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