Power Supply 153808 Connection Test Points Test and Repair

Power SupplyWiring Diagram for Model 153808 Assembly End View

Recommended
PSI  kpa
30 206.8
50 344.7
80 551.6
100 689.5

This drawing is for clarity.

Refer to: Light Harness

Refer to: Delivery Unit Harness

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.

Refer to: Wiring Diagram

Power Supply PCB Test Points
Voltage Reading Test Point LED Status

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

 -

LED Power Indicators
D1 ON when 12 VDC is supplied to J3 and J8 LIN Connections.
D2 ON when 24 VAC is supplied to J6 Unit Connector.
D3 ON when 20 VAC is supplied to J7 Light Connector.

PE Gnd = Protective Earth Ground
LIN Gnd = Chair Control DCV Ground reference

 

Pin		 Power to Unit
J6 Plug		 Power to Light
J7 plug		 Chair Power Supply Power
J2 Plug
1 PE Gnd PE Gnd Line Line
2 LIN Gnd LIN Gnd Neutral Neutral
3 24 VAC Com 20 VAC Com PE Gnd PE Gnd
4 24 VAC N/C - -
5 PE Gnd LIN - -
6 LIN 20 VAC - -
7 24 VAC Com - - -
8 24 VAC - - -