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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Monday 11 March 2019

LG 42LB7DF SERVICE MODE AND SCHEMATIC DIAGRAM

LG 42LB7DF SERVICE MODE AND SCHEMATIC DIAGRAM


SERVICE MODE 


ADJUSTMENT MODE
1)Press the POWER ON KEY on R/C for adjustment.
2) Press ADJ button of Service remocon.
Enter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) Press ADJ button of Service remocon. Select “10.Test pattern” and, after select “White” using navigation button, and then you can see 100% Full White pattern.
3) In this status you can maintain Heat-Run useless any pattern generator.
Note
If you maintain one picture over 20minute(Especially sharp distinction black with white pattern-13Ch, or Cross hatch pattern- 09Ch) then it can appear image stick near black level.
Adjustment items
PCB Assembly adjustment
#  
CPLD DOWNLOAD
#  Adjust 480i Comp1
#  Adjust 1080p Comp1 / RGB
- If it necessary, it can adjustment at Manufacture Line.
- You can see set adjustment status at “9.ADJUST CHECK” of the “In-start menu”.
Set Assembly Adjustment
#
EDID(The Extended Display Identification Data)
/ DDC(Display Data Channel) download
# Color Temperature(White Balance) Adjustment
# Make sure RS-232C control
# Selection Factory output option
(3) Circuit Board Header Connection
- The ByteBlasterMV 10-pin female plug connects to a 10- pin male header on the circuit board. The 10-pin male header has two rows of five pins, which are connected to the device’s programming or configuration pins.
- The ByteBlasterMV cable receives power and downloads data via the male header.
(4) Real-Time ISP with the Quartus II Software.
1) The programming file formats generated by the Quartus II software that support these two features are the Programmer Object File(.pof) that is used with the Quartus II programmer, and the Jam File(.jam) and Jam Byte-Code File(.jbc) that are used with either the Quartus II programmer or other programming tools.
2) Ensure that you enable this feature before programming a MAX II device through the Quartus II programmer. You can enable the real-time ISP feature by selecting the Enable real-time ISP to allow background programming(for MAX II devices) option from the Quartus II programmer window.
3) You can also enable the real-time ISP feature in the Quartus II software through the following steps:
1. Choose Options(Tool menu).
2. Choose Programmer under the Category section
(5) MAX II Device Handbook, Volume1.
- To configure or program one or more devices with the ByteBlasterMV cable and the Quartus II programmer.
1) Compile a project. The Quartus II compiler generates a .sof file to configure APEX II, APEX 20K, Mercury, and Excalibur devices. To program an EPC configuration device, a .pof or JAM STAPL format file should be used.
2) Attach the ByteBlasterMV cable to a parallel port on a PC and insert the 10-pin female plug into the prototype system containing the target device. The board must supply power to the ByteBlasterMV cable.
- For the Windows Nt operating system, a driver must be installed before using the ByteBlasterMV cable, go to the “ByteBlasterMV and MasterBlaster Installation” section in the Quartus II.
3) Open the Quartus II programmer by selecting Open Programmer from the (Processing Menu). Choose Setup... in the Programming Hardware section. Specify the ByteBlasterMV cable and the appropriate LPT port. Please see “Changing Setup” under the ByteBlasterMV cable in the Quartus II software Help menu for more information.
4) Select either passive serial or JTAG programming mode and then add the files and/or devices you want to program or configure using the add file.. or add device... buttons to create a chain description file(.cdf).
- The programmer has two programming modes “ passive serial and JTAG, In passive mode, you select which SOFs to include in the device chain. In JTAG mode, you add specific devices and configuration devices to the device chain, in addition to POFs and SOFs, and you have several programming options for each configuration device in the chain. In JTAG mode, you can verify an EPC configuration device’s contents against its programming file data, check that a device is blank, examine a programmed device and save its data to file, or use its data to program or verify another configuration device.
5) Choose the start button in the Quartus II software to program or configure the device(s). The ByteBlasterMV cable downloads the data from the SOF and/or POF file(s) into the device(s).
Auto Adjust Component 480i/1080p RGB 1080p
Summary
- Adjustment component 480i/1080i and RGB 1080p is Gain and Black level setting at Analog to Digital converter, and compensate the RGB deviation
Using in strument
- Adjustment remocon, 801GF(802B, 802F, 802R) or MSPG925FA pattern generator.(It can output 480i/1080i horizontal 100% color bar pattern signal, and its output level must setting 0.7V±0.1V p-p correctly)
* You must make it sure its resolution and pattern cause every instrument can have different setting.
White Balance Adjusment
(1) If you can’t adjust with inner pattern, then you can adjust it using HDMI pattern. You can select option at “Ez-Adjust Menu - 7. White Balance” there items “NONE, INNER, HDMI”. It is normally setting at inner basically. If you can’t adjust using inner pattern you can select HDMI item, and you can adjust.
(2) In manual Adjust case, if you press ADJ button of service remocon, and enter “Ez-Adjust Menu - 7. White Balance”, then automatically inner pattern operates. (In case of “Inner” originally “Inner” will be selected.
1) Connect all cables and equipments )
2) Set Baud Rate of RS-232C to 115200. It may set 115200 orignally.
3) Connect RS-232C cable to set
4) Connect HDMI cable to set
5) Select LA75A Chassis at Adjustment equipment, and adjust.
- When Color temperature (White balance) Adjustment. (Automatically)
1) Press “Power only key” of service remocon and operatie automatically adjustment.
2) Set BaudRate to 115200.
- You must start “wb 00 00” and finish it “wb 00 ff”.
- If it needs, then adjustment “Offset”.
White Balance Adjusment
(Manual adjustment)
(1) Test Equipment: CA-210
1) Using LCD color temperature, Color Analyzer (CA-210) must use CH 9, which Matrix compensated (White, Red, Green, Blue compensation) with CS-2100. See the Coordination bellowed one.
(2) Manual adjustment sequence is like bellowed one.
1) Turn to “Ez-Adjust” mode with press ADJ button of service remocon.
2) Select “10.Test Pattern” with CH+/- button and press enter. Then set will go on Heat-run mode. Over 30 minutes set let on Heat-run mode.
3) Let CA-210 to zero calibration and must has gap more 10cm from center of LCD module when adjustment.
4) Press “ADJ” button of service remocon and select
“7.White-Balance” in “Ez-Adjust” then press “ RIGHT ARROW” button of navigation key. (When press “ RIGHT ARROW” button then set will go to full white mode)
5) Adjust at three mode (Cool, Medium, Warm)
6) If “Medium” and “Warm” mode.
- Let R-Gain to 192 and R, G, B-Cut to 64 and then control G, B gain adjustment High Light adjustment.
7) With volume button (+/-) you can adjust.
8) After all adjustment finished, with Enter ( STOP key) turn to Ez-Adjust mode. Then with ADJ button, exit from adjustment mode.
SCHEMATIC DIAGRAM 
CLICK ON THE IMAGE TO ZOOM IN