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Old 25th May 2009, 07:35 AM   #1
DjLeco is offline DjLeco  Romania
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Post Yamaha P4500

Hi, I'm trying to repair a Yamaha P4500 power amplifier, Ch 1 is faulty, I need some schematics, if anyone have it...

I'm giving in exchange, schematics ofCrown XTI4000 , or Crown ITech 6000, originals schematics!
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Old 31st May 2009, 04:14 PM   #2
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Default schematic P4500

http://schnake99.sc.funpic.de/schema...00%20P4500.pdf

schnake99
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Old 1st June 2009, 06:49 AM   #3
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I didn't need that as mine are fine, but it will be saved, just in case. Thank you kindly.

You don't have any more of the P series schematics do you as I have several different models?
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Old 10th June 2009, 09:42 AM   #4
DjLeco is offline DjLeco  Romania
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Default Thank you

Thank you, alot.

If anyone need, I can help it with XP7000 Schematics.

Just PM or mail me at: claudiu971@yahoo.com !
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Old 10th January 2011, 09:24 AM   #5
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can you post the schematic diagram of xp7000.....or send to my email chinoks_capsighter@yahoo.com tnx......
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Old 29th November 2012, 07:28 AM   #6
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Hi. Does anyone know what the correct HT voltages should be?
One I have in at the moment has 140 Volt rails, which seems a bit high.
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Old 4th December 2012, 06:31 PM   #7
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Hi, still looking for these voltages, anyone please?
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Old 4th December 2012, 09:05 PM   #8
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Give the chaps at Yamaha tech service a call, they're very helpful.
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Old 5th December 2012, 12:09 PM   #9
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Hi Pink. Thanks for the sensible suggestion.
Phoned Yamaha today and eventually spoke to Robin Ruston. He tells me they all but closed the service dept down and there is no longer anyone there with any knowledge of the P4500. Ho hum....
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Old 5th December 2012, 06:18 PM   #10
Tarzan is offline Tarzan  Belgium
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Hello Toprepairman,
There is no voltage mentioned in the service manual of the P4500.
But if I look at the caps; 2200uF/160V, 140V dosn't need to be to high.
It's also a High Power Beast...
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