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Old 1st August 2009, 04:28 PM   #1
teflon1 is offline teflon1  Denmark
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Default ax-700u

Hi,

If anyone happens to have a copy of the Yamaha AX-700U service manual I'd be obliged to receive it from them.

Thanks,
John
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Old 4th August 2009, 02:00 PM   #2
teflon1 is offline teflon1  Denmark
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Wow, no one has a copy of the service manual for the ax-700U?

It would be a big help, mine is acting kind of funny, could be blown.
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Old 4th August 2009, 07:30 PM   #3
teflon1 is offline teflon1  Denmark
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Is it not worth trying to fix?
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Old 4th August 2009, 07:36 PM   #4
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Did you try searching on Google? Many places sell PDF service manuals for Yamaha products. The odds of someone here having it are probably not very good.
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Old 4th August 2009, 07:41 PM   #5
Netlist is offline Netlist  Belgium
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John, it's probably worth fixing but I can't help with a manual.
Perhaps explaining what the fault is might trigger others to help you out.
I remember some Yamaha series having problems with the motorized volume control and/or input selector but I think this model isn't equipped with them.

/Hugo
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Old 5th August 2009, 03:57 AM   #6
Bigred is offline Bigred  Canada
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Well if it would be a big help then whats $10 or so to just buy one.
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Old 5th August 2009, 11:42 AM   #7
teflon1 is offline teflon1  Denmark
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Almost the same were you to buy it and ship it over, less shipping and that its your ten bucks that is.

The specs on these amps are respectable. I'm uncertain as to the topology within however it seems ordinary with a few hindering features. In its stock form it's found littered with nice audio grade electrolytic caps.

There seems to be some hum on it with a lack of amplification. DC offset checks out alright but I suspect a slight problem in the input or tone control/balance stage, many of which seem to have lost function.

It could be an issue with any one of the controls or pots but I suspect its at a more fundamental level than that to render most of those controls inoperable.
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Old 5th August 2009, 12:05 PM   #8
Netlist is offline Netlist  Belgium
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You did check the 'tone bypass' and 'cd direct' buttons I assume?
Also, is the hum present without anything connected on the inputs, moderate volume and top cover in place?

/Hugo
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