Re: What Is This Component?

2017-07-23 Thread allison via cctalk
gt;> Sent: 23 July 2017 23:05 >> To: General Discussion: On-Topic and Off-Topic Posts >> <cctalk@classiccmp.org> >> Subject: What Is This Component? >> >> I am trying to repair my DECstation 220 after a battery leak, and making > some >> reasonable prog

Re: What Is This Component?

2017-07-23 Thread allison via cctalk
On 07/23/2017 06:09 PM, Mattis Lind via cctalk wrote: >> >> >> It is QZ1 in the following picture: >> https://rjarratt.files.wordpress.com/2017/07/wp_20170723_22_38_20_pro.jpg >> >> It is a 32768 Hz crystal / resonator. > /Mattis > \ No question about it a 32768Hz crystal. Likely used to

RE: What Is This Component?

2017-07-23 Thread Rob Jarratt via cctalk
> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Adrian > Graham via cctalk > Sent: 23 July 2017 23:11 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org> > Subject: Re: What Is This Component?

RE: What Is This Component?

2017-07-23 Thread Dave Wade via cctalk
att > via cctalk > Sent: 23 July 2017 23:05 > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk@classiccmp.org> > Subject: What Is This Component? > > I am trying to repair my DECstation 220 after a battery leak, and making some > reasonable progress. I have

Re: What Is This Component?

2017-07-23 Thread Adrian Graham via cctalk
> On 23 Jul 2017, at 23:05, Rob Jarratt via cctalk wrote > I am trying to repair my DECstation 220 after a battery leak, and making > some reasonable progress. I have reached a component that is unknown to me, > so I don't know how it is supposed to behave. It is connected

Re: What Is This Component?

2017-07-23 Thread Mattis Lind via cctalk
> > > > It is QZ1 in the following picture: > https://rjarratt.files.wordpress.com/2017/07/wp_20170723_22_38_20_pro.jpg > > It is a 32768 Hz crystal / resonator. /Mattis

What Is This Component?

2017-07-23 Thread Rob Jarratt via cctalk
I am trying to repair my DECstation 220 after a battery leak, and making some reasonable progress. I have reached a component that is unknown to me, so I don't know how it is supposed to behave. It is connected to the inputs of a CMOS NAND gate, where I measure a steady voltage of 1.8V, but the