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 UE40D5800

Technical description and composition of the SAMSUNG UE40D5800 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE40D5800 UE40D5800VW
Panel: LTJ400HM04-L
T-CON: BN41-01678A
LED driver (backlight): integrated into PSU
PWM LED driver: SLC4011M * 2
MOSFET LED driver: MDHT3N40URH * 8
Power Supply (PSU): BN44-00428B
PWM Power: FA5591N (PFC), ICS801S (Standby), FSFR1800XSL (PWM resonant)
MOSFET Power: MDF10N60G (PFC)
MainBoard: BN41-01661B
IC MainBoard: K4B1G1646G-BCH9, WT61P805, NTP-7411S
Tuner: BN40-00196A
Technical Specifications UE40D5800
SAMSUNG UE40D5800
General repair guidelines for TV LCD LED
If the UE40D5800 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. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) MDF10N60G (PFC) is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip FA5591N (PFC), ICS801S (Standby), FSFR1800XSL (PWM 8pin resonant), which can only be checked by replacing it with a new or obviously working one.
If there is no image when you turn on the SAMSUNG UE40D5800, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LTJ400HM04-L panel, or in the LED node of the driver-converter of their power supply.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
Repair of the BN41-01661B motherboard must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - K4B1G1646G-BCH9, WT61P805, NTP-7411S with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00196A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to the owners! Attempts to self-repair the SAMSUNG UE40D5800 TV are not recommended by the manufacturer and can lead to serious negative consequences!

 BN44-00428B Power Supply schematic diagram



 The appearance of the MainBoard BN41-01661B is shown in the figure below:
BN41-01661B
BN41-01661B can be used in TVs:
SAMSUNG UE32D4000NW UE32D4000 (Panel LD320AGC-C1 (V315B5-P10)), SAMSUNG UE40D5000PN (Panel LD400BGC-C2), SAMSUNG UE40D5000PW (Panel LD400BGC-C2 DD01), SAMSUNG UE32D5800VW UE32D5800 (Panel LTJ320HN02-L), SAMSUNG UE40D5800 UE40D5800VW (Panel LTJ400HM04-L ), SAMSUNG UE37D5000PW UE37D5000 (Panel LD370BGB-C1), SAMSUNG UE46D5000PW UE46D5000 (Panel LTG460HN01-V).
The appearance of the power supply
Main features of the SAMSUNG UE40D5800 device:
Installed matrix (LED-panel) LTJ400HM04-L.
The matrix control uses the Timing Controller (T-CON) BN41-01678A.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC4011M * 2 PWM controller. As power elements of the LED driver, keys of the type MDHT3N40URH * 8 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40D5800 TV are generated by the BN44-00428B power supply module or its analogs using FA5591N (PFC), ICS801S (Standby), FSFR1800XSL (PWM resonant) microcircuits and MDF10N60G (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01661B module, using K4B1G1646G-BCH9, WT61P805, NTP-7411S and others.
The tuner BN40-00196A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 07:26
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