Panasonic PT52LCX66 Service Manual - Page 24
Lcd Drive P.c.b.
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PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16 3) Abnormal voltage (DT+5V line) detection circuit IC6001 (MAIN MICROCONTROLLER) Normal DT+5V IC1102 +5V 2 REG 1 +9V SOS +5V SENS 108 SOS: 0V on DT+5V line MAIN P.C.B. 4) IC5001 (GC4PRO) communication error detection circuit IC5000 (MAIN VIDEO SIGNAL PROCESS) I2C SERIAL CLOCK0 82 I2C SERIAL DATA0 81 IC5801 (HDMI INTERFACE) I2C SERIAL CLOCK0 28 I2C SERIAL DATA0 27 acknowledge IC6001 (MAIN MICROCONTROLLER) 84 I2C SERIAL CLOCK0 85 I2C SERIAL DATA0 IC5001 (DIGITAL VIDEO SIGNAL PROCESS) I2C SERIAL CLOCK0 A23 I2C SERIAL DATA0 B22 SOS: No acknowledge reply MAIN P.C.B. 5, 6) Temperature Sensor error (shorted, open, or abnormal) detection circuit IC6001 (MAIN MICROCONTROLLER) I2C SERIAL DATA 117 I2C SERIAL CLOCK 116 IC2301 (LCD MICROCONTROLLER) CN5700 CN2502 19 18 19 18 I2C SERIAL 35 DATA 36 I2C SERIAL TEMPERATURE DATA1 64 2 1 CLOCK CN2301 P2821 R2821 TEMPERATURE SENSOR 2 1 MAIN P.C.B. LCD DRIVE P.C.B. THERMISTOR 2 P.C.B. 7) Clogged air filter detection circuit IC2702 +9V 2 DRIVE 4 IC6001 (MAIN MICROCONTROLLER) I2C SERIAL DATA 61 I2C SERIAL CLOCK 61 MAIN P.C.B. SOS Normal IC2301 (LCD MICROCONTROLLER) I2C SERIAL CN5700 CN2502 19 18 19 18 35 36 DATA I2C SERIAL FILTER ERROR DETECTION 62 CLOCK IC2705 3 1 2 LCD DRIVE P.C.B. FAN1 CN2701-1 CN2701-2 CN2701-3 24
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