Hifonics ZEUZ ZX4000 - SO NEED service manual or schematic! - diyAudio
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Old 23rd January 2013, 04:27 AM   #1
lexxm6 is offline lexxm6  Russian Federation
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Default Hifonics ZEUZ ZX4000 - SO NEED service manual or schematic!

Hello
I owner Hifonics ZEUS ZX4000 from Russia. Recently, a clipping in one of the channels. Unfortunately, in Russia there is no official representation Hifonics. There is no service.
I contacted the Maxxsonics and Audiodesign, but they refused to help me with send the service manual for this amp. No one wanted to help and get in my difficult situation.
I got in touch with the people in Russia who are engaged in service Hifonics before, but they did not have the service manual for this amp. I do not know what to do ... I love this amp and I would like to use it on, but I can not fix it without a schema.
Send to repair to Germany is very expensive for this device.

If anyone has friends in the any service center, who repairing Hifonics amps, please ask them for a service manual, or at least one sheet with full circuit diagram for ZX4000.

Thanks a lot anyway.
Alex.

Last edited by lexxm6; 23rd January 2013 at 09:06 AM.
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Old 23rd January 2013, 09:57 AM   #2
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Do you have an oscilloscope? If so, post a photo of the distorted waveform.
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Old 23rd January 2013, 10:04 AM   #3
lexxm6 is offline lexxm6  Russian Federation
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I haven't
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Old 23rd January 2013, 10:12 AM   #4
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Post a good quality photo of the board.
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Old 23rd January 2013, 10:17 AM   #5
lexxm6 is offline lexxm6  Russian Federation
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Top side
https://www.dropbox.com/s/cnm7w6rsmc...2016.33.47.jpg

Bottom side
https://www.dropbox.com/s/zx53zk8pf6...2017.19.17.jpg

All I have for now

Last edited by lexxm6; 23rd January 2013 at 10:21 AM.
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Old 23rd January 2013, 10:51 AM   #6
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Have you tried operating all of the pots and switches through their entire range to see of the distorted channel ever plays through cleanly?

Have you tried swapping the RCA inputs to confirm that the problem is not the input signal?

What are you using to trace the signal through the amp to see where it becomes distorted?

What's the number on the 8-pin IC in the center of the board between the large white resistors?
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Old 23rd January 2013, 10:59 AM   #7
lexxm6 is offline lexxm6  Russian Federation
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Quote:
Originally Posted by Perry Babin View Post
Have you tried operating all of the pots and switches through their entire range to see of the distorted channel ever plays through cleanly?

Have you tried swapping the RCA inputs to confirm that the problem is not the input signal?

What are you using to trace the signal through the amp to see where it becomes distorted?

What's the number on the 8-pin IC in the center of the board between the large white resistors?
1. Yes. Now I desolder all pots except gain.
2. Yes. Other amps play clear.
3. Only my ears.
4. It's OpAmp BA4558. (I haven't other one in DIP8 case for change and check)

So for quality repair better way is get schematic...
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Old 23rd January 2013, 11:02 AM   #8
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Even with a diagram, you'd have to be able to trace the signal though the amp to determine where it becomes distorted.
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Old 23rd January 2013, 11:12 AM   #9
lexxm6 is offline lexxm6  Russian Federation
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Thank you. I know this. But I need to know where I need to check it.
Manual tracing is to hard for me. And services do not take it for repair without schematic.
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Old 23rd January 2013, 11:34 AM   #10
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The first place that you need to check for clean/distorted audio is on the input to the 4558.
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