Panasonic PT-56LCX70 Service Manual page 24

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
[LAMP Indicator eight blinks] LAMP Fan stops detection circuit
[LAMP Indicator nine blinks] OPT Fan stops detection circuit
[LAMP Indicator ten blinks] Front Fan or Rear Fan stops detection circuit
[LAMP Indicator eleven blinks] Rear Fan or Front Fan stops detection circuit
[LAMP Indicator twelve blinks] Rear Jack P.C.B. connection error detection circuit
IC6004
(TV MICROCONTROLLER)
LAMP FAN SOS
OPT FAN SOS
FRONT FAN SOS
REAR FAN SOS
NORMAL
REAR JACK P.C.B.
CONNECTION ERROR
MAIN P.C.B.
FAN SOS
117 29 29
:APPROX. 0V
:APPROX. 0.5V
:APPROX. 1.3V
:APPROX. 2V
:APPROX. 2.8V
:APPROX. 3.3V
Q2754
+9V
Q2752
Q2751
Q2753
FRONT/REAR FAN SD CONTROL
<FROM TV MICROCONTROLLER (IC6004)>
OPT FAN SD CONTROL
<FROM TV MICROCONTROLLER (IC6004)>
REAR JACK P.C.B.
24
CN2751-1
CN2751-2
CN2751-3
IC2751
(+8 V)
DRIVE
+9V 2 4 CN2752-1
5 CN2752-2
CN2752-3
IC2753
DRIVE (+6.0V~ +6.5 V)
CN2754-1
2 4
5 CN2754-2
CN2754-3
IC2754
(+7 V)
DRIVE
2 4 CN2753-1
CN2753-2
CN2753-3
FRONT
FAN
REAR
FAN
OPT
FAN
LAMP
FAN