User's Manual

044-xxxxx Rev. x 5-5
5-5. FIELD REPLACEMENT OF THE MODULE
The NTGY81AC multichannel power amplifier module can be replaced in the field on site by a
qualified technician with adequate ESD protection and experience maintaining RF power
amplifiers and similar equipment.
To replace a power amplifier module, proceed as follows:
1. Turn off 26 Vdc power to that specific module.
2. Disconnect the two RF cables and connectors P1 through P5.
3. Remove 13 screws that secure amplifier module to heat sink.
4. Carefully remove amplifier module from heat sink.
5. Add Thermstrate thermal interface pad to surface of replacement amplifier which
mates with heatsink.
6. Install replacement in reverse order of steps 1 through 4 above.