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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Wednesday, 8 January 2020

REPAIR / SERVICING TV SAMSUNG UE40EH5047K

Technical description and composition of the SAMSUNG UE40EH5047K TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40EH5047K
Chassis / Version: U71A
Panel: LTJ400HM08-L
LED backlight: D1GE-400SCB-R3 (12.04.09) 40-3535 LED-60EA-L / R
T-CON: BN41-01797A
LED driver (backlight): integrated into PSU; 221V 289mA
PWM LED driver: SLC2012M
MOSFET LED driver: AOD4184
Power Supply (PSU): BN44-00496A - PD40AVF_CSM - PSLF760C04A
PWM Power: SSC2S110
MOSFET Power: AOD9N40, STI13NM60N
MainBoard: BN41-01795A BN94-05951H
IC MainBoard: WT61P805, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S
Tuner: BN40-00231A
Control: IR: BN96-22413B (BN41-01840B)
Appearance
SAMSUNG UE40EH5047K
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40EH5047K TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
In some of these cases, a fault is detected in the BN44-00496A power module. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (AOD9N40, STI13NM60N) and rectifier diodes of the converters for possible short circuit.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. The PWM controller SSC2S110, in the absence of external damage and a short circuit between the terminals, is checked by replacing a known-good one.
- 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.
As a rule, in such cases there is no display backlight. 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.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01795A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). 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 WT61P805, 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.
The malfunction of the tuner BN40-00231A is established after checking the software and all 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 users! Self-repair of a SAMSUNG UE40EH5047K TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!


SCHEMATIC MANUAL ----------------> Samsung UE40EH5047K shassis U71A,U71B.
UE32EH5****, UE22ES5****, UE37EH5**** UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****

VARIANT ------> SAMSUNG UE40EH5047K Ver. HS02; Panel: CY-DE400BGSV1L; T-con: CPWBX RUNTK DUNTK 5246TP ZZ;
Main: BN94-05951k (BN41-01795A);
PSU: PD40AVF_CSM (BN44-00496A), PSLF760C04A;
Led Backlight: LUMENS 40-3535LED-60EA-R D1GE-400SCB--R3(12,04,09), LUMENS 40-3535LED-60EA-L D1GE-400SCA--R3(12,04,09);
IR: BN96-22413B (BN41-01840B).


 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 UE40EH5047K device:
Installed matrix (LED-panel) LTJ400HM08-L.
The matrix control uses the Timing Controller (T-CON) BN41-01797A.
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 AOD4184 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40EH5047K TV are generated by the BN44-00496A power supply module or its analogs using SSC2S110 microcircuits and power switches of the AOD9N40, STI13NM60N type.
MainBoard - the main board (motherboard) is a BN41-01795A module, using WT61P805, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S and other chips.
The tuner BN40-00231A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:13
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