1-24 (No.YA205)
5.1.6 DETAILS
Self check is performed for the following items:
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Detection item
Display
Detection content
Diagnosis
signal (line)
Detection timing
Low bias line short
protection
LOB
Confirmation of operation of the low bais
(2.5V / 3.3V / 5V / 9V) protection circuit.
Q9822 [REGULATOR PWB]
LB_PRO
Detection starts 3 seconds after the
power is turned on.
If error continues between 400ms the
power is turned off.
Abnormal rise of
temperature in audio
circuit
FAN
Confirmation of the temperature of
audio circuit.
TH6661 [ANALOG SIGNAL PWB]
SDA
Detection starts 3 seconds after the
power is turned on.
If the temperture of 90
°
C is detected for
3 seconds the power is turned off.
Presence of sync signal
SYNC Confirmation of presence of video
sync signal.
M : Main sync signal
S : Sub sync signal
HD : Component sync signal
IC201 [ANALOG SIGNAL PWB]
SDA
Confirmation of presence of sync signal
in video signal.
AC power input
TIM
Not used.
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Main CPU
communication
MSM
Not used.
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Digital tuner
DIGI
Confirmation of reply of ACK signal
which uses I
2
C communication.
[DIGITAL TUNER UNIT]
SDA
If it checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
Main memory
MEM
Confirmation of reply of ACK signal
which uses I
2
C communication.
IC7602 [DIGITAL SIGNAL PWB]
SDA
Same as above.
AV select switch
AVSW Same as above.
IC301, IC501 [ANALOG SIGNAL PWB]
SDA
Same as above.
3 dimensions YC
separator
YC
Not used.
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Multi sound process
AIO
Not used.
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RF tuner
TUN
Confirmation of reply of ACK signal
which uses I
2
C communication.
TU3001 [RECEIVER PWB]
SDA
If it checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
Ghost reduction
GCR
Not used.
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DIST process
IP
Confirmation of reply of ACK signal
which uses I
2
C communication.
IC3001 [DIGITAL SIGNAL PWB]
SDA
If it checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
RGB process
RGB
Confirmation of reply of ACK signal
which uses I
2
C communication.
IC3001 [DIGITAL SIGNAL PWB]
SDA
If it checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
DVI (Digital communication)
DVI
Not used.
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Digital input
HDMI
Not used.
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d u p a
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