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 UE40D5003

Technical description and composition of the SAMSUNG UE40D5003 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40D5003 UE40D5003BW
Chassis / Version: U57A / Ver: CN01
Panel: LD400BGC-C2
LED backlight: 2011SVS40-FHD-5K6K- LEFT / RIGHT JVG4-400SMB-R1 (10.11.09)
T-CON: V460HJ1-C01
LED driver (backlight): integrated into PSU
PWM LED driver: SEM5025
MOSFET LED driver: MDD5N40RH
Power Supply (PSU): BN44-00473A - PSLF121A03S - PD46G0_BSM
PWM Power: SPC7011F, FSFR1700XSL, SQD2011K
MOSFET Power: MDF11N60TH
MainBoard: BN41-01702A BN94-04940F
IC MainBoard: K4B1G1646G-BCH9, AT24C256C, 25X40BVSIG, Flash NAND: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S
Tuner: BN40-00220A
Control: AA59-00496A, IR: BN96-16729P (BN41-01600A)
Technical Specifications UE40D5003
SAMSUNG UE40D5003
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE40D5003 TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
Often in such cases, the BN44-00473A power module is faulty. It is necessary to measure the secondary output voltage, and in case of their absence, check the operability of the power switches (MDF11N60TH) of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM microchip (PWM) SPC7011F, FSFR1700XSL, SQD2011K can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- 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 BN41-01702A 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). 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, AT24C256C, 25X40BVSIG, Flash NAND: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S and other possible faulty components . Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner BN40-00220A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention TV owners! Attempts to self-repair SAMSUNG UE40D5003 are not recommended by the manufacturer and can lead to serious negative consequences!


SCHEMATIC MANUAL ------------>  Samsung UE40D5003 Chassis U57A.
Chassis : U66A Model : UE32D55**R*, UE37D55**R*, UE40D55**R*, UE46D55**R*, UE32D57**RS, UE37D57**RS, UE40D57**RS, UE46D57**RS
Chassis : U57A Model : UE32D50**PW, UE37D50**PW, UE40D50**PW, UE46D50**PW, UE32D40**NW
Chassis : U57B Model : UE19D40**NW, UE22D50**NW, UE27D50**NW

PSU SCHEMATIC ------------> Power Supply BN44-00473A


 The appearance of the MainBoard BN41-01702A is shown in the figure below:
BN41-01702A
BN41-01702A can be used in TVs:
SAMSUNG LE40D503F7W LE40D503F7WXRU (Panel LTF400HM05), SAMSUNG UE32D4003BW UE32D4003 (Panel LTJ320AP02-L), SAMSUNG UE40D5003 UE40D5003BW (Panel LD400B2402403 Panel U4002G2EBDUE UD40E2BDUEE
The appearance of the power supply
Main features of the SAMSUNG UE40D5003 device:
Installed matrix (LED-panel) LD400BGC-C2.
The matrix control uses the Timing Controller (T-CON) V460HJ1-C01.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SEM5025 PWM controller. As power elements of the LED driver, keys of the MDD5N40RH type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40D5003 television are generated by the BN44-00473A power supply module or its analogs using microchips SPC7011F, FSFR1700XSL, SQD2011K and power switches of the MDF11N60TH type.
MainBoard - the main board (motherboard) is a module BN41-01702A, using microcircuits K4B1G1646G-BCH9, AT24C256C, 25X40BVSIG, Flash NAND: KFG1GN6W2D (BGA), LVC244A, DRV612, NTP-7411S and others.
The tuner BN40-00220A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:15
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