September 5, 2008 6881076C25-E
4-58 Troubleshooting Procedures: Power Amplifier Procedures
8. If no failure is located from the previous checks, troubleshoot the power control circuitry.
Figure 4-9. PA Test Adapter, 40 Watt Power Amplifier
Table 4-19. DC Voltages and Input Power Chart
Test Keyed 9.4 V 9.6 V
CONTROL
VOLTAGE
DRIVE
POWER IN
(mW)
A+
(V)
Transmit 9.4 9.6 See note
a
a. Set initially to zero. Increase value until power equals 46 Watts or 10.0 V maximum.
Do NOT exceed 10.0 V.
30 13.0
Receive 0 9.6 0 0 13.0
A+ TO COMMAND BOARD
CURRENT SENSE +
A+ TO COMMAND BOARD
CURRENT SENSE -
CONTROL VOLTAGE LIMIT
CONTROL VOLTAGE DRIVE
K9.4
FEMALE RECEPTACLE
CONNECTOR W 100 MIL
SPACING MATES TO P853
REGULATED 9.6V
V DETECT
TEMP SENSE
8
6
4
2
10
12
7
5
3
1
9
11
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