T-CON [LCD CONTROLLER BOARD] REMOVAL
The T-Con IC UC1 receives from the Main Board at CN1 12 Bit and CN2 12
Bit LVDS Signals (Video) which it processes into TFT Drive Signals. It delivers
its output signals through connectors CN4 and CN5 to control the LCD Panel. 12V is supplied to the T-Con Board on connector
CN1 from the Main Board (easily measured at fuse F1).
Diode LD1 is a boot up indicator and is helpful in troubleshooting as a
quick indication of a loss of supply and or a Boot up problem. The main purpose
of LD1 is to aid in the firing of the EEFL back-lights when room light is
minimum.It helps to excite the selenium in the EEFL lamp which is highly
sensitive to Blue light. Once this lamp fires, it helps to excite the others.
There is one regulator that creates 1.19V developed at pin 2 (Center
Leg) of U11. U5 is a DC to DC converter IC which develops the Panels driver
voltages. 16V, 3.3V, -5V and 26V. These
voltages can be read at the ribbon connector or attest points on the board.
CLICK ON THE PICTURES TO MAGNIFY
Remove the 3 Screws in the T-CON shield and remove the shield.
The two screws shown in the picture below are for the Service Position.
They would have been removed when removing the shield.
Be sure to re-install them if servicing the T-CON PWB.
The two screws shown in the picture below are for the Service Position. They would have been removed when removing
the shield. Be sure to re-install them if servicing the T-CON PWB.
Disconnect CN1, CN2, CN4 and CN5.
To remove the LVDS cables CN1 and CN2;
Press in on the two tabs and slowly rock the cable out of the
connector. (Shown by the arrows in Figure).
To remove the flex cables to the TFT Panel, CN4 or CN5, place a soft
thin object like a fingernail underneath the black locking tab and gently pull
forward.
Flip the lock up and back from the flex cable. Then the flex cable can be easily removed.
