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Prology DVD-557 Service Manual page 11

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E Read disc abnormal(For S&D board)
DISC IN
NO
Refer to Focus abnormal
Focus on?
YES
NO
Refer to laser abnormal
Is laser normal?
YES
NO
Refer to disc turn abnormal
Does the disc turn?
YES
NO
Refer to TOC abnormal
Can TOC be read?
YES
Normal
11

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