Disassembly Of Electric Ciucuit Block; Fig. 3.4 Dismounting Of Driver Circuit Board - Epson MX-80 Technical Manual

3.3.2
Disassembly of electric circuit block
The electric circuit block of the
MX~80
controls the M-321 0 printer mechanism and consists
mainly of a driver circuit board, a contorol circuit board, a power transformer and a fuse and
filter circuit board. The disassembly procedures described here for these major circuit com-
ponents are useful when replacing any circuit components found to be defective as a result
of the troubleshooting detailed in section 3.4.
NOTE: Prior to dismounting any of the major circuit components, be sure that the power
connector is disconnected from the AC outlet.
(1) Dismounting of driver circuit board
When dismounting the driver circuit board, observe the following procedure.
STEP 1. Unplug the male contact type connector CN6
<D
extending from the M-3210
printer mechanism to the driver circuit board. (See Fig. 3.4.)
STEP
2.
Remove the two screws
®
located by the female contact type connector CN6
@
to secure the driver circuit board. (See Fig. 3.4.)
STEP 3. Remove the driver circuit board.
Fig. 3.4 Dismounting of Driver Circuit Board
3-5
REV. A