Question about Mackie Tapco Th15a Thump Active Loudspeaker

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Pcb 0021367-00 Need a new power board for my Tapco Thump: pcb 0021367-00 Can't find any links on the net. Any ideas anyone?

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My TH-15A starts making VERY loud crackling noises after a few minutes of being turned on. It does not matter if an XLR cable is plugged in or not, and the volume control does not change the volume of the...


buy a canister cold spray and spray on some active components if the noise begins You have a thermical failure in a component on the board can be faltering resistorcircuits or resoldering some active components.

May 08, 2016 | Mackie Tapco Th15a Thump Active...

1 Answer

No power in Mackie TH-15A


i) I assume the fuse you mentioned was in the mains plug - did you also check the fuse in the TH15A mains input socket? This is accessed by pulling out the tab in the bottom section of the socket (below the centre pin). This is a 3.15Amp antisurge fuse, 20mm type.

ii) If this fuse has blown, then replace it & all may be well ...... but if it blows again, then move to step iii).

iii) With mains disconnected, remove rear panel (outer screws) & check the power supply PCB for damaged components, especially R111 & R112 (100ohms). If the latter are burnt or open circuited, then the amplifier module may have blown.

regards, Dave

Aug 20, 2014 | Mackie TH-15A Active DJ Powered THUMP...

3 Answers

My line 6 lowdown 750 keeps cutting out when i play a low b on my bass


Protective circuits kicking in. You may be overdriving the preamp to a clipping condition the amp sees as a problem. If it is under warranty, contact Line 6 and see if this is normal for this amp. It should not be, but you never can be sure.

Apr 26, 2012 | Line 6 Music

1 Answer

The green light flashes with no fan noise at all or any sound


You have a bad power circuit board. if you are tech-inclined,you can open the mixer's rear cover and check for bulging/leaking capacitors on the board. they will need to be replaced. Or just order a new PCB from Peavey. Rodger, in tech support, will be happy to help.

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1 Answer

Hi, I need the pmp5000 schematic or service manual. Because my mixer smps is faulty.. (On the smps pcb following parts are problem : T12 - D24 and 25? R11 open - D6 and D9 are short - TOP221 ? ) Best...


Oh yeah... know them well The IGBT transistors fail, the sand coated resistors blow open... replace as a pair. The driver transistors get blown... 2SA1020's and 2SC2655-Y's. One or more of the gate speedup diodes for the IGBT's get blown. The switching reg chips, IR2153 is usually gone. and more...

Here is your service manual: http://elektrotanya.com/behringer_europower-p0569_hca2400_sps1000_dpx_pmp-1280s_5000_sch.pdf/download.html

Scroll down to "get manual" and click to download. Ignore other "download links".

You will likely find that one of the power amps has shorted... been there, done that several times. Usually the channel A (rearmost) power amp shorts takeing out the 9140 Mosfets and other parts. Often an internal short between an interior and upper layer of the amp circuit board is the fault that causes all this. Use a light bulb (150 watt) in series with the power input when testing after repair. Use an isolation transformer when working on the supply for personal safety. When supply is running again, discharge the 70 volt source caps before plugging onto the amp to avoid welding arcs at the connectors. I have seen the supply hold charge for several days.

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1 Answer

I bought a factory refurbished xga-3000 gemini amplifier and conected it to my behringer mixer expecting a thump. but it barely sounded like a sound of earphone at maximum volume. I read power supply to...


A large amp like this likely has protection circuit (probably a relay) that doesn't connect the speakers until the amp is stable and balanced. You relly need the schematics for the amp.

Jun 21, 2011 | Gemini Sound Products GEMINI XGA 3000 3000...

2 Answers

TH-15A won't make sound. Comes on, then flashing front light


This probably means there is a failure and the internal protection circuits have activated. It will probably have to go to a shop for repair.

Jan 03, 2011 | Mackie ProFX8 / TH-15A PA Package

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