How to connect a Tascam DX-4D to TEAC A-3440, help!

  • Thread starter Thread starter fellwinter
  • Start date Start date
fellwinter said:
Hi, I am starting to think it might be a bad unit too. :(
Click to expand...
Sadly, I think it is a defective unit.

How you described the dbx channel lights coming on for no longer then 10 seconds indicated problems. Probably on a component level on a board inside the unit.

Did you purchase this used off of a stranger? Did they give you any indication that there was a problem with it or did they pull the old, "I'm selling this for a buddy and don't know shit". routine?

Besides anything else, I don't believe the DX-D4 was designed to interface with the 3440. The control signal connectors are different, no?

Do you have the manual for the 3440? If so, which dbx NR unit does it specify as the correct one to mate with it?

Sorry for all the headaches. :(

Cheers! :)
 
Hey, well I bought it off eBay, and yes to your , "I'm selling this for a buddy and don't know shit" :(

In any case the control cable from the DX-4D connected perfectly into the back of the A-3440..

I do have the manual and service manual for the A-3440, the manual shows the RX-9 being the mated unit, but I've been told that that unit is rare and was prone to failures..

The thing I don't get is, is this, when the lights on the dx-4d turn off, I hear a 'click' from the A-3440, like a relay turning off.

I did a bit more playing around, and found this..

I hit record on the A-3440, stop, then play, and the lights come back on the dx-4d for another ten seconds, then turn off...

*sigh* lol
 
Unless you've really screwed up the connection paths and have somehow created a loop that is forcing the deck to mute and protect itself, (which I don't believe it has that capability as a feature), I'll maintain that the dbx unit is in need of qualified service. ;)

Cheers! :)
 
Well, I think you are right.. I will add this, the unit is from Europe.. Yes, I do have a pro voltage converter, 120/240V 300W, since the unit is only 10W its more then enough.

I am starting to wonder if perhaps the relay circuit in the A-3440 maybe faulty?

I wish one of you were near enough to cross test this equipment with!

Ghost, its like the unit powers up fine, sees the A-3440 connection, then the A-3440 shuts it off, its really bizzare..

I will post a couple videos of this tomorrow.
 
Last edited:
There is an Export model of the dx-4d and there is a plug inside of it next to the transformer.
In the directions it says Make sure and unplug it from the wall first!

1. Remove the top cover of the unit by removing the screws on each side.

2. locate the voltage selector plug near the transformer inside the unit.

3 pull out the plug and reinsert it so that the desired voltage appears in the cut out window of the plug.

This could be the problem with your unit.
 
I will try that, but that only changes it from 240v @ 50Hz to 120v @ 60 Hz right?
 
They dont say in the manual but yes it should be set for 120 volts
 
Ok I will give that a try, you never know.. I do have a proper matching converter for it now though, it switches 120v - 240v..

I am also going to pull out the schematic for the 4 track and see about that relay I keep hearing inside the machine that clicks when the led's switch off.
 
Is it a good idea to have the recorder on top of the DBX like that?

-MD
 
There is extra metal on the inside that is more then enough to support the 4 track, else I wouldnt dare put it on top. :)
 
I am going to take apart the 4 track and check the control circuit as per the service manual. It seems like the signal isn't working properly thats being sent to the dbx.. I keep hearing a relay clicking off when the lights go off on the dbx..

Will let you know how it turns out.
 
problems??

hi guys,
the 3440 simply does not cooperate with the dbx unit. i have used several d4 units with a tascam ATR-60, tascam 48 or 58, MS-16 etc etc.
it works automatically correct. as long as the cascade cable is connected to the recorder it works. the d4 requires a numeric data signal from the recorder to work properly. your dbx is not a bad unit. the tascam 3440 does not send the right signal via the cascade cable. i dont know if the software protocol allows the older tascam model to "talk" to the dbx unit. inside the dbx unit is no jumper or switch to change to a different operating mode. the only way to make it work is to change the tascam 3440. i am not familliar with that machine. maybe a jumber or switch inside the recorder.
i sold one dbx d4 to someone in france and he has exactly the same problems. greetz. frank

u can download a manual print here
beroshima.com/download/tascam1.pdf
beroshima.com/download/tascam2.pdf
 
Last edited:
beroshima said:
hi guys,
the 3440 simply does not cooperate with the dbx unit. i have used several d4 units with a tascam ATR-60, tascam 48 or 58, MS-16 etc etc.
it works automatically correct. as long as the cascade cable is connected to the recorder it works. the d4 requires a numeric data signal from the recorder to work properly. your dbx is not a bad unit. the tascam 3440 does not send the right signal via the cascade cable. i dont know if the software protocol allows the older tascam model to "talk" to the dbx unit. inside the dbx unit is no jumper or switch to change to a different operating mode. the only way to make it work is to change the tascam 3440. i am not familliar with that machine. maybe a jumber or switch inside the recorder.
i sold one dbx d4 to someone in france and he has exactly the same problems. greetz. frank

u can download a manual print here
beroshima.com/download/tascam1.pdf
beroshima.com/download/tascam2.pdf
Click to expand...




For what its worth, I just got word from TEAC that the TASCAM DX-4D DBX units do not work with the 3440 as it was designed only for the TASCAM models 30, 40, and 50 series recorders.
 
Groovtubes said:
For what its worth, I just got word from TEAC that the TASCAM DX-4D DBX units do not work with the 3440 as it was designed only for the TASCAM models 30, 40, and 50 series recorders.
Click to expand...

Correct, the DX-4D does not operate with a A-3440 even though the control signal cable will fit into the connector. You can modify the DX-4D to become a stand alone device and no control signal will be nessessary.
 
Yes but

yes the DX4 is designed to hook up with the 30 series and the 3440 has control signalsfor the RX4 (or was it the rx9). However the dx4 has 4 encode channels and 4 decode channels. So you can engage the dx4 by soldering a jumper inside the unit. This unmutes it. The bypass switches cut the dx4 into and out of the circuit. There is a thread that shows the jumper somewhere on this bbs.

Searching...searching...Sratching

Look at this thread https://homerecording.com/bbs/showthread.php?t=271661&highlight=dx4

Post #21 tells how to turn on your dx4d so that it will work with any deck. Photos included.

Regards, Ethan
 
The model was the Rx9. But that unit works with the 22 series recorder and the dx-4d works with that series recorder also.
 
You must log in or register to reply here.
Back
Top