How to remove the power board, switch unit, Bezel, Self check function, Error display - Sony KDL40R450A, KDL46R450A LCD TV

REPLACING THE POWER SUPPLY BOARD
Remove the screws and detach brackets.
Remove 5 screws from the Power Supply Board.
Disconnect the Power Cord from the Power Supply Board
Disconnect all the connectors to detach from the Rear Cover.
Confrm if the latest version of the Software is installed and if not, you must update it.

REMOVING THE SWITCH UNIT
Disconnect FFC cable from Switch Unit.
Insert finger on the free space on the left side pocket where Switch Unit is located and pull to detach from Rear Cover.

REMOVING THE BEZEL

Remove the screws and detach the Power Cord.

Disconnect connectors from the TCON and H Board.

Remove the harness assembly carefully.

Gently lift up the cover and dettach from LCD Panel.

Flip the TV face up and press the gap between the LCD Panel and Bezel.

Gently lift up and unhook the Bezel to detach.

DIAGNOSING THE ERROR

Before servicing the Television:

1. Verify the TV has the symptom the customer indicated.

2. Check to see if the latest Software is installed.

a. If not, install the latest version.

3. Determine the replacement part required.

VIEWING THE SELF CHECK DIAGNOSIS HISTORY

When an error is detected, the Self Check screen records the number of times the error occurred. This is helpful in confirming past occurrences of an error and for determining if an error is intermittent when the customer is

not sure what is causing the television to shut down. If the screen displays

a “0”, no error has occurred.

1. Press the “Power to” turn on the TV and then turn it off again.

2. Press the following buttons on the Remote Commander within 1second of each other:

"Display > Channel-5 > Volume(--ve) > Power"

This differs from accessing Service Adjustments Mode (Volume +).

Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location.

1. Confirm the symptom from the customer. RED Dot: (Primary) Most likely defective part.

2. Select that symptom from the chart. BLUE Triangle: (Secondary) Possible defective part.

3. Bring the primary component listed for that symptom.

4. Follow the associated flowcharts in the Training Manual to isolate the board.

5. Chart Color Code.

To access the most recent version of the Triage documents for the models listed in this manual, login into the Sony Authorized Service Portal.

Click on the pictures to magnify