5
UNSAFE WORKING CONDITION!!
(See fig. 1 for
location of this fuse.)
Low voltage fuse:
This is the secondary transformer fuse for
the 5 - 28 vdc sections of the main logic board and hopper. It
is located to the left of the transformer. (See fig. 1) Replace
this fuse with a 2-½ amp AS fuse only.
REPLACING THIS
FUSE WITH ANYTHING OTHER THAN A 2 ½ AMP
“AS” MAY RESULT IN A FIRE OR AN UNSAFE
WORKING CONDITION!!
Functional Description of the Series AC400/500 Changer
To follow along with this walk-through of your changer, fill
the hopper with coins and turn the changer on.
1.
When power is applied the validator will cycle twice.
The out-of-service LED flashes then goes out. The green
LED on the main logic board comes on steady, and the
red LED on the main logic board will light then go off
then flicker on once per second in the standby mode.
2.
During the power-up mode the main logic board relay
clicks twice enabling power (120vac) to the validator.
When this relay is not enabled it routes 12vdc ground to
the out-of-service LED. Without power to the validator
the changer cannot accept bills. Since we are not in the
error mode, the red LED on the validator logic board is
on steady.
3.
When a bill is inserted into the validator bill slot, the bill
will be pulled inside. The validator then compares what
the bill looks like to its memory. After the bill is
validated it grounds the 5vdc lines causing a pulse along
the yellow and blue validator harness wires to pins 5 and
6 of the main logic board. Each pulse stands for the
amount of the denomination validated. (i.e. 1 pulse for
$1, 5 pulses for $5).
4.
The 5vdc pulse then travels from pins 5 and 6 to the
EPROM chip (ver. MIDI C-40) pin #8. The EPROM
multiplies the bill pulse by 4.
5.
The EPROM then sends the hopper pulses out pin #18 to
pins 6 and 7 of the red 12-pin hopper plug. These pulses
travel through the purple and brown wires of the hopper
wire harness to the hopper.
6.
The EPROM turns the hopper on. The hopper optic
counts the coins out and sends them to the EPROM chip
on pins 8 &9. When the amount of hopper pulses in
equals the coins dispensed through the coin counting
optical sensor, the EPROM turns the hopper off.
7.
The Changer returns to the standby mode with the red
LED flashing once per second until another bill is
inserted.
Functional Descriptions of Out-of-Service Conditions
Out-of-Service conditions occur for the Series AC400/500
changer for the following reasons; low coins, hopper fault
error, validator fault, or a blown fuse.
1.
Blown Fuse
: an AC power spike in line voltage or a bad
transformer on the main logic board can cause A blown
fuse on the main logic board. If the fuse blows the
indication is the green LED on the main logic board will
not light.
A.
Replace the fuse. If the green LED now lights then
there was a spike.
B.
If it does not and the fuse blows again the power
transformer is shorted. To test the transformer use a
voltmeter set for ohms and measure across the
primary (40ohms) and the secondary (1.5ohms).
2.
Hopper Fault
: A hopper fault can either be a jammed
hopper, a blocked coin counting optic or a bad hopper
logic board.
A.
Indications for a jammed hopper are the changer
accepts bills, the meter counts up, but nothing or
not enough coins are paid out.
1.
After 1 minute the “Empty” LED on the
outside of the cabinet turns on and the
validator is shut off.
2.
At this point the three options open are to
attempt repair on your own, call your
distributor, or return the hopper to
American Changer.
B.
Indications for a blocked coin optic or bad hopper
logic board are the out-of-service LED on the
outside of the changer is lit and the red LED on the
main logic board is lit and flickers off once per
second.
3.
Validator Fault
: When a validator fault occurs the
validator’s EPROM shuts down the validator and flashes
an error code via the red LED on the validator logic
board. When there is no error this LED is on steady. The
validator only gives bill pulses to the main logic board so
the main board never knows if the validator isn’t
functioning. Therefore the out-of-service-LED will not
light. (Seepage 6 for validator error codes.)
4.
Low Coins
: The low coin condition is probably the most
common fault. The EPROM on the main logic board is
constantly checking for low coins in the hopper. This is
done with a low current 5vdc signal on pin #3 of the
hopper output connector. The voltage then travels down
the hopper wire harness on the white wire to pin #7 of
hopper plug. The signal is applied to one of the gold low
contact plates at the bottom of the hopper. The 5v travels
through the coins through the other contact gold plate to
hopper pin #2. It then goes through the black wire in the
hopper harness to pin #10 on the main logic board. Any
interruption of more than 1/2 a second will cause an out-
of-service condition.
A.
Clean the bottom gold plates of the hopper with
steel wool or fine sandpaper. Refill the hopper and
try again.
B.
Check continuity, (0 ohms) resistance, from pins 3
(white) and 10 (black) of the red hopper harness.
Make sure the hopper full and the changer turned
off.
1.
If the continuity is 0 ohms, replace the main
logic board.
C.
Pull the hopper out of the changer, then look at the
12 pin black male connector that sticks out of the
hopper. Place the continuity checker’s leads on
pins 2 & 7.
1.
If the continuity is 0 ohms, replace the hopper
plate or adjust the hopper plate’s female
socket’s pins so that they are not so spread out.
2.
If the continuity is infinity, then replace the
hopper.
