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
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
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.
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.
Anyone got schematic for this modification or even the service bulletin for this?
It is not present in the service manual I have.
It is not present in the service manual I have.
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