Star Tech Journal

June 1997
... continued from previous page
acceptance. The microprocessor
will hold P2-7 high to inhibit bill
acceptance. Credit is transmitted
to the changer in the same way
as the High Level interface. The
Low Level interface will also
support the Escrow Return capa-
bility of the bill acceptor by hold-
ing P2-8 low allowing current to
flow from V UNREG through
an opto-coupler on the bill accep-
tor control board and back to the
microprocessor through P2-8.
While a bill is held in escrow bill
acceptance is inhibited by hold-
ing P2-7 high. To accept the bill
(transport to Stacker), P2-7 is
held low. To return the bill P2-8
is toggled high while P2-7 is held
high. When an escrow mode is
enabled credit is transmitted to
the changer when the bill is vali-
dated and again when it is ac-
cepted. When the escrow mode
is disabled, only one relay closure
is used.
AREAs To INVESTIGATE
Model TRC-6800
(High Level Interface)
• Blocker signal from vendor
• Exact Change Light circuit
• Accessory Block
• Central Processing Block
AREAs To INVESTIGATE
Model TRC-6800 ·
(Low Level Interface)
• Accessory Block
• Central Processing Block
2. Vend Relay
No Vend signal to the vendor.
When accumulated credit meets,
or exceeds, the set price, the
Vend Relay is enabled for ap-
proximately 80 milliseconds.
AREAs To INVESTIGATE
Model TRC-6800
• Vend Relay circuit
• Central Processing Block
3. Exact Change Light
No &act Change Light operation or
Exact Change Light on with Lower
5c or 25c Coin Tube Sensor covered
( dependent upon the mode of opera-
tion selected).
When an exact change (Lower
25c or Lower Sc Coin Tube Sen-
sor uncovered, dependent upon
the mode of operation) condition
exists, the Exact Change Light in
the vendor will be enabled.
AREAs To INVESTIGATE
Model TRC-6800
• Exact Change Light circuit
• Coin Tube Sensor circuit
• Central Processing Block
4. Cash Counter
No or incorrect Cash Counter opera-
tion.
After change is dispensed, the
Cash Counter is enabled once
for every Sc of remaining credit.
AREAs To INVESTIGATE
Model TRC-6800
• Cash Counter circuit
• Central Processing Block
5. Talking Coke Option
No or incorrect Talking Coke opera-
tion.
When the first coin of a transac-
tion is accepted the First Gate
enable signal is coupled to the
Talking Coke Option box
through P2-1 to enable a verbal
message. During a dispense
operation P2-2 is pulsed low to
generate a change reminder
message.
AREAs To INVESTIGATE
Model TRC-6800
• Accessory Block
• Central Processing Block
6. Electronic Cash Audit
No or incorrect operation.
The Model TRC-6800 is capable
of transmitting transaction data
to an Electronic Cash Audit sys-
tem, utilizing the ACD signal at
P2-6. Included in this data are:
1. Power up counts
2. Value of current credit
3. Value of each vend
4. Value of bills in bill
acceptor magazine
5. Cash Box total
6. Slug messages
AREAs To INVESTIGATE
Model TRC-6800
• Accessory Block
• Central Processing Block
7. LCD Credit Display
Symptoms - No or incorrect
Credit Display operation. As
credit is accumulated and
decremented, it is displayed.
AREAs To INVESTIGATE
Model TRC-6800
• Accessory Block
• Central Processing Block
8. Bill Dispenser
Not used at this time.
srARllCH
Journal