LG 50PK950 Training Manual page 149

FRONT IR, POWER LED and MOTION REMOTE RECEIVER SECTION
FRONT IR, POWER LED and MOTION REMOTE RECEIVER SECTION
The following section gives detailed information about the Front IR and
Motion Remote Sensor. The IR board contains the Infrared Receiver,
Intelligent Sensor and Power LEDs section. The Motion Remote Receiver
receives signals from the Motion Remote to manipulate the pointer.
The Power LED Driver and Intelligent Sensor IC communicate with the Main
Board Microprocessor (IC701) via Clock and Data lines.
These boards have no adjustments.
The Front Control Board (IR and Intelligent Sensor) receives its operational
B+ from the Main Board:
• 3.3V_ST from the Main Board. This voltage is generated on the
Main Board (IC400)
• 3.3V_MULTI generated on the Main Board (IC402).
The Front Power LEDs are driven by 2 separate pins from the Main board
SCL/SDA pins 7 and 8.
The IR signal is routed back to the Main Board via pin 1.
Also, the Motion Remote routes it's output signal back to the Main Board
P1001 pin 4.
149 October 2010 50PK950 Plasma