Nortel Millennium Phone: Coin Acceptor
There are quite a few chips on the coin acceptor mechanism, including what looks like a custom Motorola microcontroller. It is not a simple switch for each coin type and
relay for accept/return of coins. There appears to be some sort of elctromagnetic sensow to read the coin type, a solenoid to reject non-valid coins
immediately, and a servo to rotate the hopper into the coin return/coin keep areas.
Given that most of the 10 pins are connected to ground, and there are at most 4 pins to work with, I am guessing there is some sort of serial communication to control the coin mechinism from the main board.
- 1: Ground
- 2: unknown, goues to the cathode end of a diode
seems to be transmitting something serially off this pin. data is
sent reproducably in response to coins, etc.
- 3: Unknown
- 4: Ground
- 5: Ground
- 7: Ground
- 8: Ground
- 9: Looks like power for the circuit. Goes to the Vdd pin on an Op Amp.
- 10: unknown, goues to the cathode end of a diode
possibly the recieve from pc pin.