Tait TM8100 mobiles Service Manual page 276

Task 3 —
9V Power Supply
276 Transmitter Fault Finding (>25W)
If the supply from the power connector is correct, check the 9V DC supply.
Enter the CCTM command 326 1 to set the transmitter power level
1.
very low.
Enter the CCTM command 33 to place the radio in transmit mode.
2.
3. Measure the supply voltage between the 9
test point (see
GND
supply 9V0 TX: 9.0 ± 0.5V DC
Enter the CCTM command 32 to place the radio in receive mode.
4.
5. If the supply measured in
"Transmitter RF Power" on page
IC601 and the associated switching circuitry Q603 are suspect; go to
Task 3 of "Power Supply Fault Finding" on page
V
Figure 11.4).
Step 3 is correct, go to
278. If it is not, the 9V regulator
© Tait Electronics Limited November 2007
0 test point and the
TX
Task 4 in
174.
TM8100/TM8200 Service Manual