[sdiy] Lexicon Delta-T 102 schematics?

[Tom Bugs]

Thanks Mark,
Yeah, I've seen the DT-92 around - maybe some similar internals, but 
appears quite a different beast - certainly size-wise..
(the 102 is an utter beast/lump)
I've not looked into the delay cards yet, so will cross-compare with the 
PT93 when I come to it. As I say, its the PSU that is the first port of 
call... and that's way bigger than on the PT93.
Cheers, Tom

On 16/02/2016 21:56, mark verbos wrote:
> Tom,
>
> I don't have any experience with that one, but I fixed a broken Delta-T 91 last year. I think they are from the same family, so could be quite similar. In fact, I couldn't find a schematic for this thing, so I referred to a schem from a Prime Time 93. The delay itself was the same, just the mixing, routing, modulation was different (well missing) on this one. To my horror the problem was a dead DS3672N which is a super rare driver for the RAM. I got the thing working with some kind of CMOS buffer, but then hunted down the right part just to be completist. Best of luck!
>
> Mark
>
>
>
>
> On Feb 16, 2016, at 4:21 PM, Tom Bugs wrote:
>
>> Hi,
>>
>> Wondering if anyone happens to have any documentation for the old Lexicon Delta-T 102 Stereo Delay System.
>> There's a 4 page doc floating around but that only covers some strange options or something - not the important nitty gritty.
>>
>> In particular a PSU Schematic would be helpful - mine has been attacked sometime before and I won't even consider moving on to the module boards until I've sorted this..
>> (there's a missing TIP33, for example - well, I presume TIP33 as there's a still populated TIP34 next to it.. Bloody massive capacitors on the PSU!)
>>
>> Then there'll be tant-cap replacing on all the sub-boards - I've got 4xOM102-S and 1xVCO102 + the core boards.
>>
>> [as an aside - last year I got a Primetime92 off Vemia - the service manuals for that were *supreme* such detail and great engineering. And it turned out to be a relatively easy repair - it was the dreaded tants causing issues - replaced them and all started behaving nicely again]
>>
>> Any help very gratefully appreciated.
>> Tom
>>
>> -- 
>> BugBrand LTD
>> UK company No. 07199808
>> VAT No. GB 988 2629 57
>> 1 Ninetree Hill
>> BRISTOL BS1 3SB
>> United Kingdom
>> www.bugbrand.co.uk
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>

-- 
BugBrand LTD
UK company No. 07199808
VAT No. GB 988 2629 57
1 Ninetree Hill
BRISTOL BS1 3SB
United Kingdom
www.bugbrand.co.uk