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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Friday, 27 December 2019

REPAIRING / SERVICING TV SAMSUNG LE37C630

Technical description and composition of the SAMSUNG LE37C630 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE37C630 LE37C630K1W
Chassis / Version: N84A
Panel: T370HW03 VH
Lamp backlight: 10 Lamp CCFL
T-CON: T315HW04 V3 CTRL BD
Inverter (backlight): 4H.V2988.071 / A1 V298-502HF 03J
PWM Inverter: OZ9937GN
MOSFET Inverter: N5100V
Power Supply (PSU): BN44-00339B
PWM Power: FAN7530 (PFC), FSFR1700US (PWM resonant), STR-A6052 (Stb)
MOSFET Power: SD10N60
MainBoard: BN41-01567A
IC MainBoard: CPU: SEMS18, SUB: WT61P802, NAND: KFG1G16U2D
Tuner: BN40-00197A DTS40FVL082A
Technical Specifications LE37C630
SAMSUNG LE37C630
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE37C630 does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In such cases, the fault should be sought first in the BN44-00339B power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (SD10N60) and rectifier diodes in the converters for a short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips FAN7530 (PFC), FSFR1700US (PWM resonant), STR-A6052 (Stb) are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01567A 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard - CPU: SEMS18, SUB: WT61P802, NAND: KFG1G16U2D. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before changing the tuner BN40-00197A DTS40FVL082A, 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
It should be remembered! Attempts to self-repair a SAMSUNG LE37C630 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

 Service manual ----> SAMSUNG LE32C63*, LE37C63*, LE40C63*, LE46C63*, LE32C65*, LE37C65*, LE40C65*, LE46C65*, LE55C65*, LE32C67*, LE37C67*, LE40C67*, LE46C67*, LE55C67* Chassis N84A.

PSU SCHEMATIC ---->  BN44-00339B Power supply.

FIRMWARE ----->  WT61P802 SAMSUNG LE32C630 Weltrend WT61P802


The appearance of the MainBoard BN41-01567A is shown in the figure below:
BN41-01567A
BN41-01567A can be used in TVs:
SAMSUNG LE32C630 LE32C630K1W (Panel LTF320HF01), SAMSUNG LE37C630 LE37C630K1W (Panel T370HW03 VH).
The appearance of the power supply
Main features of the SAMSUNG LE37C630 device:
Installed matrix (LCD panel) T370HW03 VH.
The matrix control uses the Timing Controller (T-CON) T315HW04.
To power the backlight, an inverter 4H.V2988.071 is used, it is controlled by the PWM controller OZ9937GN. As power elements of the inverter, keys of the N5100V type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE37C630 TV are generated by the BN44-00339B power module or its analogs using FAN7530 (PFC), FSFR1700US (PWM resonant), STR-A6052 (Stb) microcircuits and power switches of the SD10N60 type.
MainBoard - the main board (motherboard) is a BN41-01567A module, using CPU chips: SEMS18, SUB: WT61P802, NAND: KFG1G16U2D and others.
The tuner BN40-00197A DTS40FVL082A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T370HW03 VH
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 10 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 07:08
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