Panasonic PT56DLX75 - 56" DLP TV, Manual, Page: 99 / 107

-9-
+3.3V
5) IC4265 (GC4U) communication Error detection circuit
MAIN C.B.A. (CIRCUIT BOARD DG)
SOS: No acknowledge reply
SOS: Abnormal rotation
(NTSC: less than 60Hz or more than 360Hz)
SOS: 0V on +3.3V line
SOS: 0V on DT+9V line
MAIN C.B.A. (CIRCUIT BOARD DG)
4) Abnormal Voltage (+3.3V line) for Main C.B.A. (Circuit Board DG) detection circuit
Normal
SOS
Normal
CW INDEX
SOS
PDG4 PL1
DMD DRIVE C.B.A.
(CIRCUIT BOARD L)
COLOR WHEEL C.B.A.
(CIRCUIT BOARD CW)
COLOR WHEEL UNIT
MAIN C.B.A. (CIRCUIT BOARD DG)
16 16
PL2
PL3
PCW1
3 3
IC1102
(MAIN MICROCONTROLLER)
CW DET CPLD 110
6) Abnormal Color Wheel rotation detection circuit
PDG1 PA
16
21 21
IC6901
COLOR WHEEL
MOTOR
IC6903
(COMPARATOR)
PHOTO
SENSOR
V-REF
4
IC6006
(BUFFER)
IC6004
(DMD CONTROL) IC6011
(MOTOR DRIVE)
16 4
14 6
IC4200
40
1
3
IC6902
(OP AMP)
4
1
3
5
180Hz (NTSC)
150Hz (PAL/SECAM)
3V
84
85
I2C SERIAL CLOCK2
I2C SERIAL DATA2
acknowledge
IC4258
(MAIN VIDEO SIGNAL PROCESS)
IC1102 (MAIN MICROCONTROLLER)
IC1102 (MAIN MICROCONTROLLER)
I2C SERIAL CLOCK2
I2C SERIAL DATA2
IC4257
(SUB VIDEO SIGNAL PROCESS)
I2C SERIAL CLOCK2
I2C SERIAL DATA2
25
26
65
64
IC4265
(VIDEO SIGNAL PROCESS)
I2C SERIAL CLOCK2
+3.3V SENS
I2C SERIAL DATA2
A3
A4
63
DT+9V
MAIN C.B.A. (CIRCUIT BOARD DG) BASE C.B.A. (CIRCUIT BOARD A)
3) Abnormal voltage (+9V line) detection circuit
Normal
SOS
IC1102 (MAIN MICROCONTROLLER)
+9V SENS
108
+12V
+9V
REG
2 1
IC2803
PDG1 PA
16
25 25
26 26
BASE C.B.A. (CIRCUIT BOARD A)
+12V
+3.3V
REG
2 1
IC2804
AC2
M