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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