Search found 92 matches

by bagpuss22
Sat Oct 07, 2017 2:44 am
Forum: General QL Chat
Topic: Bad evenings repairs
Replies: 10
Views: 3620

Bad evenings repairs

I had good intentions tonight. I had a CST Thor with an iffy QL motherboard, so I bought a new motherboard from Rich. It sat there for a few months but today I decided to take action. I took off the unwanted power regulators from the new board and put them on the old board. Put the new board in the ...
by bagpuss22
Fri Oct 06, 2017 6:54 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

ON the board removed today I added the regulators I took off the board I was installing to the Thor. I have also noticed on this Issue 5 board I removed, that memory ICs 3, 5, 9 and 10 are getting very hot, +60 degrees within seconds. The screen seems to be constantly changing with different pattern...
by bagpuss22
Fri Oct 06, 2017 6:14 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

Starting to loose the will to live on this one...... :cry: Rich sent me a working issue 5 board which I got around to fitting today. Had to remove the power connector, IC35 (7805), IC36 and IC37 (regulators) as power is derived from the Thor.. And! All I get is a black screen! On RF I cannot get a s...
by bagpuss22
Thu Aug 10, 2017 4:22 pm
Forum: Hardware
Topic: Anyone with a psu for Microperipherals Floppy Interface?
Replies: 45
Views: 16951

Re: Anyone with a psu for Microperipherals Floppy Interface?

Hi there, I am not to convinced about that pin-out as it talks about 18V AC and 11V AC where our PSU has a 15V AC and a 9V DC. Thanks BP Here you go... Micro-peripherals power.JPG The post by Bloodnok earlier in this thread should be what you are looking for. Unfotunately I don't have a multimeter t...
by bagpuss22
Thu Aug 10, 2017 12:31 am
Forum: Hardware
Topic: Anyone with a psu for Microperipherals Floppy Interface?
Replies: 45
Views: 16951

Re: Anyone with a psu for Microperipherals Floppy Interface?

Would it be possible for you to show the DIN connector and measure what voltage is on what pin?

I would like to fit a DIN plug to mine but I am not sure what is on what pin.

Thanks

Russ
by bagpuss22
Sat Jun 24, 2017 2:08 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

Hi Bob, Apologies that should read: track cut on negative part of C37 -> C38! On your issue 5 board are pins 1 and 2 of HBC1 and HBC2 wire-linked? Is that for Microdrive usage? I know the resistor on mine allows 9v to be passed to the Microdrive circuits. Russ Hi Russ, I checked again and the C37/3...
by bagpuss22
Fri Jun 23, 2017 10:46 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

Hi Bob,

Maybe you could pop up a photo of the area around the power connector so we can have a look?

Many thanks

Russ
by bagpuss22
Fri Jun 23, 2017 6:22 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

Anyone seen this before? (...) IC35 (7805) missing. IC37 (7812) missing. Big resistor goes from IC37 to L5 which has been lifted one end. Track cut on negative part of IC37 -> IC38. I was planning on replacing with a board which is a standard Issue 5. I've compared your board with my issue 5 Thor, ...
by bagpuss22
Fri Jun 23, 2017 12:54 am
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

As Nasta loves telling me: The QL was not designed to be backfed power. Removal of the 7812 and 7805 prevents the release of the magic smoke when you have power at the output and nothing on the input. The Thor doesn't use the microdrives so there's no need to ensure power there. From my recollectio...
by bagpuss22
Thu Jun 22, 2017 12:19 am
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 77
Views: 27991

Re: CST Thor 1

Anyone seen this before? https://s15.postimg.org/mzyhbo9wb/IMG_2425.jpg This is on my Thor which provides its power via the expansion connector. Unfortunately this board is now failing with pretty patterns and noise, but the ROMS are OK. IC35 (7805) missing. IC37 (7812) missing. Big resistor goes fr...