Tait TM8000 Series

220 Diagnosis of Faults on Main Board TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Figure 9.22 Test points and components of the power-control circuitry
Table 9.7 Voltages at IC303 at maximum power (40 W)
Frequency band Frequency (MHz)
Voltage (V)
Pin 9 Pin 5 (
FWD PWR)
B1 136
155
174
2.2 ± 0.1
2.3 ± 0.1
2.5 ± 0.1
1.9 ± 0.1
2.1 ± 0.1
2.3 ± 0.1
D1 216
241
266
2.2 ± 0.1
2.2 ± 0.1
2.3 ± 0.1
4.3 ± 0.1
4.3 ± 0.1
4.7 ± 0.1
H5 400
435
470
3.4 ± 0.1
3.8 ± 0.1
4.0 ± 0.1
3.3 ± 0.1
3.7 ± 0.1
3.9 ± 0.1
H6 450
490
530
3.9 ± 0.1
4.2 ± 0.1
4.7 ± 0.1
3.8 ± 0.1
4.1 ± 0.1
4.6 ± 0.1
DIRC TOP CAN
IF TOP CAN
VCO TOP CAN (UHF ONLY)
SET_PWR
TEST POINT