Tait TM8100 mobiles Service Manual page 421

Task 16 —
Check CODEC 2
Device
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
If the DC offset measured in
the auxiliary connector, check the CODEC 2 device.
1. Remove the
CDC TOP
2. Check the voltage at both ends of R241 (see
R241: 1.5V DC at both ends
3. If the voltages are correct, go to
4. Check for and repair any soldering faults around IC205, or else
replace IC205 (see
5. Confirm the removal of the fault and go to
page 163. If the repair failed, replace the board and go to
Tasks" on page
6. Remove R241.
7. Check the voltage at pin 3 of IC205 (see
pin 3 of IC205: 1.5V DC
8. If the above voltage is correct, go to
board and go to
9. Check for and repair any soldering faults around R241 and IC205
(see Figure 13.10).
10. Confirm the removal of the fault and go to
page 163. If the repair failed, replace the board and go to
Tasks" on page
Task 15 is incorrect but there is no fault with
can.
Step 4. If they are not, go to
Figure 13.10).
163.
Step
"Final Tasks" on page
163.
CODEC and Audio Fault Finding
Figure 13.10):
"Final Tasks" on
"Final
Figure 13.10):
9. If it is not, replace the
163.
"Final Tasks" on
"Final
Step 6.
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