1-34 (No.YA092B)
SECTION 5TROUBLESHOOTING5.1 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. SELF-CHECK is performed when power is turned on, and
information input to the main microcomputer is monitored at all
time. SELF-CHECK is displayed in 2 ways via screen display and
LED flashes. Failure detection is based on input state of I2C bus
and the various control lines connected to the main
microcomputer.
5.1.2 HOW TO ENTER THE SELF-CHECK DISPLAY SCREEN
Before entering the SELF-CHECK display mode, confirm that the
setting of TV / CATV SW of the REMOTE CONTROL UNIT is at
the "TV" side and the setting of VCR / DVD SW is at the "VCR"
side. If the switches have not been properly set, you cannot enter
the SELF-CHECK display mode.
(1) Press the [SLEEP TIMER] key and set it to 0 minutes.
(2) Press the [VIDEO STATUS] key and [DISPLAY] key
simultaneously, then enter the SERVICE MENU.
(3) Press the [2] key to enter the SELF-CHECK mode.
5.1.3 HOW TO EXIT THE SELF-CHECK DISPLAY SCREEN
TO SAVE FAILURE HISTORY :
Turn off the power by unplugging the AC power cord plug when
in the SELF-CHECK 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 screen.
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 SELF-CHECK as "Abnormal" and displayed
and counted as "NG".
(1) Temporary defective transmissions across circuits due to
pulse interruptions.
(2) Misalignment in the on/off timing of power for I2C bus
(VCC) when turning on/off the main power.
SELF-CHECK may be impeded if a large number of items are
displayed as "NG". As such, start SELF-CHECK only after 3
seconds in the case of receivers and 5 seconds in the case of
panels upon turning on the power. If recurrences are expected,
ensure to clear (reset) the failure history and record the new
SELF-CHECK results.
<SERVICE MENU SCREEN>
Fig.1
Fig.2
SERVICE MENU
1. ADJUST
2. SELF-CHECK
3. I2C STOP
LOB FAN OK
SYNC S:OK HD:OK
TIM
MSM DIGI OK
MEM AVSW OK
YC AIO OK
TUN GCR OK
IP OK
OK
OK
OK
OK
OK
OK
M:OK
OK
RGB NG 2
DVI HDMI OK
Item Item
CHECK
Normality : OK
Abnormality : NG
< SELF-CHECK SCREEN >