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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Monday, 20 January 2020

REPAIR / SERVICING TV SAMSUNG UE48J5000AU


Technical description and composition of the SAMSUNG UE48J5000AU TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE48J5000AU
Panel: CY-JJ048BGEV5V
T-CON: HV480FHB-N40 Tcon Board 47-6021068
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00852B L48MSF_FDY
MainBoard: BN41-02098B BN94-09511Q
IC MainBoard: SPI Flash: 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI
Tuner: BN40-00288A DNTQ403IH286A
Control: IR: BN96-36076E BN41-02398A, Remote: AA59-00741A
Appearance
SAMSUNG UE48J5000AU
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE48J5000AU does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Sometimes, with such manifestations, a defect can be caused by faulty elements in the main power source - the BN44-00852B module. Then it is necessary to measure its output voltages and, if they are very low or completely absent, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in the short circuit mode, and during short circuit in the elements of the primary circuit, the main fuse usually breaks. If low-resistance resistors - current sensors are installed in the sources of the punched keys, they should be checked for compliance with the nominal value.
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 the excess of maximum current or voltage values. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
As a rule, in such cases there is no display backlight. The reason can be both in the power 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 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 a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- 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 BN41-02098B 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). Board repair and chip replacement SPI Flash: 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI are made with the necessary equipment and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before changing the tuner BN40-00288A DNTQ403IH286A, if it is not possible to tune to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Owners and users of the SAMSUNG UE48J5000AU TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!

SAMSUNG UE48J5000 Ver FD03 - Panel: CY-JJ048BGLV3V, Main: BN41-02098B BN94-09511Q, T-con: BN41-02111A, BN97-07971E, Led: V5DN-480SMA-R4 (15,11,19), V5DN-480SMB -R3, Power: L48MSF_FDY BN44-00852A.


 The appearance of the MainBoard BN41-02098B is shown in the figure below:
BN41-02098B
BN41-02098B can be used in TVs:
SAMSUNG UE32H4270AU UE32H4270 (Panel HH032AGH-R1), SAMSUNG LT24D310ES (Panel V236BJ1-LE2), SAMSUNG UE40H5000AK (Panel CY-GH040BGLV1V), SAMSUNG UE48H5270AU UE48H5270 (Panel CY-GH048BGLV1V), SAMSUNG UE32H4290AU UE32H4290 (Panel HH032AGH-R2), SAMSUNG UE40H5290AU UE40H5290 (Panel CY-GH040BGLV1V), SAMSUNG UE40J5000AU UE40J5000 (Panel CY-JJ040BGNV2V), SAMSUNG UE40H5020 UE40H5020AK (Panel CY-GH040BGSV1V), SAMSUNG UE40J5100AU (Panel CY-GH040BGSR1V), SAMSUNG T31D310EW (Panel CY-HH032AGSV1H), SAMSUNG UE48J5000AU (Panel CY-JJ048BGEV5V), SAMSUNG UE32H5020AK (Panel CY-GH032BGLV4V), SAMSUNG UE40J5120AU (Panel CY-GH040BGSV1V), SAMSUNG LT32E310EX T32E310EX (Panel CY-GJ032BGEV1V), SAMSUNG UE40H5270 UE40H5270AU (Panel CY-GH048BGLV1V), SAMSUNG UE32J5100AK UE32J5100 (Panel CY-GH032BGSV1V), SAMSUNG UE32H5000AK UE32H5000 (Panel CY-GH032BGLV1V), SAMSUNG UE48H5000 UE48H5000AK (Panel CY-GH048CSLV1V), SAMSUNG UE32J5120AK UE32J5120 (Panel CY-GH032BGSV1V).
The appearance of the power supply
Main features of the SAMSUNG UE48J5000AU device:
Installed matrix (LED panel) CY-JJ048BGEV5V.
The matrix control uses the Timing Controller (T-CON) HV480FHB-N40.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE48J5000AU TV is carried out by the power module BN44-00852B, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02098B module using SPI Flash chips: 25Q40CLSIP, RAM: K4B2G1646Q - BCKO, AUDIO: NTP7414, S24C256, AOZ3015PI and others.
The tuner BN40-00288A DNTQ403IH286A provides the reception of television programs and tuning to channels.

Posted By: FRANK at 07:31
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