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Old 22nd May 2011, 06:02 AM   #1
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Default Nakamichi PA-7 protection circuit

Hi all
I've seen a Nakamichi PA-7 mark I for sale. I would like to know if the
factory upgrade for the protection circuit was already done. How can I
(visually) check that?
Regards from Switzerland
Andy
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Old 23rd August 2012, 04:16 PM   #2
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Default PA-7 Protect Circuit Upgrade Identification

Andy, If the upgrade has been done, there is a very small 3-leg circuit board attached to the rear of the main board. Two transistors Q241 &I Q242 + R266, R267 & R268 (Right channel part numbers). The L-channel is identical. There are also 3 wires connected to other added components on rear offer main board.
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Old 23rd August 2012, 04:46 PM   #3
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Hi Roger
thank you very much! Very helpful.
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