Crane Snack Eenter I - Page 31

Snack - Based Troubleshooting and Repair Guide
September, 2002 Page 27 of 54 1670065
Only certain rows
of buttons work on
selection keypad.
1. Check the monetary door switch
for proper operation. Replace as
needed.
2. Replace the display PCB and rib-
bon cable.
Display PCB
on page 41
Maintenance key-
pad does not
respond; no beeps.
1. Check the monetary door switch
for proper operation. Replace as
needed.
2. Replace the maintenance keypad
3. Replace the controller PCB.
Maintenance
Keypad on
page 52
Pad beeps but
nothing happens.
1. Check all connections on the inter-
face PCB. Replace as needed.
Interface
Card
on page 40
No selections
vend.
1. Check all connections between the
interface PCB and the trays.
Replace harnesses as needed.
Spirals turn half-
way then stop.
Possible loose
connections.
1. Check connections on tray rail
PCBs and interface PCB. Swap the
trays to see if problem still exists.
2. Check the harness between the tray
rail PCBs and the interface PCB
for proper continuity. As needed:
a. Replace affected harness(es).
b. Replace the interface PCB.
Tray Rails
on page 45
Interface
Card
on page 40
Multiple selec-
tions vend at the
same time.
Possible tray diode
problem.
1. Disconnect as many trays as possi-
ble. Then plug them in one at a
time after vending from each tray.
Tray Rails
on page 45
2. When the problem happens again,
check the diodes of the last tray rail
PCB to be connected.
3. If all diodes check good, check the
diodes on the tray rail PCB you
connected just before.
a. Replace the affected tray rail
PCB.
Tray Rails
on page 45
Table 1. Possible Failures (Symptoms) - Continued
SYMPTOM
POSSIBLE
FAILURE(S)
DO THIS: REFER TO: