JVC LT-32EX19 - OPERATING TIME CHECK - RESET - HOW TO ENTER SERVICE MODE - DISPLAY FAULTS - MEMORY IC REPLACEMENT
This model has a function to count and record the LCD panel operating
time. The operating time can be checked in the following procedure.
Maximum count time = 131072 hours
- Press the [DISPLAY] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
- When the Main Menu is displayed, press [2] key to enter the self-check mode.
- The operating time of the LCD panel is displayed in 6 digit decimal number.
# When disconnecting the power cord from the AC outlet turns
off the power, the recorded time count less than 2 hours is not counted.
# When the operating time exceeds the maximum count time,
"MAX" is displayed to the right of the counted time, and the
following count is discontinued.
{CLICK ON PICTURES TO ZOOM IN}
- Press the [DISPLAY] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
- When the Main Menu is displayed, press [2] key to enter the self-check mode.
- When the self check screen is displayed, press [ZOOM] key to reset the operating time.
DISPLAY FAULTS
PIXEL FAULT
There are three pixel faults - bright fault, dark fault and
flicker fault - that are respectively defined as follows.
BRIGHT FAULT
In this pixel fault, a cell that should not light originally
is lighting on and off. For checking
this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting
on and off.
DARK FAULT
In this pixel fault, a cell that should light originally is
not lighting or lighting with the brightness twice as brighter as originally
lighting. For checking this pixel
fault, input 100% of each R/G/B color and find out the cell that is not
lighting.
FLICKER FAULT
In the pixel fault, a cell that should light originally or
not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of
each RGB color and find out the cell that is flashing on and off.
MEMORY IC REPLACEMENT
- This model uses the memory IC.
- This memory IC stores data for proper operation of the video and drive circuits.
- When replacing, be sure to use an IC containing this (initial value) data.
- POWER OFF: Switch off the power and disconnect the power plug from the AC outlet.
- REPLACE THE MEMORY IC: Be sure to use the memory IC written with the initial setting values.
- POWER ON: Connect the power plug to the AC outlet and switch on the power.
- Press the [DISPLAY] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
- Press the [8] key, then enter the SYSTEM CONSTANT SET SCREEN.
- Check the setting values of the SYSTEM CONSTANT SET. If the
value is different, set the correct value with the [FUNCTION ◄/►] key.
Refer to the OPERATING INSTRUCTIONS and set the receive
channels (Channels Preset) as described.
USER SETTING
Check the user setting items according to the given in page later.
Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items
as described.
SERVICE MODE SETTING [ADJUST MODE SETTING]: Verify what to
set in the SERVICE MODE, and set whatever is necessary. Refer to the SERVICE
ADJUSTMENT for setting.
SERVICE MODE SCREEN
ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed,
press [1] key to enter the ADJUSTMENT MODE.
NOTE: * When a number key other than the [1] key is
pressed in the SERVICE MODE SCREEN, the other relevant screen may be displayed.
* This is not used in the adjustment procedure. Press the [MENU]
key to return to the SERVICE MODE SCREEN.
VSM PRESET MODE
This mode is used to adjust the VSM.
HOW TO ENTER THE VSM PRESET MODE
- When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [6] key to enter the VSM PRESET MODE.
INITIAL SETTING VALUES
- Perform fine-tuning based on the "initial values" using the remote control when in the Service mode.
- The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values.
- [S004] to [S009] are the off set values.
SELF CHECK FEATURE
HOW TO ENTER THE SELF-CHECK MODE- Press the [DISPLAY] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
- Press the [2] key then enter the SELF CHECK MODE.
When a number key other than the [2] key is pressed in the SERVICE
MODE screen, the other relevant screen may be displayed. This is not used in the SELF CHECK MODE.
Press the [MENU] key to return to the MAIN MENU SCREEN.
HOW TO EXIT THE SELF-CHECK MODE
- To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the Self-check display mode.
- To Clear (Reset) Failure History:
FAILURE HISTORY
- Failure history can be counted up to 9 times for each item. When the number exceeds 9, display will remain as 9. Failure history will be stored in the memory unless it has been deleted.
POINTS TO NOTE WHEN USING THE SELF CHECK FEATURE
- In addition to circuit failures (abnormal operation), the following cases may also be diagnosed as "Abnormal" and counted.
- Temporary defective transmissions across circuits due to pulse interruptions.
- Misalignment in the on/off timing of power for I2C bus (Vcc) when turning on/off the main power. Therefore, turn on the main power, and then wait for about 3 seconds before starting Self-check. If recurrences are expected, ensure to clear (reset) the failure history and record the new diagnosis results.
If error is detected, the power is turned off. Shortly after
the power is turned off, POWER LED will be blinked. When the protection of low bias line short operates, the power
cannot be turned on until the power cord takes out and inserts, after the power
is turned off.
