TB8100 Service Manual Power Amplifier Fault Finding 159
© Tait Electronics Limited September 2006
Table 8.2 Test point voltages on the 6W board
Test
Point Pin Pin Name Voltage Notes
SK101 1 & 4 GND ground
2 & 3 +28V-FILT1 26V to 30V filtered supply
SK102 1 POWER-CONTROL-CONT <0.5V analogue voltage
2 RF detect <0.8V RF drive present, +11dBm
3 PA-KEY-COAX >4.0V logic level
4 driver temperature digital digital signal, 0V and 5V
SK103 1 standby <0.5V logic level
2 driver current <0.05V current = measured voltage ÷ 2
3 DRIVER-BIAS-CONT <0.05V typical analogue voltage
4 +10V-SWITCHED-CONT 0.05V 10V regulated supply to 6W board
TP101 DRIVER-BIAS-CONT 2.9V to 3.4V
TP206 PIN-BIAS 2V to 2.5V
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