Sharp LC32X20 – Sharp LC37X20 – How to enter service mode – firmware update – Hotel mode – SMPS circuit diagram
How to enter Adjustment mode (Service
Mode), How to update the firmware, How to adjust the Hotel mode, How to
adjust the Lamp error, Hotel mode adjustments, Power supply circuit
diagram and PWB - SHARP LC32X20E/S/RU - LC37X20E/S/RU
Lamp
error detection
1. Function
This LCD color TV set incorporates a lamp error detection feature that automatically turns off the power for safety under abnormal lamp or lamp circuit conditions. If by any chance anything is wrong with the lamp or lamp circuit or if the lamp error detection feature is activated for some reason, the following will result.
1) The power is interrupted in about 6 seconds after it is turned on. (The power LED on the front of the TV set turns red from green and keeps blinking in red: ON for 250 ms and OFF for 1 sec.).
2) If the above phenomenon 1) occurs 5 times consecutively, it becomes impossible to turn on the power. (The power LED remained red).
2. Measures
1) Checking with lamp error detection OFF
Enter the adjustment process mode, referring to 1. Entering and exiting the adjustment process mode. If there is a problem with the lamp or lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are in trouble.
After
the lamp and lamp circuit are found out of trouble, reset the lamp error count.
If a lamp error is detected five consecutive times, the power cannot be turned
on. Using the cursor (UP/DOWN) key, move to the cursor to [LAMP ERROR RESET],
Line 8 on adjustment process mode. With the cursor (LEFT/RIGHT) keys, select
the [LAMP ERROR RESET] value. Finally press the cursor (OK) keys to reset the
value to “0”.1. Function
This LCD color TV set incorporates a lamp error detection feature that automatically turns off the power for safety under abnormal lamp or lamp circuit conditions. If by any chance anything is wrong with the lamp or lamp circuit or if the lamp error detection feature is activated for some reason, the following will result.
1) The power is interrupted in about 6 seconds after it is turned on. (The power LED on the front of the TV set turns red from green and keeps blinking in red: ON for 250 ms and OFF for 1 sec.).
2) If the above phenomenon 1) occurs 5 times consecutively, it becomes impossible to turn on the power. (The power LED remained red).
2. Measures
1) Checking with lamp error detection OFF
Enter the adjustment process mode, referring to 1. Entering and exiting the adjustment process mode. If there is a problem with the lamp or lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are in trouble.
Entering
and exiting the adjustment process mode [Service Mode]
1. Press
the “POWER” key on the set of running TV set to force off the power.
2. While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power. The letter “K” appears on the screen.
3. Next, hold down the “VOL (-)” and “P (V)” keys on the set at once. Multiple lines of character string appearing on the screen indicate that the set is now in the adjustment Process mode. If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure. (Another procedure)
4. Press the “MENU” key on the main unit to display OSD.
5. Move the cursor to SERVICE (OSD) using the cursor keys on the remote control. Then press the “MENU” key on the remote control to enter the service mode (adjustment process mode).
6. To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
2. While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power. The letter “K” appears on the screen.
3. Next, hold down the “VOL (-)” and “P (V)” keys on the set at once. Multiple lines of character string appearing on the screen indicate that the set is now in the adjustment Process mode. If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure. (Another procedure)
4. Press the “MENU” key on the main unit to display OSD.
5. Move the cursor to SERVICE (OSD) using the cursor keys on the remote control. Then press the “MENU” key on the remote control to enter the service mode (adjustment process mode).
6. To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
[Use
due care in handling the information described here lest the users should know
how to enter the adjustment process mode. If the settings are tampered with in
this mode, unrecoverable system damage may result.]
Remote controller key operation and description of display in adjustment process mode.
Description of display
SMPS schematic and PWB
Public
Mode (Hotel Mode)
Starting the Public Mode
> There are two following ways to display the PUBLIC Mode setting screen.
1) On the process adjustment mode screen, set the “HOTEL MODE” Flag to ON. Turn off the power, and turn it on again, pressing the and keys of the main unit at the same time.
2) Enter the Pass Word, and start the unit.
a) Turn on the power, pressing the and keys of the main unit at the same time.
b) Display the Pass Word input screen.
Starting the Public Mode
> There are two following ways to display the PUBLIC Mode setting screen.
1) On the process adjustment mode screen, set the “HOTEL MODE” Flag to ON. Turn off the power, and turn it on again, pressing the and keys of the main unit at the same time.
2) Enter the Pass Word, and start the unit.
a) Turn on the power, pressing the and keys of the main unit at the same time.
b) Display the Pass Word input screen.
Operation
procedure
• The initial input position is the digit at the left end.
• For the numeric keys to of R/C, key input is accepted. Input of the other keys is prohibited.
• Change “-” to “*” by inputting the numeric key at the input position, and shift the input position rightward one digit.
• When three digits are completely input, the Pass Word is judged.
c) Check the Pass Word by inputting three digits.
• The initial input position is the digit at the left end.
• For the numeric keys to of R/C, key input is accepted. Input of the other keys is prohibited.
• Change “-” to “*” by inputting the numeric key at the input position, and shift the input position rightward one digit.
• When three digits are completely input, the Pass Word is judged.
c) Check the Pass Word by inputting three digits.
If
the Pass Word is 0,2,7 it shifts to the PUBLIC Mode setting screen.
In another case, the screen is erased, and it operates in the ordinary mode.
In another case, the screen is erased, and it operates in the ordinary mode.
Exiting
the Public Mode screen
• There are two following ways to exit the Public Mode setting screen.
1) Turn off the power.
2) Select “Execution” in the PUBLIC_Mode to execute it.
Activate the restart under the set content. Here, the START input SOURCE setting is excluded since this item is referred to only when the power is turned on.
3. Set value of the Public Mode
• Each set value in the PUBLIC Mode is initialized when the factory setting is applied.
(The setting of the PUBLIC MODE Flag in the process adjustment mode screen is not changed.)
• There are two following ways to exit the Public Mode setting screen.
1) Turn off the power.
2) Select “Execution” in the PUBLIC_Mode to execute it.
Activate the restart under the set content. Here, the START input SOURCE setting is excluded since this item is referred to only when the power is turned on.
3. Set value of the Public Mode
• Each set value in the PUBLIC Mode is initialized when the factory setting is applied.
(The setting of the PUBLIC MODE Flag in the process adjustment mode screen is not changed.)
Upgrading
the software
1. Turn off the AC power (Unplug the AC power cord).
2. Insert the upgrading USB flash memory for upgrade into the service slot.
3. While holding down the power button, plug in the AC power cord of the main unit to turn on the power.
4. Upgrade begins automatically.
After the set starts, the upgrade screen will be displayed.
1. Turn off the AC power (Unplug the AC power cord).
2. Insert the upgrading USB flash memory for upgrade into the service slot.
3. While holding down the power button, plug in the AC power cord of the main unit to turn on the power.
4. Upgrade begins automatically.
After the set starts, the upgrade screen will be displayed.
5.
If any of the procedures fails, the following upgrade failure screen shows up.
For the failing procedure, the “NG” marking turns red.
NOTE: In such case, try to upgrade the software again. If it still fails, the hardware may be in trouble.
NOTE: In such case, try to upgrade the software again. If it still fails, the hardware may be in trouble.
6.
When all the procedures are complete, the following upgrade success screen
shows up. The new software version can be confirmed on screen.
The version number appears when each item has been successfully upgraded. Finally the main version number appears on screen.
The version number appears when each item has been successfully upgraded. Finally the main version number appears on screen.
8. Now the software has been upgraded.
NOTE: Then get the set started and call the process adjustment screen 1/33 to check the main software version.
CAUTION
1) Do not take out and put in the USB flash memory during formatting.
2) It takes about one minute to the rewriting completion.
Confirm the upgrade status on the screen becomes 100%
