Required Testing Conditions:
•Air Pressure Switch must be operated. Contact COM and NO closed.
•All fuses, F1, F2, F3, F4, and F5 must be good.
•Transformer Thermal Overload (O/L) must be closed.
|
Line Voltage at J2 Supply Power IN
|
Terminals W4 and W5 |
- |
|
Line Voltage on PCB
|
Terminals W3 and W5
|
- |
| Terminals W2 and W5
|
- |
| Terminal W5 and on J1 plug
terminal 1 - Brown lead |
- |
|
Line Voltage for 115 or 230 VAC
to Transformer
|
Line Voltage at J1 plug at Terminals 1 and 5 |
- |
| 115 VAC at Terminals 2 and 3 |
- |
| 115 VAC at Terminals 4 and 5 |
- |
|
24 VAC Supply to Unit
|
J4 plug Terminals 1 and 2 |
D2 ON |
| J6 plug Terminals 1 and 3, 2 and 4 |
|
20 VAC Supply to Light
|
J5 plug Terminals 1 and 2
|
D3 ON |
| J7 plug Terminals 1 and 2 |
|
12 VDC Supply to LIN Connections
- Chair and Assistant’s Unit
|
J3 plug Terminals 1 and 2 |
D1 ON |
| J8 plug Terminals 1 and 2
|
|
Continuity Check of Transformer’s
Thermal Overload (O/L)
|
Continuity should be present at
Transformer Brown and Black leads.
J1 plug Terminals 1 and 2
|
- |
Power Supply PCB Test Points