AV-21L31
AV-25L31
SELF-CHECK FUNCTIONS
1. Outline
This model has self-check functions given below.When an abnormality has been detected,the SUB POWER is turned off and both ECO and ON
TIMER LEDs flash to inform of the failure.An abnormality is detected by the signal input state of the control line connected to the microcomputer.
2. Self check items
Check itemDetails of detectionMethod of detectionState of abnormality
Over-current protectionAn over-current on the low B lineThe main microcomputer detectsWhen an abnormality has been
is detected.the possible abnormality at 30-detected, the SUB-POWER is
msec.intervals and judges theturned off. While the SUB-
results in every 16 time. Of thePOWER is being turned off, the
16 times, if NG is detected morePOWER key on the remote con-
than 9 times, it is judged thattrol unit is not operational until the
there is an abnormality.power cord is taken out and put
in again.
CRT NECK protectionOperation of CRT NECK protec-DITTODITTO
tion circuit
3. Self check indicating function
When an abnormality has been detected at about 5 seconds after
the power is turned on,the SUB POWER is turned off immediatelyAfter aboutDetection of
and the LEDs flash.5 secondsan abnormality
Power onStart ofFlashing LEDs
detection
SUB-POWER OFF
[ Indication by the LEDs]
Item LEDs flashing intervals Priority of detection
1 Over-current protection At 0.2-second intervals 1
2 CRT NECK protection At 1-second intervals 2
Note: In case of 1 + 2, the item 1 is indicated.
No. 5190833 |
ACEC
