Wanted - BOM or Schematic for Numark IDJ2 to identify U29 and U30

[MeToo2]

Friend of mine has blown up his Numark IDJ2 mixer. U29 and U30 have burned out. Unfortunately we can't discover what chips they are/were..... Does anyone have either a bill of materials or a schematic so that he can find out what to buy? Already contracted Numark. No reply as yet. He would rather not buy a whole replacement unit just for a couple of output driver chips if that's all they were.

 

[BigBen]

Hello MeToo,

The parts you are looking for are "4556" from " JRC".
It are standard audio opamps, nothing special. Easy to get. There are probally other brands as well, doesn't need to be JRC, but well, Numark uses JRC.
I have an iDJ2 with a lot of noise on the outputs, got all the pcb's apart.
Found your question while searching for a schematic . Hope you got your answer.

Regards,
Benjamin The Netherlands

 

[MeToo2]

Hello MeToo,

The parts you are looking for are "4556" from " JRC".
It are standard audio opamps, nothing special. Easy to get. There are probally other brands as well, doesn't need to be JRC, but well, Numark uses JRC.
I have an iDJ2 with a lot of noise on the outputs, got all the pcb's apart.
Found your question while searching for a schematic . Hope you got your answer.

Regards,
Benjamin The Netherlands

Fantastic news. Thanks! FYI I drew a complete blank on this query everywhere else and the original chips were unreadable by his tech. One last question: my mate lives a long way from anywhere. Can you confirm if these are standard 8 pin through hole = DIP or surface mount = SOP? I presume surface mount but it would nice to confirm. Hartstikke bedankt en fijne dag verder

 

[Alexander]

It is really NJM4556, but the specific distinction is high output current (70 mA maximum).
For this reason these chips are often used for headphone output circuitries.

Direct replacement is M5216 manufactured by Mitsubishi.

NJM4580 manufactured by JRC or AD8512 manufactured by Analog Devices
(both have Iout max = 50mA) may be suitable replacement as well.

Good luck

 

[MeToo2]

It is really NJM4556, but the specific distinction is high output current (70 mA maximum).
For this reason these chips are often used for headphone output circuitries.

Direct replacement is M5216 manufactured by Mitsubishi.

NJM4580 manufactured by JRC or AD8512 manufactured by Analog Devices
(both have Iout max = 50mA) may be suitable replacement as well.

Good luck

Thanks. Found some SMD sop8 4580's and will give those a try. These shouldn't have to drive a low impedance headphone load so the slightly reduced drive current and lower large-voltage-swing bandwidth of the 4580 should be OK (I hope) Won't cost much to try and shouldn't do any harm. Otherwise might have to build an external power amp, because the original parts seem impossible to find in this format (DIP is available but not SMD).

 

[djtony]

Hi everyone

I need you guys knowledge about the idj2 i have my idj2 for 4 years now and recently i have problems with the buttons i have to press it hard for it to respond so i replaced the tact switches with new ones its all good but my problem is when i try to boot up the idj it will load up and once i attach my ipod the load botton wont function, is there someone who can send me a picture of the wiring connections inside please please please

Thanks
Tony

 

[MeToo2]

Hi everyone

I need you guys knowledge about the idj2 i have my idj2 for 4 years now and recently i have problems with the buttons i have to press it hard for it to respond so i replaced the tact switches with new ones its all good but my problem is when i try to boot up the idj it will load up and once i attach my ipod the load botton wont function, is there someone who can send me a picture of the wiring connections inside please please please

Thanks
Tony

Sorry I can't help: I never got the original schematics, and the unit I had is now located far away. Good luck.