JVC LT-26A80SU - LT-32A80ZU SERVICE MODE AND POWER SUPPLY CIRCUIT
JVC LT-26A80SU - LT-32A80ZU
SERVICE MODE AND POWER SUPPLY CIRCUIT
HOW TO ENTER THE SERVICE MODE
(1) Set to "0 minutes" using the [SLEEP] key.
(2) While "0 minutes" is displayed, press the [VIDEO STATUS] key and [DISPLAY] key simultaneously.
(3) Enter the SERVICE MODE
(2) While "0 minutes" is displayed, press the [VIDEO STATUS] key and [DISPLAY] key simultaneously.
(3) Enter the SERVICE MODE
HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the SERVICE MODE.
HOW TO STORE OF SETTING VALUE
When adjustment is completed, press the [MUTING] key to memorize the adjustment value.
NOTE:
If not to do it, adjustment data is not memorized to the memory IC. And if exit the adjustment mode before memorize the data, the adjustment value which you change is canceled.
Press the [MENU] key to exit the SERVICE MODE.
HOW TO STORE OF SETTING VALUE
When adjustment is completed, press the [MUTING] key to memorize the adjustment value.
NOTE:
If not to do it, adjustment data is not memorized to the memory IC. And if exit the adjustment mode before memorize the data, the adjustment value which you change is canceled.
SYSTEM SETTING
(1) Set to "0 minutes" using the [SLEEP] key.
(2) While "0 minutes" is displayed, press the [VIDEO] key and [DISPLAY] key simultaneously, then enter the SERVICE MODE.
(3) Press the [1] key in the SERVICE MODE SCREEN.
(4) Press the [2] key in the TV-MICRO SERVICE MODE
(5) The SELF CHECK MODE screen is displayed.
(6) Turn off the power by pressing the [POWER] key on the remote control unit.
(2) While "0 minutes" is displayed, press the [VIDEO] key and [DISPLAY] key simultaneously, then enter the SERVICE MODE.
(3) Press the [1] key in the SERVICE MODE SCREEN.
(4) Press the [2] key in the TV-MICRO SERVICE MODE
(5) The SELF CHECK MODE screen is displayed.
(6) Turn off the power by pressing the [POWER] key on the remote control unit.
Built in ATSC (Advanced Television Systems Committee)
TUNER
This TV can receive both Digital broadcasting (ATSC) and
Analog broadcasting.
D.I.S.T. (Digital Image Scaling Technology)
This system uses line interpolation to double the number of scanning lines and achieve high resolution, flicker-free picture.
Color Management
This function ensures dull colors are compensated to produce natural hues.
Picture Management
This function makes it easier to see the dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas.
Smart Picture
This function detects the APL (Average Picture Level) and adjusts the contrast suitable for what you are watching.
DIGITAL VNR
This function cuts down the amount of noise in the original picture.
MPEG Noise Reduction
This function effects the block noise removal and mosquito NR simultaneously.
Sensor Effect
With Sensor Effect ON, a "leaf" icon will appear on your TV screen when Smart Sensor brightness adjustment occurs.
TUNER
This TV can receive both Digital broadcasting (ATSC) and
Analog broadcasting.
D.I.S.T. (Digital Image Scaling Technology)
This system uses line interpolation to double the number of scanning lines and achieve high resolution, flicker-free picture.
Color Management
This function ensures dull colors are compensated to produce natural hues.
Picture Management
This function makes it easier to see the dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas.
Smart Picture
This function detects the APL (Average Picture Level) and adjusts the contrast suitable for what you are watching.
DIGITAL VNR
This function cuts down the amount of noise in the original picture.
MPEG Noise Reduction
This function effects the block noise removal and mosquito NR simultaneously.
Sensor Effect
With Sensor Effect ON, a "leaf" icon will appear on your TV screen when Smart Sensor brightness adjustment occurs.
MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug.
2. Replace the memory IC
Be sure to use a memory IC written with the initial setting data.
3. Power on
Connect the power cord to the wall outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the receive channels (Channels Preset) as described.
5. User settings
Check the user setting items according to the "FACTORY SETTING ITEM" table.
Where these do not agree, refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary.
1. Power off
Switch off the power and disconnect the power plug.
2. Replace the memory IC
Be sure to use a memory IC written with the initial setting data.
3. Power on
Connect the power cord to the wall outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the receive channels (Channels Preset) as described.
5. User settings
Check the user setting items according to the "FACTORY SETTING ITEM" table.
Where these do not agree, refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary.
WHITE BALANCE
(HIGHLIGHT)
(1) Receive a NTSC
75% all white signal.
(2) Set "VIDEO STATUS" to "STANDARD".
(3) Set "ASPECT" to "FULL".
(4) Select "COLOR TEMPERATURE" to "LOW".
(5) Select the 1.TV-Micro Service from the SERVICE MODE.
(6) Select the 1.Adjust.
(7) Adjust to keep one of <S002> (Red drive), <S003> (Green drive) or <S004> (Blue drive) unchanged, then lower the other two so that the all-white screen is equally white throughout.
NOTE:
Set one or more of <S002>, <S003> and <S004> to "137".
(8) Check that white balance is properly tracked from low light to high light. If the white balance tracking is deviated, adjust to correct it.
(2) Set "VIDEO STATUS" to "STANDARD".
(3) Set "ASPECT" to "FULL".
(4) Select "COLOR TEMPERATURE" to "LOW".
(5) Select the 1.TV-Micro Service from the SERVICE MODE.
(6) Select the 1.Adjust.
(7) Adjust to keep one of <S002> (Red drive), <S003> (Green drive) or <S004> (Blue drive) unchanged, then lower the other two so that the all-white screen is equally white throughout.
NOTE:
Set one or more of <S002>, <S003> and <S004> to "137".
(8) Check that white balance is properly tracked from low light to high light. If the white balance tracking is deviated, adjust to correct it.
(9) Press the [MUTING] key to memorize the set value.
TUNER DIAGNOSTIC SCREEN
This model has a function to check the connection status of the digital tuner. The connection status can be checked following the below procedure.
(1) Receive digital broadcasting.
(2) Press the [MENU] key to display the user menu.
(3) Select "TUNER SETUP" from the user menu, and then press the [OK] key.
(4) Select Tuner Diagnostic (Service Use Only) from "TUNER SETUP", and then press the [OK] key.
This model has a function to check the connection status of the digital tuner. The connection status can be checked following the below procedure.
(1) Receive digital broadcasting.
(2) Press the [MENU] key to display the user menu.
(3) Select "TUNER SETUP" from the user menu, and then press the [OK] key.
(4) Select Tuner Diagnostic (Service Use Only) from "TUNER SETUP", and then press the [OK] key.
Frequency
This is the in-band frequency tuned up now. If channel map is not available, this value will be set to 0 or it may become the frequency tuned up last time.
Modulation
This is the in-band modulation mode now. “NTSC / 64QAM / 256QAM / 8VSB”
Input level
This is the input signal power level of in-band. This value varies between 0 and 100.
SR
This is the Signal noise Ratio.
RSE
This is uncorrectable error packet count. (Read-Solomon Error Correction Processing) When this value is not 0, it may have influence on the quality of video or audio. However, note that this value does not display an exact value depending on timing. If a signal is weak, this error will be occurred, but even if a signal is too strong, it occurs.
FO
This is the out-of-band frequency tuned up now. This value varies between 70000kHz and 130000kHz. If OOB is received normally, frequency will be locked to a certain value (this changes with an area or cable operators). When frequency is continuing changing, OOB is not normally received.
Ch#
This is the channel number now.
Station
This is the channel station name now.
This is the in-band frequency tuned up now. If channel map is not available, this value will be set to 0 or it may become the frequency tuned up last time.
Modulation
This is the in-band modulation mode now. “NTSC / 64QAM / 256QAM / 8VSB”
Input level
This is the input signal power level of in-band. This value varies between 0 and 100.
SR
This is the Signal noise Ratio.
RSE
This is uncorrectable error packet count. (Read-Solomon Error Correction Processing) When this value is not 0, it may have influence on the quality of video or audio. However, note that this value does not display an exact value depending on timing. If a signal is weak, this error will be occurred, but even if a signal is too strong, it occurs.
FO
This is the out-of-band frequency tuned up now. This value varies between 70000kHz and 130000kHz. If OOB is received normally, frequency will be locked to a certain value (this changes with an area or cable operators). When frequency is continuing changing, OOB is not normally received.
Ch#
This is the channel number now.
Station
This is the channel station name now.
POWER SUPPLY CIRCUIT
