(No.YA509)1-23
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(5V/12V/
13.5V/14V) protection circuit.
5V: Q9201
[MAIN PWB]
12V: Q9301 [MAIN PWB]
13.5V: Q9505
[POWER PWB]
14V: Q9503
[POWER 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 Not used ---- ----
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.
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 - -
Type of error POWER LED flash cycle
Low bias line short protection Red turnig on and off at 1 second intervals.
MAIN CPU error detection Red turnig on and off at 2 second intervals.
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