Overview; Disassembly Precautions; Tools And Instruments - Epson FX 890 - B/W Dot-matrix Printer Service Manual

4.1 OVERVIEW

This section describes procedures for disassembling and assembling the printer. Unless otherwise
specified, disassembled units or components can be re-assembled by reversing the disassembly
procedure. Therefore, no assembly procedures are included in this section. Precautions for any
disassembly or assembly procedure are described under the heading "CHECK POINT". Any
adjustments required after disassembling the units are described under the heading
"ADJUSTEMNTS".

4.1.1 Disassembly Precautions

Follow the precautions below when disassembling the printer.
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WARNING
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CAUTION
To maintain efficient printer operation, take the precautions below:
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4.1.2 Tools and Instruments

The table below lists the tools and the instruments required for disassembling, assembling or
adjusting the printer. Use only tools that meet these specifications.
Name
Phillips Screwdriver
Phillips Screwdriver
Box Driver
Tweezers
Round-nose pliers
Thickness gage
Soldering iron
E-Ring holder
Multi-Meter
Oscilloscope
Note) All tools and instruments listed above are commercially available.
Rev. B
Before disassembling, assembling or adjusting the printer,
disconnect the power supply cable from the AC power socket.
Failure to do so might cause personal injury.
Be careful with the printhead when you handle it as it may be very
hot right after printing.
Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board right after power off, as it may be very hot.
Never touch the heat sink attached to the switching FET (Q1) while
The AC power cable is connected to the AC outlet, as it is not
electrically isolated.
Use only the recommended tools for maintenance work.
Use only the recommended lubrications and adhesives (See Chapter
6.)
Adjust the printer only in the manner described in this manual.
Be aware that the existing drawings for Fx-880 are substituted for
FX-1180. It is because no exclusive drawings for FX-1180 has been
made since the major mechanical difference between FX-1180 and
FX-880 is width only.
Table 4-1 . Tool and Instrument List
Specification
No.2
No.1
7.0mm Diagonal
Size: #6
OHM/Voltage/Current
Min. 50MHz
FX-1180/FX-880 Service Manual
Chapter 4 DISASSEMBLY AND ASSEMBLY
EPSON Part No.
B743800200
B743800100
B741700200
B741000100
B740400100
B776702201
B740200100
B740800800
4-1