(No.52169)1-55
SECTION 5
TROUBLESHOOTING
5.1
SELF-DIAGNOSIS FEATURE
5.1.1 OUTLINE
This unit comes with the "Self-diagnosis" 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
2
C bus and
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF-DIAGNOSIS DISPLAY
MODE
(1) Press the [SLEEP TIMER] key and set it to 30 minutes.
(2) Press the [VIDEO STATUS] key and [DISPLY] key
simultaneously, then enter the TEST MODE.
(3) Press the [4] key (Self-diagnosis Display mode) before the
service mode screen disappears.
(4) Press the [MTS] key to enter Page 2 of the Self-diagnosis
Display mode.
*Use the [MTS] key to toggle between Page 1 and Page 2.
NOTE:
The remote control unit attached to this set does not
contain the [MTS] key. To perform the procedure (4), use
a remote control unit that contains the [MTS] key.
5.1.3
HOW TO EXIT THE SELF-DIAGNOSIS DISPLAY MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the self-diagnosis 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-diagnosis 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.
Fig.1
Fig.2
TEST MODE
1. I2C STOP
TEST MODE
2. STATUS DISP.
4. SELF-CHK
Item
Item
LOB
LOB
SYNC
SYNC
MEM
MEM
VCD
VCD
AIO
AIO
TUN
TUN
PP
PP
OK
OK
HD:NG
HD:NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
TIM
TIM
S:OK
S:OK
AVSW
AVSW
BS
BS
YC
YC
GCR
GCR
IP
IP
OK
OK
M:OK
M:OK
OK
OK
OK
OK
OK
OK
OK
OK
NG 4
NG 4
Diagnosis
Normal = OK
Abnormal = NG
* As "SYNC" is not counted, the number of failures is not displayed.
<Self-diagnosis Display Mode (Page 1)>
TAM
TAM
MEMP
MEMP
DDT
DDT
FAN
FAN
DVI
DVI
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
PNL
PNL
TMP
TMP
TEMP
TEMP
DDP
DDP
AD
AD
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
<Self-diagnosis Display Mode (Page 2)>
Содержание PD-42WV74
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