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Do not connect a tester whatever type it may be.
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Never repair or disassemble SDM (3).
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If SDM has been dropped from a height of 90 cm (3 ft) or more, or if there are cracks, dents or other defects in the case or plate, replace it with a new one.
If any faulty condition is found in the following checks, replace.
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Check SDM (2) and SDM plate (3) for dents, cracks or deformation.
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Check SDM connector (1) for damage, cracks or lock mechanism.