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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Friday 3 January 2020

REPAIR / SERVICING TV SAMSUNG UE32EH4000

Technical description and composition of the SAMSUNG UE32EH4000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE32EH4000 UE32EH4000W
Chassis / Version: U71A Ver: TS01
Panel: LTJ320AP03-L
LED backlight: D1GE-320SC0-R3 [12,04,12] 32Y-3535LED-32EA
T-CON: 32AP04S4LV0.2 (non-removable)
LED driver (backlight): integrated into PSU
PWM LED driver: SLC2012M
MOSFET LED driver: AOD4184, AOD5N40
Power Supply (PSU): BN44-00492A
PWM Power: SSC2S110
MOSFET Power: MDF10N60G
MainBoard: BN41-01795A BN94-05546F
IC MainBoard: WT61P805, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S
Tuner: DT0D40FVL084AA - BN40-00231A
Control: Remote: AA59-00602A, IR: BN41-01858C BN96-23694B
Technical Specifications UE32EH4000
SAMSUNG UE32EH4000
General repair guidelines for TV LCD LED
Repair of the SAMSUNG UE32EH4000 TV should begin with a careful external examination of all its components and modules. From the visible changes in the state of the components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element outputs, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases where the SAMSUNG UE32EH4000 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 BN44-00492A power supply module is most likely faulty or missing processor power on the motherboard (a typical defect in some SAMSUNG TVs). In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is cut off, then it is necessary to check the diodes of the rectifier bridge and the key transistor of the converter for a breakdown of the PN junctions, which can either be on a separate radiator or integrated with a PWM controller in a common chip.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The 2S110 PWM controller chip can also cause a breakdown of the power switch of the converter.
If, when you turn on the TV, the image appears and immediately disappears, or is missing initially when you turn on, but the sound has other functions that work, there is a high probability that the LED driver (LTJ320AP03-L panel backlight LED power converter) will be more likely to malfunction. In such cases, the common power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as the contact connections in the connectors and soldering.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
The motherboard BN41-01795A 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.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If you suspect a malfunction of the tuner DTOD40FVL084AA BN40-00231A, first of all, you need to make sure that the voltage of the varicaps (30-33V) is on the corresponding output of the tuner, as well as other voltage supplying it.
Remember! Attempts to self-repair by users of the SAMSUNG UE32EH4000 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!

SCHEMATIC MANUAL ------------->  Samsung UE32EH4000 Chassis U71A,U71B.
UE32EH5****, UE22ES5****, UE37EH5**** UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****

FIRMWARE FOR  Weltrend WT61P805 ------------> SAMSUNG UE32EH4000 UE32EH4000W U71A.

UE32EH4000W Ver: CS03, Panel: DE320AGH-C2
TYPE  32H-3535LED-32EA D1GE-320SC0-R3[12.04.12]
T-CON: ST3151A04-2


The appearance of the MainBoard BN41-01795A is shown in the figure below:
BN41-01795A
BN41-01795A can be used in TVs:
SAMSUNG UE32EH4000 UE32EH4000W (Panel LTJ320AP03-L), SAMSUNG UE32EH5000W (Panel DE320BGM-C1), SAMSUNG UE26EH4000W (Panel T260XVN01.1), SAMSUNG UE32EH5007K UE32EH5007 (Panel LTJ320HN07-L), SAMSUNG UE32EH5047K UE32EH5047 (Panel DE320BGA-B1), SAMSUNG UE40EH5007K (Panel CY-DE400BGSV1L), SAMSUNG UE32EH5057K (Panel DE320BGA-B1), SAMSUNG UE40FH5007K (Panel CY-DF400BGLV1V), SAMSUNG UE40EH5047K (Panel LTJ400HM08-L), SAMSUNG UE40EH5057K UE40EH5057 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5050W UE40EH5050 (Panel CY -DE400BGSV1L), SAMSUNG UE40EH5000 UE40EH5000W (Panel LTJ400HM801-V), SAMSUNG UE32EH5000K UE32EH5000 (Panel LTJ320HN07-L), SAMSUNG UE32EH5000W UE32EH5000 (Panel DE320BGM-C1), SAMSUNG LE32E420E2W LE32E420 (Panel LTF320AP13), SAMSUNG UE32EH4030 UE32EH4030W (Panel DE320AGH-C2 ), SAMSUNG UE46EH5057K UE46EH5057 (Panel LTJ460HN05-L), SAMSUNG UE40EH5040 UE40EH5040W (Panel CY-DE400BGSV1L).
The appearance of the power supply
Main features of the SAMSUNG UE32EH4000 device:
Installed matrix (LED-panel) LTJ320AP03-L.
The matrix control uses the Timing Controller (T-CON) 32AP04S4LV0.2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SLC2012M PWM controller. As power elements of the LED driver, keys of the type AOD4184, AOD5N40 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE32EH4000 TV are generated by the BN44-00492A power module or its analogs using SSC2S110 microcircuits and MDF10N60G type power switches.
MainBoard - the main board (motherboard) is a BN41-01795A module, using WT61P805, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S and other chips.
Tuner DT0D40FVL084AA - BN40-00231A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:31
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