Epson FX-80 Technical Service Data page 5

PRELIMINARY SERWiCE
CHECKS
(Continued)
MECHANICAL REMOVAL AND REPLACEMENT
(Continued)
Holding Lever Assembly.
Lift
up
the Scale
and Paper
Holding Levers
to
remove them from
the side frames.
Keep
the
two Lever Springs
(5-21) (5-26)
released
at
this point with
the assembly.
Reassemble
in
reverse
order.
FRICTION/SPROCKET PLATEN REMOVAL
Perform Paper Feed Motor/Transmission Gear Removal and
Scale/Paper Holding Levers
Removal
procedures.
Remove
the nuts on
the
ends
of
the Sprocket
Guide
Shaft
(5-3).
Re-
move
the
E-ring
from
the
left
shaft
end
of
the Platen
Assembly
(5-2).
This
will
release the
Left
Bearing
(5-4),
flat
washer and
thrust
washer. Push
the
Left
Bearing
outward
and
slide
the Platen
Assembly
toward
the
right.
When
bear-
ings are clear of side frames,
lift
Platen
Assembly
out
of
chassis.
To remove
Left
Sprocket
Assembly
(5-6),
slide
the
assembly
off
the
left
end
of
the Platen
Assembly and
Sprocket
Guide
Shafts.
To remove
Right Sprocket
Assembly
(5-7),
remove
the
Spring
Pin (SP)
holding the Platen Gear
(5-3),
plain
washer,
leaf
spring,
Spacer
(5-5)
and Right Bearing
(5-4).
Slide the
assembly
off
the
right
end
of
the Platen
Assembly
and Sprocket Guide
Shafts.
TRACTOR REMOVAL
Remove
seven screws
holding
tractor to
cabinet bottom.
Disconnect Connectors CN4,
CN5
and
CN8
from
FMBD
Board.
Lift
tractor
assembly
from cabinet bottom.
PAPER EMPTY SENSOR REMOVAL
Remove
upper
case.
See Disassembly
Instructions.
Dis-
connect Connector
CN8
from
the
FMBD
Board and
free
wires
from
restraining
hook
next
to
Sensor. Release Spring
(3-2)
and
carefully
bend back
the holding tab
at
lower edge
of
Sensor
board.
Lift
board from the Paper
Guide
Assembly.
To remove
the
Sensor Lever
(3-1),
remove
the
E-ring
and
Shaft
(3-3)
from the
lever.
Reassemble
in
reverse
order.
TEST
EQUIPMENT
AND
TOOLS
REPLACEMENT
PARTS
TEST
EQUIPMENT
ITEM NO.
PART
NO. DESCRIPTION
Digital
Volt/Ohm Meter
Logic
Probe
Oscilloscope
TOOLS
Phillips
Screwdriver
Low
Voltage Soldering Iron
Desoldering Tool
Small Screwdriver
DB1 X340300010
F1
X502060020
HD
IC3B
Y440804101
M3
F31
5059000
M4
F31
5064000
SW1
X620400580
SW1A
SW99
A1 70202502
T1
Y440501000
4-1
F303014010
Diode, Rectifier
AC
Fuse,
2A
Printhead (Includes Solenoids)
IC,
Microprocessor
Motor, Carriage (Timing
Belt)
Motor, Paper Feed
Switch, Dip
Switch,
Power
Switch,
Paper Empty, Reed
Transformer,
Power
Control Panel
Assembly
FMBD
Board
Filter
Board
Timing
Belt
IV