AV-21D81
AV-20N81
AV-16N81
AV-16N81G
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 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 BThe main microcomputerWhen an abnormality has been
line is detected.detects the possible abnormalitydetected, the SUB-POWER is
at 30-msec. intervals and judgesturned off. While the SUB-
the results in every 16 time. OfPOWER is being turned off, the
the 16 times, if NG is detectedpower key of the remote
more than 9 times, it is judgedcontroller is not operational until
that there is an abnormalitythe power code is taken out and
put in again.
CRT NECK protectionOperation of Vertical deflectionDITTODITTO
circuit.
X-ray protectionOperation of X-ray protectionDITTODITTO
circuit
3. Self check indicating function
At about 3 seconds after the power is turned on, the self-check
After aboutAfter about
function starts.
3 sec.5 sec.
In the case where an abnormality has been detected within the
subsequent 2 seconds, the LED flashes, but the SUB-POWER
is not turned off.Start ofFlashing LED
Power on
When an abnormality has been detected at about 5 secondsdetection
after the power is turned on, the SUB POWER is turned off
immediately and the LED flashes.
Detection ofSUB-
anPOWER
abnormalityOFF
[ Indication by LED ]
ItemLED flashing intervalsPriority of detection
ź Over-current protectionQuikly (at about 0.25sec.) intervals1
 CRT NECK protection / X-ray protectionSlowly (at about 0.5sec.) intervals2
Note : In case of ź +  , the item ź is indicated
[NOTE]
X-RAY : There are some different types of models with and without X-RAY PROTECTION.
LED : There are some kinds of LEDs. In the models equipped with LEDs flash (turn on and off) simultaneously. In the models with one
of the above LEDs, the LED flashes.
32No. 51902 |
ACEC
JVC
