Nortel Meridian 1 Hardware Replacement Manual page 178

Page 178 of 250
553-3001-520 Standard 17.00 January 2002
Replacing equipment
c. At the top of the rear of the module, disconnect the connector from
the module power harness.
d. Disconnect the pin headers on connector J2 on the backplane;
disconnect the ribbon cable connector.
3 Remove the top cap:
a. Remove air exhaust grills at the front and rear of the top cap (see
Figure 16 on page 178). Pull forward on the two clips underneath
the front edge of each grill and lift up to remove the grill.
b. Use a 5/16" socket wrench to remove the six bolts that secure the
top cap and perforated panel (see Figure 17 on page 179). Lift off
the top cap only.
Figure 16
Air exhaust grills on the top cap
Air exhaust grill
4 Remove the thermostat harness:
Note: The column LED and LED wiring are part of the thermostat
harness.
a. Pull the LED ring away from the LED mounting bracket (see
Figure 18 on page 179). You may need to loosen it with a
standard screwdriver.
b. Push the LED back completely out of the collar on the LED
mounting bracket.
c. Remove the LED ring by pulling it forward over the LED. Keep the
ring handy; you will use it with the replacement equipment.
d. Remove the screw that secures the perforated panel at the LED
mounting bracket.
Top cap
Air exhaust grill
Clips
Module
553-5886