Special Precautions
DISCHARGING THE CAPACITORS
WARNING
The capacitor in the transistor controller can hold
an electrical charge after the battery is disconnec-
ted. To prevent electrical shock and personal in-
jury, discharge the capacitor before inspecting or
repairing any component. Wear safety glasses.
Make certain the battery has been disconnected.
DO NOT use a screwdriver to discharge the trac-
tion motor controller.
WARNING
To avoid personal injury and prevent electrical
shock, perform the following steps before per-
forming any troubleshooting or adjustments, and
connecting or disconnecting a handset or PC.
CAUTION
To avoid controller damage, always disconnect
the battery. Discharge the capacitor and never put
power to the controller with any power wire dis-
connected. Never short any controller terminal or
motor terminal to battery. Make sure to use proper
procedures when servicing the controller.
1.
Move the truck to a safe, level area. Turn the
key switch to the OFF position and disconnect
the battery.
2.
Remove the drive unit compartment cover to
access the drive unit compartment.
3.
Discharge the capacitors in the controllers by
connecting a 200-ohm, 2-watt resistor across
the controller's B+ and B
−
ure 5. DO NOT short across the motor control-
ler terminals with a screwdriver or jumper
wire.
1.
CONTROLLER
2.
POSITIVE CONNECTION
3.
INSULATED JUMPER WIRES
4.
200-OHM, 2-WATT RESISTOR
5.
NEGATIVE CONNECTION
Figure 5. Discharging Controller
4.
Remove the 200-ohm, 2-watt resistor before re-
connecting the battery.
Special Precautions
2200 SRM 1632
6
