402 CODEC and Audio Fault Finding TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
13.2 Faulty Speaker Audio
Introduction This section covers the case where the green STATUS LED is operating
correctly and all unmute criteria are satisfied, but there is either no speaker
audio or the speaker audio is distorted. There are four tasks:
■ Task 4: check audio power amplifier
■ Task 5: check speaker outputs
■ Task 6: check ITF VOL WIP DC input signal
■ Task 7: check ITF RX BEEP IN input signal
The next section deals with the case where there is no speaker audio at the
auxiliary connector.
Figure 13.2 Circuitry in the vicinity of IC202 (top side)
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