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