It doesn't work? - UK Vintage Radio Repair and Restoration Discussion Forum

ITAM805 · 5th Jan 2016, 11:46 pm

A guy asked me to repair this classic 80's Boss DD2 digital delay. I think I may have spotted the fault?

Outrun_uk · 5th Jan 2016, 11:49 pm

STOMP STOMP... fizzle..... oops!!

The burning question is are you going to attempt repair?!?

Cheers,

Kev

ITAM805 · 6th Jan 2016, 12:08 am

Fool that I am Kev, I did. It worked, sort of, but not very well !

Herald1360 · 6th Jan 2016, 12:11 am

An hour or so with some tinned copper wire and PTFE sleeving should sort the electrics. Fixing the mechanics- depends on PCB mounting and space available. Strips of ERBGF epoxy glued across the break both sides top and bottom might work.

Lucien Nunes · 6th Jan 2016, 12:32 am

I had a couple of experiences with boards cracked right across; although not physically separated the tracks were all broken. One was the deflection board in a Sony PVM2130 professional monitor. My hunch was it would work when reconnected, but the loss of some ground tracks had killed a few semis where HT had got to places it shouldn't. It was a field repair in the desert, so I set it aside until a board was sent from a scrap monitor back home. Another was an ICC5 that I didn't hold out much hope for, but someone challenged me to repair the PCB. I did, and it worked fine!

Nickthedentist · 6th Jan 2016, 12:51 am

When I had too much time on my hands as a teenager, I bought a Hitachi VT-33 at a boot sale. When I got it home, it was obvious that someone had attacked the electronic tuning PCB on the top with an axe or something similar. 20 pieces at a guess. I spent days (literally) glueing it back together and bridging the tracks with tinned copper wire. It was a work of art and worked perfectly. I was delighted, until I realised that the upper and lower head drums were an interesting "gold" colour because they were so worn. It was weeks before I could bring myself to chuck the wretched thing out.

5th Jan 2016, 11:46 pm	#1
ITAM805 Nonode Join Date: Jul 2010 Location: Folkestone, Kent, UK. Posts: 2,172	It doesn't work? A guy asked me to repair this classic 80's Boss DD2 digital delay. I think I may have spotted the fault? Attached Thumbnails

5th Jan 2016, 11:49 pm	#2
Outrun_uk Heptode Join Date: Aug 2009 Location: Liverpool, Merseyside, UK. Posts: 705	Re: It doesn't work? STOMP STOMP... fizzle..... oops!! The burning question is are you going to attempt repair?!? Cheers, Kev

6th Jan 2016, 12:08 am	#3
ITAM805 Nonode Join Date: Jul 2010 Location: Folkestone, Kent, UK. Posts: 2,172	Re: It doesn't work? Fool that I am Kev, I did. It worked, sort of, but not very well ! Attached Thumbnails

6th Jan 2016, 12:11 am	#4
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: It doesn't work? An hour or so with some tinned copper wire and PTFE sleeving should sort the electrics. Fixing the mechanics- depends on PCB mounting and space available. Strips of ERBGF epoxy glued across the break both sides top and bottom might work. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

6th Jan 2016, 12:32 am	#5
Lucien Nunes Rest in Peace Join Date: Apr 2008 Location: London, UK. Posts: 2,508	Re: It doesn't work? I had a couple of experiences with boards cracked right across; although not physically separated the tracks were all broken. One was the deflection board in a Sony PVM2130 professional monitor. My hunch was it would work when reconnected, but the loss of some ground tracks had killed a few semis where HT had got to places it shouldn't. It was a field repair in the desert, so I set it aside until a board was sent from a scrap monitor back home. Another was an ICC5 that I didn't hold out much hope for, but someone challenged me to repair the PCB. I did, and it worked fine!

6th Jan 2016, 12:51 am	#6
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,840	Re: It doesn't work? When I had too much time on my hands as a teenager, I bought a Hitachi VT-33 at a boot sale. When I got it home, it was obvious that someone had attacked the electronic tuning PCB on the top with an axe or something similar. 20 pieces at a guess. I spent days (literally) glueing it back together and bridging the tracks with tinned copper wire. It was a work of art and worked perfectly. I was delighted, until I realised that the upper and lower head drums were an interesting "gold" colour because they were so worn. It was weeks before I could bring myself to chuck the wretched thing out.