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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Tuesday, 7 January 2020

REPAIR / SERVICING TV SAMSUNG UE37D5000PW

Technical description and composition of the SAMSUNG UE37D5000PW TV, panel type and applicable modules. The composition of the modules.
SAMSUNG LED
Model: UE37D5000PW UE37D5000
Chassis / Version: U57A
Panel: LD370BGB-C1
LED driver (backlight): with integrated PSU
PWM LED driver: SLC3011M
MOSFET LED driver: FDT3N40
Power Supply (PSU): BN44-00422B PD46AD-BDY
PWM Power: FA5591N (PFC), ICE3BR1765JZ (Standby), ICE1HS01G (PWM resonant)
MOSFET Power: 5N50, K8A50D
MainBoard: BN41-01661B BN94-04979D
IC MainBoard: K4B1G1646G-BCH9, WT61P805, NTP-7411S
Tuner: BN40-00196A DT0S40FVH082A
Technical Specifications UE37D5000
SAMSUNG UE37D5000PW
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE37D5000PW 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.
In some of these cases, a fault is detected in the BN44-00422B power module. Then we recommend that you measure its output voltages and, if they are completely or partially absent, you should check the health of the power switches (5N50, K8A50D) and rectifier diodes for a possible short circuit.
First of all, you should check the Standby power converter (on standby), made on the PWM controller ICE3BR1765JZ, with a power switch in one DIP package.
In case of breakdowns in the secondary circuits, any converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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, elements supplying the PWM controller, frequency-setting, damper, as well as elements of the Negative Stabilization Feedback.
PWM ICs (PWM) FA5591N (PFC), ICE3BR1765JZ (Standby), ICE1HS01G (PWM resonant) are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
Failure in most such cases is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the break 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, you may need a voltage of several tens of volts. 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.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01661B 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 attempts to repair the MB board (SSB), it is necessary to check the health of its elements - K4B1G1646G-BCH9, WT61P805, NTP-7411S which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before replacing the tuner BN40-00196A DT0S40FVH082A, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention! For users and owners of UE37D5000PW TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.

SCHEMATICS --------------> Samsung UE37D5000PW 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


 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 UE37D5000PW device:
Installed matrix (LED panel) LD370BGB-C1.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC3011M PWM controller. As power elements of the LED driver, keys of the FDT3N40 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE37D5000PW TV are generated by the BN44-00422B power supply module or its analogs using the FA5591N (PFC), ICE3BR1765JZ (Standby), ICE1HS01G (PWM resonant) microcircuits and power switches of the 5N50, K8A50D type.
MainBoard - the main board (motherboard) is a BN41-01661B module, using K4B1G1646G-BCH9, WT61P805, NTP-7411S and others.
The tuner BN40-00196A DT0S40FVH082A provides the reception of television programs and tuning to channels.
Posted By: FRANK at 08:33
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