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, 30 December 2019

REPAIR / SERVICING TV SAMSUNG UE19ES4000W

Technical description and composition of the SAMSUNG UE19ES4000W TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE19ES4000W UE19ES4000
Chassis / Version: U71B
Panel: HT185WX-300
LED driver (backlight): with integrated PSU
PWM LED driver: MAP3204C
Power Supply (PSU): BN44-00505B - PD23A0QV_CPN 23A0Q
PWM Power: 3BR1065JF
MainBoard: BN41-01798A
IC MainBoard: CPU: SEMS23; DRAM: K4B1G1646G; NAND Flash: K9F1G08U0D; EEPROM: 24C256; SOUND: NTP-7412S
Tuner: BN40-00231A
Control: Remote: AA59-00602A
Appearance
SAMSUNG UE19ES4000W
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE19ES4000W TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module BN44-00505B. It is necessary to measure its output voltages and, if they are absent, to check the short circuit probability in the converters power switches and rectifier diodes.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) 3BR1065JF, if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In such cases, the most likely malfunction of the backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When trying to identify a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-01798A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Board repair and replacement of CPU chips: SEMS23; DRAM: K4B1G1646G; NAND Flash: K9F1G08U0D; EEPROM: 24C256; SOUND: NTP-7412S are manufactured with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If a tuner BN40-00231A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Once again, remind users! Attempts to self-repair a SAMSUNG UE19ES4000W TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!


Service manual ------------->  SAMSUNG UE19ES4000W Chassis U71B. SAMSUNG UE22ES5XXX, UE19ES4XXX CHASSIS U71B; UE32-37-40-46EH5XXX, EH4XXX CHASSIS U71A.

 The appearance of the MainBoard BN41-01798A is shown in the figure below:
BN41-01798A
BN41-01798A can be used in TVs:
SAMSUNG UE22ES5030W (Panel M215HW03 V.1), SAMSUNG UE22ES5000W (Panel M215HW03 V.1), SAMSUNG UE19ES4000W UE19ES4000 (Panel HT185WX-300).
The appearance of the power supply
Main features of the SAMSUNG UE19ES4000W device:
Installed matrix (LED panel) HT185WX-300.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MAP3204C PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE19ES4000W TV are generated by the BN44-00505B power module, or its analogs using 3BR1065JF microcircuits.
MainBoard - the main board (motherboard) is a BN41-01798A module, using CPU chips: SEMS23; DRAM: K4B1G1646G; NAND Flash: K9F1G08U0D; EEPROM: 24C256; SOUND: NTP-7412S and others.
The tuner BN40-00231A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:32
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