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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Sunday, 22 December 2019

REPAIRING / SERVICING TV SAMSUNG LE32A451C1

Technical description and composition of the SAMSUNG LE32A451C1 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32A451C1
Chassis / Version: AA01, AA08
Panel: T315XW02 V.L
T-CON: 31T03-C01 T315XW02 VL CTRL BD
Inverter (backlight): 4H.V2668.001-G V266-001
PWM Inverter: OZ964SN
Power Supply (PSU): BN44-00209A
PWM Power: FAN7530 (PFC), FSQ0365RN (Standby), MC33067P
MOSFET Power: 11N60 (PFC), 8N50
MainBoard: BN41-00983A BN94-01673J
IC MainBoard: SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100
Tuner: BN40-00116A
Control: Remote: BN59-00685A, IR: BN41-00990A
Technical Specifications LE32A451C1
SAMSUNG LE32A451C1
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32A451C1 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.
With such manifestations, the BN44-00209A power module usually fails. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (11N60 (PFC), 8N50) and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
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. FAN7530 (PFC), FSQ0365RN (Standby), MC33067P PWM controllers, 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, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in powering the inverter, you should ring in its converter power keys for breakdown and the secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-00983A 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100 and replace the failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
Before replacing the tuner BN40-00116A, if there is no tuning to 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
Owners and users of the SAMSUNG LE32A451C1 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!

 The appearance of the MainBoard BN41-00983A is shown in the figure below:
BN41-00983A
BN41-00983A can be used in TVs:
SAMSUNG LE26A451C1 (Panel T260XW02 V.L), SAMSUNG LE37A450C2 (Panel CLAA370WA03), SAMSUNG LE26A450 LE26A450C2 (Panel LTF260AP01), SAMSUNG LE32A450C2 (Panel T315XW02 V.L32WL15A1451151L1W3151L1A1UN1.


The appearance of the power supply
Main features of the SAMSUNG LE32A451C1 device:
Installed matrix (LCD panel) T315XW02 V.L.
The matrix control uses the Timing Controller (T-CON) 31T03-C01.
To power the backlight, an inverter 4H.V2668.001-G is used, it is controlled by the PWM controller OZ964SN.
The necessary supply voltages for all nodes of the SAMSUNG LE32A451C1 TV are generated by the BN44-00209A power supply module or its analogs using FAN7530 (PFC), FSQ0365RN (Standby), MC33067P microcircuits and 11N60 (PFC), 8N50 type power switches.
MainBoard - the main board (motherboard) is a BN41-00983A module, using SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100 and others.
The tuner BN40-00116A provides the reception of television programs and tuning to channels.

Posted By: FRANK at 08:26
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