Tait TM8100 mobiles Service Manual page 243

TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
6. Resolder R527 in its original position as shown in
7. Replace all cans.
8. Use the oscilloscope probe to check the difference frequency at the
502 test point (see
TP
should be:
TP502 test point: sine wave of 1.1 ± 0.2V
9. If the signal is correct, the fault has been removed; go to
Tasks" on page
replace the board and go to
Figure 9.18). The signal is
163. If the signal is not correct, the repair failed;
"Final Tasks" on page
Frequency Synthesizer Fault Finding
Figure 9.18.
SYN CDC FCL
on 1.5 ± 0.1V DC
pp
"Final
163.
and
243