Thursday, October 08, 2015

PANASONIC TC-L39B6 - TC-L39B6X - TC-L39B6P SERVICE MODE POWER SUPPLY CIRCUIT AND LED DRIVER CIRCUIT

PANASONIC TC-L39B6 - TC-L39B6X - TC-L39B6

LED TV


SERVICE MODE POWER SUPPLY CIRCUIT AND LED DRIVER CIRCUIT 

Alignment instructions
(1) Test equipment
VG-859 (YPbPr, VGA, HDMI signal generator)
FLUKE 54200(TV signal generator)
CA310 (white balancer)
(2) Power test
Connect main board, power board and IR board according the wiring diagram, connect the power and press power key (Remote controller or Keypad) button to turn on the TV.
a) Test the pin voltage of P802/power board , the data is shown
P802
Pin1,2
Pin3,4
Pin5,6,7
Pin8,9
Pin10,11
Voltage
GND
11.4V~12.6V
GND
11.4V~12.6V
4.75V~5.25V

Pin12
Pin13
Pin 14
Pin15
Pin16
On:2.5V~5.25V
Off: 0~0.5V
Normal: 2.0~5V
Abnormal :0~0.5V
On:2.5V~5.25V
Off: 0~0.5V
Duty 5%~100%
NC

SERVICE MODE 
At any input source then press the “LEFT ARROW ”, “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(0.2667).
Second, Decrease R to meet x spec(0.2662).
(2) Adjust 50IRE
First, Decrease G to meet y spec(0.2654).
Second, Decrease R to meet x spec(0.2658).
Note: Do not adjust the B GAIN on both 100IRE and 50IRE.
When match the spec, pressing “Save” then exit the adjustment page.
(3) 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 -> OK” 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.
Firmware update process
(1) Plug the USB with the firmware file named upgrade_2013_NA_60.pkg
(2) If system detect upgrade_2013_NA_60.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.
Points for attention in servicing of LED
1 Screens are different from one model to another and therefore not interchangeable. Be sure to Use the screen of the original model for replacement.
2 The operation voltage of LED screen is high voltage. Be sure to take proper measures in protecting yourself and the machine when testing the system in the course of normal operation or right after the power is switched off. Please do not touch the circuit or the metal part of the module That is in operation mode. Relevant operation is possible only one minute after the power is switched off.
3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or damage to the set.
4 Never operate the set or do any installation work in bad environment such as wet bathroom, laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc. Otherwise bad effect will result.
5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into the module, be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit.
6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at once. Likewise, if the screen is not working after the power is on or in the course of operation, the power must be cut off immediately and no more operation is allowed under the same condition.
7 Do not pull out or plug in the connection wire when the module is in operation or just after the power is off because in this case relatively high voltage still remains in the capacitor of the driving circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.
8 When operating or installing LED please don’t subject the LED components to bending, twisting or extrusion, collision lest mishap should result.
9 As most of the circuitry in LED TV set is composed of CMOS integrated circuits, it’s necessary to pay attention to anti statics. Before servicing LED TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded.
10 There are lots of connection wires between parts behind the LED screen. When servicing or moving the set please take care not to touch or scratch them. Once they are damaged the screen would be unable to work and no way to get it repaired. If the connection wires, connections or components fixed by the thermo tropic glue need to disengage when service, please soak the thermo tropic glue into the alcohol and then pull them out in case of damage.
11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.
12 For the storage make sure to put it in a place where the environment can be controlled so as to prevent the temperature and humidity from exceeding the limits as specified in the manual. For prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in one place. The ambient conditions are tabulated as follows:
Temperature
Scope for operation
0 ~ + 35 oC

Scope for storage
-20 ~ + 60oC
Humidity
Scope for operation
20% ~ 80 %

Scope for storage
10% ~ 90%

13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen, as commonly called “ghost shadow”. The extent of the residual picture varies with the maker of LED screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain in the picture for a period of time (several minutes). But when operating it please avoid displaying still picture in high brightness for a long time.
Points for attention during installation
1 The front panel of LED screen is of glass. When installing it please make sure to put it in place.
2 For service or installation it’s necessary to use specified screw lest it should damage the screen.
3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between the screen and the glass will affect the receiving and viewing effect
4 When dismantling or mounting the protective partition plate that is used for anti vibration and insulation please take care to keep it in intactness so as to avoid hidden trouble.
5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.
POWER SUPPLY CIRCUIT 

LED DRIVER CIRCUIT 

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