bbc master 512 keyboard acting funny

Arc/RPCs, peripherals, RISCOS operating system & ARM kit eg GP2x, BeagleBoard
Post Reply
avtovaz
Posts: 39
Joined: Wed Jan 18, 2017 5:09 pm
Contact:

bbc master 512 keyboard acting funny

Post by avtovaz » Wed May 09, 2018 1:08 pm

Just switched on the master for the first time in a while, and when i type bottom 2 rows of the keyboard dont do anything, and the top 3 rows sort of show the bottom two rows. So as in you may press 3 and you get an x...

Whats up with it? Is this common? thanks!

User avatar
danielj
Posts: 6486
Joined: Thu Oct 02, 2008 4:51 pm
Location: Manchester
Contact:

Re: bbc master 512 keyboard acting funny

Post by danielj » Wed May 09, 2018 2:54 pm

Start by unplugging it and cleaning the connectors on both ends! If it's still misbehaving it's time to start looking for broken things.

d.

avtovaz
Posts: 39
Joined: Wed Jan 18, 2017 5:09 pm
Contact:

Re: bbc master 512 keyboard acting funny

Post by avtovaz » Wed May 09, 2018 4:20 pm

ah i had taken off the conections to the board, didnt know the ones on the keyboard came off too, will take it apart and have a look!

thanks

User avatar
1024MAK
Posts: 7787
Joined: Mon Apr 18, 2011 4:46 pm
Location: Looking forward to summer in Somerset, UK...
Contact:

Re: bbc master 512 keyboard acting funny

Post by 1024MAK » Wed May 09, 2018 5:31 pm

Also check that both the connectors are correctly aligned.

Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki‬ - for answers to many questions...

avtovaz
Posts: 39
Joined: Wed Jan 18, 2017 5:09 pm
Contact:

Re: bbc master 512 keyboard acting funny

Post by avtovaz » Fri May 11, 2018 9:35 pm

conections properly aligned, the ribon cable is soldered to the keyboard end, and all conections "look" good.

The only thing i havnt said is, ages ago, one or two of the keys where not working so i sprayed the lot with electrical cleaner... I wonder if that has done something?

User avatar
1024MAK
Posts: 7787
Joined: Mon Apr 18, 2011 4:46 pm
Location: Looking forward to summer in Somerset, UK...
Contact:

Re: bbc master 512 keyboard acting funny

Post by 1024MAK » Fri May 11, 2018 11:28 pm

avtovaz wrote: The only thing i havnt said is, ages ago, one or two of the keys where not working so i sprayed the lot with electrical cleaner... I wonder if that has done something?
Depends on the chemical makeup of the "electrical cleaner"...

Next, have a good look at the tracks on the keyboard PCB.

What test gear do you have?

Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki‬ - for answers to many questions...

avtovaz
Posts: 39
Joined: Wed Jan 18, 2017 5:09 pm
Contact:

Re: bbc master 512 keyboard acting funny

Post by avtovaz » Sat May 12, 2018 5:19 pm

contact cleaner was DP-60, I have a fluke 116 multi meter, and a few other bits too, but not sure how to use them in this case really.

thanks for the reply.

avtovaz
Posts: 39
Joined: Wed Jan 18, 2017 5:09 pm
Contact:

Re: bbc master 512 keyboard acting funny

Post by avtovaz » Sun Jun 10, 2018 9:08 pm

oh right, took it apart again, and noticed when id put the 2 ribbon conectors back on, id bent a pin, its all working again now except for the delete key... Ill sort that later... But ive found the problem atlast..

Post Reply