Advertisement
5.1
SELF-DIAGNOSIS FUNCTIONS
• This model has self-check functions that inform of the failure of the TV by detecting abnormality.
• Operational state is always monitored and the identified is memorized on the record.
Therefore, diagnosis may be prevented against expectations if "NG" are indicated in many items. When recurrence of symptoms can
be predicted, erase (reset) the history of failure and allow the unit to again record the results of diagnosis.
5.1.1 HOW TO ENTER THE SELF-DIAGNOSIS MODE
(1) Set the < SLEEP TIMER 30 MIN. > with [SLEEP TIMER]
key. (Fig.1)
(2) During the < SLEEP TIMER 30 MIN. > display, press
[DISPLAY] key and [VIDEO STATUS] key at the same time.
(3) Then < TEST MODE > screen is displayed. (Fig.2)
(4) Press [ 4 ] key then < SELF-CHECK > screen is appear.
(Fig.3)
5.1.2 HOW TO EXIT FROM THE SELF-DIAGNOSIS MODE
• With initialization
By using the remote control unit, turn the power off. At this
time, the failure record is cleared.
• With not initialization
(1) Take off the AC plug from the wall outlet. At this time, the
failure record is not cleared.
(2) Press the [BACK] key the SELF-CHECK screen return to
TEST MODE screen.
5.1.3 EXPLANATION FOR ACTIVATION OF SELF-DIAGNOSIS
FUNCTIONS
• The latest failure is stored on the record at the end.
The failure record for each check item is counted to the
number of 9 at the maximum, When more than 9 failures are
stored on the record, the counter remains stopped at 9.
• SYNC is neither counted nor stored in memory.
• Because of the timing of Vcc start-up and shut-down of the IC
2
connecting to the I
C bus during which the power is turned on
and off, the operation may be interpreted as an error.
In order to avoid the misinterpretation, the self-check functions
should be started at about 3 seconds after the power is turned
on.
Indication
Check item
XRAY
X-ray radiation protection
OCP
B1 over-current protection
LOB
Low B short protection
SECTION 5
TROUBLESHOOTING
Details of detection
------
B1 over-current is detected.
Q971 : DEF & CONVERGENCE OUT
PWB
Operation of low B short protection
circuit.
Q1961(5V), Q1962(9V) : MAIN PWB
SLEEP TIMER
30 MIN.
Fig.1
TEST MODE
1. I2C STOP
2. STATUS DISP
4. SELF-CHK
5. CONVER OFF
ROM CORRECTION : ACT
ROM VER. : MN102H75
Fig.2
ITEM
RESULT
COUNT
XRAY
OK
OCP
NG2
LOB
OK
TIM
OK
SYNC
M:OK
S:OK
HD:OK
MEM
OK
AVSW
OK
VCD
OK
AIO
OK
YC
OK
TUN
OK
DET
OK
IP
NG7
HDMI
OK
SPRT
OK
Fig.3
SELF-CHECK SCREEN
Method of detection
------
At about 3 seconds after the power is turned
on, the self-check function starts. If NG is
detected for 200ms, the power is turned off
automatically.
At about 3 seconds after the power is turned
on, the self-check function starts. If NG is
detected for 200ms, the power is turned off
automatically.
(No.YA173)1-59
Advertisement
