Hey You Guuuys!
So. A friend hooked me up with a fairly beat-up Tascam 424 MKIII Portastudio that seems to still work. Looks like tape motor/belt are in great shape, etc. Good times. I've cracked the bad boy open and it seems I have a few leaky capacitors, all apparently the same type, with "085 181 TE-" printed on the top. I'm hoping someone more knowledgeable than me about electronics (it doesn't take much 😛) can help me ID them.
Also, as seen in the second photo, are they mounted into a socket of some type?
I'd guess that any leaky capacitor needs to be replaced--is that true?
Are these leaky enough to warrant the effort (again, being a relative n00b, the effort would likely be substantial)?
All advice and direction is appreciated!
G R A Z I E
M I L L E !
→V←
So. A friend hooked me up with a fairly beat-up Tascam 424 MKIII Portastudio that seems to still work. Looks like tape motor/belt are in great shape, etc. Good times. I've cracked the bad boy open and it seems I have a few leaky capacitors, all apparently the same type, with "085 181 TE-" printed on the top. I'm hoping someone more knowledgeable than me about electronics (it doesn't take much 😛) can help me ID them.
Also, as seen in the second photo, are they mounted into a socket of some type?
I'd guess that any leaky capacitor needs to be replaced--is that true?
Are these leaky enough to warrant the effort (again, being a relative n00b, the effort would likely be substantial)?
All advice and direction is appreciated!
G R A Z I E
M I L L E !
→V←
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Can you find any markings on the sides of the capacitors? These capacitors all gotta go.
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I'm not an expert or anything but when a capacitor bleeds all over the board then it's time for replacement...
I wouldn't even turn the thing on until the mess is cleaned and the capacitors replaced.
I wouldn't even turn the thing on until the mess is cleaned and the capacitors replaced.
No markings whatsoever on the sides =\
hey yeah ugh i knooow... just didn't want it to be true. hah. hope i'm up to the task!
hey yeah ugh i knooow... just didn't want it to be true. hah. hope i'm up to the task!
Look for one of the caps that seems clean and measure the capacitance, and the supply voltage if the unit powers on. Otherwise, if you have to guess try 100uF at 35VDC (or 50VDC is it fits).
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You sure that is not glue gooped on there?
Every part on the board has a component number by it, like R449, L401, C409. What is your part designated as? When I look at it, I tend to think that is an inductor. The end does not look like a cap to me, it looks like the end of a ferrite core. Is there an "L" number next to it?
Don't even have to remove the part, measure resistance across it on the solder side of the board, does it measure very low resistance? (As an inductor would?)
Every part on the board has a component number by it, like R449, L401, C409. What is your part designated as? When I look at it, I tend to think that is an inductor. The end does not look like a cap to me, it looks like the end of a ferrite core. Is there an "L" number next to it?
Don't even have to remove the part, measure resistance across it on the solder side of the board, does it measure very low resistance? (As an inductor would?)
The circled parts don't even look like capacitors. I bet they are coils. Tape decks are full of coils to bump-up tape loss and buck bias. They may be glued for shipping solidarity; the glue drips. They'll never fail. I say leave them alone.
Totally clueless
OP, the devices in question are ferrite inductors that have been glued to the pcb during assembly. These will be perfectly ok and should not be touched, definitely do not touch any of the adjustments which are critical. It is unlikely that signal caps are dead in this kind of machine, psu caps maybe on the way out but it is highly likely that they are pefectly ok and your skill level is not sufficient to work on this machine without danger of permanent damage.
Dan.
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