Re: 746 wiring diagram needs some explaining please
In unmodified form red and white are the line pair. Green is there to provide an easy means of connecting an extension bell.
Ringing path A leg, BT8, BT4, BT3, T17, T16, Bell, T4, T5, T6, T7, C1/C2, T9, T8, Red, BT1, BT5, B leg.
MIC is microphone originally a carbon type. TL is the earpiece a rocking armature type.
The semi-circle is the bell with a '~' to denote AC.
The pulsing dial springs are 4 and 5. All other dial springs are OFF-NORMAL which indicates they operate as soon as the dial is turned to wind it up. D1 and D2 for example short the earpiece during dialling.
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Graham. Forum Moderator
Reach for your meter before you reach for your soldering iron.
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