Monday, April 20, 2015

PANASONIC TC-L32B6 -TC-L32B6P SERVICE MODE AND FRAME WARE UPDATE

PANASONIC TC-L32B6 -TC-L32B6P 

SERVICE MODE AND FRAME WARE UPDATE 

SERVICE MODE
At any input source then press the ”, “EXIT” and “OK” (using RC within 1 sec) to enter factory mode During Factory menu, if “EXIT” key is pushed, system will exit factory mode.
Auto Gamma Adjustment & Check
Set into factory mode then choose Auto Gamma Adjust, Press "2" "3" "2" "4" in turn within 1sec to enter the item, and push Init will self-generate gray pattern for adjusting.
(1) Adjust 100IRE
First, Decrease G to meet y spec(0.2655).
Second, Decrease R to meet x spec(0.2677).
(2) Adjust 50IRE
First, Decrease G to meet y spec(0.2671).
Second, Decrease R to meet x spec(0.2684).
Note: Do not adjust the B GAIN on both 100IRE and 50IRE. When match the spec, pressing “Save” then exit the adjustment page.
 When match the spec, pressing right key in "Save" position then exit the adjustment page.
Exit Factory Mode:
After finish Gamma adjust press [EXIT] to exit factory mode.
Items of Factory menu
When in any source, press the “Left -> Exit -> Enter” key of remote control can enter into factory mode. During Factory menu, only “EXIT” key is pushed, system will exit factory mode. Press up and down key can move high light item from Model Change -> Color Temp. Adjust -> Auto Gamma Adjust -> Timer Clear -> Preset Channel -> Full Power -> ADC Calibration -> Shipping reset -> Bypass Gamma -> UART Enable -> I2C -> Boot Loader Upgrade -> V-Com Adjust -> SG Pattern. Push “Enter” key can enter high light item function. (Press left and right can adjust value) Display Model version, Release Date, firmware version and released date on the bottom.
1)Model ID
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for FW engineer.
2)Color Temp. Adjust
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for PQ engineer.
3)Auto Gamma Adjust
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for PQ engineer.
4)Timer Clear
Reset the timer which records hours of LED panel burn in
This item will have a check dialog “yes or no” to do or not.
- Time in factory mode: Time function shall be displayed automatically. Saving the total time of system power on (LED turn on), and count the time automatically. The timer is continuous and saved (per 10 minutes) forever, unless it will be reset by doing “Timer Clear”.
5)Preset channel
Load preset channel for production line.
6)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.
7)ADC Calibration
ADC Calibration function is reserved for calibration by hand (PQ engineer only).
8)Shipping 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.
9)Bypass Gamma
For factory test value of gamma.
10)UART Enable
Enable to communicate with Auto-Alignment system.
11)I2C
Enable to communicate with Eeprom burn-in tool.
12)Boot Loader Upgrade
For firmware downgrade used.
13)V-Com Adjust
It's reserved for BMS function.
14)SG Pattern
Aging is for factory burn in and PTN ID provides each pattern for tester using.
Performance check
TV function
Connect RF to the center signal source, enter Channel menu
auto tuning, check if there are channels be skipped, check if the picture and speaker are normal.
AV terminals
Input Video signal, check if the picture and sound are normal.
YPbPr terminal
Input YUV signal (VG859 signal generator), separately input the YUV signals listed in table4 and check if the display and sound are normal at any situation (power on, channel switch and format convert, etc.)
HDMI terminal
Input HDMI signal (VG859 signal generator), separately input the signals listed in table6 and check the display and sound (32 KHz, 44.1 KHz, 48 KHz) at any situation (power on, channel switch and format convert, etc.)
other functions check
a) Check the sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.

Firmware update process
(1) Plug the USB with the firmware file named upgrade_2013_NA.pkg
(2) If system detect upgrade_2013_NA.pkg, USB upgrade message would appear automatically.
(3) Press Up key to select Yes, and then press OK key to start the upgrading.
(4) Upgrading is starting, please wait for the progress finish.
(5) When the progress completed, please follow the instruction to remove USB and restart Power off then on.
Working principle analysis of the unit
1. NTSC signals flow:
Antenna signal will be send to tuner TDST-H021F, then Tuner will be demodulating and output standard video signal TV-CVBS, and sound SIF signal. TV-CVBS will send to the master control IC MT5385 to video decode, de-interlace and scaler, then output LVDS level drive for panel display. The sound IF (SIF) will be fed into MT5385, after demodulating, pre-amplifying, bass adjusting and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707.
2. Composite/Component signal flow
Composite signal and Component signal will be fed to MT5385 to perform video decode, deinterlace and scaler, then output LVDS drive level for panel display. Audio signal from Composite/Component terminal via matched resistance is fed to MT5385 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707.
3. HDMI signal flow
Two HDMI video signals are directly fed to the master control IC MT5385 to digital decode, image scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in MT5385 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707.
4. USB signal flow
USB signal via USB connector sent to MT5385 and its A/D conversion to YPbPr output for MT5385, then output R/G/B of 24 bit to back end module to Video decode, de-interlace and image scale, then send to LVDS level drive for panel display. Sound signal of USB signal via matched resistance a nd sent to MT5385 to bass adjust and volume control, the sound signal will be transform into digital I2S signal and sent to digital amplifier TAS5707.
5. SPDIF signal flow
The master control IC MT5385 will transfer digital sound signal out by format Dobly Digital or PCM