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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Wednesday, 19 February 2020

REPAIR / SERVICING TV LG 32LK330

Technical description and composition of the LG 32LK330 TV, panel type and applicable modules. The composition of the modules.
LG
Model: 32LK330
Chassis / Version: LA01M
Panel: LC320WXN (SC) (A2)
Inverter (backlight): LC320WXN 6632L-0637A
PWM Inverter: OZ9966SN
MOSFET Inverter: AOD4184
Power Supply (PSU): EAX63985401 / 6 LGP32-11P
PWM Power: L6599AD (PWM Resonant), 3BR4765JZ (Standby)
MOSFET Power: MDF6N60
MainBoard: EAX64272802 (0) EBR74234613
IC MainBoard: CPU: LGE2111-T8, Nand: H27U1G8F2BTR, Sound: Ntp-7400L
Tuner: EBL61060001 TDSS-G101D
Specifications 32LK330
LG 32LK330
General recommendations for repairing TV LCD
Repair of all electronic devices, including the LG TV, made on the basis of the chassis, it is advisable to start with an external examination of its external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. If ring cracks are detected in the soldering of the terminals of the elements or dangling connecting tracks, swollen capacitors or charred resistors - all this can be characteristic signs of the causes or consequences of an already known typical malfunction.
If the EAX63985401 / 6 power supply module fails, the external manifestations may be different, for example, the LG 32LK330 does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
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 chip from the manufacturer.
If the LG 32LK330 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU. 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.
The motherboard EAX64272802 (0) EBR74234613 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary. When repairing an MB board, you need to check its CPU components: LGE2111-T8, Nand: H27U1G8F2BTR, Sound: Ntp-7400L. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Attention to users! Self-repair of the LG 32LK330 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC MANUAL ------------------------------->  LG 32LK330, 32LK330-UH Chassis LA01M



 The appearance of the MainBoard EAX64307906 is shown in the figure below:
EAX64307906
EAX64307906 can be used in TVs:
LG 32LM640T ZA (Panel LC320EUA PE F2), LG 32LS570T (Panel LC320EUN (SE)(M2)), LG 47LM620S (Panel LC470EUE (SE)(F4)), LG 42LM670T (Panel LC420EUG(PE)(F2)), LG 42LM640T 42LM640S (Panel LC420EUG (PE)(F1)), LG 42LM620T (Panel LC420EUE (SE)(F1)), LG 47LM660T (Panel LC470EUG (PE)(F1)), LG 42LS570T (Panel T420HVN01.0), LG 42LS570S ZB (Panel LC420EUE (SE)(M1)), LG 42LM669T (Panel LC420EUG (PE)(F2)), LG 42LM669S (Panel LC420EUG (PE)(F1)), LG 37LM620T (Panel LC370EUN (SE)(F2)), LG 47LM669 (Panel LC470EUG (PE)(F2)), LG 32LS570S ZB (Panel LC320EUN (SE)(M2)), LG 47LM620T (Panel LC470EUE (SE)(F3)), LG 47LM761T ZA (Panel LC470EUH (PE)(F1), LG 32LM620S (Panel LC320EUN (SE)(F2) ), LG 47LM670T 47LM670T-ZA.BRUWLJU (Panel LC470EUG (PE)(F1)), LG 42LM660S 42LM660S-ZA.BRUWLJU (Panel LC420EUG (PE)(F1)), LG 42LM660T 42LM660T-ZA.BRUWLJU (Panel LC420EUG (PE)(F1) ), LG 32LM620T (Panel LC320EUN (SE)(F3)), LG 55LM620T 55LM620T-ZE (Panel LC550EUE (SE)(F1)).
The appearance of the power supply
Main features of the device LG 32LK330:
Installed matrix (LCD panel) LC320WXN (SC) (A2).
An inverter is used to power the backlight, controlled by the OZ9966SN PWM controller. As power elements of the inverter, keys of the AOD4184 type are used.
The necessary supply voltages for all nodes of the LG 32LK330 TV are generated by the EAX63985401 power module or its analogs using L6599AD (PWM Resonant), 3BR4765JZ (Standby) microcircuits and MDF6N60 type power switches.
MainBoard - the main board (motherboard) is an EAX64272802 module, using CPU chips: LGE2111-T8, Nand: H27U1G8F2BTR, Sound: Ntp-7400L and others.
The tuner EBL61060001 TDSS-G101D provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG 32LK330-ZM Chassis LA01M
Panel Type (Matrix): T315XW03 V.F,
Motherboard: EAX64272802 (0), Tuner: EBL61060001 TDSS-G101D
T-con: 31T10-TOO T315XW04 V1
Invertor: VIT71884.00 REV2, OZ9643N
PSU: LGP32-11P
Remote control: AKB72915207
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXN-SCA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V

Posted By: FRANK at 07:16
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