Panasonic S Series - Page 52

Slide 51
5.SOS Detect Circuit Explanation (18)
All connections of C and A board are monitored by IC9300 in the A board. If it is normal, E27 pin
detects 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 6 times. (because there is the detection of 0.8V duration.)
6 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 6 times
TC-P42S60
IC5000
ASIC
A
To IC8000
A/D Input
P3.3V
A31
C10
SOS_PRIO2
12
Panel_SOS
C2
C1
54
1
55
2
1
55
54
55
1
2
55
1
1
IC9300
PD5L
A32
E27
C1_3.3V_DET
C2_3.3V_DET
C20
C21
C22
10
SS control
No signal
SOS8_SS
552
68 1467
AND