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The self-diagnosis helps troubleshooting and field-servicing.
The self-diagnosis software of the LLC-8000A consists of the following programs.
. Self-diagnosis of the CPU-240 board
. Self-diagnosis of the Operation Unit
. Self-diagnosis of the ASW-58 board (LU-800B/LU-801B)
2-1. CPU-240 Board
2-1-1. POWER ON Indicator
The LED's on the CPU-240 board are illuminated, as follows:
D1 :
CPU Run indicator
Flashes in red when CPU main routine works as intended.
+5 V power supply indicator
D2 :
Lights in green when the voltage of +5 V is provided.
D18 : Power key input LED
Lights in red when the power key of the operation unit is pressed.
D19 : Signal transmission system indicator
Lights in red when signal transmission system works as intended for the number of students that
are registered on installation setting stage.
D19 D18 D1 D2
LLC-8000A
Section 2
Self-Diagnosis
CPU
IC60
NORM
DIAG
S1
+5 V Power supply indicator (green)
CPU run indicator (red)
Power key input LED (red)
Signal transimission system indicator (red)
CPU-240 Board
2-1
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