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 UE40C6000

Technical description and composition of the SAMSUNG UE40C6000 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40C6000 UE40C6000RW
Chassis / Version: N96A / SS11
Panel: LTF400HJ05 (BN07-00913A)
LED backlight: LJ64-02370A
T-CON: S120APM4C4LVD
LED driver (backlight): integrated into PSU
PWM LED driver: HV9963
MOSFET LED driver: SDT03N04
Power Supply (PSU): BN44-00357A
PWM Power: SEM3040 (PFC), ICE3BR1765J, UCC25600
MOSFET Power: SD10N60 (PFC), TK8A50
MainBoard: BN41-01444C BN94-04122P
IC MainBoard: CPU: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256
Tuner: BN40-00172A DT0S40CVH081A
Technical Specifications UE40C6000
SAMSUNG UE40C6000
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE40C6000 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Often in such cases, the BN44-00357A power module is faulty. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of the power switches (SD10N60 (PFC), TK8A50) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers SEM3040 (PFC), ICE3BR1765J, UCC25600, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the backlight elements of the LED panel. 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 LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01444C 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 with the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner BN40-00172A DT0S40CVH081A, if it is not possible to tune to television channels, 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
Attention to users! Self-repair of a SAMSUNG UE40C6000 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!


 Service manual ---------------->  SAMSUNG UE40C6000RW Chassis N96A (Model: UE**C600*R*, UE**C650*U*, UE**C6700US).

PSU SCHEMATIC ------------------> BN44-00357A.

FIRMWARE FOR Weltrend WT61P802-----------------> SAMSUNG LE32C630 Weltrend WT61P802.

FIRMWARE DUMP EEPROM 24C256 -----------> SAMSUNG UE40C6000RW N96A / SS11, Main: BN41-01444C BN94-04122P, Panel: LTF400HJ05


 The appearance of the MainBoard BN41-01444C is shown in the figure below:
BN41-01444C
BN41-01444C can be used in TVs:
SAMSUNG UE40C6510UW (Panel T400FBE2-DB), SAMSUNG UE32C6510UW (Panel LTF320HF02), SAMSUNG UE55C6000RW UE55C6000 (Panel LTF550HJ03), SAMSUNG UE40C6000 UE40C6000RW (Panel LTF400HJ05 (BN07-00913A)).
Main features of the SAMSUNG UE40C6000 device:
The matrix (LED panel) LTF400HJ05 (BN07-00913A) is installed.
The matrix control uses the Timing Controller (T-CON) S120APM4C4LVD.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the HV9963 PWM controller. As power elements of the LED driver, keys of the type SDT03N04 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40C6000 TV are generated by the BN44-00357A power supply module or its analogs using SEM3040 (PFC), ICE3BR1765J, UCC25600 microcircuits and power switches of the SD10N60 (PFC), TK8A50 type.
MainBoard - the main board (motherboard) is a BN41-01444C module, using CPU chips: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256 and others.
The tuner BN40-00172A DT0S40CVH081A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF400HJ05
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Glare (Haze 0%), Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 6000: 1
Display Colors: 1.07B (8-bit + Dithering), CIE1931 80%
Response Time: 6 (G to G)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 82 pins
Voltage: 12.0V
Posted By: FRANK at 06:59
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