Panasonic PT-56DLX25 Service Manual page 54

PT-56DLX75 / PT-61DLX75
Protection circuit
SOS terminal of IC1102 (Main microcontroller)
IC4200 (CPLD)
16 5
1
5
IC4265 (VIDEO SIGNAL PROCESS)
GC4U I2C SERIAL DATA2
1) SOS2 (over voltage detect) detection circuit
FULL-WAVE
RECTIFIER
IC801
SWITCHING
2 9
CONTROL
(FEEDBACK LOOP)
PC800 IC841
FEED
3
BACK
POWER C.B.A. (CIRCUIT BOARD P)
2) Fan1, Fan2 or Fan3 stopped detection circuit
IC1102 (MAIN MICROCONTROLLER)
MAIN C.B.A. (CIRCUIT BOARD DG)
IC1102 (MAIN MICROCONTROLLER)
CW DET(Error No. 6)
40 110
ASIC READY(H) (Error No. 9)
88
I2C SERIAL DATA4 (Error No. 7)
59
I2C SERIAL DATA2 (Error No. 5)
A4 85
T801
22 22 (+12V)
1 9
26 26
POWER
TRANS.
5
R854
R852
SHUNT
1
REG.
R853
BASE C.B.A. (CIRCUIT BOARD A)
SOS: Fan stop
SOS
Normal
FAN SOS
61 15
(Error No. 3) DT+9V SENS
(Error No. 4) +3.3V SENS
(Error No. 8) LAMP DET
MAIN C.B.A. (CIRCUIT BOARD DG)
IC2803
+9V
ATSC+9V
1 2
REG
IC2802
+5V
ATSC+5V
1 2
REG
IC2806
+9V
1 2 TV+9V
REG
IC2804
+3.3V
1 2 TV+3.3V
REG
IC2805
+2.5V
1 2 TV+2.5V
REG
IC2807
DC-DC
TV+3.3V_L
CONVERTER
ATSC+12V
(Over voltage(+15V) Detect)
IC2808
(+7V - +12V)
+12V 2 4
DRIVE
IC2809
(+7V - +12V)
2 DRIVE 4
15
BASE C.B.A. (CIRCUIT BOARD A)
52
(Error No. 1) SOS2
93
(Error No. 2) FAN SOS
61
108
63
27
AC ATOP
89
SOS: over +15V
IC1102
(MAIN MICROCONTROLLER)
SOS
Normal
SOS2
14 14 93
MAIN C.B.A. (CIRCUIT BOARD DG)
PA2-1
PA2-2
PA2-3
PA2-4
PA2-5
PA2-6
PA1-1
PA1-2
PA1-3
14
15
21
25
26
64
9
FAN2
FAN1
FAN3