Mitsubishi LT-55154, LT- 40164, LT-46164, LT-55164, LT-46265, LT-55265 – How to enter the service mode, service mode adjustments, back-up and restore, reset and initialization and more

 

Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

The VLP43, VLP43+ and VLP43++ chassis types. The specific models for each chassis type, dimensions and weight are listed below.

Cold Check
With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal part (i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particularly any exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts having a return path to the chassis should be a minimum of 1Meg Ohm. Any resistance below this value indicates an abnormal condition and requires corrective action.
2. Hot Check ...Use the circuit shown below to perform the hot check test.
1. Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after connection, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2.
2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has reached thermal stabilization. The leakage current must not exceed 0.5 milliamps (mA).

 REMOTE CONTROL USE FOR SERVICE
Many service functions and adjustments are accessed using the Remote Control.

OPTION MENU
1. Press the <MENU> button on the remote control.
2. Press the buttons <2-4-7-0>. The screen will display the Option Menu.
3. Press <EXIT> to quit.

SERVICE LEVEL INITIALIZATION
Service Level Initialization is used to restore all customer menu, video and audio settings to the original factory default condition.
1. Enter the Option Menu <MENU> <2-4-7-0>.
2. Select “Initialize” and <ENTER>

DEACTIVATE VUDU (Software Version 12.08 and higher)
This feature will deactivate the customer’s VUDU on-line subscription. It should be used before TV ownership is changed.
NOTE: This feature is independent of the Initialize function.
1. Enter the Option Menu <MENU><2-4-7-0>.
2. Select “Deactivate Vudu” and <ENTER>.
3. The “Deactivate Vudu” text will momentarily turn red.
4. Press <EXIT> to quit.
5. The TV will register as deactivated the next time it is connected to the internet.

DIGITAL SIGNAL INFORMATION
Information on the currently selected digital channel can be displayed on screen.
Note: A digital channel received using the Antenna Input must be selected first.
1. Select the Antenna Input and an active digital channel.
2. Enter the Option Menu <MENU> <2-4-7-0>.
3. Select “Digital Signal Strength” and <ENTER>.
4. Press <EXIT> to quit.

RESET / INITIALIZATION

Many customer generated symptoms, intermittent symptoms or no symptom found can be resolved by using the various Reset and Initialization options. Before visiting the customer’s home ask the customer 1st perform a System Reset by pressing the <POWER> button on the front panel and holding it for 8 seconds. If this does not resolve the issue, they can perform an A/V Reset by pressing the <INPUT> + <VOL e> buttons on the front panel at the same time and holding for 10 seconds. Then, if necessary, perform a user level Initialization by pressing <MENU><1-2-3> <ENTER> with the remote. The customer should be made aware when settings and/or options will be reset. For more information, see the chart below

BACKUP / RESTORE ISF SETTING

VLP43+ and VLP43++ models - If the customer has calibrated the ISF (ADV) video settings, the settings data can be backed up on a USB memory device. If the settings are lost due to a Reset or Initialization procedure, PWB-MAIN replacement or other reasons, the settings data can be restored.
Backup ISF Settings.
1. Insert a empty USB memory device into the USB slot.
2. Press the <MENU> button on the remote control. The Customer Menu will appear.
3. Press the <2-4-5-7> buttons. The Service Menu will appear.
4. Press the <0> button. The Data Selection Menu will appear. See below.

5 Use the <Up or Dn> buttons to select “BACKUP AND RESTORE ISF SETTING” and press <ENTER>.
6 Use the <Up or Dn> buttons to toggle to "Backup ISF Settings to USB” (Default)

7. While "Backup ISF Settings to USB” is displayed, press <ENTER>. The screen will flash the message "Backup completed."

8. Remove the USB memory device and store it in a safe place.
9. Press <MENU> to exit

Restore ISF Settings.
1. Insert the USB memory device with the backup data into the USB slot.
2. Press the <MENU> button on the remote control. The Customer Menu will appear.
3. Press the <2-4-5-7> buttons. The Service Menu will appear.
4. Press the <0> button. The Data Selection Menu will appear. See above.
5. Use the <Up or Dn> buttons to select “BACKUP AND RESTORE ISF SETTING” and press <ENTER>.
6. Use the <Up or Dn> buttons to toggle to “Restore ISF Settings From USB.”
WARNING: DO NOT press <ENTER> while "Backup ISF Settings to USB" is displayed. The data on the USB will be overwritten and lost.

7. While “Restore ISF Settings From USB” is displayed, press <ENTER>. The screen will flash the message "Restore completed." The TV will then turn off.

8. Remove the USB memory device before turning the TV back on.

To SET SCREEN SIZE

The same PWB-MAIN is used for different screen sizes within a chassis family. When a PWB-MAIN is replaced, the screen size must be set up. Failure to setup the correct screen size will result in poor picture performance.
1. Press the <MENU><2-4-5-7> buttons. The Service Menu will appear.
2. Press the <0> button. The Data Selection Menu will appear.
3. Use the <Up or Dn> buttons to select “SET SCREEN SIZE” and press <ENTER>.
4. Use the <Up or Dn> buttons to toggle to select the correct screen size and chassis of the model being serviced.
5. Press <ENTER>.
6. The Screen Size indication will flash Red momentarily to indicate the selection has been saved.

LED INDICATIONS AND SELF DIAGNOSTICS

The front panel Status LED provides an indication of the set’s operation and the possible cause of a malfunction.

A blinking red and yellow Status LED will indicate an Error Code that can help determine the cause of a circuit failure.
• The number of Red blinks indicates the value of the MSD (tens digit) of the Error Code.
• The number of Yellow blinks indicates the value of the LSD (ones digit) of the Error Code.
Example: If the Error Code is “27”, the LED will continuously blink Red two times, followed by blinking Yellow seven times.

To perform a System Reset, press and hold the side Power button for 10 seconds. Or, unplug the set for 10 seconds then restore power

Error codes and error code log

ERROR CODE LOG
The Error Code Log may be helpful to retrieve the code for an error that occurred in the past.
To access the Error Code Log: Press <MENU> <3-5-6-4>

Error Code Definitions
• PAGE - Current page number
• CURRENT TIME - total hours of operational use.
• USAGE TIME - usage hours when the error occurred.
• CODE - the specific Error Code that occurred.
• STATUS: HAPPENED - Indicates an error was recorded.
Press <CANCEL> to erase the Log.
NOTE: The Error Code Log is intended as a reference tool and is not meant to be used as a final determination of a defective part.

SOUND PROJECTOR TRANSDUCER TEST
This procedure will test will each of the TV’s speakers individually using an internal white noise generator.
1. Press the <MENU> button on the remote control. The Customer Menu will appear.
2. Press the <2-4-5-7> buttons. The Service Menu will appear.
3. Press the <0> button. The Data Selection Menu will appear. See below.

4. Use the <Up or Dn> buttons to select “SOUND PROJECTOR TRANSDUCER TEST” and press <ENTER>. The Sound Projector Transducer Test Menu will be displayed. A tone will automatically cycle from one speaker to the next as indicated on screen. Follow the instructions to manually cycle the tone.
5. Press <EXIT> or <MENU> to exit.
NOTE: The VLP43 chassis has 12 speakers. The menu will show 16 speakers with 4 greyed out.
The VLP43++ chassis includes left and right full range speakers.