SiUS341802E
Check
Service Diagnosis
286
3.4
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
RXLQ72TATJU
Point of Measurement and Judgement Criteria
Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of
resistance.
PCB and Circuit Diagram
CHECK 4
Multimeter
∗
Prepare the analog type of multimeter.
For the digital type of multimeter, those with
diode check function are available for the
checking.
When using the analog type of multimeter,
make measurement in resistance
measurement mode in the x1 k
Ω
range.
When using the digital type of multimeter,
make measurement in diode check mode
(
)
No.
Measuring
point
Judgement
criteria
Remarks
No.
Measuring
point
Judgement
criteria
Remarks
+
–
+
–
1
P4
U
2 ~ 30 k
Ω
1
P4
U
1.2 V or
more
Due to condenser
charge and so on,
resistance
measurement may
require some time.
2
P4
V
2
P4
V
3
P4
W
3
P4
W
4
U
P4
15 k
Ω
or
more
(including
)
Due to condenser
charge and so on,
resistance
measurement may
require some time.
4
U
P4
0.3 ~ 0.7 V
5
V
P4
5
V
P4
6
W
P4
6
W
P4
7
N4
U
7
N4
U
8
N4
V
8
N4
V
9
N4
W
9
N4
W
10
U
N4
2 ~ 30 k
Ω
10
U
N4
1.2 V or
more
Due to condenser
charge and so on,
resistance
measurement may
require some time.
11
V
N4
11
V
N4
12
W
N4
12
W
N4
V1R
L3B
P22
PS
X41A
V1R
N5
V1D
SHT1
L2B
K1M
R1
V
+
X72A
WHT
X63A
L1B
-
X6A
C1
P21
W
BLU
X4A
HAP
X601A
U
K3R
+
K84R
X71A
P11
–
P4
+
X6A
N4
P5 RED
230V 16K
N4
U
V
W
P4
Summary of Contents for Aurora Series
Page 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Page 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Page 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Page 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Page 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...