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<blockquote data-quote="Llew" data-source="post: 680540" data-attributes="member: 175007">OK the easiest way to check the audio would be to use a PC speaker and its amplifier, you could borrow one from your PC for the duration.You'll need to fashion some kind of probe to connect to the speaker's audio lead. My lead terminates in the usual 3.5mm stereo plug. A thick wire soldered to the tip terminal of a 3.5mm chassis socket will do for the probe, and a wire with an alligator clip for connecting to the receiver's chassis can be soldered to the ground terminal of the socket.Tape it up so the socket doesn't come into contact with the components of the receiver while you're testing.You need to trace back through the LH audio path from the TV scart (pin 3), through the CXA switch chip, to the encoder.Switch your receiver on to a channel, with the PC speaker on, and probe pin 3 of the TV Scart. If no sound, go on R647 (to the right of the Scart block).If no sound, go to pin 49 of the CXA chip. This is the LH audio out to the TV scart. If no sound, go to the LH audio input pin of the chip (pin 1) and let us know if you have any audio there.</blockquote>

[QUOTE="Llew, post: 680540, member: 175007"] OK the easiest way to check the audio would be to use a PC speaker and its amplifier, you could borrow one from your PC for the duration. You'll need to fashion some kind of probe to connect to the speaker's audio lead. My lead terminates in the usual 3.5mm stereo plug. A thick wire soldered to the tip terminal of a 3.5mm chassis socket will do for the probe, and a wire with an alligator clip for connecting to the receiver's chassis can be soldered to the ground terminal of the socket. Tape it up so the socket doesn't come into contact with the components of the receiver while you're testing. You need to trace back through the LH audio path from the TV scart (pin 3), through the CXA switch chip, to the encoder. Switch your receiver on to a channel, with the PC speaker on, and probe pin 3 of the TV Scart. If no sound, go on R647 (to the right of the Scart block). If no sound, go to pin 49 of the CXA chip. This is the LH audio out to the TV scart. If no sound, go to the LH audio input pin of the chip (pin 1) and let us know if you have any audio there. [/QUOTE]

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