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- Path: news.delphi.com!usenet
- From: Jim <mij67@delphi.com>
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Problems with Power-Supply
- Date: Mon, 29 Jan 96 20:13:35 -0500
- Organization: Delphi (info@delphi.com email, 800-695-4005 voice)
- Message-ID: <pLNKYVn.mij67@delphi.com>
- References: <4ea8b9$gv4@ci.ist.utl.pt>
- NNTP-Posting-Host: bos1b.delphi.com
- X-To: RUI PEDRO DOS SANTOS DA SILVA DE OLIVA <l38260@alfa.ist.utl.pt>
-
- > I have a Commodore Amiga 500 and my power-supply has broken.
- >I have oppened it and found an optical coupler wich is out of order (I pre
- >it is there to prevent the supply from working without being connected to
- >computer.)
-
- If your supply has an opto-isolator in the circuit, it is probably used to
- provide isolated feedback to the control circuit on the primary side. This
- part of the circuit is absolutely critical and will not function with out it.
- This feedback signal controls the PWM on primary and is responsible for
- controlling and regulating the output channel(s).
-
- Jim
-