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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Monday 13 April 2020

REPAIR / SERVICING TV ERISSON 30LH02

Technical description and composition of the ERISSON 30LH02 TV, type of panel and applicable modules. The composition of the modules.
ERISSON
Model: 30LH02
Chassis / Version: MTK8201G
Panel: V296W1-L01
MainBoard: NUSTC_MTK8201G_V03_MP
IC MainBoard: CPU: MTK8293AE 0711-AEBL, SPI Flash: ES29LV800EB; EEPROM: 24C16; A2V64S40CTP; TPA3008D2
Tuner: ET-8F2D-QF106L
Specifications 30LH02
ERISSON 30LH02
General recommendations for repairing TV LCD
Repair and diagnostics of any electronic device, in particular ERISSON 30LH02, it is advisable to start with a careful external examination of internal and external elements. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
Malfunctions of the power module can be expressed in different ways, for example, ERISSON 30LH02 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the ERISSON 30LH02 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. When diagnosing a malfunction of the inverter with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
The motherboard NUSTC_MTK8201G_V03_MP is subject to verification if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary. Board repair and chip replacement SPI Flash: ES29LV800EB; EEPROM: 24C16; are made in the presence of the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Attention! For users and owners of 30LH02 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH  ----------->   ERISSON 30LH02 , Main: NUSTC_MTK8201G_V03_MP, Panel: V296W1-L01

 The appearance of MainBoard NUSTC_MTK8201G_V03_MP is shown in the figure below:
NUSTC_MTK8201G_V03_MP
NUSTC_MTK8201G_V03_MP can be used on TVs:
ERISSON 32LH02 (Panel V260B1-L03), ERISSON 30LH02 (Panel V296W1-L01), ERISSON 26LH02 (Panel V260B1 L03).
Main features of the ERISSON 30LH02 device:
Installed matrix (LCD panel) V296W1-L01.
The required supply voltage for all nodes of the TV ERISSON 30LH02 provides a switching power supply.
MainBoard - the main board (motherboard) is a NUSTC_MTK8201G_V03_MP module, using CPU chips: MTK8293AE 0711-AEBL, SPI Flash: ES29LV800EB; EEPROM: 24C16; A2V64S40CTP; TPA3008D2 and others.
The ET-8F2D-QF106L tuner provides TV reception and channel tuning.
Information from an alternative source:
ERISSON 30LH02
Panel Type (Matrix): V296W1-L15 Rev: C6
Motherboard: NUSTC_MTK8201G_V03_MP, ES29LXBDOEB-70TG, A2V64S40CTP, MT8293AE 0736-AEBL, WM8776S, Tuner: ET-8F2D-QF106L
T-con: V296W1-C1, CM2651B-KQ, EM636165TS-7G x3
Invertor: IV120320C, OZ9721GN x8, 5F97, 5E17, BA10339F, 8958A
PSU: MLT666 REV: 28L, MC0628R
Additional technical information about the panel:
Brand: CMO
Model: V296W1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 29.5 inch
Resolution: 1280x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 643.2x385.92 mm
Surface: Antiglare (Haze 40%), Hard coating (2H), Reflection 2.0% (Max.)
Brightness: 550 cd / m²
Contrast Ratio: 600: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 15/10 (Tr / Td); 16.6 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 07:13
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