Simplex 4010 Installation Instructions page 2

Removing the SFIO Chip
(Continued)
Door Assembly
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5. Using a T-15 Torx driver, unscrew the four No. 6 screws that connect the
keyboard mounting plate assembly from the SFIO mounting plate.
6. Gently lift the keyboard mounting assembly straight outward. Disconnect
the keypad harness connecting the keyboard mounting assembly to the SFIO
board (P11). Set the keyboard mounting plate assembly aside.
CAUTION: Pay careful attention to avoid pulling at the keypad
harness that connects the keyboard mounting assembly
to the SFIO/Board (P11). If the harness is damaged, the
most likely symptom is a CRASH #0A, all LEDs flash,
and the piezo constantly sounds.
7. Locate the IC (U25) on the SFIO board. The IC is positioned half way
down the right side of the board next to P7 (see Figure 2).
8. With an IC Extractor (553-412, 553-413, or compatible tool), remove the IC
from the SFIO board.
Retainer
Back Box
Figure 1. Expanded View of a 4010 FACP
2
Chassis
SFIO Board
Assembly
Keyboard
Mounting
Assembly