Sony DVP-NS330 Service Manual page 103

2-2. Operation of Auto Self Check
When the Self Check mode becomes active at the AC Power ON or by key input, the test display of the following steps (1) to (4) is
repeated.
(1) FLD and LED all ON (for 5 seconds)
(2) MODEL display (for 2 seconds)
(3) Version display (for 2 seconds)
(4) ROM creation date display (for 2 seconds)
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