Search found 12 matches

by SHZ88
Sun Apr 25, 2021 1:44 am
Forum: Z88
Topic: Has anyone figured out a way to use an external display?
Replies: 7
Views: 2393

Re: Has anyone figured out a way to use an external display?

Good evening Seeker,

I have not yet tried it out, but the following site has software you can download to your PC and use this as a gateway to a monitor.

http://privat.bahnhof.se/wb782177/z88/z88-xcon.htm

Regards
SH
by SHZ88
Thu Nov 12, 2020 6:46 pm
Forum: Sinclair Misc
Topic: Sinclair Sovereign Calculator
Replies: 4
Views: 936

Re: Sinclair Sovereign Calculator

Good evening Mark,

Great, thank you.

It is really difficult to get any information on the capacitors in the Sovereign.

Regards
Simon
by SHZ88
Wed Nov 11, 2020 10:44 pm
Forum: Sinclair Misc
Topic: Sinclair Sovereign Calculator
Replies: 4
Views: 936

Re: Sinclair Sovereign Calculator

Hello Moggy,

Many thanks for this, but I was really looking for a compents list and/or schematic.

Regards
Simon
by SHZ88
Wed Nov 11, 2020 10:21 pm
Forum: Sinclair Misc
Topic: Sinclair Sovereign Calculator
Replies: 4
Views: 936

Sinclair Sovereign Calculator

Dear All, I know this is nothing to do with the ZX World, but it is still Sinclair :D Does any one have a service manual, parts list, or circuit diagram for the Sinclair Sovereign Calculator? I have one where the battery acid has complete eroded some capacitors and the traces are also not too clever...
by SHZ88
Mon Sep 21, 2020 6:26 pm
Forum: Z88
Topic: Z88 Mains Adaptor
Replies: 4
Views: 8136

Re: Z88 Mains Adaptor

Hello Mark,

Thank you.

If you are willing to sell it,then please let me know.

Regards
Simon
by SHZ88
Sat Sep 19, 2020 11:17 am
Forum: Z88
Topic: Z88 Mains Adaptor
Replies: 4
Views: 8136

Z88 Mains Adaptor

Dear All,

Does anyone have a datasheet or circuit diagram for the Z88 Mains Adaptor?

A capacitor blew iin mine, which I have now replaced, however, there seems to be other issues, possibly with the diodes.

Regards
Simon
by SHZ88
Sat Jun 27, 2020 2:59 pm
Forum: Hardware
Topic: ZX80 Video Ouput - Diagonal Lines
Replies: 6
Views: 1288

Re: ZX80 Video Ouput - Diagonal Lines

Good aternoon Mark,

Thank you, for the confirmation.

I shall either rip a 7805 from a spare 81 I have or go to the local electronics shop and buy one, as they cost next to nothing,

I do hope the other ICs are fine :cry:

Shall keep you posted.

Regards
Simon
by SHZ88
Sat Jun 27, 2020 12:50 pm
Forum: Hardware
Topic: ZX80 Video Ouput - Diagonal Lines
Replies: 6
Views: 1288

Re: ZX80 Video Ouput - Diagonal Lines

Hello Mark, The Input to the 7805 Regulator is +12v and the output +8v, so I suspect that this is not working correctly, as I can also measure this voltage on the Z80 CPU. Or do you think the high voltage is due to a low load? Hello Heinz, The voltage is a Steady, even after some *fiddling*. :-) So ...
by SHZ88
Fri Jun 26, 2020 7:33 am
Forum: Hardware
Topic: ZX80 Video Ouput - Diagonal Lines
Replies: 6
Views: 1288

Re: ZX80 Video Ouput - Diagonal Lines

Good morning Mark, Hmm, unfortunately, I only have Access to a multi-meter, which should help with the voltage you mentioned. There is a great ZX80 repair video on YouTube, where the chap was using an oscilloscope, enabling to check the clock and video output. I shall check all the voltage drops fir...
by SHZ88
Thu Jun 25, 2020 9:18 pm
Forum: Hardware
Topic: ZX80 Video Ouput - Diagonal Lines
Replies: 6
Views: 1288

ZX80 Video Ouput - Diagonal Lines

Dear Forum, I have just purchased a ZX80 on eBay, sold as not tested. It appears to power up and when I hook it up to Channel 36 on a normal CRT, I get strong blacl diagonal lines across the screens. I have re-seated all the ICs, however, this did not seem to make much difference. The image does app...