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 LE32A450C2


Technical description and composition of the SAMSUNG LE32A450C2 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32A450C2
Chassis / Version: Ver: AA01
Panel: T315XW02 V.L
T-CON: 31T03-C01 T315XW02 VL CTRL BD
Inverter (backlight): 4H.V2668.001-G
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: IR: BN41-00990A
Specifications LE32A450C2
SAMSUNG LE32A450C2
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32A450C2 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.
Often in such cases, the switching power supply - the BN44-00209A module turns out to be faulty. We recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (11N60 (PFC), 8N50) and rectifier diodes of the converters for possible short circuit. First of all, you should check the operability of the standby power converter, made on the FSQ0365RN PWM controller (Standby).
It must be remembered that during breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the main fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, powering the PWM chip, frequency-setting, damper, and also elements of the Negative Stabilization Feedback.
Chips PWM controllers (PWM) FAN7530 (PFC), FSQ0365RN (Standby), MC33067P are checked by replacing with new, 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.
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 inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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, does not respond to the remote control. The indicator blinks or signals standby mode.
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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If a tuner BN40-00116A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Owners and users of the SAMSUNG LE32A450C2 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 LE32A450C2 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 LE32A450C2 TV are generated by the BN44-00209A power 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 08:23
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