6815854H01-A
June 15, 2005
Troubleshooting Charts:
Flowcharts
5-41
5.6.30 RF Power Amplifier (RFPA)—No or Low TX Power Output (380–470 MHz and
450–520 MHz)—Part 5 of 5
Table 5-6. RFPA DC Voltages
Description
Location
Voltage (Vdc)
(380–470 MHz)
Voltage (Vdc)
(450–520 MHz)
A+ = 13.6 Vdc
U5501, VD1
U5501 pin 14
9.0–9.3
9.0–9.3
U5501, RFOUT
U5501 pins 6 and 7
9.0–9.3
9.0–9.3
Q5502 Gate Bias
R5516/C5525
node
1.8–2.0
1.8–2.1
Q5502 Drain Bias
L5508/R5517
Node
9.0–9.3
9.0–9.3
Q5503 Gate Bias 1
R5520/C5539
node
2.0–2.2
1.4–1.9
Q5503 Gate Bias 2
R5521/C5540
node
2.0–2.2
1.4–1.9
Q5503 Drain Bias
L5510/R5523
Node
13.0–13.6
13.0–13.6
Antenna Switch Bias
Voltage 1
L5701/C5702
node
~4.7
~5.95
Antenna Switch Bias
Voltage 2
D5701/D5702
node
~4.0
~5.0
Antenna Switch Bias
Voltage 3
D5703/R5701
node
~3.3
~3.3
Содержание XTL 1500
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