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1-50 (No.YA004)
5.1.6 DETAILS
Self-diagnosis is performed for the following items:
•
PAGE 1
•
PAGE 2
Item
Display
Description of detection
Diagnosis
signal (line)
Means of detection
LOW B LINE
SHORT
PROTECTION
LOB
Was Low B line short protector activated?
No. of times short circuit protection is
triggered
[POWER PWB]
(3.3V / LCD 5V / 9V / 13V / AVCC)
PROTECTOR Detection starts 3 seconds upon power on
Turns off power if NG is detected within
200ms
TIMER
TIM
Did power supply frequency fluctuated
from:
50Hz
→
60Hz
60Hz
→
50Hz
Number of counts
[POWER PWB (PC9001)]
AC
Regularly detects power supply frequency
by AC pulse counts and monitors
frequency fluctuations other than
instances immediately after reset
WITH / WITHOUT
SYNC SIGNALS
SYNC Are there synchronized signals?
HD: Color difference synchronized signals
M: Main Synchronized signals
S: Sub-synchronized signals
[IC1211]
SDA
Checks whether there are synchronized
signal in video signal
MEMORY
MEM
Is ACK returned during I
2
C transmission?
[IC1703]
SDA
Monitors upon every I
2
C transmission and
counts if ACK is not returned
AV SWITCH
AVSW Same as above [IC1301]
SDA
Same as above
VIDEO CHROMA
VCD
Same as above [IC7301]
SDA
Same as above
AUDIO
PROCESSING
AIO
Same as above [IC6501]
SDA
Same as above
3D Y/C
SEPARATION
YC
Same as above [IC3001]
SDA
Same as above
RF TUNER
TUN
Same as above [TU1101]
SDA
Same as above
MULTI-SCREEN
PROCESSING
PP
Is ACK returned during I
2
C transmission? SDA
Monitors upon every I
2
C transmission and
counts if ACK is not returned
DIST
PROCESSING
IP
Same as above [IC201]
SDA
Same as above
HDMI
HDMI
Not used (Only display)
----
----
Item
Display
Description of detection
Diagnosis
signal (line)
Means of detection
DEFECTIVE AUDIO
OUTPUT PART
AP1
Detects short and abnormal temperature
in audio circuit.
[IC6641]
SDA
Detection starts 3 seconds upon power
on. Performs detection every 16ms. If NG
lasts for 300ms, audio output part is defec-
tive.
Controls [ /AMP_RST] to [L]
→
(0.5S)
→
[H].
Monitors again, and turns off power if the
defect is not corrected within 3 seconds.
AP2
Fault load of audio output part.
[IC6641]
DEVICE DRIVE
COLOR
MANAGEMENT
DDT
Is ACK returned during I
2
C transmission?
[IC401]
SDA
Monitors upon every I
2
C transmission and
counts if ACK is not returned.
A-D CONVERTER
AD
Is ACK returned during I
2
C transmission?
[IC001]
SDA
Monitors upon every I
2
C transmission and
counts if ACK is not returned.
Содержание LT-32WX84
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