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 UE40EH5040

Technical description and composition of the SAMSUNG UE40EH5040 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40EH5040 UE40EH5040W
Chassis / Version: HS02
Panel: CY-DE400BGSV1L
LED backlight: 2012SVS40 3228
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: STI13NM60N, AOD9N40
MainBoard: BN41-01795A BN94-05842N
IC MainBoard: WT61P805, 25Q40, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S
Tuner: BN40-00231A
Technical Specifications UE40EH5040
SAMSUNG UE40EH5040
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE40EH5040 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the BN44-00496A power supply is usually faulty. It is necessary to measure its output voltages, and if they are absent (full or partial), the power switches (STI13NM60N, AOD9N40) of the converters and rectifier diodes should be checked for possible short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback (OOS) stabilization circuits. PWM controllers (PWM) SSC2S110, if they do not have visible damage to the case and open fault 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.
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 good LED-a
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
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, you should update or replace 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 WT61P805, 25Q40, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S. BGA chip malfunctions are usually easy to detect by warming up.
Before replacing the tuner BN40-00231A, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to self-repair a SAMSUNG UE40EH5040 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

Service manual  ---------------------> SAMSUNG UE40EH5040 Chassis HS02    FOR MODELS  UE32EH5000, UE32EH5007, UE32EH5020W, UE32EH5030, UE32EH5037, UE32EH5040, UE32EH5047, UE32EH5050, UE32EH5057, UE32EH5300, UE32EH5307, UE32EH5450, UE37EH5000W, UE37EH5007, UE37EH5037, UE37EH5047K, UE39EH5003, UE40EH5000, UE40EH5007, UE40EH5020W, UE40EH5030, UE40EH5037, UE40EH5040, UE40EH5047, UE40EH5050, UE40EH5057, UE40EH5300, UE40EH5307, UE40EH5450, UE46EH5000, UE46EH5007, UE46EH5030, UE46EH5037, UE46EH5040, UE46EH5047, UE46EH5050, UE46EH5057, UE46EH5300, UE46EH5307, UE46EH5450, UE26EH4000, UE26EH4030, UE26EH4500, UE26EH4510, UE32EH4000, UE32EH4003, UE32EH4030, UE32EH405, UE22ES5000, UE22ES5003, UE22ES5030, UE22ES5400, UE22ES5410, UE19ES4000, UE19ES4030 Chassis: U71A/U71B.

 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 UE40EH5040 device:
Installed matrix (LED panel) CY-DE400BGSV1L.
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 UE40EH5040 TV are generated by the BN44-00496A power module, or its analogs using SSC2S110 microcircuits and power switches of the STI13NM60N, AOD9N40 type.
MainBoard - the main board (motherboard) is a BN41-01795A module, using microchips WT61P805, 25Q40, K4B1G1646G-BCH9, s24cs0, s24cs5, LVC244A, DRV612, NTP-7412S and others.
The tuner BN40-00231A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:09
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