Removing The Circuit Boards - Epson LQ-1500 Service Manual

The location of each printer component with the upper case detached is as shown in Fig. 4.2.

4.3.2 Removing the circuit boards

The electric circuit boards in the LQ-1500, control the Model-3660 printer mechanism, and include the
control circuit board (UXMCL), the driver circuit board (UXDRV), the power circuit board (UXPS or
UXFIL) and an interface circuit board (IUPIF, IUIE or IURS).
The procedure for removing these boards, described below, should be followed when even replacing a cir-
cuit part.
(1) Removal of control circuit board (UXMCL)
The control circuit board, on which many parts are provided, is the center of the electric circuit boards.
Removal work should be carried out with care in the following procedure:
STEP 1:
Remove the upper case. (See paragraph 4.3.1.)
STEP 2:
Remove the interface unit. (See paragraph 4.3.2 (4))
STEP 3: Remove the printer mechanism. (See paragraph 4.3.3.)
STEP 4: Remove the control circuit board sheet. (See Fig. 4.3.)
Fig. 4.2 Location of each component
Fig. 4.3 Control circuit board sheet
4-3