Page
44
Model
1000AR
Installation and Operation Manual
6/4/2001
© copyright 1997 by
Powertec
TRANSI STO R M O DULE STATI C TEST
Equipment needed:
A
D
igital
M
ulti-
M
eter (
DMM
)with a diode scale is preferred. You should have a RED lead
in the positive (+) input and a BLACK lead in the negative (-) input.
Preparation:
Different meters give different readings on diode tests. KNOW YOUR METER !! Some
meters read backwards due to battery polarity. Test YOUR meter on a known good diode
bridge before performing tests so that you know how your meter will act.
Refer to page 32 for the drive power schematic and semi-conductor diagrams.
Precautions:
If the transistor module is to be tested in circuit, make sure power has been off long
enough for the capacitor banks to completely discharge.
Procedure:
The procedure is the same for in circuit or out of circuit testing. If a component tests bad
in
circuit, it must be tested again after it is removed because of the possibility of alternate
paths when the component is in circuit.
SIX TRANSISTOR MODULE
RED LEAD
BLACK LEAD
GOOD
BAD
P N open
short
N
P
0.3 to 2.0
short or open
N
U
0.3 to 0.7
short or open
N
V
0.3 to 0.7
short or open
N
W
0.3 to 0.7
short or open
U
P
0.3 to 0.7
short or open
V
P
0.3 to 0.7
short or open
W
P
0.3 to 0.7
short or open
P B1 open
short
P B2 open
short
P B3 open
short
U B4 open
short
V B5 open
short
W B6 open
short
B1
U
0.3 to 500
short or open
B2
V
0.3 to 500
short or open
B3
W
0.3 to 500
short or open
B4
N
0.3 to 500
short or open
B5
N
0.3 to 500
short or open
B6
N
0.3 to 500
short or open
TWO TRANSISTOR MODULE
RED LEAD
BLACK LEAD
GOOD
BAD
C1 E2 open
short
E2
C1
0.3 to 2.0
short or open
E2
E1C2
0.3 to 0.7
short or open
E1C2
C1
0.3 to 0.7
short or open
C1 B1 open
short
E1C2 B2
open
short
B1
E1C2
0.3 to 500
short or open
B2
C2
0.3 to 500
short or open