Rom Removal - Epson FX 890 - B/W Dot-matrix Printer Service Manual

4.2.7 ROM Removal

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WARNING
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1. Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, knob and
tractor unit. (See Section 4.2.3.)
2. Remove the upper housing. (See Section 4.2.4.)
3. Remove 5 CBS (M3
printer mechanism and lower housing and remove the shield cover. (See Section 4.2.5.)
4. Remove the ROM from the C229MAIN Board.
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.
Do not touch the heat sink attached to the switching FET (Q1) on the
power supply board right after power off, since 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, since it is not
electrically isolated.
4) screws and 3 CBB (3
FX-1180/FX-880 Service Manual
Chapter 4 DISASSEMBLY AND ASSEMBLY
12) screws securing the shield cover to the
4-12