Owner`s manual

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2008 AFG Service Seminar [rev 1.3] | 37

Section Two | Voltage Checks

B7: Power Voltage (to UCB)

B2: Incline Pot

B3: Incline GND

B5: Digital GND

B4: Digital GND

B6: RPM

B1: Incline VCC

B8: Power Voltage (to UCB)

B9: Speed Command (PWM)

B10: Drive Motor Relay

B11: Incline Down

B12: Incline Up

>> 12 Wire Console Cable Voltage Chart (DC Volts)

Wire

Color

Function Console Cable

Voltage

no wires cut

Voltage at

UCB

no wires cut

Voltage at MCB

after wire’s cut

Physical Symptoms-If Wire Cut

1 Black Incline VCC 2.5 vdc 0.0 vdc 2.5 vdc After Start pressed constant down incline, down LED

constant on. In Hardware Test the motor moves down

but not up, value always at maximum.

2 Brown Incline Pot 2.5 vdc at 0.0% incline,

0.5 vdc at max incline.

Voltage changes with

each change in incline.

2.5 vdc 0.0 vdc After Start pressed constant down incline, down LED

constant on. In Hardware Test the motor moves down

but not up, value always at maximum.

3 Red Incline

GND

n/a ground 2.5 vdc, grounded

at MCB not UCB.

0.0 vdc, grounded at

MCB not UCB.

Constant up incline. In Hardware Test, motor moves

up and down. Incline value started low and went

down to 0 but not up past 10. Value changes very

slowly.

4 Orange Digital

GND

n/a ground 0.0 vdc 0.0 vdc If one removed, no issues. If both removed: UCB does

not turn on. Both incline lights are on and incline mo-

tor hums and gets hot quickly. See below for voltage

chart if both grounds removed.

5 Yellow Digital

GND

n/a ground 0.0 vdc 0.0 vdc

6 Green RPM When speed sensor

aligned to

magnet: short, 0.0vdc.

When sensor not

aligned:open,5.0 vdc

5.0 vdc 0.0 vdc Everything works in normal mode but the console

does not register a speed in Hardware Test or Auto

Calibration

7 Blue Power

Voltage

(to UCB)

15 vdc constant

Range=15 to 17 vdc

0.0 vdc 17 vdc If one removed, no issues. If both removed: UCB does

not turn on. At UCB green measures 0.46 vdc, white

1.4 vdc, all others 0.0 vdc.

8 Purple 15 vdc constant

Range=15 to 17 vdc

0.0 vdc 17 vdc

9 Grey Speed

Command

(PWM)

0.0 vdc before started,

0.5 vdc at 0.5 mph, 4

vdc at 10 mph. Volt-

age changes as speed

changes.

“0.0 vdc b/f start

0.36vdc aft start

increases as

console speed

increased”

“0.8 vdc b/f start

0.7 vdc aft start no

change as console

speed increased”

No belt movement, MCB relay clicks. LCD 1 lights.

When measuring MCB voltage, there is a slight belt

movement, then stops

10 White Drive Motor

Relay

4.3 vdc before started

0.0 vdc after started

“5.0 vdc b/f start

0.0 vdc aft start”

“1.4 vdc b/f start

1.4 vdc aft start”

No belt movement, no click from MCB relay. LED 1

does not light.

11 Pink Incline

Down

0.0 vdc before started,

0.0 vdc while inclining,

1.9 vdc while declining.

Voltage constant while

inclining/declining.

“0.0 vdc b/f start

5.0 vdc if press

incline down”

0.0 vdc Up incline functions, no down incline, LED’s function

for up, not for down. If incline then decline, motor

does not move again until past incline point. Ex. If in-

cline to 2.0 % then back down to 0%, the motor will not

move until 2.5 %. In Hardware Test, on;ly up incline,

value increases, does not decrease.

12 Light

Blue

Incline Up 0.0 vdc before started,

1.9 vdc while inclining,

0.0 vdc while declining.

“0.0 vdc if at 0%

5.0 vdc if not at

0% or at console

height”

0.0 vdc Down incline functions, no up incline, LED’s function

for down but not up. In Hardware Test, down incline

functions until value at 0, no up incline. Similar phe-

nomenon to cut Pink wire if incline stopped not at 0%.

Note: Wire colors are subject to change.