4.
Gently pull on the Call switch button to remove it (Figure 2-8).
5.
Insert the I/O port assembly through the open cabinet door. Be careful not to
damage the Call switch while inserting it through the hole in the TLS’ frame.
6.
Make sure that the LEDs cable is positioned in the center of the cutout in the
TLS’ frame (Figure 7-19).
7.
Support the I/O port assembly with one hand and install all five mounting
screws (Figure 7-19).
8.
Plug the I/O port ribbon cable into the I/OPORT connector on the PCBA
(Figure 7-21).
9.
Gently press the Call switch button back onto the Call switch.
10.
If you removed a Side Panel, reinstall it (Section 7.4.4).
11.
Recalibrate the TLS. (See Section 5.3.2 for details.)
7.10 I/O Port PCBA
P/N 500607-01-5
CAUTION
After the I/O port PCBA is replaced in the I/O port assembly, the unit must be re-
calibrated after the I/O port assembly is replaced in the TLS.
The I/O port assembly must be removed from the TLS before the I/O port PCBA can
be replaced.
Tools Required:
•
Number 2 Phillips Screwdriver
7.10.1 I/O Port PCBA Removal
1.
Remove the I/O port assembly from the TLS (Section 7.9.1).
501380 Rev. B
Field–Replaceable Units (FRUs)
7-31
