No Speaker Audio At Auxiliary Connector; Circuitry In The Vicinity Of The Internal-Options Connector Sk102 - Tait TM9100 Service Manual

Figure 13.5 Circuitry in the vicinity of the internal-options connector SK102 (top side)
Internal-options
connector
13.3

No Speaker Audio at Auxiliary Connector

This section covers the case where the receiver operates normally but there
Introduction
is no speaker audio at the auxiliary connector. In other words, there is no
signal at pin 13 (
procedure comprises two tasks:
These tasks need to be followed by those of
Auxiliary Connector" on page 394
modulation using the auxiliary connector.
382 CODEC and Audio Fault Finding
AUD TAP OUT
Task 8: check signal from CODEC
Task 9: check LPF and buffer amplifier in CODEC circuitry
) of the connector. The fault-diagnosis
"Faulty Modulation Using
if there is also a fault with the transmit
© Tait Electronics Limited August 2005
TM9100 Service Manual