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5.1.6 DETAILS
Self check is performed for the following items:
Detection item
Display
Low bias line short
LOB
protection
MAIN MEMORY
MEM
AUDIO
AIO
RF TUNER
TUN
HDMI
HDM
SYNC SIGNAL
SYN
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.
Type of error
Low bias line short protection
< 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 content
Confirm the operation of the low bais(5V/12V/14V/16V/
24V) protection circuit.
5V:
Q9201
[DIGITAL PWB]
12V:
Q9301
[DIGITAL PWB]
14V:
Q9503
[POWER PWB]
16V:
Q9505
[POWER PWB]
24V:
Q9506
[POWER PWB]
Confirmation of reply of ACK signal which uses I
communication.
IC7002
[DIGITAL PWB]
Confirmation of reply of ACK signal which uses I
communication.
IC6002
[DIGITAL PWB]
Confirmation of reply of ACK signal which uses I
communication.
TU1001
[ANALOG PWB]
Confirmation of reply of ACK signal which uses I
communication.
IC8502
[DIGITAL PWB]
Confirmation of presence of sync signal in selected
video signal.
IC7001
[DIGITAL PWB]
Diagnosis
signal (line)
PROTECTOR Detection starts 3 seconds after
2
C
SDA
2
C
SDA
2
C
SDA
2
C
SDA
POWER LED flash cycle
Power LED turnig on and off at 1 second intervals.
Detection timing
the power is turned on. If error
continues between 200 ms the
power is turned off.
Detection starts 3 seconds after
the power is turned on.If it checks
2
whenever I
C communication is
performed and no reply of ACK
signal an error will be counted.
Detection starts 3 seconds after
the power is turned on.If it checks
2
whenever I
C communication is
performed and no reply of ACK
signal an error will be counted.
Detection starts 3 seconds after
the power is turned on.If it checks
2
whenever I
C communication is
performed and no reply of ACK
signal an error will be counted.
Detection starts 3 seconds after
the power is turned on.If it checks
2
whenever I
C communication is
performed and no reply of ACK
signal an error will be counted.
---
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".
(No.YA655<Rev.001>)1-19
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