbon is not
The ribbon car-
Dismount the
Replace the ribbon
abnormal.
fed.
tridge is defective.
bon cartridge,
cartridge.
tate its knob manu-
ally, and check
whether the ribbon
feeds normally.
Foreign substances
Check whether the
. Remove any
are caught in the
ribbon driving gear
eign substance.
gears.
rotates when the
. Replace the
carriage is moved
bon-feed
manually.
mechanism.
The ribbon feeds
The planetary lever
Move the carriage
Replace the
properly only when
is defective.
manually, and
feed mechanism.
the carriage moves
check whether the
in one direction
planetary lever
(i.e., it fails to feed
turns in reverse
when the carriage
and engages the
moves in the other
gear.
direction).
Paper becomes
stained.
Ink stains appear
on areas where
there is printing.
The ribbon mask is
Check whether the
Reinstall the ribbon
not correctly
ribbon mask is in
mask.
positioned.
the correct
position.
The platen gap is
Set the gap adjust
Adjust the gap.
not adjusted.
lever to the second
Refer to Section
position, and check
4.1.2,
Platen Gap
the gap between
Adjustment.
the tip of the
head and the
platen.
The appropriate
value is 0.38 mm.
Printing continues
Printing continues
The paper-end
Check the paper-
Replace the paper-
after the paper
past the paper
sor is defective.
end sensor switch.
end sensor.
ends or when no
end.
paper is loaded.
5-21
Summary of Contents for LQ-1170
Page 1: ...LQ 1170 24 PIN DOT MATRIX PRINTERS TM LQ8 1170 ...
Page 2: ...L Q 8 7 0 1 1 7 0 SERVICE MANUAL EPSON T Printed on recycled paper ...
Page 101: ...10 9 91 Yes NO Replace pluggable chips on main board 5 6 ...
Page 110: ...Table 5 4 Repair of the Power Supply Board Continued 5 15 ...
Page 118: ......
Page 121: ...REV A Figure 6 2 LQ 870 Lubrication Points 6 3 ...
Page 122: ...REV A Figure 6 3 LQ 1170 Lubrication Points 6 4 ...
Page 134: ...1 I II ...
Page 135: ...REV A Q m u D w IL 0 1 xl Figure A 3 CO60 DRV Board Circuit Diagram A 11 ...
Page 136: ...Figure A 4 CO60 PSB Board Circuit Diagram A 12 ...
Page 138: ...LO SLOE002 OWO9 1Nd 0 9 0 3 5 f l P I 11 I 01 I 6 I 8 1 L 9 I 9 I B I I2 I 2 I 1 ...
Page 142: ...REV A Fl 24ov T3 IsA I I II II AL I CU rl Figure A 10 C060 PSE Board Component Layout A 1 8 ...
Page 143: ...LMS d10 IP IMS dla ...
Page 144: ...REV A A 4 EXPLODED DIAGRAM Figure A l 2 1 Exploded Diagram for LQ 870 A 2 0 ...
Page 145: ......
Page 146: ...REV A Figure A 13 1 Exploded Diagram for Model 5DlO A 22 ...
Page 147: ... 5 2 5 610 c 3 5 9 0 El ...
Page 149: ...REV A A 5 CASE OUTLINE DRAWING Figure A l 4 1 Case Outline Drawing for LQ 870 A 25 ...
Page 151: ...lllllll IllI l l IIIIII II0 IIll III1 I I I C O 6 1 M A I N B o a r d A 3 7 ...
Page 152: ... U nRonenl2 i i C O 6 0 HAIN B t _1 m r OL J IIA IS I 19 CNI 36 I I8 I 23 IS ...
Page 153: ...a i iJ 0 E fig tfti I z ...