JVC AV-32230 Service Manual page 34

AV-32230
AV-32260
SELF CHECK FUNCTIONS
1. Outline
This model has self check functions given below. When a malfunction has been detected, the POWER is turned off and the LED flashes to inform
of the failure . The malfunction is detected by the signal input state of the control line connected to the microcomputer.
2. Self check items
Check item
Over-current protector
3. Self check indicating function
The self-check function begins detection about 5 seconds after power
is supplied.
In the event a malfunction is detected, the power is cut off immedi-
ately.
At this time, the ON-TIMER LED flashes to inform of the malfunc-
tion.
[ON-TIMER LED indication]
The ON-TIMER LED flashes at 0.5 seconds intervals.
34
Details of detection
Operation of B1 protector circuit.
No. 51802
Method of detection
The microcomputer detects at 1
second intervals.
If NG is detected for more than
200 ms, a malfunction is inter-
preted.
POWER After about
Supplied 5 seconds
Start of
detection
State of malfunction
When a malfunction has been
detected, the POWER is turned
off. While the POWER is being
turned off , the power key of the
remote controller is not opera-
tional until the power code is
taken out and put in again.
Malfunction
is detected
POWER OFF
Flashing
ON-TIMER LED