Connector Functions - Samsung 820DXn Service Manual

6-9. Connector Functions

Connector
LVDS signals transmitted from the main circuit to the panel
CN405
* When a problem occurs: A blank screen is displayed or noise occurs on the screen.
The control signals for the power and speed of Fan1
CN406
* When a problem occurs: The message "CHECK COOLING SYSTEM" is displayed as an OSD.
The control signals for the power and speed of Fan2
CN407
* When a problem occurs: The message "CHECK COOLING SYSTEM" is displayed as an OSD.
The control signals for the power and speed of Fan3
CN408
* When a problem occurs: The message "CHECK COOLING SYSTEM" is displayed as an OSD.
Supplies the power from the main SMPS board to the main circuit board.
CN602
* When a problem occurs: A blank screen is displayed and the LED indicator at the front is not
turned on because no power is supplied to the main circuit.
Turns the backlight on and controls its brightness and receives the lamp error signals.
CN404
* When a problem occurs: The LCD backlight is not turned on or becomes darker. The LED
indicator at the front changes from green to amber and then turns off in amber.
Operates when a function key at the front is pressed.
CN402
* When a problem occurs: The function keys at the front do not operate or the LED indicator at the
front may be turned off.
Receives TMDS signals and various control signals from the network board and displays the
MagicNet source screen.
CN401
* When a problem occurs: The network board does not operate or the MagicNet screen is not displayed.
Receives power from the main SMPS
CN931
* When a problem occurs: MagicNet does not operate because the power is not supplied to the
sub SMPS, and the main circuit board is reset repeatedly.
Supplies 12V and 5V powers to the network board
CN902
*When a problem occurs: The network board does not operate or the MagicNet screen is not displayed.
Description
6. Wiring Diagram
6-9