Coin Separation; Coin Payout/Coin Return; Change Making - MEI TRC Series Service Manual

12
Changer Operation
Figure 10: Coin Paths

Coin Separation

Accepted coins are directed to the coin
tubes or cash box by the Separator Gate.
Each time a transaction occurs, the
microcomputer checks the upper coin tube
sensors to determine whether or not the
tubes require coins. The Separator Gate is
directed accordingly.
If the appropriate coin tube is full (sensor
covered) or the coin is not stored for
change, the Separator Gate remains open.
This sends the coin directly to the cash box
via the cash box chute.
If the tube requires coins (sensor exposed)
and the coin is stored for change, the
changer microcomputer closes the
Separator Gate. This directs the coin down
a path that contains windows leading into
the coin tubes. As the coin reaches a
window of the correct diameter, it falls into
that window's tube.

Coin Payout/Coin Return

Coin payout can result from a transaction - escrow return
request, exact change condition, or change making from
a completed vend - or by manually reducing the
inventory levels in the coin tubes. Coins selected are
paid out by the Dispenser Assembly.
Whenever possible, escrow return is paid coin-for-coin
from the coin tubes. Escrow for coins that are not stored
for change is paid utilizing the highest denomination
coins available in the coin tubes.
In general, escrow return for dollar coins and bills is paid
in the highest denomination coins available from the
coin tubes. Payback is assured by the minimum coin
tube levels required for dollar coin and bill acceptance.
Note: If No Escrow Return is selected, there is no
minimum coin tube requirement for the acceptance of
dollar coins or bills. Consequently, full payback may not
be possible.

Change Making

Change is paid out by the Dispenser Assembly utilizing
solenoid-operated slides. Each time a transaction
occurs, the changer microcomputer checks the status of
the lower coin tube sensors to see which coins are
available for change. Highest denomination coins are
paid back first. During a transaction, nickels, dimes and
quarters are paid out to the level of the lower coin tube
sensors. When used with a low level interface to a bill
acceptor, the TRC coin changer will not allow acceptance
of a dollar bill or coin if the lower dime and quarter
sensors are uncovered and more than seven nickels
would be required for change.