Service manual

Check SiBE05-722ED
107 Service Diagnosis
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
approximately 0 V before checking.

Measure the resistance between the pins of the DB1 referring to the table below.
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If the resistance is
∞
or less than 1 k
Ω
, short circuit occurs on the main circuit.
RK(X)S25/35E2V1B
Negative (–) terminal of multimeter
(positive terminal (+) for digital
multimeter)
~
(2, 3)
+
(4)
~
(2, 3)
–
(1)
Positive (+) terminal of multimeter
(negative terminal (–) for digital
multimeter)
+
(4)
~
(2, 3)
–
(1)
~
(2, 3)
Resistance is OK.
several k
Ω
~ several M
Ω
∞∞
several k
Ω
~ several M
Ω
Resistance is NG. 0
Ω
or
∞
000
Ω
or
∞
(R19664)
–~~+
1234
+
–
Multimeter