Power Supply 153941 Connection Test Points Test and Repair
230 V~ model requires air pressure to activate chair. If air pressure is unavailable, then plug chair power into supply power cord.
| Recommended | |
|---|---|
| PSI | kpa |
| 30 | 206.8 |
| 50 | 344.7 |
| 80 | 551.6 |
| 100 | 689.5 |
Required Testing Conditions:
•Air Pressure Switch must be operated. Contact COM and NO closed.
•All fuses, F1, F2, F6, F7, F8, F11, and F12 must be good.
•Transformer Thermal Overload (O/L) must be closed.
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POWER SUPPLY TEST POINTS |
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|---|---|---|
| Voltage Reading | Test Point | LED Status |
| Line Voltage at J1 Power IN | On top of F3 and F4 Fuses on the J1 Connector J1 Outlet | |
| Line Voltage at Power OUT | Power OUT Terminals 1 and 2 | |
|
25 VAC Supply to Unit |
Unit Power Terminals 3 and 4 | D2 ON |
| Unit Power Terminals 7 and 8 | ||
|
20 VAC Supply to Light |
Light Power Terminals 3 and 6 | D1 ON |
|
9 VAC Supply to Unit |
Accessories Terminals 1 and 2 | D3 ON |
|
5 VDC Supply to USB Hub (Models 153941-001 and 153941-002 only)) |
USB Hub Power Terminals 1 and 2 | DM4 ON |
|
12 VDC Supply to LIN Connections |
LIN Connections (Chair and Assistant’s Unit) |
DM1, DM2, and DM3 ON |
|
Continuity Check of Transformer’s Thermal Overload (O/L) |
Continuity should be present at Transformer Brown and Black leads |
|
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Refer to:Wiring Diagram - Power Supply 153941 |
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|
Pin |
Light Power
J4 Plug |
Unit Power
J5 Plug |
USB Hub Power | Accessory | Power Out | Power In |
|---|---|---|---|---|---|---|
| 1 | PE Gnd | PE Gnd | Gnd | 9 VAC | Line | Line |
| 2 | LIN Gnd | N/A | SVDC | 9 VAC COM | Neutral | Neutral |
| 3 | 20 VAC Com | 24 VAC Com | PE Gnd | PE Gnd | ||
| 4 | N/A | 24 VAC | ||||
| 5 | LIN | PE Gnd | ||||
| 6 | 20 VAC | N/A | ||||
| 7 | 24 VAC COM | |||||
| 8 | 24 VAC | |||||
| PE Gnd = Protective Earth Ground LIN Gnd = Chair Control DCV Ground reference N/A = Not Applicable. |
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