AV-21F3PX
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 microcomputer detects theWhen an abnormality has been
is detected.possible abnormality at 1-sec.detected, the SUB-POWER is
intervals.turned off. While the SUB-
If NG state is detected for morePOWER is being turned off, the
than 1 ms, the microcomputerPOWER key on the remote con-
judges that there is an abnormal-trol unit is not operational until the
ity.power cord is taken out and put
in again.
CRT NECK protectionOperation of CRT NECK protec-DITTODITTO
tion circuit
X-ray protectionOperation of X-ray protection cir-DITTODITTO
cuit.
3. Self-check indicating function
When an abnormality has been detected at about 5 secondsAfter aboutDetection of
after the power is turned on, the SUB POWER is turned off5 secondsan abnormality
immediately and the ON TIMER LED flashes.
Flashing ON TIMER LED
Power onStart of
detection
SUB-POWER OFF
[ Indication by the LED ]
ItemLED flashing intervals Priority of detection
Over-current protection/X-ray protection At 0.5-second intervals 1
CRT NECK protection At 1-second intervals 2
No. 5603426 |
ACEC
