SiUS041111
Check
Service Diagnosis
125
5.12 Main Circuit Short Check
Check No.20
Note:
Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.
0 V before checking.
Measure the resistance between the pins of the DB1 as below.
If the resistance is
or less than 1 kW, short circuit occurs on the main circuit.
09/12 class
(–) terminal of the tester (in
case of digital, (+) terminal)
~
(2, 3)
+
(4)
~
(2, 3)
–
(1)
(+) terminal of the tester (in
case of digital, (–) terminal)
+
(4)
~
(2, 3)
–
(1)
~
(2, 3)
Resistance is OK.
several k
~ several M
several k
~ several M
Resistance is NG.
0
or
0
0
0
or
Tester
–~
~
+
1
2
3
4
–
+
(R14675)
