REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 30 January 2019

PANASONIC TC75EX750C – SERVICE MODE, ADJUSTMENTS, POWER LED BLINKING CODES, HOTEL MODE AND MORE

Panasonic TC75EX750C – Service mode, adjustments, Power LED blinking codes, hotel mode and more

TC75EX750C –  Panasonic LED LCD TV - Service mode, adjustments, Power LED blinking codes, hotel mode. Universal remote control set-up codes for Panasonic TVs and more - LA73 Chassis  Canada
The information given here is for experienced service technicians only and is not for use by the user. Does not contain warning or cautions to advce non-technical persons of potential dangers in attempting to service this product.  Products powered by electricity should be serviced or repaired by well experienced service personal only.  Any attempt to service or repair the product by anyone else could result in serious injury or even death.
Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.
Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.
After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
A-Board:  Main
P-Board: Power supply
K-Board: REMOTE / LED / CATS
LDP-Board: LED Driver
Replacement of ICs
When Main IC (IC8000) is replaced, eMMC (IC8920) should be also replaced with new one the same time.
When eMMC (IC8920) is replaced, Main IC (IC8000) is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
Keys HDCP1.4 (SINK) for MTK HDMI and HDCP2.2 (SINK) for MTK HDMI are not displayed in SELF CHECK.
Connect the 4K60Hz with HDCP2.2 compatible equipment to HDMI1/2 for verification of key [HDCP2.2 (SINK) for MTK HDMI].
Connect the 4K30Hz compatible equipment to HDMI1/2/3/4 for verification of key [HDCP1.4 (SINK) for MTK HDMI].
How to SELF CHECK 
While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
Digital TV programmes can be recorded in USB HDD.
A One-to-One key generated in A-board by SELF CHECK binds TV and USB-HDD for communication.
That key is only one key for them. If the key is difference, TV cannot access USB-HDD
Caution
New key will be generated by following SELF CHECK and previous TV programmes recorded in USB HDD will not be viewed.
SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
How to enter into CS Maintenance Menu
After exchange parts, check and adjust the contents of adjustment mode.
While pressing [VOLUME ( - )] button of the main unit, press [ RED ] button of the remote control three times within 2 seconds.
Note:
CS Maintenance Menu can not be entered when 3D signal input.
Input 2D signal to enter CS Maintenance Menu.
Key command
Press the Cursor key [Up/Down] on the remote control to select the functions.
How to exit:
Press the [EXIT] button on the remote control.
Repack
1. Select [OPT] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control.
Exit:
Press the [Exit] button or the [Return] button on the remote control.
EDID Clock
1. Select [EDID CLK] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control
Exit:
Press the [Exit] button or the [Return] button on the remote control.
USB HDD Drive Check
1. Select [DRV CHECK] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control.
Exit:
Press the [Return] button on the remote control.
White Balance Adjustment
After LCD PANEL or A-Board is replaced and repaired, perform [White balance adjustment] in case of necessity for test / check
([White balance adjustment] is not required basically).
1. Select [W/B ADJ] in CS Maintenance Menu.
2. Press [OK] button on the remote control.
Note for performing [White balance adjustment]
Make a note for the setting values before changing if the settings of [R-GAIN], [B-GAIN] and [G-GAIN] in [WB-ADJ] will be changed.
3. Press the cursor key [Up/Down] on the remote control to change the data value, and press [OK] button on the remote control to store the value for this model.
* COLOR TEMP : Press the [Option] button of the remote control to change the color temperature. (COOL/NORMAL/WARM/ TUNING)
Press the [Return] button on the remote control.
Version
1. Display the [Main Menu] with [MENU] on the remote control.
2. Select [Help] with Cursor Key [Up] or [Down] on the remote control and press [OK] to access.
3. Select [Version] with cursor Key [Up] or [Down] on the remote control and press [OK] to access.
The next window will appear.
Hotel mode
In order to display the Hotel mode setup menu, please enter the following command (within 2 seconds).
[TV]: Vol [Down] + [REMOTE]: AV (3 times)
To exit the Hotel mode setup menu
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
Data Copy by USB Memory
Board replacement (Copy the data when exchanging A-board):
(a) When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.
(b) Hotel (Copy the data when installing a number of units in hotel or any facility):
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.
Preparation
Make pwd file as startup file for (a) or (b) in a empty USB Memory.
1. Insert a empty USB Memory to your PC.
2. Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default (New Text Document.txt).
3. Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name for (a) or (b) and press ENTER.
File name:
(a) For Board replacement : boardreplace.pwd
(b) For Hotel : hotel.pwd
Note:
Make only one file to prevent the operation error.
No any other file should not be in USB Memory.
Data copy from TV set to USB Memory
1. Turn on the TV set.
2. Insert USB Memory with a startup file (pwd file) to USB terminal.
On-screen Display will be appeared according to the startup file automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2770
(b) For Hotel : 4850
Data will be copied from TV set to USB Memory.
It takes around 2 to 6 minutes maximum for copying.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in USB Memory for data from TV set.
(a) For Board replacement : user_setup
(b) For Hotel : hotel
Data copy from USB Memory to TV set
1. Turn on the TV set.
2. Insert USB Memory with Data to USB terminal.
On-screen Display will be appeared according to the Data folder automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2771
(b) For Hotel : 4851
Data will be copied from USB Memory to TV set.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement : Data will be deleted after copying (Limited one copy).
(b) For Hotel : Data will not be deleted and can be used for other TVs.
5. Turn off the TV set.
Note:
1. Depending on the failure of boards, function of Data copy for board replacement does not work.
2. This function can be effective among the same model numbers.
Self-check function
1. Checking the IIC bus lines
2. Power LED Blinking timing
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [BLUE] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting
Caution:
New key will be generated and previous TV programmes recorded in USB HDD will not be viewed. (See USB HDD Recording)
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on automatically.
Power LED Blinking timing chart
Information of LED Flashing timing chart.
When an abnormality has occurred the unit, the protection circuit operates and reset to the standby mode. At this time, the
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
LCD Panel test mode
Purpose:
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
How to Enter:
While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times within 2 seconds.
How to Exit:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
How to confirm:
If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.
And then, judge by the following method.
Still abnormal picture is displayed: The cause must be in LCD Panel.
Normal picture is displayed: The cause must be in A board.
Remarks:
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.
Universal remote control set-up codes for Panasonic brand TVs.
0016 0032 0033 0049 0054 0075 0099 0101 0104 0107 0110 0119 0143 0151 0152 0161 0166 0207 0249 0304 0305 0306 0396 0420 0461 0611 0631 0633 0692
If your set need a 3 digit code, just delete the leading Zero from each of the above said code, and then try it.
Posted By: FRANK at 15:30
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