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Old 4th Dec 2020, 10:46 pm   #4
Dave Moll
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Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
Default Re: 746 wiring diagram needs some explaining please

I'm not sure whether this is what you're asking, but (as indicated by the "A" and "B") the line connects between T8 ("B" leg) and T18 ("A" leg). The incoming wires are normally coloured red and white respectively.

If the block terminal external connection isn't present between T18 and T17, they need to be strapped internally.

If you wish to use the master socket capacitor for the ringer, remove the strap between T6 and T7 and connect the ringer wire (normally blue) to T6.

"MIC" and "TL" are indeed the microphone (transmitter) and earpiece (receiver) respectively. The item you describe as "1k S" is the bell. It is on its side so the symbol is an indication that the bell is AC,
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Last edited by Dave Moll; 4th Dec 2020 at 10:46 pm. Reason: As usual beaten to it while I was composing my post!
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