Sharp ER-04RP Service Manual page 32

ER-04RP
cMethod of adjustment>
Value of A
Method of adjustment
5ms and lower
Move the PCB SA forward (toward the
Dlaten).
I r ,
5- 8ms No adjustment necessary
8ms and over
Move the PCB SA rearward (away from the
nlaten).
<Check 1> After the adjustment, check to ensure that no misalign-
ment occurs in bidirectional printing.
cCheck 2> Check to ensure that the flat cable is not in contact with
the HP and DP disks when the printhead SA is moved to
the extreme right end.
10-3-14. Disassembly/reassembly
of motor BK
Tools
Normal screwdriver (small size)
IDisassembly/reassembly flow]
CC
coil SA (Section 10-3-1)
Reassembly
I
I
Ribbon plate BK (Section 10-3-2)
I
Disassembly
J
Motor BK
[Disassembly procedure]
1. Remove two holding screws (4-2).
2. Remove the motor BK (4-l).
[Reassembly procedure]
Reverse the disassembly procedure.
NOTE: Use screw lock paint to fix the motor pinion in place.
However, the following adjustment is necessary.
cMethod of adjustments
Adjust the diode (for printing speed adjustment) on the connector
PCB SA so that the cycle A comes within the range shown in the
table below.
Model
Value of A
Method of adjustment
DP-61O 500ms - 555ms
Value of A is smaller than the
specified range: Use diode of greater
DP-612 602ms - 634ms capacity.
DP-614 649ms - 794ms Value of A is greater than the
specified range: Use diode of smaller
DP-617 844ms - 925ms
capac~.
10-3-15. Disassembly/reassembly of ribbon feed
block
IDisassembly/reassembly flow]
-
Reassembly
I Ribbon plate BK (Section 10-3-2)
I
Disassembly
I I
4
Ribbon feed block
[Disassembly procedure]
1.
Extract the ribbon drive pole SA (4-24) upward.
2. Extract the ribbon drive gear (4-23).
[Reassembly procedure]
Reverse the disassembly procedure.
10-3-16. Disassembly/reassembly of timing belt SA
ADJUSTMENT
Printing speed adjustment
cProcedures
Measure the cycle A of the RP waveform on the oscilloscope
when bi-directional printing is made.
Tools
Phillips screwdriver
Normal screwdriver (small size)
Tweezers
Tension gauge
Scale
RP
1-
<Check points>
RP waveform —
Pin @of connector CNB
GND
— Pin@ of connector CNB
Make the adjustment under the following conditions.
Ribbon cassette:
Paper:
Motor driving voltage:
Ambient temperature:
Continuous printing
Loaded
Loaded
+24Vfl
Room temperature
IDisassembly/reassembly flow]
Printhead (Section 10-3-3)
Reassembly
I
1
Carrier block (Section 10-3-8)
Timing belt SA
II
-30-