Sharp ER-A411 / ER-A421 (serv.man3) Service Manual ▷ View online
MAINTENANCE, DISASSEMBLY & ASSEMBLY
5-1
CHAPTER 5. MAINTENANCE, DISASSEAMBLEY & ASSEMBLY
1. MAINTENANCE
Cleaning the Printer (Printer Head / Sensor / Roller)
When the printed text is getting dark or faint, paper dust may be stuck to the printer head, sensor and/or roller. Clean
them as follows;
Never touch the printer head with a tool or anything hard as it may damage the head.
The paper cutter is mounted on the printer cover. Be careful not to cut yourself.
1)
Disconnect the power plug from the power outlet.
2)
Remove the printer cover.
3)
Lift up the print roller arm.
4)
Remove the paper roll referring to the “Removing
the paper roll” section.
Clean the printer head with a cotton swab or soft
rag moistened with ethyl alcohol or isopropyl
alcohol.
5)
Clean the roller and the sensor in the same
manner.
6)
Reset the paper roll correctly by following the
steps in “Installing the paper roll.”
2. DISASSEMBLY & ASSEMBLY
2-1
Main body
Top unit
Main unit & Drawer unit
2-2
Top unit
Main LCD unit
Key I/F PWB and KEY sheet
Pop up unit
2-3
Main unit
Main control PWB
Printer
unit
Printer I/F PWB
SIO I/F PWB
Power
UNIT
2-4
Drawer unit
Drawer solenoid
⚠
CAUTION
CAUTION BEFORE DISASSEMBLY AND ASSEMBLY
Be sure to disconnect the power plug from the
power outlet.
Remove roll paper and winding shaft before
disassembly and assembly.
MAINTENANCE, DISASSEMBLY & ASSEMBLY
5-2
2-1. MAIN BODY
TOP UNIT
1)
Remove the printer cover
When removing the printer cover, lift up its rear.
When installing the printer cover, hook it on the pawls
on the cabinet and shut it.
2)
Remove the screws
3)
Lift the rear side of the top unit slightly toward front
side.
･ Since the top unit is connected with the flat cable and
the earth wire, do not lift it excessively.
4)
Remove the flat cable and the earth wire from the main
PWB, and remove the top unit and remove the top unit.
⚠
CAUTION
MAINTENANCE, DISASSEMBLY & ASSEMBLY
5-3
2-2 Main unit and drawer unit
Model V6 and V7
1)
Remove the screws.
2)
Slide the main unit toward front side and lift it
slightly
Since the drawer unit is connected with the earth wire,
do not lift the main unit excessively.
Model V4 and V9
1)
Open the drawer that pull the lever on bottom side
of machine.
2)
Pull out the drawer.
3)
Remove the thumbscrew in the drawer unit.
4)
Remove the screw.
5)
Slide the main unit toward front side and lift it
slightly.
⚠
CAUTION
①
②
①
②
MAINTENANCE, DISASSEMBLY & ASSEMBLY
5-4
2-3. TOP unit
2-3-1 Operator display unit
2-3-1 Operator display unit
1)
Remove the screws what fixed together with GND wire.
Then Pull out the LCD (MAIN) cable from ferrite-core and
cable holder.
Note: When assemble the GND cable, fix the connectors of
GND wires at about 30degrees position as above;
2)
Pull put the Operator display unit.
3)
Remove the screws and slide the main LCD back cabinet to
arrow direction.
Note: When assemble the Operator display unit, to make sure to
fix the pawls (3psositions) on top side.
4)
Remove the screws and then hinge unit.
5)
Remove the screws and then LCD angle.
About 30°
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