(No.YA682<Rev.001>)
VPT
Printed in Japan
5.1.6 DETAILS
Self check is performed for the following items:
<Page 1 of screen>
<Page 2 of screen>
indicates items not used for services as they are for designing.
5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.
< Explanation of operation >
If error is detected, the power is turned off. Shortly after the power is turned off, POWER LED will be blinked.
When the protection of low bias line short operates, the power cannot be turned on until the power cord takes out and inserts, after the
power is turned off.
Detection item
Display
Detection content
Diagnosis
signal (line)
Detection timing
Low bias line short
protection
LOB
Confirm the operation of the low bais(1V/3.3V/5V/
12V) protection circuit.
1V:
Q9351
[MAIN PWB]
3.3V:
Q9601
[MAIN PWB]
5V:
Q9201
[MAIN PWB]
12V:
Q9301
[MAIN PWB]
LB_PRO
Detection starts 5 seconds after
the power is turned on. If error
continues between 200 ms the
power is turned off.
MAIN MEMORY
MEM Confirmation of reply of ACK signal which uses
I
2
C communication.
IC7003
[MAIN PWB]
SDA
If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
AUDIO
AIO
Confirmation of reply of ACK signal which uses
I
2
C communication.
IC6661
[MAIN PWB]
SDA
If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
RF (ANALOG) TUNER
TUN
Confirmation of reply of ACK signal which uses
I
2
C communication.
TU1001
[MAIN PWB]
SDA
If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
HDMI
HDM
Confirmation of reply of ACK signal which uses
I
2
C communication.
IC8501
[MAIN PWB]
SDA
If it checks whenever I
2
C
communication is performed and
no reply of ACK signal an error
will be counted.
Detection item
Display
Detection content
Detection timing
SYNC SIGNAL
SYN
Confirmation of presence of sync signal in
selected video signal.
The selected video input signal is always
checked and if there is the sync signal, it is
displayed as "OK", and if not as "NG".
For designing
CDN
-
-
For designing
ADS
-
-
For designing
ADH
-
-
For designing
PPL
-
-
For designing
LPF
-
-
For designing
INT
-
-
For designing
FMT
-
-
Type of error
POWER LED flash cycle
Low bias line short protection
Blue turnig on and off at 1 second intervals.
Victor Company of Japan, Limited
Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
