TC Electronic Classic 450 - owners, help me!

i, sure one of the techs here will be able to id those chips for you stan.
good luck

 

Hmm.... Not sure if its applicable but TC did a recall on some amps that had an issue with mediocre parts that could cause a shock. Maybe check out the TC thread and see if its mentioned or if that could be the cause.

 

2 and 3 could be current sense resistors, the 8 pin no clue. possibilities about 400,000 for these. Someone crack theirs open and take a high res pic.

 

Wish I had access to one or a schematic to help you (no pay needed). I can't believe no TC owner has stepped up to the plate yet to help?

 

Email TC. They probably aren't going to give you the schematic but should ID the parts and suggest what else to look at to avoid PassinW's repeat failure scenario. If you're lucky they might send you a new board if it was a recall. Their rep could use a boost.

Is the board in question photographable by taking off the access panel? I doubt any TB'er is going to take your 15 bucks for helping you out, it's not the TB way.

 

i wouldn't call that helpfull.
come on guys. help this fella out. please? pretty please?

 

The forum rep is out of his remit. You'll have to go higher in the food chain.

What you have to appreciate is these new amps aren't easy fixes. Without intimate knowledge you'll be about as capable as a gorrilla with a screwdriver. Trouble is the schematic gives away hard won IP. Rock and hard place, stuck between.

Just getting the chip numbers isn't enough without high level help. The burned up stuff could easily be only symptomatic of the real source of smoke loss. If you're lucky you can get a TC tech online with your tech , else you got no hope.

 

If you have to call them - use this dialaround # - 101 6868. You dial that and then dial like you are calling overseas. The per minute rates are really low and there is no minimum. It just shows up on your phone bill as a charge. We've used it for years.

Good Luck with that.

By the way - the advice is correct - the burned parts are not the problem - they are the result of the problem.

 

Sorry OP but I really feel you are wasting your time. If you want the amp repaired do as TCE advised and send it in for service. When you get it back it will be repaired and all updates performed. Possibly even replaced with a new unit. Sometimes you have to go with the flow and not try to swim upstream.

 

And???

You want the amp repaired or what? Sending the amp back to the manufacturer is the obvious choice for your unit. It's that or buy a different amp.

 

Well I can make out Q8 for #3, maybe the component ID is on the other side of the board for #1 and #2. With those ID's you could call a tech.

 

For an Op-amp to look like that, something has gone catastrophically wrong with the amp. I fear that the chips are only the tip of the iceberg. I think that in all likelihood TCE service will simply replace the entire board. It's the easiest, quickest and cheapest route for them to follow. This means, in essence, that they return a new amp to you.

As a thought, did you perhaps use the DI with a mixer that had phantom power enabled??