PANASONIC TH-L32C5X - TH-L42U5X - TH-L32C58K - TH-L42U58K - TH-L32C59K - TH-L42U59K - SERVICE MODE - FIRMWARE UPDATE - SERVICE MODE ADJUSTMENTS - LCD TELEVISION REPAIR AND SERVICE - TIPS MANUAL

PANASONIC TH-L32C5X - TH-L42U5X - TH-L32C58K - TH-L42U58K - TH-L32C59K - TH-L42U59K - Service mode - Firmware Update - Service mode adjustments - LCD Television Repair and service - Tips manual

Category: LCD Television Repair and Service 

Contents of this article 

• How to access service mode 
• Software update 
• Service mode adjustments 

PANASONIC TH-L32C5X - TH-L42U5X - TH-L32C58K - TH-L42U58K - TH-L32C59K - TH-L42U59K

SERVICE MODE

How to enter to service mode

At any input source then press the “Mute” (Remote control) and External Manual key to enter factory mode

Adjustment instruction
At any input source then press the “Mute” (Remote control) and External Manual key to enter factory mode
During Factory menu, if “Mute” (Remote control) key is pushed, system will exit factory mode.
Source Calibration
Set the signal generator to input sources Component on LCD-TV; ASTRO-859 signal setting to NTSC-M (PG2 mode Timing 924 and Pattern 984 SMPTE Color Bar.)

Entering into factory Mode: Press up or down key of remote control to select “Auto Calibration”, Press  > key to enter the item.

Source calibration performed automatically when finished that will show OK.
Repeat step 2 to do VGA input sources,
ASTRO-859 signal setting to1024X768 60Hz. (PG2 mode: Timing 963 and Pattern 942 16step H-grayscale + white border.)

Color Temperature Adjustment & Check
Set the signal generator to RGB, 1024*768, 60HZ(ASTRO-859: PG1 856), Level: 77(30%) or 178(70%). Full white pattern. (RGB gain and offset all should not over 128,and one of RGB gain and offset have to be setting on 110. )
Press up or down key of remote control to select “Cool”, Press OK key to enter the item. RGAIN, GGAIN, BGAIN, ROFFSET, GOFFSET, BOFFSET, drive values are set for Warm, Normal, and Cool independently.

Select Warm
Step 1.First Turning Gain parts of RGB.
(1) Warm spec.:
x= 0.318±0.005
y= 0.331±0.005
(2) If the x and y value are larger than specification,
Decrease R GAIN drive from default value.
Increase B GAIN drive from default value.
(3) If the x or y or both x and y value is/are smaller than specification.
Decrease B GAIN drive from default value
(4) According to a x and y value, please following adjustment of (4)-1 or (4)-2.
(4)-1 If x value is higher than spec
Decrease R GAIN drive from default value.
Increase B GAIN drive from default value.
(4)-2 If y value is higher than spec,
Decrease B GAIN drive from default value
Step 2.When finish Gain parts, then turning OFFSET parts
Select  Normal
(1) Medium spec.: (Same as the Gain session )
x= 0.289±0.005
y= 0.306±0.005
(2) If the x and y value are larger than specification,
Decrease R OFFSET drive from default value.
Increase B OFFSET drive from default value.
(3) If the x or y or both x and y value is/are smaller than specification.
Decrease B OFFSET drive from default value
(4) According to a x and y value, please following adjustment of (4)-1 or (4)-2.
(4)-1 If x value is higher than spec
Decrease R OFFSET drive from default value.
Increase B OFFSET drive from default value.
(4)-2 If y value is higher than spec,
Decrease B OFFSET drive from default value
Step 3.When finishing OFFSET parts, then recheck Gain parts .unitl Both of them meet the
target specification
Step 3. Than select  Cool  using same way to adjust the setting.
x= 0.273±0.005
y= 0.280±0.005

Exit Factory Mode:
After finish adjusting color temperature press [MENU] to exit factory mode.

Items of Factory menu
When in PC/ Component/ Video (Composite)/ ANT inputs then press the [MUTE] key by remote control and press [MENU] key by side key over 2 sec to enter factory mode.
During Factory menu, if [EXIT] key is pushed, system will exit factory mode.
Press up and down key can move high light item from Color Temperature -> Shipping -> NV Clear -> Full Power -> Auto Calibration -> RF Burn In -> Reset -> USB Upgrade -> Write EDID -> Gamma. Push [OK] or [ > ] key can select high light item function. (Press left and right can adjust value)
Display model name, firmware version and released date on top.

1) Factory Color Temp data edit
Press up or down key can select high light item function
Press enter key to enter the item.
-Color temp default preset No (Warm, Medium, Cool).
-R, G, B data for each preset
Press “Up” or “Down” key to select “R”, “G”, “B” item
Press “Left” or “Right” key to set the “R”, “G”, “B” value
Press “MENU” or “EXIT” item to exit to factory mode
2) Shipping mode
Select shipping country then “Reset” for into shipping mode.

3) NV CLEAR
Initialize program’s default values to NVRAM for following adjustment items accuracy.
In factory mode it is the first and important step to make sure all values are default value and correct
- Reset settings: Gamma table, Channel table (Favorite channel, Channel label etc.), Model table
(H/V Position, Clock, Phase), Source dependent setting (Contrast, Brightness etc.), Common setting
(Volume, Language etc.), Parental Control (Rating, Password etc), Closed Caption.
To avoid a mistake initial process after factory setting is done. This item will have a check dialog “yes or no” to do the initial or not.
4) Full power
This is for power consumption testing.
To measure the maximum power consumption of TV set, we adjust the value of following items to maximum.
- Video: Contrast maximum value, Brightness maximum value, Backlight maximum value.
- Audio: Volume maximum value, Bass default value, Treble default value.
Press enter key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.
5) Auto Calibration
Source Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC,
Composite and Component input source.
This item will have a result dialog “OK” or “NG”.
6) RF Burn In
Use “snow” pattern for burn in. Selected items are “On” and “Off”.
While turn on burn in mode, firmware will automatically turn off “Auto power off” function.
If there is no power supply suddenly, firmware will re-enter burn in mode automatically when power supply is back
Pressed the “Power” key, firmware will automatically turn off burn in mode.
Burn in mode: Source is “ANT/Cable" and channel is NTSC channel 3.
7) Reset
Reset all settings of OSD menu to default value.
- Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting
(Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating, Password etc), Closed Caption.
8) USB Upgrade
Upgrade firmware through USB.
9) Write EDID
Write EDID into VGA and HDMI EEPROM.
This item will have a check dialog “yes or no” to do the initial or not.
10) Gamma
For factory test value of gamma.

USB Software updated
(1) Plug the USB with the firmware file named .
(2) Into Factory mode & select USB upgrade , USB upgrade message would appear automatically.
(3) Select Yes, and then start the upgrading.
(4) Upgrading is starting, please wait for the progress finish.
(5) When the progress completed, press Remote power on.