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, 6 January 2020

REPAIR / SERVICING TV SAMSUNG UE32F4500AK

Technical description and composition of the SAMSUNG UE32F4500AK TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE32F4500AK
Chassis / Version: U85A // Ver. RD05
Panel: HF32AGH-R1
LED backlight: LUMENS D2GE-320SC0-R3 (12,12,27)
T-CON: ST3151A04-5 v2.2
LED driver (backlight): integrated into PSU; 146V 240mA
PWM LED driver: BD8174MU
Power Supply (PSU): BN44-00604B
PWM Power: 2S110
MainBoard: BN41-01958B BN94-07062A // BN41-01958A BN94-07062A
IC MainBoard: K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745
Tuner: GT2CX-3S / K3S BN40-00262B
Control: AA59-00793A; IR: BN41-01976B (A26731B); WIFI Module: BN59-01161A WIDT-30Q
Technical Specifications UE32F4500
SAMSUNG UE32F4500AK
General repair guidelines for TV LCD LED
SAMSUNG UE32F4500AK TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Often by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, through ring cracks in the soldering of the outputs of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external signs of certain malfunctions.
If the UE32F4500AK TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink, there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the 2S110 PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuit.
If the SAMSUNG UE32F4500AK TV does not have an image, but there is sound, there may be a malfunction in the backlight circuits of the HF320AGH-R1 LED panel.
A malfunction in the backlight circuits often occurs due to a break in the power supply lines of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their outputs, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
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 one LED slightly if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode.
Repair or diagnostics of the BN41-01958 B motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update 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 CPU chips: SEMS30, SPI FLASH: W25Q40, SDRAM: K4B2G1646E and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the tuner BN40-00262B GT2CX-3S / K3S, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals.
Attention to the owners! Attempts to repair the TV SAMSUNG UE32F4500AK on its own are not recommended by the manufacturer and can lead to serious negative consequences!


SCHEMATIC --------------->  Samsung Chassis U85A, Models UE32F45****, UE**F53****, UE**F55****, UE**F5700AW



 The appearance of the MainBoard BN41-01958B is shown in the figure below:
BN41-01958B
BN41-01958B can be used in TVs:
SAMSUNG UE39F5500 UE39F5500AK (Panel HF390BGM-C1), SAMSUNG UE32F5300AK (Panel HF320BGA-B1), SAMSUNG UE40F6200AK (Panel CY-HF400BGLV2V), SAMSUNG UE32F4500AK (Panel HF32AGH-R1), SAMSUNG UE42F5300AK (Panel CY-HF420BGAV1V), SAMSUNG UE46F6500 AK (Panel CY-HF400CSLV1V), SAMSUNG UE46F6330AK UE46F6330 (Panel CY-HF460CSLV2V), SAMSUNG UE32F6330 AK (Panel CY-HF320CSLV1V), SAMSUNG UE40F6330AK UE40F6330 (Panel CY-HF400CSLV5V), SAMSUNG UE40F6510AB UE40F6510 (Panel CY-GF400CSLV2V), SAMSUNG UE55F6400AK UE55F6400 (Panel CY-HF550CSLV1V), SAMSUNG UE40F6540AB (Panel CY-GF400CSLV3V), SAMSUNG UE40F6500 UE40F6500SS (Panel CY-GF400CSLV1H), SAMSUNG UE46F6650 UE46F6650AB (Panel CY-GF460CSLV1V), SAMSUNG UE46F6510 UE46F6510AB (Panel CY-GF460CSLV2V), SAMSUNG UE50F6330 UE50F6330AK (Panel HF500CSA-B1).
The appearance of the power supply
Main features of the SAMSUNG UE32F4500AK device:
Installed matrix (LED-panel) HF32AGH-R1.
The matrix control uses the Timing Controller (T-CON) ST3151A04-5.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the BD8174MU PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG UE32F4500AK TV are generated by the BN44-00604B power module, or its analogs using 2S110 microcircuits.
MainBoard - the main board (motherboard) is a BN41-01958B module, using microcircuits K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 and others.
The tuner GT2CX-3S / K3S BN40-00262B provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:08
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