14.10 Speaker Faulty - Tait TM8100 mobiles Service Manual

14.10 Speaker Faulty

440 Fault Finding of Control Head with Graphical Display
The two speaker lines (SPK+ and SPK–) are connected to the speaker
connector (J104) which is connected to the control-head connector (J103)
through two ferrite beads (L105 and L106).
Figure 14.13 Circuit diagram of the speaker circuitry
Control-Head
Connector
SPKR+
18
J103
SPKR–
17
If the speaker functions only intermittently or the audio level is low:
1. Check the continuity from the speaker connector J104 to pin 18
( ) and pin 17 (
SPK+
2. Inspect E105 and E106.
3. Replace the speaker.
4. If there is still a fault, go to
E105
E106
) of the control-head connector J103.
SPK–
"Volume Control Faulty" on page
© Tait Electronics Limited November 2007
Speaker
Connector
1
J104
2
442.
TM8100/TM8200 Service Manual