MITSUBISHI LT-40133 - LT-46133 - LT-52133 SERVICE MODE, ERROR CODES AND POWER SUPPLY CIRCUIT

MITSUBISHI LT-40133 - LT-46133 - LT-52133 SERVICE MODE, ERROR CODES AND POWER SUPPLY CIRCUIT

MITSUBISHI  LT-40133 - LT-46133 - LT-52133 

FLAT PANEL TV SERVICE MODE , ERROR CODES POWER SUPPLY CIRCUIT  

SERVICE MODE

1. Press the “MENU” button on the remote hand unit.
2. Press the buttons “2”, “4”, “7” and “0” in order. (The screen will change to the option menu.)

Item Description
# Initial - Resets Settings
# Power Restore - Power Restore ON/OFF
# Netcommand Software - Displays software version
# Digital Signal Strength - Digital Signal Data (not for analog sources)

Digital Signal Strength
1. Tune to a Digital Channel
2. From the Option menu scroll down and highlight Digital Signal Strength
3. Press Enter

RESET AND INITIALIZATION

SERVICE TIP:
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 to try the System Reset button on the control panel and if this does not resolve the issue, then they can perform an A/V Reset by pressing the Guide + Format buttons on the front panel at the same time. Then, if necessary, perform a user level Initialization by pressing MENU-123-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.

NOTE: During Initialization, the set will reboot. Wait until the Power LED stops flashing before unplugging or powering ON the TV.

Reset Name	RE When to use	How to use	Resulting Action
Remote Control TV Layer Reset	Returns the remote control TV layer to normal operation.	(1) Set the slide switch to TV position. (2) Press and hold the POWER button until it flashes twice then release the button. (3) Enter the code 0 0 9 3 5.	Once the valid code has been entered and confirmed, the remote control has been reset.
Remote Control TV Volume/Mute functions	Returns the volume and mute functions of the remote control to TV volume and mute for TV, Cable/Sat, VCR and DVD layers after the Audio Lock for AV Receiver feature has been used.	1) Set the slide switch to TV position. (2) Press and hold the POWER button until it flashes twice then release the button. (3)Enter the code 9 9 3 VOL UP.	The remote will now operate the TV's volume and mute when the slide switch is in the TV, CABLE/SAT, VCR or DVD positions.
A/V Memory Reset, by individual input	When the audio and or video settings for a single input seems to incorrect	MENU --> Audio/Video--> AV Reset	All Audio and Video settings for the individual input are reset except for the Listen To, Language, Balance and Closed Caption settings.
A/V Reset, all inputs	To reset audio and video adjustments for all inputs to the original factory settings..	While viewing the TV, press the front panel buttons GUIDE + FORMAT at the same time.	All Audio and Video settings are reset to the factory default settings. No other menu options are changed.
System Reset	To reset the TV when it does not turn on or off, does not respond to the remote control, front panel buttons or has other unusual symptoms	Press the SYSTEM RESET button on the front panel with a pointed object such as a pencil or paperclip.	TV Micro Re-boots. Note: The changes made during the current TV-On period may be lost. All other previous user settings will not be lost.
Initialize User Level	To reset all customer settings except V-Chip	Press MENU - 123 - ENTER	All customer menu options and A/V settings except V-Chip are reset to factory default.
Initialize - Service Level	To reset all customer settings	MENU - 2470. Highlight INITIALIZE and press ENTER	All customer menu options and A/V settings are reset to factory default.
V-Chip Password Bypass	If V-Chip password is not known	Press QV + 9 at the same time.	Password will be bypassed. If in the V Chip menu, enter a new password.
Unlock Front Panel	To unlock the front panel if it has been locked in the V-Chip Menu.		Front Panel becomes operational. Other V-Chip settings not changed. Note: Cannot be performed while in the Low Power mode and the set is Off.

LED Indicator Diagnostics
The front panel LEDs provide an indication of the set’s operation, and the possible cause of a malfunction. There are two
front panel LEDs, “Power” and “Status”. The LED display shows the current status or indicates a possible malfunction.

NORMAL LED INDICATIONS

POWER/TIMER LED	STATUS LED	CONDITION
Off	Off	Off (standby mode)
Blinks Blue (Fast)	Off	Initializing (10~65 seconds) (AC off)
Blue	Off	Power On
Blink Blue (Slow)	Off	Power On Timer is set

ABNORMAL LED INDICATIONS

POWER/TIMER LED	STATUS LED	CONDITION
Off	Blinks Red	Fan stopped (LT-46244/LT-52244 Only)
Off	Red	Circuit failure (short) LCD PON-short or Inverter short LVDS cable disconnected, chassis to panel.

Error Code Operational Check
Note: The TV must be in “Shut Down” and not have been switched Off, to perform the Error Code Operational Check. When the TV is switched Off, the code automatically resets to “12” No Error. Pressing the front panel “INPUT” and “MENU” buttons at the same time, and holding for 5 seconds, activates the Error Code Mode. The “POWER LED” flashes denoting a two digit Error Code, or indicating no problem has occurred since the last Initialization.
Note: The front panel buttons must be used, NOT those on the Remote Control.
# The number of flashes indicates the value of the MSD (tens digit) of the Error Code.
# The flashing then pauses for approximately 1/2 second.
# The LED then flashes indicating the value of the LSD (ones digit) of the Error Code.
# The Error Code is repeated a total of 5 times.

(EXAMPLE) - When the error code is 35, the LED flashes as follows.

Error Code	Description	CONNECTOR
12	No error since last power On
27	Inverter short detected (IC7A01 pin 116 = High when short)	PB –PD -PF
28	FPGA download failure (IC7A01 pin 44 = Low when short)
29	FRC communication error (VLP38+/VLP38++) - (3.3V-SDA&SCL)	VR
35	DM Fan stopped (VLP38++ only)	JD
44	Disconnected LVDSI cable between DM and LCD module	VR-CN1
47	DM temperature too high
48	LCD Panel short detected (IC7A01 pin 124 = Low when short)	PB-PG
58	Signal Short Detected (IC7A01 pin 89 = Low when short)
59	DM short detected ( (IC7A01 pin 125 = Low when short)

POWER SUPPLY CIRCUIT 

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