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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 19 February 2020

REPAIR / SERVICING TV LG 32LK330-ZM

Technical description and composition of the LG 32LK330-ZM TV, panel type and applicable modules. The composition of the modules.
LG
Model: 32LK330-ZM
Chassis / Version: LA01M
Panel: T315XW03 V.F
T-CON: 31T10-TOO T315XW04 V1
Inverter (backlight): VIT71884.00 REV2
PWM Inverter: OZ9643N
Power Supply (PSU): EAX63985401 LGP32-11P
PWM Power: L6599AD (PWM Resonant), 3BR4765JZ (Standby)
MOSFET Power: MDF6N60
MainBoard: EAX64272802 (0)
IC MainBoard: CPU: LGE2111-T8, Nand: H27U1G8F2BTR, Sound: Ntp-7400L
Tuner: EBL61060001 TDSS-G101D
Control: AKB72915207
Specifications 32LK330
LG 32LK330-ZM
General recommendations for repairing TV LCD
It is recommended that you start troubleshooting diagnostics and repairing LGs with the LA01M chassis, as well as other electronic devices, with an external inspection of the external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
In cases where the LG 32LK330-ZM TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the LGP32-11P power supply module is most likely faulty or there is no processor power on the motherboard (a typical defect of some LG TVs). 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 is broken, 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.
The reasons for the breakdown of the power switch in pulsed power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or broken resistors in its bundle.
If the LG 32LK330-ZM 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. When disabling the inverter protection (to enable diagnostics), special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
If the EAX64272802 (0) motherboard is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Attention to the owners! Attempts at self-repair of the LG 32LK330-ZM TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC MANUAL --------------------------------->  LG 32LK330, 32LK330-UH Chassis LA01M


 The appearance of the MainBoard EAX40150702 is shown in the figure below:
EAX40150702
EAX40150702 can be used in TVs:
LG 32LG5000-ZA (Panel V315B1-C07), LG 42LG3000 (Panel LC420WXN (SA)(A1)), LG 32LG3000 (Panel LK315T3LZ94), LG 42LG5000 (Panel T420HW01 V.2).
The appearance of the power supply
Main features of the device LG 32LK330-ZM:
Installed matrix (LCD panel) T315XW03 V.F.
The matrix control uses the Timing Controller (T-CON) 31T10-TOO.
To power the backlight, the inverter VIT71884.00 is used, it is controlled by the PWM controller OZ9643N.
The necessary supply voltages for all nodes of the LG 32LK330-ZM 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: AUO
Model: T315XW03 VF CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 07:19
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