Part No. 920525 Rev A - Wayne 3/VISTA series Service Manual

See board layouts in Section 9 for for identification and location of connector assignments and LED indicators.
Symptom
Sale and Unit Price
Displays are out
68

Part No. 920525 Rev A

Table 6-2 SYMPTOMS AND SOLUTIONS
Probable Cause
1 No AC power to dispenser
2 No DC power to computer
3 Defective 24V DC Distribution
board
4 Defectice Power Supply board
5 Defective Relay board
6 Defective display
7 Defective computer
Corrective Action
Check control power circuit breaker.
Check check for AC input voltage at J3 on Relay Board.
If not present check in J-box. If not present in J-box, problem
is in site wiring. If present in J-box, problem is in internal dis-
penser wiring.
Check LED indicators on computer for DC power and "Heart-
beat" (see board layout for LEDs). If all are On, see Proba-
ble Cause 6 and 7. If all not On, see Probable Cause 5.
All LEDs should be On. DS6 is 24v input LED. Check for 24
VDC input at Computer J1.
If present, see Probable Cause 7.
If not present, check at DC Distr Board J4 output, fuse F1,
and J1 input. If present at J1, see Probable Cause 3.
If not present at J1, check at Power Supply Boad J2 output,
J1 input. If present at J1, see Probably Cause 4.
If not present at J1, see Probable Cause 5.
Replace fuse F1 or board as necessary.
Replace board
Check fuse F1 on Relay board. Replace board if fuse is bad.
Replace board
Replace board
June 2001