SECTION 5
TROUBLESHOOTING
5.1 SELF-DIAGNOSIS FEATURE
5.1.1 OUTLINE
This unit comes with the "Self-diagnosis" feature, which checksTEST MODE MAIN MENU
the operational state of the circuit and displays/saves it during
failure.Diagnosis is performed when power is turned on, andTEST MODE
information input to the main microcomputer is monitored at all
1. I2C STOP
time.Diagnosis is displayed in 2 ways via screen display and LED
2. STATUS DISP
2
flashes. Failure detection is based on input state of IC bus and
the various control lines connected to the main microcomputer. 4. SELF-CHK
5.CONVER OFF
5.1.2 HOW TO ENTER THE SELF-DIAGNOSIS DISPLAY MODE
ROM CORRECTION : ACT
Before entering the Self-diagnosis Display mode, confirm that
ROM VERSION :
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-diagnosis Display mode.
(1) Press the [SLEEP TIMER] key and set it to 30 minutes. Fig.1
(2) Press the [VIDEO STATUS] key and [DISPLY] key
<Self-diagnosis Display Mode>
simultaneously, then enter the TEST MODE.
(3) Press the [4] key (Self-diagnosis Display mode) before the
service mode screen disappears. XRAYXRAYNG5NG5OCPOCPNG2NG2
LOBLOBOKOKTIMTIMOKOK
5.1.3 HOW TO EXIT THE SELF-DIAGNOSIS DISPLAY MODESYNCSYNCM:OKM:OKS:OKS:OKHD:NGHD:NG
MEMMEMOKOKAVSWAVSW OKOK
To Save Failure History:
VCDVCDOKOK
Turn off the power by unplugging the AC power cord plug whenAIOAIOOKOKYCYCOKOK
in the self-diagnosis display mode.TUNTUNOKOK
PPPPNG 4NG 4IPIPOKOK
To Clear (Reset) Failure History:
HDMIHDMIOKOK
Turn off the power by pressing the [POWER] key on the remote
control unit when in the self-diagnosis display mode.
5.1.4 FAILURE HISTORYItemItem
Failure history can be counted up to 9 times for each item.When
the number exceeds 9, display will remain as 9. Failure historyDiagnosis
Normal = OK
will be stored in the memory unless it has been deleted.
Abnormal = NG
NOTE:
Only SYNC (with/without sync signals) will be neither countedFig.2
nor stored.
5.1.5 POINTS TO NOTE WHEN USING THE SELF-DIAGNOSIS
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be iagnosed as "Abnormal" and displayed and
counted as "NG".
(1) Temporary defective transmissions across circuits due to
pulse interruptions
2
(2) Misalignment in the on/off timing of power for IC bus
(VCC) when turning on/off the main power.
Diagnosis may be impeded if a large number of items are
displayed as "NG". As such, start self-diagnosis 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
diagnosis reults.
(No.YA093)1-41 |
ACEC
