Sharp ER-04RP Service Manual page 30

ER-04RP
IADJUSTMENT I
Measure the gap between the printhead and the platen with the
thickness gauge, and move the platen BK back and fotih to adjust the
gap to 0.55mmH.05m-m at right and left ends as well as at the
center.
After the adjustment, tighten the holding screws to firmly fix the platen
BK in place.
NOTE: Fit the ribbon mask after the above adjustment.
10-3-10. Disassembly/reassembly of PF (paper
feed) block
I Tools
~Normal screwdriver (small size)
Long-nose pliers
Tweezers
IDisassembly/reasemblY flow]
CC coil SA (Section 10-3-1)
'r
Reassembly
I PF coil SA (Section 10-3-4)
I
Disassembly
.L
II
PF shaft BK
II
[Disassembly pro-ure]
1.
2.
3.
4.
Remove the E-ring (2-8) holding the PF shaft BK (2-5).
Push the bearings (gearwheel train side) installed on the right and
left sides of the frame (l-1) toward the inside to remove the PF
shaft BK (2-5), PF shaft washer (2-7), PF shaft bearing (2-6), two
pin wheel washers (2-3) (for P type), and two pin wheels (2-13)
(for P type).
Using the long-nose pliers, unbend the crimped edges (four lma-
tions) of the side frames holding the rear plate (2-4) and remove
the rear plate (2-4).
Remove the pin wheel guides (2-14, 2-15) and the lock levers
(2-16, 2-17).
[Reassembly procedure]
Reverse the disassembly procedure.
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
Observe the direction in which to assemble the pin wheel
washers. (For P type only)
Install the pin wheels to the PF shaft so that the pins on the
right and left pin wheels are aligned with each other.
Check to ensure that the PF shaft bearings move lightly
and smoothly.
Observe the direction in which to assemble the washers.
Washer
I
PF shaft bearing
\
@
b
Q
10-3-11. Disassembly/reassembly of paper
pressure rollers
I
Tools
Tweezers
Normal screwdriver
IDisassembly/reasemblY flow]
F
Printhead SA (Section 10-3-3)
Reassembly
Y
Disassembly
L
Paper pressure rollers
[Disassembly procedure]
1. Remove the two paper pressure rollers (2-3) from the paper pres-
sure roller springs (2-4) using the tweezers.
2. Insert the normal screwdriver to extract the spring upward.
[Reassembly prmedure]
Reverse the disassembly procedure.
However, the following adjustment is necessaty.
i ADJUSTMENT!
As shown in the figure below, lightly press the center of the paper
pressure roller in the arrow direction using the normal screwdriver to
see if the pressure roller moves parallel. If the balance is not good,
bend the pressure spring retainers on the bottom plate in the arrow
directions (e) to adjust the balance.
Pressure roller
e spring retainers
Bend retainers in arrow directions to adjust spring balance.
10-3-12. Disassembly/reassembly of RP sensor SA
Tools
Phillips screwdriver
1
I
[Disassembly prooedure]
1.
Remve the holding screw (5-16).
2. Disengage the cord from the cord holder pawl.
3. Unsolder the cord from the connector PCB SA (5-2) using the
soldering pencil.
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