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5.1
SELF CHECK FEATURE
5.1.1 OUTLINE
This unit comes with the "Self check" feature, which checks the
operational state of the circuit and displays/saves it during
failure.Diagnosis is performed when power is turned on, and
information input to the main microcomputer is monitored at all
time.Diagnosis is displayed in 2 ways via screen display and LED
flashes. Failure detection is based on input state of I
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF CHECK MODE
(1) Press
the
[RETURN+]
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key then enter the SELF CHECK MODE.
NOTE:
When a number key other than the [2] key is pressed in the
SERVICE MODE screen, the other relevant screen may be
displayed.
This is not used in the SELF CHECK MODE. Press the
[MENU] key to return to the MAIN MENU SCREEN.
5.1.3 HOW TO EXIT THE SELF CHECK MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the Self check display mode.
To Clear (Reset) Failure History:
Turn off the power by pressing the [POWER] key on the remote
control unit when in the Self check display mode.
5.1.4 FAILURE HISTORY
Failure history can be counted up to 9 times for each item. When
the number exceeds 9, display will remain as 9. Failure history
will be stored in the memory unless it has been deleted.
NOTE:
Only SYNC (with/without sync signals) will be neither counted
nor stored.
5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be diagnosed as "Abnormal" and counted.
(1) Temporary defective transmissions across circuits due to
pulse interruptions.
(2) Misalignment in the on/off timing of power for I
when turning on/off the main power.
Therefore, turn on the main power, and then wait for about 3
seconds before starting Self check.
If recurrences are expected, ensure to clear (reset) the failure
history and record the new diagnosis results.
1-18 (No.YA655<Rev.001>)
SECTION 5
TROUBLESHOOTING
2
C bus and
key
and
[MUTING]
key
2
C bus (Vcc)
SERVICE MODE SCREEN
S ERV ICE ME NU
V er .xxx
1. ADJUS T
2. S E LF CHE CK
3. I2C S TO P
NOT USED
Press [2] key
SELF CHECK MODE SCREEN
LOB
9
ME M
0
AIO
3
TUN
0
HDM
3
S YN
NG
S M D
3
TIME
68 5536
TOT AL
1 3710 72 M AX
Refer to SECTION 1
Fig.5-1
Failure history
Diagnosis
OK:Normal
NG:Abnormal
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