AV-21PM
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
POWER 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 20-detected, the SUB-POWER is
msec. intervals and judges the re-turned off. While the SUB-
sults in every 24 time. Of the 24POWER is being turned off, the
times, if NG is detected morePOWER key on the remote con-
than 13 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 3 secondsAfter aboutDetection of
after the power is turned on, the SUB POWER is turned off3 secondsan abnormality
immediately and the POWER and ON TIMER LEDs flash.
Power onStart ofFlashing LEDs
detection
SUB-POWER OFF
[ Indication by the LED ]
Item LED flashing intervals
Over-current and CRT NECK protection At 0.24-second intervals
No. 5605527 |
ACEC
