Crane Snack Eenter I - Page 28

Snack - Based Troubleshooting and Repair Guide
1670065 Page 24 of 54 September, 2002
No display.
Bad display PCB.
1. Disconnect everything but the dis-
play and its power input. If the
display works again, re-connect
items one by one until the problem
is found.
a. If display still does not work,
replace display PCB
Display PCB
on page 41.
Bad ribbon cable.
b. If ribbon cable is bad, replace
the ribbon cable.
Bad controller
board.
c. If everything is connected and
the display still does not work,
replace controller board.
Controller
Board on
page 39
No “heartbeat
LED on main con-
troller
1. No 24VAC to main controller
2. Bad RAM or EPROM
Test for
24VAC CJ37
replace
One or several
selection(s) will
not vend.
1. Swap the affected tray with a
known good one.
Program-
ming Guide
Failure on the
affected tray.
2. If the problem moves with the tray,
check all connections on the tray
board and motors. Check the tray
harness for proper continuity.
a. Replace the tray harness.
Tray Rails
on page 45
b. Replace tray PCB.
Tray Rails
on page 45
c. Replace affected tray motor.
Tray Rails
on page 45
Failure in the
machine cabinet.
3. If the problem does not move with
the tray, check connections of the
harness between the tray and the
rail, and check the harness for
proper continuity.
a. Replace the harness.
b. Replace the interface PCB.
Interface
Card
on page 40
Table 1. Possible Failures (Symptoms) - Continued
SYMPTOM
POSSIBLE
FAILURE(S)
DO THIS: REFER TO: