Re: TRS80 Model 4P CRT contrast fail

2017-11-24 Thread Brent Hilpert via cctalk
On 2017-Nov-23, at 5:07 PM, Adrian Graham via cctalk wrote: >> On 23 Nov 2017, at 21:18, Brent Hilpert via cctalk >> wrote: >> ... >> You might check the contrast control. >> I can't find the actual schematic for the contrast control connections, but >> I 'm guessing the ends are connected acros

Re: PC diskette drives in a HP 9122C was WTB: HP-85 16k RAM Module and HPIB Floppy Drive

2017-11-24 Thread Paul Berger via cctalk
On 2017-11-24 2:02 AM, Chuck Guzis via cctalk wrote: On 11/23/2017 07:02 PM, Paul Berger via cctalk wrote: I have managed to get 2 PC type drives working in a 9122C they are two different versions of the YE Data YD-702D.  The important thing is the drive needs to provide a ready signal, disket

Re: TRS80 Model 4P CRT contrast fail

2017-11-24 Thread Tony Duell via cctalk
On Fri, Nov 24, 2017 at 8:41 AM, Brent Hilpert via cctalk wrote: > On 2017-Nov-23, at 5:07 PM, Adrian Graham via cctalk wrote: >>> On 23 Nov 2017, at 21:18, Brent Hilpert via cctalk >>> wrote: >>> ... >>> You might check the contrast control. >>> I can't find the actual schematic for the contras

Re: TRS80 Model 4P CRT contrast fail

2017-11-24 Thread Adrian Graham via cctalk
> On 24 Nov 2017, at 17:23, Tony Duell via cctalk wrote: > > On Fri, Nov 24, 2017 at 8:41 AM, Brent Hilpert via cctalk > wrote: >> On 2017-Nov-23, at 5:07 PM, Adrian Graham via cctalk wrote: On 23 Nov 2017, at 21:18, Brent Hilpert via cctalk wrote: ... You might check the