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16. Vending machine controllers and electronic box
Overview In this section you will find the following information:
• Components of the vending machine controllers
• Components of the electronic box
• Dismounting the vending machine controllers
• Disconnecting plugs from the vending machine controllers
• Replacing the EPROM
• Replacing the NOVRAM with built-in lithium battery
• Dismounting the power supply cable
• Accessing the electronic box
Warning Be extremely careful, your life can be endangered!
The vending machine controllers are carrying the mains voltage if the
machine is connected to the power supply.
Make sure that no splashes of the product or water get onto the vend-
ing machine controllers.
Note The vending machine controllers of the machine contains a RAM cir-
cuit with an internal battery (lithium) backup (NOVRAM). The RAM
circuit can explode if not handled correctly. Do not disassemble, short-
circuit, expose to water or to flame or temperatures in excess of 100°C.
Return discharged NOVRAM circuits to the supplier.
Attention Observe precautions for handling electrostatic discharge sensitive de-
vices:
• To protect the PCBs, VMC, SPC etc. and sensitive devices, EPROM,
NOVRAM etc. against damage from static electricity, you have to
make sure that you are discharged, before touching sensitive devices.
Always remember to touch one of your hands to the cabinet and hold
the device with the other hand.
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