Epson SQ-B50/2550 Technical Manual page 178

REV.-A
4.2.4 Electric Circuit Board Removal
This section describes the SEIMA board unit and SEIPS/SANPSE board unit removal.
4.2.4.1 SEIMA Board Removal
DANGER
• The SEIMA board includes a lithium battery. Read the notes in Section 4.1 thoroughly
before starting the removal.
WARNING
• When disconnecting the connector, pull the female connector out slowly while holding the
board with a finger to prevent the board from being damaged.
• Since the construction of connector CN20 is different from that of the others, handle it with
care to prevent it from being damaged.
Step 1 Remove the upper case. (See Section 4.2.2.1)
Step 2 Remove the tractor unit. (See Section 4.2.3)
Step 3 Remove the connector cover (for optional interface).
Step 4 Disconnect the cables from the all connectors on the SEIMA board. (14 cables: CN3 and CN8
through CN20)
Step 5 Remove the two CPS(P) screws (M3 X 8) securing the shield plate to the (lower) paper guide.
Step 6 Remove the two CPS(P) screws (M3 X 8) securing the board and the noise shield to the base
plate.
Step 7 Remove the CPS(P) screw (M3 X 8) securing the SEIMA board to the base plate.
Step 8 Loosen the four bent tabs fixing the SEIMA board to the lower case,then remove the SEIMA
board.
NOTE 1: To disconnect the cable from connector CN20, the harness latch must be removed.
NOTE 2: When removing the shield plate from the board, remove the two cable latch set screws, CBS
(M3 X 5), at the parallel interface connector.
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