Electro help: KDL40R420, KDL32R420 – Sony LCD TV – repair procedure, software update, disassemble procedure

KDL-32R420B RM-YD092 US/CND

KDL-40R470B RM-YD092 US/CND - ITC3 Chassis

TROUBLESHOOTING

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.

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

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

Info(i+) > Channel (5) > Volume (--) > Power

NOTE: This differs from accessing Service Adjustments Mode (Volume +)

Click on the pictures to magnify

TRIAGE CHART

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

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.
5. Chart Color Code.
4. Follow the flowchart to isolate the board .

Chart Color Code

REPAIRING THE TV
If the latest Software does not correct the issue, complete the following:
1. Verify the television has the symptom the customer indicated.
2. Replace part causing the symptom.
3. Install the latest version of Software (Required for ALL repairs).
4. Perform the required service adjustments and checks.
5. Verify the repair resolved the issue.

REMOVING THE TABLE TOP STAND
1. Place TV face down on a ﬂat and steady surface.

2. Remove all screws and grasp as shown to detach the Table Top Stand.

REMOVING THE LOWER COVER
1. Locate and remove all screws from the Lower Cover.

2. Locate the areas shown in the illustration and detach the Lower Cover from the TV.

REPLACING THE MAIN BOARD
The Main Board used in these models is available for repair.

1. Slide the Side Bracket and Under Bracket to detach from Main Board.

2. Locate and disconnect the connectors. Then remove all screws from the Main Board and lift to detach.

3. Install the new Main Board, connectors and screws.
4. Update the Software.
After ALL repairs UPDATE the SOFTWARE to the latest version.

Software update procedure

a. Insert the USB device with the latest Software into one of the TVs’ USB ports.
b. Connect TV to AC power.
c. Wait at least 20 seconds.
d. Press the Power on the remote to turn ON the TV.
e. Wait until the Software update is completed.

5. To access Service Mode, turn TV ON and OFF again then press the following buttons within 1 second of each other:

Info (i+) > Channel (5) > Volume (+) > Power

6. Press the DN until Panel Selection is selected.

7. Press Left or Right to select the correct Panel Code for the TV model. (Use the table below for reference)

8. Locate the Serial Number for the TV on the side of the Rear Cover.

9. Press DN until SERIAL NUMBER EDIT is selected.

10. Press RIGHT to be able to select the first digit.

11. Press UP or DOWN to select numbers and then RIGHT to move to the next digit until Serial Number is complete.

CAUTION: The Serial Number can only be selected once. Be sure to verify the information is correct before saving the changes.
12. When the complete Serial Number displays, press (+)

13. On the confirmation screen, press LEFT to select YES and then (+)