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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Tuesday 18 February 2020

REPAIR / SERVICING TV LG 32LH3010

Technical description and composition of the LG 32LH3010 TV, panel type and applicable modules. The composition of the modules.
LG
Model: 32LH3010
Chassis / Version: LD91A
Panel: LC320WUN (SA) (B2)
Lamp backlight: EEFL
T-CON: 6870c-0266A
Inverter (backlight): 6632L-0518B (KUBNKM154B) Rev 1.1 ALPS
PWM Inverter: BD9897FS
Power Supply (PSU): EAX55176301 - LGP32-09P
PWM Power: ICE3B0365J (Standby), L6599D (PWM Resonant), L6562A (PFC)
MOSFET Power: TK13A60D (PFC), TK6A60D
MainBoard: EAX60686902 (0) EBR61248505
IC MainBoard: CPU: LGE3368A-LF-SF; RAM: HY5PS1G1631C; SPI FLASH: Winb25X32VSIG; AUDIO: NTP-3100L
Tuner: TDFW-G235D
Control: IR: 32LH30 Ver1.2, 0XDA35V2.0L
Specifications 32LH3010
LG 32LH3010
General recommendations for repairing TV LCD
Repair of electronic devices, including the LG 32LH3010 TV, it is advisable to start with an external examination of its external and internal elements. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the CE3B0365J PWM regulator chip (Standby), L6599D (PWM Resonant), L6562A, which can only be checked by replacing with a new or obviously working one.
If the LG 32LH3010 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair of the motherboard EAX60686902 (0) EBR61248505 should begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: LGE3368A-LF-SF; RAM: HY5PS1G1631C; SPI FLASH: Winb25X32VSIG; AUDIO: NTP-3100L and other possible defective components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDFW-G235D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
It is necessary to remember to users that attempts to self-repair a TV LG 32LH3010 without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual and schematic diagram LG 32LH3010 Chassis LD91A.

MODEL : 32LH3000, 32LH3010, 32LH3020, 32LH3040, 32LH3000-ZA, 32LH3010-ZB, 32LH3020-ZD, 32LH3040-ZG


 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 32LH3010:
Installed matrix (LCD panel) LC320WUN (SA) (B2).
The matrix control uses the Timing Controller (T-CON) 6870c-0266A.
To power the backlight, an inverter 6632L-0518B is used, it is controlled by the BD9897FS PWM controller.
The necessary supply voltages for all nodes of the LG 32LH3010 TV are generated by the EAX55176301 power supply module or its analogs using ICE3B0365J (Standby), L6599D (PWM Resonant), L6562A (PFC) microcircuits, and TK13A60D (PFC), TK6A60D type power switches.
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: LC320WUN-SAB2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1300: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 6.0 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 08:01
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