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, 17 February 2020

REPAIR / SERVICING TV LG 32LF2510

Technical description and composition of the LG 32LF2510 TV, panel type and applicable modules. The composition of the modules.
LG
Model: 32LF2510 ZB
Chassis / Version: LD91A / G (PIP)
Panel: LC320WUN (SA) (B3) // LK315D3LA17
T-CON: 6870C-0266A
Inverter (backlight): 6632L-0601A
Power Supply (PSU): LGP32-09P EAX55176301 / 12EAY58582801
PWM Power: ICE3B0365J (Standby), L6599D (PWM Resonant), L6562A (PFC)
MOSFET Power: TK13A60D (PFC), TK6A60D
MainBoard: EAX60686902 (0) // EAX60686904 (2)
IC MainBoard: CPU: LGE3368A-LF-SF; RAM: HY5PS1G1631C; SPI FLASH: Winb25X32VSIG; AUDIO: NTP-3100L
Tuner: TDFW-G235D
Control: IR: EBR48885610 EAX44059405 (0)
Specifications 32LF2510
LG 32LF2510
General recommendations for repairing TV LCD
Repair of electronic devices, including the TV LG 32LF2510 ZB, it is advisable to start with an external examination of its external and internal elements. Often by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs familiar to experienced repairmen.
In the absence of any signs of operability, when the LG 32LF2510 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the power module LGP32-09P EAX55176301 / 12EAY58582801 TV. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power key (s) of the converter. The complete inoperability of the power supply unit can be caused by a short circuit in the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM ICE3B0365J; L6599D; L6562A from the manufacturer.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. It should be remembered that when protection is disabled in order to diagnose a malfunction, there is always a risk of failure of the power elements of the inverter. After repair, it is necessary to restore all standard converter protection circuits.
Repair or diagnostics of the motherboard EAX60686902 (0) // EAX60686904 (2) should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: LGE3368A-LF-SF; RAM: HY5PS1G1631C; SPI FLASH: Winb25X32VSIG; AUDIO: NTP-3100L requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally from external devices, but does not tune into television channels, the TDFW-G235D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. Sometimes the cause of the inoperability of the tuner may be a software failure.
Owners and users of the LG 32LF2510 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC ------------> LGP32-09P POWER SUPPLY

 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)).
PSU Advanced
The LGP32-09P power supply module is made using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the L6562A PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the mains voltage rectifier filter within a 50 Hz period. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device LG 32LF2510:
Installed matrix (LCD panel) LC320WUN (SA) (B3) or LK315D3LA17.
The matrix control uses the Timing Controller (T-CON) 6870C-0266A.
An inverter 6632L-0601A is used to power the backlight.
The necessary supply voltages for all nodes of the LG 32LF2510 TV are generated by the LGP32-09P 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-SAB3
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 (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 08:09
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