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DjLeco 25th May 2009 07:35 AM

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!

schnake99 31st May 2009 04:14 PM

schematic P4500


Brett 1st June 2009 06:49 AM

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?

DjLeco 10th June 2009 09:42 AM

Thank you
Thank you, alot.

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

Just PM or mail me at: !

chinokscapsighter 10th January 2011 09:24 AM

can you post the schematic diagram of xp7000.....or send to my email tnx...... :)

toprepairman 29th November 2012 07:28 AM

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.

toprepairman 4th December 2012 06:31 PM

Hi, still looking for these voltages, anyone please?

pinkmouse 4th December 2012 09:05 PM

Give the chaps at Yamaha tech service a call, they're very helpful.

toprepairman 5th December 2012 12:09 PM

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....

Tarzan 5th December 2012 06:18 PM

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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