Replacing A Power Amplifier - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 9: GTR 8000 Base Radio FRU Procedures
5 Pull on the metal handle to disengage the power supply from the backplane, and remove it
completely from the chassis.
6 Remove the fan cover from the power supply module:
a Using a T15 bit, remove the four screws that connect the cover to the sides of the power
supply module.
b Slide the cover off (tilting the top edge out and lifting the bottom edge above the power
supply handle).
7 Disconnect the power cable located above the fan.
8 Remove the two screws that secure the fan to the power supply.
9 Remove the fan and insert the new fan.
10 Secure the fan to the power supply with the two screws removed in step 8.
11 Attach the power cable for the fan to the connection on the power supply.
12 Replace the fan cover:
a Slide the cover on, tilting the bottom edge in, past the power supply handle.
b Using a T15 bit, insert and tighten the four screws that connect the cover to the sides of the
power supply module.
13 Slide the power supply into place, pushing gently until it seats.
14 Using a T20 bit, tighten the two captive screws on the front of the power supply module.
15 Turn the power button to On (I), and verify that the power supply is operating properly:
• The power supply Status LED is green.
• The power supply Alarm LED is off.
• The power supply Fan LED is off and the fan is operating.
• Proper operation is confirmed using software tools, such as the UEM, and the Power Supply
Metering Screen in CSS.
16 Place the base radio in Normal Mode, as follows:
a From the menu, select Service → Test and Measurement Screen.
b Click Change to Normal Mode.
c At the confirmation screen, click OK.
The base radio halts activity in the current mode and switches operation to the requested
mode.
9.8

Replacing a Power Amplifier

The following figure shows the captive screws that secure the power amplifier module to the chassis in
the GTR 8000 Base Radio.
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