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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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6th Oct 2014, 10:43 am | #21 |
Triode
Join Date: Apr 2010
Location: Sleaford, Lincolnshire, UK.
Posts: 48
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Re: GPO 746 No Dial Tone
Thank you..that's a useful diagram.
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6th Oct 2014, 11:30 pm | #22 | |
Triode
Join Date: Apr 2010
Location: Sleaford, Lincolnshire, UK.
Posts: 48
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Re: GPO 746 No Dial Tone
Quote:
Is there a particular area that I need to be looking at with the no dial tone fault? What are C1/C2 & C3? Should I be getting any readings across these? Many thanks. |
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14th Oct 2014, 6:13 pm | #23 |
Triode
Join Date: Apr 2010
Location: Sleaford, Lincolnshire, UK.
Posts: 48
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Re: GPO 746 No Dial Tone
Any further suggestions or should i just call it a day & scrap it?
Many thanks. |
14th Oct 2014, 6:18 pm | #24 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,820
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Re: GPO 746 No Dial Tone
It's difficult to diagnose this kind of fault remotely.
You could try bypassing the regulator section by soldering-in links which short-circuit each of the little bulbs. If this is not successful, don't scrap it. Put it to one side. It may yield useful parts for a repair one day, or you might find the fault when you become more experienced with this kind of thing. If you really don't want it, offer it here. Someone will have it, I'm sure. N. |
14th Oct 2014, 6:23 pm | #25 |
Triode
Join Date: Apr 2010
Location: Sleaford, Lincolnshire, UK.
Posts: 48
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Re: GPO 746 No Dial Tone
Thanks Nick.
Soldering for me is a big no no! That's one of those things that I never seem to get any better at with practice! I'll put the board to one side for now. Thanks for all your help. |