Tait TM8110 Service Manual

TM8100/TM8200 Service Manual Transmitter Fault Finding (25W) 353
© Tait Electronics Limited June 2006
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 12.8):
2. If the voltage is correct, go to Step 3. If it is not, go to Tas k 2 1
.
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 12.10):
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 157. If it is not, go to Tas k 23
.
SET PWR test point: 2 to5V
gate of Q306: 2 to 5V

Tait TM8110 Specifications

General

Brand	Tait
Model	TM8110
Category	Radio
Language	English