Service manual

Electrical Service Manual V4.0

11-4

ELECTRICAL COMPONENTS

DIODES

Diodes are devices that only allow electricity to ﬂow in one dorection. We use 2 types of

diodes on our equpment. Supression diodes and bridge rectiﬁer diodes.

Testing diodes.

There are two methods of testing diodes. The ﬁrst is with a meter with a diode checking

function and the second is with a meter without a integrated diode checker.

For meters with a Diode Checker:

Set the meter to the diode checker range.

Test the diode in one direction and then the other direction.

You should hear the beeper sound in on direction and then not the other.

For meters without a diode checker funcion:

Set your meter to the DC volts seting.

Attach the black meter lead on the ( - ) battery terminal.

Attach the red meter lead to one diode lead. Touch the other diode lead to ( + ) battery

terminal. Revers the diode and repeat the proceedure. You should seee voltage in one

direction but not in the other. If you see voltage in both directions or in neither direction the

diode is bad.

RESISTORS

Resistors are devices that reduce the ﬂow of electricity. We use them in our machines to

reduce the voltage going to certain componenets.

TERMINALS

We use a number of different terminals on our equipment. We use traditional insulated ter-

minals, bare terminals for battery cables and Molex terminals.

Insulated Terminals

Bare Terminals

Molex Terminals