pioneer crossover cd-635

ian33 · 30th June 2011, 09:53 PM

This crosover came in with Q9 0pen(b1248) and C49 pop.I replace Q9 with a733 for test.I am not getting no output from this crossover.The input is connected to IC 1 which looks like a lil driver board.It is painted all in black i can't tell what sm parts it has.Am only geting +9v on the opamps(c4570ha).should it have -9v to? if any one has a service manual please send it to me Ranks33@hotmail.com

Perry Babin · 1st July 2011, 12:04 AM

I don't have the manual but many of the Pioneer crossovers work from a 9v supply and have no negative voltage.

The input modules commonly failed on the older crossovers and equalizers but I don't know if that's common for this model. Do you have signal coming out of the module?

ian33 · 1st July 2011, 12:36 AM

Do you no on what pins i should get signal coming out?

Perry Babin · 2nd July 2011, 05:28 PM

Index of /temp/pioneercd-635

The files are Flash files. Open them with your browser. Right-click to zoom in.

ian33 · 3rd July 2011, 04:59 PM

i have no signal coming out of the module.What can i do to bybass that module?

Perry Babin · 3rd July 2011, 05:10 PM

The module is required to prevent ground loops. If you bypass it, you will need to use a ground loop isolator at the input of the crossover to prevent having engine noise. If you use the isolator, connect the shield of the input to the chassis of the crossover and the center conductors of each channel to the output pads for the module (remove module).

ian33 · 3rd July 2011, 05:34 PM

The owener was using this crossover in his home on a 12v 7amp power supply.I came up with a lil idea but am not sure if it is safe?Are there any small circuit i can build that will be smaller than the ground loop isolator ?Here is what i did. 25v 10 uf caps on the output pins of the module.The module is still in there.I am geting audio out and all function seems to be working.

ian33 · 3rd July 2011, 05:35 PM

That from the rca inputs

Perry Babin · 3rd July 2011, 05:41 PM

Power it from a DC power supply with an isolated ground (most wall-warts) and you shouldn't need the GLI.

ian33 · 3rd July 2011, 05:46 PM

Ok thanks

30th June 2011, 09:53 PM	#1
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	pioneer crossover cd-635 This crosover came in with Q9 0pen(b1248) and C49 pop.I replace Q9 with a733 for test.I am not getting no output from this crossover.The input is connected to IC 1 which looks like a lil driver board.It is painted all in black i can't tell what sm parts it has.Am only geting +9v on the opamps(c4570ha).should it have -9v to? if any one has a service manual please send it to me Ranks33@hotmail.com

1st July 2011, 12:04 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I don't have the manual but many of the Pioneer crossovers work from a 9v supply and have no negative voltage. The input modules commonly failed on the older crossovers and equalizers but I don't know if that's common for this model. Do you have signal coming out of the module? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd July 2011, 05:28 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Index of /temp/pioneercd-635 The files are Flash files. Open them with your browser. Right-click to zoom in. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

3rd July 2011, 05:10 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The module is required to prevent ground loops. If you bypass it, you will need to use a ground loop isolator at the input of the crossover to prevent having engine noise. If you use the isolator, connect the shield of the input to the chassis of the crossover and the center conductors of each channel to the output pads for the module (remove module). __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

3rd July 2011, 05:41 PM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Power it from a DC power supply with an isolated ground (most wall-warts) and you shouldn't need the GLI. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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3rd July 2011, 04:59 PM	#5
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	i have no signal coming out of the module.What can i do to bybass that module?

3rd July 2011, 05:35 PM	#8
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	That from the rca inputs

3rd July 2011, 05:46 PM	#10
ian33 diyAudio Member Join Date: Jun 2010 Location: the caribbean	Ok thanks

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