joust

Member Since 02 Dec 2004
Offline Last Active Yesterday, 09:14 AM
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Posts I've Made

In Topic: DC-300...one channel down

Yesterday, 09:14 AM

I found this : http://titanaudio.ne...t&product_id=52
It's a direct replacement board for the ua739!

A.

In Topic: XLS Series 2 Amp Trigger / Sleep Connection?

28 April 2016 - 02:21 PM

Just a small precision :
In the image portrayed, let us suppose that a 12V trigger has not been enabled; Then the NC (normally closed condition) connections 87a and 30 should be used. Unit is in sleep mode.
Let us now suppose that the ssp (surround sound processor) is operationnal and a 12V trigger is applied : Then the NO (normally open condition) connections 87 and 30 should be used. Unit is now operationnal.

When the ssp  is awake, the relay has to be set to OFF; When the 12V trigger is removed the relay should be normally closed (amp in Sleep). I believe all leds should still be active. They could be turned off via Menu.

Hope this helps!

A.

In Topic: Crown XTI 4000 won't stay powered on.

28 April 2016 - 09:04 AM

Flore, can you 'fix' this amp? If so, let me know your results on the list above. Note : This is NOT a common issue, as stipulated above.

It is possible (that is, without any other information) that it may be a controller or signaling issue.

Once the smps has fired up (smps modulator is up and running at half voltage), the main amp controller receives power, boots up and then checks to see if the output amp section has issues : DC or short in one channel, thermal overloads, etc. Once the controller has detected no apparent fault, it send a signal to close the smps Voltage Doubler and Soft Start relays. If one of these signals is not present or perhaps, the relay buffer is faulty, then the smps will not be getting the total supply voltage and will send a signal back to the controller to inform it that the smps has an issue and the controller may trigger the crowbar circuit and the amp faults until the amp is cycled. Under certain circumstances, the amp may keep cycling by itself.

Hope this helps!

A.

In Topic: XLS Series 2 Amp Trigger / Sleep Connection?

28 April 2016 - 08:47 AM

What does the 12v amp trigger do?
As for the 2502 : AUX connector : If you want the amp to go to sleep, wire pin 1 to pin 2, simple. You could install a relay that will close pin 1 and pin 2 that can be triggered externally to let the amp go to sleep. May need different configuration if an external trigger is used to 'Awake' amp (remove closure).
As for the Status connection, I believe it is a 'Ready' or 'not' signal for other external amps.

Hope this helps!

A.

In Topic: 9000i Fan, ready light not turning on

28 April 2016 - 08:34 AM

Hello Adam, Unfortunately, I don't have enough information to go on : Is the smps and low voltage supply operating normally? Is the APM (audio processor module) board [power] supplied?
As you can see it may be very difficult to have a precise diagnosis! But I seem to recall that I once had an APM fault that may have caused a similar symptom.
I recommend that you get the amp verified at your favourite local authorized Crown service center.

A.