AV-20N8
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 the ON
TIMER LED flashes 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 the re-turned off. While the SUB-
sults in every 16 time. Of the 16POWER is being turned off, the
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
At about 3 seconds after the power is turned on, the self-checkAfter aboutAfter about
3 seconds5 seconds
function starts.
In the case where an abnormality has been detected within
the subsequent 2 seconds, the ON TIMER LED flashes, but
the SUB-POWER will be turned on when the elapsed time af-Power onStart ofFlashing LED
detection
ter power on reaches 5 seconds.
When an abnormality has been detected at about 5 seconds
after power on, the ON TIMER LED flashes, and then the SUB
POWER will be turned off immediately.
Detection ofSUB-
anPOWER
abnormalityOFF
[ Indication by the LED ]
Item ON TIMER LED flashing intervals Priority of detection
? Over-current protection At 0.25-second intervals 1
� CRT NECK protection At 0.5-second intervals 2
Note: In case of ? + �, the item ? is indicated.
No. 5603026 |
ACEC
