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(No.YA092B)1-35
5.1.6 DETAILS
Self-check is performed for the following items.
Check item Display Description of detection
Diagnosis
signal (line)
Means of detection
Low bias line short
protection
LOB Low bias line (9V / 5V) short protector
activated.
Confirm the operation of the low bais
protection circuit.
[Q2802 /Q2801] (REGULATOR PWB)
Protector Detection starts 3 seconds upon power
on Turns off power if NG is detected
within 400ms.
Fan lock (stop) FAN Confirmation of operating stop of heat
cooling fan.
[IC8005 : 1 / 2 / 4 / 5-pin]
(FAN CONTROL PWB)
Protector Detection starts 3 seconds upon power
on Turns off power if NG is detected
within 250ms.
AC timer clock TIM Not used ---
---
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 video sync
signal.
MAIN CPU
communication
MSM Confirmation of ACK (response) signal
which used sync communications with
Chassis CPU.
[IC7601] (DIGITAL SIGNAL PWB)
WAKE If it checks whenever sync
communication with SHM performed and
no reply of ACK signal an error will be
counted.
Digital tuner DIGI Not used --- ---
Memory for chassis CPU
MEM Confirmation of reply of ACK signal which
used I
2
C communication.
[IC7602] (DIGITAL SIGNAL PWB)
SDA
If checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
AV switch AVSW Same as above
[IC501] (ANALOG SIGNAL PWB)
SDA Same as above
3D YC separation
YC Same as above
[IC1001] (DIGITAL SIGNAL PWB)
Audio process
AIO Same as above
[IC1140] (RECEIVER PWB)
RF tuner TUN Same as above
[TU1101] (RECEIVER PWB)
Ghost reduction GCR Not used ---
---
DIST process IP Confirmation of reply of ACK signal which
used I
2
C communication.
[IC3001] (DIGITAL SIGNAL PWB)
SDA If checks whenever I
2
C communication
is performed and no reply of ACK signal
an error will be counted.
RGB process RGB Same as above
[IC4001] ((DIGITAL SIGNAL PWB)
DVI transmission DVI Not used --- ---
Digital input receive HDMI Confirmation of reply of ACK signal which
used I
2
C communication.
[IC8001] (DIGITAL SIGNAL PWB)
SDA If checks whenever I
2
communication is
performed and no reply of ACK signal
an error will be counted.
35


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