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Check SiUS091133
151 Service Diagnosis
5.13 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 referring to the table below.
If the resistance is or less than 1 k, short circuit occurs on the main circuit.
09/12 class
Negative (–) terminal of
tester (positive terminal
(+) for digital tester)
~ (2, 3) + (4) ~ (2, 3) – (1)
Positive (+) terminal of
tester (negative terminal
(–) for digital tester)
+ (4) ~ (2, 3) – (1) ~ (2, 3)
Resistance is OK. several k
~ several M
several k
~ several M
Resistance is NG. 0 or 000 or
(R12035)
Tester
–~~+
1
2
3
4
–
+
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