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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Sunday 23 February 2020

REPAIR / SERVICING TV LG 37LH2010

Technical description and composition of the LG 37LH2010 TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 37LH2010 37LH2010-ZB.BRUVLJU
Chassis / Version: LD91A / G
Panel: LC370WXE (SB) (A1)
T-CON: 6870C-0240C LC420WXN / LC370WXN
LED driver (backlight): integrated into PSU
PWM LED driver: BD9215F
Power Supply (PSU): EAX55357701 / 32 2300KPG093A-F PLHL-T838B LGP37-09LH
PWM Power: ICE2PCS06 (PFC), STR-W6252
MainBoard: EAX60686902 EBU60674894
IC MainBoard: CPU: LGE3368A-LF-SF, RAM: HY5PS1G1631C, SPI FLASH: Winb25X32VSIG, AUDIO: NTP-3100L
Tuner: TDFW-G235D
Specifications 37LH2010
LG 37LH2010

General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs of the LG 37LH2010, as well as other electronic devices, is recommended to begin with an external examination of the external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.

As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.

If the LG 37LH2010 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. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.

Attention! For users and owners of LG 37LH2010 TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device !!!

 schematic diagram ------------->  LG CHASSIS : LD91A; MODEL: 37LH2000 37LH2000-ZA, 37LH2010, 37LH2010-ZB


 The appearance of the MainBoard EAX60686902 is shown in the figure below:
EAX60686902
EAX60686902 can be used in TVs:
LG 37LH3000 (Panel T370HW02 V.G), LG 32LH2000 (Panel LK315T3LA57), LG 32LF2510 ZB (Panel LC320WUN (SA)(B3)), LG 42LF2510 (Panel LC420WUE (SB)(C1)), LG 47LH3000 (Panel LC470WUE), LG 32LH3010 (Panel LC320WUN (SA)(B2)), LG 37LH2010 37LH2010-ZB.BRUVLJU (Panel LC370WXE (SB)(A1)).
The appearance of the power supply
Main features of the device LG 37LH2010:
Installed matrix (LED-panel) LC370WXE (SB) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0240C.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BD9215F PWM controller.
The necessary supply voltages for all nodes of the LG 37LH2010 TV are generated by the EAX55357701 power module, or its analogs using ICE2PCS06 (PFC), STR-W6252 microcircuits.
MainBoard - the main board (motherboard) is an EAX60686902 module using CPU chips: LGE3368A-LF-SF, RAM: HY5PS1G1631C, SPI FLASH: Winb25X32VSIG, AUDIO: NTP-3100L and others.
The TDFW-G235D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC370WXE-SBA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs EEFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 08:09
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