Sony BKDS-PA3291, Maintenance Manual

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3-8(E)
BVS-A3232
3-4-7. Buzzer Test
This test checks whether the buzzer (BZ1) on the CPU-94 board sounds normally or not.
Set S7 to F and press S2 to start the test.
S7 Setting: F
(Press S2 after changing the setting.)
3-5. Error Indications
The self-diagnosis starts when the main power is turned on or when reset. The self-diagnostics are
performed periodically during normal operation. If an error is detected, the unit indicates it using the
status indicator on the front panel or by sounding the buzzer, and outputs the error information to the
control terminal. It also indicates the corresponding 2-digit error code using ND1 on the CPU-94 board
so that you can approximately locate where the error occurred.
• Error Indications Displayed by the Status Indicator
LED Condition Meaning of the Error
Lighting in green The switcher is operating normally.
Flashing in green Synchronizing signal was not detected.
Lighting in red If both the CPU-94 board and backup CPU-94 board (BKDS-RS1690) are installed, the error
indicates that some trouble occurred on one board and that operation was taken over by the
other board.
If both the power supply unit and backup power supply unit (BKDS-PA3291) are installed, the
error indicates that the power output is not supplied from the unit which lamp is shutoff (no
lamp lights up).
Flashing in red One of the following errors was detected during self-diagnostics:
• The fan stopped.
• The S-BUS data link is broken.
Shutoff No power supply unit is installed. Or the power output is not supplied even though the power
supply unit is installed.
8
0
4
C
S7
3-4. Test Mode
3-5. Error Indications