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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Thursday 23 April 2020

REPAIR / SERVICING TV SHIVAKI LCD-2610DVD

Technical description and composition of the TV SHIVAKI LCD-2610DVD, type of panel and applicable modules. The composition of the modules.
SHIVAKI
Model: LCD-2610DVD
Panel: 26 inch
Inverter (backlight): VIT71008.91
PWM Inverter: OZ964SN, LM358A, LM339A
MOSFET Inverter: AO4614
Trans Inverter: MLT-070A-T101, T51.0034.211
Power Supply (PSU): MLT-070A-T101
PWM Power: FAN7601, ML4800CS
MOSFET Power: AO4407P
MainBoard: PA-0157-1TG LM21C_UOC3
IC MainBoard: TDA12063H1 / N1F80, 24C16AN, K4S161622H-UC60, MST6151A-LF, 74HC4052D, 9938B, LM358
Tuner: TDQ-6F6 / T126D
Control: HOF-54B-TW54N, SHT2222-001
Appearance
SHIVAKI LCD-2610DVD
General recommendations for repairing TV LCD
Like any other TV, it is advisable to start the SHIVAKI LCD-2610DVD repair with an external examination of the visible changes in the external and internal elements. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
Malfunctions of the power module MLT-070A-T101 can be expressed in different ways, for example, the SHIVAKI LCD-2610DVD does not turn on at all and the control lights on its front panel do not light up and do not blink, there are no signs of operability. When diagnosing and repairing the MLT-070A-T101 power supply, it is first necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does 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 chips FAN7601, ML4800CS, LM358, 4407P from the manufacturer.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
Sometimes the SHIVAKI LCD-2610DVD TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the inverter itself, including the power supply unit (power supply unit).
In most cases, the diagnosis and repair of the VIT71008.91 inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
On the motherboard PA-0157 ---- 1TG LM21C_UOC3, in the event of a malfunction, you should first check the operation of all power supply stabilizers in the circuits and, if necessary, update the software (software). In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - TDA12063H1 / N1F80, 24C16AN, K4S161622H-UC60, MST6151A-LF, 74HC4052D, 9938B, LM358, Tuner - TDQ-6F6 / T126D.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Repair MainBoard
The appearance of MainBoard PA-0157-1TG is shown in the figure below:
PA-0157-1TG
PA-0157-1TG can be used in TVs:
SHIVAKI LCD-2610DVD (Panel 26 inches), SHIVAKI STV-26L2 (Panel SHFA060297641).
Main features of the SHIVAKI LCD-2610DVD device:
Installed matrix (LCD-panel) 26 inches.
To power the backlight, an inverter VIT71008.91 is used, it is controlled by the PWM controller OZ964SN, LM358A, LM339A. The transformer MLT-070A-T101, T51.0034.211 is installed in the inverter converter. As power elements of the inverter, keys of the type AO4614 are used.
The necessary supply voltages for all nodes of the SHIVAKI LCD-2610DVD TV are generated by the MLT-070A-T101 power supply module or its analogs using FAN7601, ML4800CS microchips and AO4407P type power switches.

MainBoard - main board (motherboard)  It is a PA-0157-1TG module using TDA12063H1 / N1F80, 24C16AN, K4S161622H-UC60, MST6151A-LF, 74HC4052D, 9938B, LM358 and other chips.
The TDQ-6F6 / T126D tuner provides TV reception and channel tuning.
Information from an alternative source:
Shivaki LCD-2610DVD PSU, FAN7601, ML4800CS, LM358, 4407P, Chopper - MLT-070A-T101 Main - PA-0157 ---- 1TG LM21C_UOC3, UOC - TDA12063H1 / N1F80, Memory - 24C16AN, Flash - K4S161622H AN17820B, SAW KF9650 & KF3953KM, MST6151A-LF, PT2328-X, 74HC4052D, 9938B, LM358, Tuner TDQ-6F6 / T126D INV 0034.211 TRANS
Remote control: (HOF-54B-TW54N) - the inscription on the board, IC remote - SHT2222-001
Posted By: FRANK at 05:22
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