May 25, 2005 6881096C74-B
5-62 Troubleshooting Charts: Flowcharts
5.6.48 RF Power Amplifier (RFPA)—No or Low TX Power Output (700–800 MHz)—
Part 5 of 5
Table 5-7. RFPA DC Voltages
Description Location Voltage (Vdc)
A+ = 13.6 Vdc
U5501, VD1 VN_B6503 9.0–9.3
U5501, RFOUT VN_B6504 9.0–9.3
Q6520 Gate Bias VN_B6520 2.0–2.2
Q6520 Drain Bias L6521/R6526
Node
13.0–13.6
Q6540 Gate Bias VN_B6540 3.5–3.7
Q6541 Gate Bias VN_B6541 3.5–3.7
Q6540/Q6541
Drain Bias
L6542/R6544
Node
13.0–13.6
Antenna Switch Bias
Voltage 1
VN_B6563 ~5.3
Antenna Switch Bias
Voltage 2
VN_T6701 ~1.6
Antenna Switch Bias
Voltage 3
D6701/D6702
Node
~0.8
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