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whitejohnny 17th November 2012 01:26 PM

Transistor Part Numbers for Q130-Q139 in a Kole QX1-3000D
Hi Folks, many thanks to all who post here; I've learned so much from everyone's contributions.

Can anybody take a peek (or if you know offhand) what the part numbers for Q130-Q139 are in a Kole QX1-3000D?

Fixed title to reflect QX1-3000D model number, my fault..
If a MOD can fix the title to reflect correct model in post #3, that would be awesome, was asleep at the wheel. Also the thread title...

Going behind a hack job, client picked it up after a month of no progress with half the parts missing, brought it to me.

Also, anybody know where to source the fans used in those amps?


Perry Babin 17th November 2012 02:09 PM

If no one can answer the question, post a photo of the board. It's likely a clone.

whitejohnny 17th November 2012 07:26 PM

pics of PH2-3000d
4 Attachment(s)
Here we go:

Perry Babin 17th November 2012 07:34 PM

Q130-138 are IRFB31N20Ds.

whitejohnny 17th November 2012 11:57 PM

Excellent, Thanks for the ID
Thanks Perry.

Does it look like something else you're familiar with?

Perry Babin 18th November 2012 02:41 AM

It's a clone of many other types of amplifiers. IF you're repairing this amp, you should replace Q124 and Q125 on the driver board, even if they appear to be OK.

whitejohnny 18th November 2012 11:15 AM

Replacing Q124 and Q125
2 Attachment(s)
Are Q124 and Q125 the drivers for the output section? Or what is their function?

There are several parts on the driver board with really bad or missing solder...

Q124 and Q125 are MPS-A42?

K, Thanks Perry!

rrae 18th November 2012 11:41 AM

yes, you should replace these by default on these driver cards. use mpsw42 for replacement and put them closer to fan

Perry Babin 18th November 2012 01:25 PM

1 Attachment(s)
Also replace Q116 with an MPSW92. Check R190 and R173. They both appear to have overheated. As was previously stated, install the transistors so that they're closer to the fan blades.

whitejohnny 19th November 2012 11:01 AM

Is the fan a standard 12volt, such as is used on a pc heatsink?
The fan was missing on this amp and at the moment I haven't another one around to check, is it a regular 12volt fan such as from a computer heatsink?

Thanks for the advice guys, I'll change the transistors and resistors. Any other parts you might recommend refreshing, or common failure points you might mention?

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