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3.
Remove the service tool.
4.
Adjust the rear setscrews on both ends of the
print wheel unit so that there is no vertical play
of the service tool disengaging levers and a min-
imum play sideways.
4. 4. 4 Print Wheel Brush Adjustment
1.
Position the brush assembly 1/64" to 1/32"
closer to the print wheels than is required to
just touch the print wheels (Figure 4-6).
4. 4. 5 Print Wheel Assembly Removal
1.
Remove the ribbon.
2.
Turn the print wheels to a position such that
the service tool can be inserted between the R
and E characters on the print wheels.
3.
Remove the two holding screws and locating pin
on each side of the unit.
4.
Place the service tool in position. Lift the
unit up and out of the machine using the handles
provided.
Replace the unit by reversing the removal procedure
with the service tool inserted as previously described.
When the assembly is lowered into position, exercise
care that the print wheels mesh properly with the
print wheel drive gear.
If
they do not mesh, the type
faces may be damaged. Check the print wheel as-
sembly adjustments before tightening the holding
screws securely (see 4. 4. 1).
4. 4.
6
Individual Print Wheel And Hanger Removal
1.
Remove the print wheel assembly (see 4. 4. 5).
2.
Remove the one screw at each end of the print
wheel hanger
gui~e
rod, noting the position of
the eccentric on the left end. Remove the guide
rod.
3.
Use a follow-up rod and carefully force out the
hanger pivot rod to the desired print wheel
position.
4.
Unhook the return spring and lift out the print
wheel and hanger assembly.
To assemble, reverse the removal. procedure.
Set the eccentric back to the position previously
noted.
4-6
1132 FEMM (4/67)
4. 5 PRINT EMITTER UNIT
4. 5. 1 Solar Cells and Lamp
Service Check
1.
Mechanical positioning of the solar cell block
assembly, light source or plastic focusing lens.
2.
Defective solar cell.
3.
Defective light source.
4.
Wiring or connector problem.
Adjustment
1.
Position the emitter timing disk against the
spacer on the print wheel. drive gear shaft and
clamp securely.
2.
Adjust the solar cell block to center the scribed
line (on the solar cell assembly) in the fifth row
of slots in the timing disk (Figure 4-7).
NOTE: Count the rows from either end - the
fifth row is in the middle.
3.
Shift the locating sleeve lengthwise on the shaft
for a clearance of
O
.15 (±0 .10") between the
solar cell assembly and the timing disk and
clamp the positioning sleeve (Figure 4-7).
4.
With the cell assembly against the locating sleeve,
rotate the cell assembly on the shaft so that the
solar cell assembly openings line up with the
centers of the print wheel gear shaft and the
solar cell mounting shaft. This adjustment is
facilitated by holding a straightedge against
the right side of the solar cell housing. The
straightedge should line up tangent to the print
wheel gear shaft and the solar cell mounting
shaft (Figure 4-8).
NOTE:
It
may be necessary to shift the posi-
tioning sleeve because of locating-pin inter-
ference.
5.
Clamp the solar cell assembly into position.
Loosen the positioning sleeve and position it
against the pin on the solar cell assembly.
Clamp in place.
NOTE: After this positioning has been set, no
adjustment on subsequent removal of the solar
cell assembly should be needed.
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