2009 FALL LCD DV 42LH50
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FRONT CONTROL (IR, INTELLIGENT SENSOR and KEY BOARD) SECTION
FRONT CONTROL (IR, INTELLIGENT SENSOR and KEY BOARD) SECTION
The Front Control PWB (located on the bottom left as viewed from the rear) contains the IR (Infrared
Remote Sensor) and the Intelligent Sensor plus the front Power LEDs.
This board also connects with the Side Key PWB.
This board receives it operating B+ via pin 6 (STBY 5V) and pin 11 (STBY 3.3V) on connector P1.
It is received from the Main PWB via the connector P1200.
The Intelligent Sensor communicates with the Video Processor IC100 via clock and data lines on the
same connector pins 1 and 2.
The IR pulses (5V p/p) are sent to the Microprocessor (same IC100) via pin 9.
The Key board connector P3000 is routed to the Ft control board via P2. Then through the front
Control board and out P2 to P1200 pins 4 and 5 and then to the Microprocessor.
Finally, the front Power LEDs are controlled by P1 connector pin 12 and pin 8.
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