222, 223, 622 and 623 Table Main PC Board Test and Repair

This illustration shows the location of the fuses on the Main PC Board. Use the table below to determine the required action.

Main PC Board

Problem Required Action

Base actuator motor does not run.

Check fuses F1and F2, F3, F4.

Perform Base Relay Test

Back actuator motor does not run.

Check fuses F1and F2, F3, F5.

Perform Back Relay Test
222 and 622
Single function / One Relay Fuses - Base Relay

F1 and F2

Primary Fuses - affect all functions

F3

Base Motor Fuse - affects Base Up / Down

F4

Transformer Fuse - affects all functions

223 / 623
Dual function / Two relay Fuses - Base Relay and Back Relay

F1 and F2

Primary Fuses - affect all functions

F3

Base Motor Fuse - affects Base Up / Down

F4

Transformer Fuse - affects all functions

F5

Back Motor Fuse - affects Back Up / Down

Main PC Board Base / Back Relay test

Wires must remain connected to PC Board to perform this test.

Base Relay Test

1.Set meter to VDC.

2.Clip meter test hooks terminals at J2 and J3.

3.Activate Base Up / Down function using the foot or hand control.

Meter Reading Status Required Action

Approximately 48 VDC

Thumbs down

PC Board is good.

Perform next check.

0 VDC

Thumbs down

Replace PC Board.

Wires must remain connected to PC Board to perform this test.

Base Relay Test

1.Set meter to VDC.

2.Clip meter test hooks terminals at J4 and J5.

3.Activate Back Up / Down function using the foot or hand control.

Meter Reading Status Required Action

Approximately 48 VDC

Thumbs down

PC Board is good.

Perform next check.

0VDC

Thumbs down

Replace PC Board.

Main PC Board Replacement

Boards manufactured after 6/05 will beep for approximately three seconds when table is first plugged in.

1.Remove outer shrouds. Refer to:Table Shroud Removal

The inner and middle shrouds will drop down. It is not necessary to remove them.

Caution

Unplug power cord before removing PC Board cover.

2.Unplug power cord and remove PC Board cover.

3.Disconnect ground wire. Tag and disconnect wiring from PC Board.

4.Remove PC Board.

Push latches back, then lift off of mounting studs.

1.Install PC Board.

2.Connect ground wire. Connect all wiring.

3.Replace PC Board cover.

222 / 622 PC Board is shown. 223 / 623 will have additional wiring.

4.Replace outer shrouds. Refer to:Table Shroud Removal