Tait TM8100 mobiles Service Manual page 228

Task 29 —
Repair PLL feedback
228 Frequency Synthesizer Fault Finding
If both the maximum and minimum VCO frequencies are correct, then the
PLL feedback is suspect.
1. Resolder R542 in position (see
2. Remove the
VCO BOT
3. Replace the components L510 (see
(see Figure 9.14).
Note
On A4 band radios there is no L510. Replace L5010 instead.
4. Confirm that the fault in the radio has been removed. If it has, go to
"Final Tasks" on page
"Final Tasks" on page
Figure 9.14).
can.
Figure
163. If it has not, replace the board and go to
163.
© Tait Electronics Limited November 2007
9.15) and IC503
TM8100/TM8200 Service Manual