Tait TM9100 Service Manual

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

Tait TM9100 Specifications

General

Brand	Tait
Model	TM9100
Category	Radio
Language	English