🚀 go-pugleaf

David Longley wrote:
> 
> I  have  an odd problem with an Internal V34 fax  modem,  a  half
> length, V1428VQH dynalink I think.
> 
> The  modem  is recognized by the PC in DOS, and  responds  to  AT
> commands  with OK and passes diagnostics. The problem is that  it
> never picks up the line and always responds with NO DIALTONE.
> 
> I've swapped leads and suspect a problem in the analogue side  of
> the board, maybe a relay?
> 
> Anyone  prepared to have a look at the thing for me,  or  suggest
> what it might be? I can't afford to get it repaird, these tyhings
> too cheap for the labour costs these days - but it seems a  shame
> to junk it when all the digital side passes OK. Will pay  postage
> costs of course.
> --
> David Longley
> 
> Longley Consulting                                                  London, UK
> Behaviour Assessment & Profiling Technology,
> Research, Data Analysis and Training Services,
> Small IT Systems                                http://www.longley.demon.co.uk
Ive found several of these problems to be an open transformer at the RJ
plug side. Fine windings (should measure about 50 ohms on both primary
&  secondary. This usually happens after an electrical storm.
Transformers used to be readily available. Ive used transformers from
older modems that have close to the same resistance.
				ED