Hi,
I study the schmatics of the Nakamichi RM-300 Remote control, which is the original wired RC for the Nakamichi 1000ZXL.
Its schematics is provided in page 99 of the 1000ZXL Service Manual, and is herebelow:
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On this schematics, it appears that the pins 2 and 4 of the RAMM DIN connector (see upper right) carry information coming from the 1000ZXL to the Integrated circuit IC-001 (this info should be used to display the counter value on the RC counter).
I try to know how this information is formatted from the tapedeck ? is there a modern integrated circuit that could read this information ?
To date, nobody knows...
Thank you
I study the schmatics of the Nakamichi RM-300 Remote control, which is the original wired RC for the Nakamichi 1000ZXL.
Its schematics is provided in page 99 of the 1000ZXL Service Manual, and is herebelow:
On this schematics, it appears that the pins 2 and 4 of the RAMM DIN connector (see upper right) carry information coming from the 1000ZXL to the Integrated circuit IC-001 (this info should be used to display the counter value on the RC counter).
I try to know how this information is formatted from the tapedeck ? is there a modern integrated circuit that could read this information ?
To date, nobody knows...
Thank you
I think to reverse engineer this for sure you'd need a working remote and deck, and a DIN breakout to see the voltages etc. Its seems like the mechanism connector is producing a control voltage (pin 8) that goes to the RAMM push-buttons, so perhaps they are gated by the mechanism somehow? Back in this era the logic voltage might not even be 5V, you'd probably need to check in case they are doing something obscure in the deck.
It is not so difficult to understand how the relays work and the logic behind them (you are right regarding pin 8 providing 12V).
But what I try to understand is how the information is transmitted on pins 1 and 2 of the RAMM connector, from the deck to the remote: I just need to know the information format !
But what I try to understand is how the information is transmitted on pins 1 and 2 of the RAMM connector, from the deck to the remote: I just need to know the information format !