Slide 54
5.SOS Detect Circuit Explanation (21)
All connections of C and A board are monitored by IC9300 in the A board. If it is normal, AG3 and
W28 pins detect the voltage of 3.3V.
If the one of connections at least will be disconnected, the IC9300 doesn’t output the control signal
for SS. Consequently, SS board outputs SOS8_SS signal causing the unit shutdown and the power
LED to blink 8 times.
8 Blinks Error Code
1. Failure of SS board
2. Disconnection of PSS/SS(SS2) board and Panel
3. Disconnection of C board and A board
4. Disconnection of SC board and A board
These conditions can cause the TV to shutdown and the power LED to blink 8 times
IC5000
ASIC
A
To IC8000
A/D Input
C3
P3.3V
A31
C10
SOS_PRIO2
12
Panel_SOS
C2
C1
54
1
55
2
1
55
3
54
55
1
2
55
1
3
40
33
8
IC9300
PD6H
1
A32
AG3
W28
C1_3.3V_DET
C2_3.3V_DET
C20
C18
C28
C21
C31
C36
C26
10
SS control
No signal
SOS8_SS
UEH/USL/USH
/UML/UMH
TC-P50/55/60/65ST60
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