Search found 16 matches
- Fri May 13, 2022 11:17 pm
- Forum: Welcome Area
- Topic: White screen on a ZX81
- Replies: 9
- Views: 3099
Re: White screen on a ZX81
Yes I agree, my LCD TV is fairly old and most likely won't work with this ZX81 I just did the one NPN transistor a 2222A, with one 100 ohm resistor off the E of the transistor connected to the center of the RCA and then to ground, worked very well on my other two, but not this bone stock one. The UL...
- Fri May 13, 2022 6:36 am
- Forum: Welcome Area
- Topic: White screen on a ZX81
- Replies: 9
- Views: 3099
Re: White screen on a ZX81
Hi all, I finally got back to working on this problem, and I can not understand why it only showing a white screen with no K prompt. I done the same video mod that I used on my other ZX81, and my TS1000 and they both work on my LCD TV. I got to thinking that the mod is for a composite monitor, I got...
- Fri May 13, 2022 6:15 am
- Forum: Welcome Area
- Topic: Another fellow from Canada
- Replies: 13
- Views: 4151
Re: Another fellow from Canada
Hello and welcome, I am also a fellow Canadian, from Belleville ON. A great forum for all things Sinclair, really knowledgeable members, they have been a great help to me.
- Fri May 13, 2022 6:05 am
- Forum: Welcome Area
- Topic: Hello from Vulcan, Alberta, Canada!
- Replies: 3
- Views: 1354
Re: Hello from Vulcan, Alberta, Canada!
Hello fellow Canuck. I am from Belleville Ontario, this is a great forum to get answers on everything Sinclair.
- Fri Jan 28, 2022 8:46 pm
- Forum: Hardware
- Topic: Improving Timex/Sinclair Tape Loading
- Replies: 164
- Views: 90374
Re: Improving Timex/Sinclair Tape Loading
Hi Daniel,
Thank you for the link and picture. I have them in my cart at Digikey. Take care.
Cheers.
Richard.
Thank you for the link and picture. I have them in my cart at Digikey. Take care.
Cheers.
Richard.
- Mon Jan 24, 2022 8:25 pm
- Forum: Hardware
- Topic: Improving Timex/Sinclair Tape Loading
- Replies: 164
- Views: 90374
Re: Improving Timex/Sinclair Tape Loading
Yes these look correct as far as the pin placement, but not sure if dimensions are correct. I sent a messages to the designer asking him/her what and who the makes the PB203G jacks. Thanks.
Cheers.
Richard.
Cheers.
Richard.
- Mon Jan 24, 2022 5:56 pm
- Forum: Hardware
- Topic: Improving Timex/Sinclair Tape Loading
- Replies: 164
- Views: 90374
Re: Improving Timex/Sinclair Tape Loading
Thanks for the reply. I looked at those ones, but the pins do not match the holes in the PCB. I got the part number off the board schematic, from the ZIP files. I looked at PJ-324 and it seems to have the correct pin placement on them, but can't get here in Canada, or the US. If I knew who's part nu...
- Mon Jan 24, 2022 4:29 am
- Forum: Hardware
- Topic: Improving Timex/Sinclair Tape Loading
- Replies: 164
- Views: 90374
Re: Improving Timex/Sinclair Tape Loading
Quick question on the ZX81 cassette signal cleaner. I am trying to find the PG203J cable jacks? I live in Canada and can get the pcb build thru Osh Park, and all the componets except for the jacks. Thanks in advance.
Cheers.
Richard.
Cheers.
Richard.
- Wed Jan 19, 2022 6:46 am
- Forum: Welcome Area
- Topic: Hello from Canada
- Replies: 7
- Views: 2553
Re: Hello from Canada
I finally got a vLA81 ULA for my TS1000 and I installed it. I installed the membrane on the pcb, the installed it in its case. I then hooked up the computer to the monitor and plugged in the power, and up came the K as before. I then tried a couple of keys, but still no response? I was somewhat dism...
- Fri Jan 14, 2022 7:09 pm
- Forum: Welcome Area
- Topic: White screen on a ZX81
- Replies: 9
- Views: 3099
Re: White screen on a ZX81
Hi Mark,
A13 is pulsing very rapidly, showing L only
ROM pin 20 is pulsing showing H & L The ROM is a Motorola ZCM38818P date 82 40
My old camera is only 5MP but works great for Ebay, I hope the pictures come out OK for you.
Cheers.
Richard.
A13 is pulsing very rapidly, showing L only
ROM pin 20 is pulsing showing H & L The ROM is a Motorola ZCM38818P date 82 40
My old camera is only 5MP but works great for Ebay, I hope the pictures come out OK for you.
Cheers.
Richard.