Troubleshooting by Indication on the Remote Controller
354
Power Transistor Check
Perform the following procedures prior to check.
(1) Power OFF.
(2) Remove all the wiring connected to the PCB where
power transistors are mounted on.
[Preparation]
[Point of Measurement and Judgement Criteria]
z
Turn OFF the power supply. Then, after a lapse of 10
minutes or more, make measurement of resistance.
When using the analog type of multiple tester, make
measurement in resistance measurement mode in the
x1k
Ω
range.
z
Multiple
tester
∗
Prepare the analog
type of multiple tester.
For the digital type of
multiple tester, those
with diode check
function are available
for the checking.
No.
Measuring
point
Judgement
Criteria
Remarks
+
–
1
P2
U
2 ~ 15k
Ω
2
P2
V
3
P2
W
4
U
P2
15k
Ω
and more
(including )
Due to condenser charge and
so on, resistance
measurement may require
some time.
5
V
P2
6
W
P2
7
N3
U
8
N3
V
9
N3
W
10
U
N3
2 ~ 15k
Ω
11
V
N3
12
W
N3
CHECK 4
