Pioneer CDJ-900 Service Manual page 51

5
[6] Output of the alarm port
Although "Normal/abnormalities of each device at the time of power supply ON and initialization" can be judged by
Auto device diagnosis of a "[3] Indication of various information", the test port output on a main board can also be checked.
When a defect is detected by the device by power supply ON, an alarm port (STATUS TEST POINT) performs the following
pulse outputs.
5
6
CDJ-900
6
7
7
8
A
B
C
D
E
F
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