Biasing Of Pa Driver - Set Pwr Test Point - Tait TM9100 Service Manual

If the voltage at the
Task 20 —
Biasing of
point.
PA Driver—
test point
SET PWR
1.
2.
3.
4.
5.
6.
7.
8.
9.
346 Transmitter Fault Finding (25W Radios)
test point is correct, check that at the
DRV
Check the voltage at the
SET PWR test point: 2 to5V
If the voltage is correct, go to
If the can has already been removed, go to
PAD TOP
not, go to Step 4.
Enter the CCTM command 32 to place the radio in receive mode.
Remove the can.
PAD TOP
Enter the CCTM command 33 to place the radio in transmit mode.
Check the voltage on the gate of Q306 (see
gate of Q306: 2 to 5V
Enter the CCTM command 32 to place the radio in receive mode.
If the voltage is correct, replace Q306; confirm the removal of the
fault and go to "Final Tasks" on page
test point (see Figure
SET PWR
Step 3. If it is not, go to
Figure
147. If it is not, go to
© Tait Electronics Limited August 2005
test
SET PWR
12.9):
Task 21.
Step 7. If it has
12.11):
Task 23.
TM9100 Service Manual