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 UE32EH5057K

Technical description and composition of the SAMSUNG UE32EH5057K TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE32EH5057K
Chassis / Version: U71A / Ver. AH05
Panel: DE320BGA-B1
LED backlight: 2012SVS32 3328 FHD 10
T-CON: 32T26-C00, T320HVN02.0
LED driver (backlight): integrated into PSU; 140V 260mA
PWM LED driver: SLC1012C (FAN7340)
Power Supply (PSU): BN44-00493B (PD32AVF_CHS Rev1.3)
PWM Power: SSC2S110
MOSFET Power: MDF11N65B
MainBoard: BN41-01795A BN94-05951W
IC MainBoard: K4B1G1646G-BCH9, LVC244A, DRV612, NTP-7412S
Tuner: DT0D40FVL084AA
Control: IR BN96-22413D (BN41-01840B)
Appearance
SAMSUNG UE32EH5057K
General repair guidelines for TV LCD LED
If the UE32EH5057K does not turn on, does not respond to the remote control and the front panel buttons, does not blink lights and does not show any signs of operability, the power supply module BN44-00493B (PD32AVF_CHS Rev1.3) is probably faulty in this case. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power key (s) of the MDF11N65B converter. The complete inoperability of the power supply unit can be caused by a short circuit of the power elements in the primary circuit, followed by an open fuse, or a short circuit in the loads.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
In cases where the SAMSUNG UE32EH5057K TV has lost an image, and the sound is there and all other functions are functional, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the DE320BGA-B1 panel). When you turn on the TV, the image may appear briefly and disappear. It must be borne in mind that with such manifestations the LEDs themselves also fail.
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 check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
On the BN41-01795A BN94-05951W motherboard, in case of a malfunction, you should first check the operation of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements K4B1G1646G-BCH9, LVC244A, DRV612, NTP-7412S. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner DT0D40FVL084AA is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention to the owners! Attempts to repair the TV SAMSUNG UE32EH5057K on its own are not recommended by the manufacturer and can lead to serious negative consequences!

SCHEMATIC MANUAL -------------->  Samsung UE32EH5057K shassis U71A, U71B.
UE32EH5****, UE22ES5****, UE37EH5**** UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****

SAMSUNG UE32EH5057K; VER: TH02; PANEL: LTJ320HN07-L; T-CON: BN41-01797A; MAIN: BN41-01795A; PSU:BN44-00493B (PD32AVF_CHS).

PSU SSCHEMATIC  Samsung ----------->  BN44-00493B Power supply


 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 UE32EH5057K device:
The matrix (LED panel) DE320BGA-B1 is installed.
The matrix control uses the Timing Controller (T-CON) 32T26-C00.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the PLC controller SLC1012C (FAN7340).
The necessary supply voltages for all nodes of the SAMSUNG UE32EH5057K TV are generated by the BN44-00493B power module or its analogs using SSC2S110 microcircuits and power switches of the MDF11N65B type.
MainBoard - the main board (motherboard) is a module BN41-01795A, using microcircuits K4B1G1646G-BCH9, LVC244A, DRV612, NTP-7412S and others.
The tuner DT0D40FVL084AA provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:17
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