LPCA (Lower PCA) Board Replacement

About

This procedure provides instruction to remove and install the LPCALower printed circuit assembly; generally this refers to the lower board. On treadmills, this is the motor controller unit (MCU), and on self-powered units, it is the main board in the lower section. (Lower PCALower printed circuit assembly; generally this refers to the lower board. On treadmills, this is the motor controller unit (MCU), and on self-powered units, it is the main board in the lower section.) board.

LPCA System Block Diagram

LPCA Interface Connections

    

ID	Interface
	Lift (J3)
	Battery (J9)
	Comm Serial (J2)
	Active Status Light (J12)
	Generator (J1)
	Eddy/Brake (J7)
	ACAlternating Current: electric current which periodically reverses direction between positive and negative polarity. Adapter (J4)

 

LPCA Fuse Locations

There are two replaceable fuses located on the LPCA board:

• 2 Amp LPCA power supply
• 6.3 Amp lift motor fuse.

Procedure

Review entire procedure before starting.

Removal Instructions

1. Remove the Left Drive Disk Cover, see Drive Disk Covers Replacement.
2. Remove the one #2 Phillips screw fastener and remove the LPCA/Battery Module cover. Retain part(s) and/or fastener(s) for installation.



3. Disconnect the Positive (Red) and Negative (Black) battery terminal cables.
4. Remove the following LPCA interface cables:
1. Disconnect the Generator (J1) cable .
2. Disconnect the Eddy/Brake (J7) cable .
3. Disconnect the Lift (J3) cable .
4. Disconnect the Battery (J9) cable .
5. Disconnect the Comm Serial (J2) cable .
6. Disconnect the Active Status Light (J12) cable .



5. Remove the two #2 Phillips screw fastener and remove the LPCA board. Retain part(s) and/or fastener(s) for installation.
6. If attached, disconnect the AC Adapter (J4) cable .

Installation Instructions

1. If removed, reinstall the AC Adapter (J4) cable .
2. Reinstall the LPCA board using the two #2 Phillips screw fasteners.
3. Reconnect the following LPCA interface cables:
1. Reconnect the Lift (J3) cable .
2. Reconnect the Battery (J9) cable .
3. Reconnect the Comm Serial (J2) cable .
4. Reconnect the Active Status Light (J12) cable .
5. Reconnect the Generator (J1) cable .
6. Reconnect the Eddy/Brake (J7) cable .
4. Reconnect the Positive (Red) and Negative (Black) battery terminal cables.
5. Reinstall the LPCA/Battery module cover using the one #2 Phillips screw fastener.
6. Reinstall the Left Drive Disk cover, see Drive Disk Covers Replacement.
7. Verify machine operation and return to service, see Operation Verification.