Check
SiENBE04-808_A
153
Service Diagnosis
5.1.13 Main Circuit Short Check
Check No.29
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 k
Ω
, short circuit occurs on the main circuit.
20/25/35 class
42 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 in OK
several k
Ω
~ several M
Ω
∞
∞
several k
Ω
~ several M
Ω
Resistance in NG
0
Ω
or
∞
0
0
0
Ω
or
∞
(R12035)
Tester
–~
~
+
1
2
3
4
–
+
(R12266)
Tester
–~
~
+
1
2
3
4
–
+
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