MELODY SERVICE MANUAL
PAGE 1
2006
SUNRISE MEDICAL
Section 1
Troubleshooting: No Power
Check that the voltage is going to the controller, set the me-
ter to dc volts and take a voltage reading from pin 1 (using
the red lead) and pin 2 (using the black lead) to the charger
port of the VR2 joystick (see figure A1.2.1) If the voltage
meter reads approximately 24 volts, replace the controller, if
the meter reads less than 12 volts, proceed to the next step.
Note: Make sure the polarity is correct. If the read-
ing is intermittent, there is a connection or Control-
ler problem. If polarity is reversed proceed to step 1.6
1.2 Test Joystick
1.1 Circuit Breaker Reset
A1.2.1
I
f On/off button is pressed and no light or bar is shown, check
for tripped circuit breaker (see figure A1.1.1) and make sure
all connections are clean and tight (including the batteries). If
the problem persists, then perform the following diagnostics.
A1.1.1
2
1
3
1.3 Battery Test
Check that the batteries are fully charged and in good condi-
tion. Remove the battery box, and the battery cover, use the
meter to check the voltage across the battery terminals (see
figure A1.3.1). If the voltage meter reads between 12 -13.5
volts, then proceed to next step. If the voltage meter reads
below 12 volts, charge the batteries.
Note: To find a bad battery, use a battery load tester.
A1.3.1
If the voltage meter reads below 12 volts, charge the batteries.
