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 LE40B530P7

Technical description and composition of the SAMSUNG LE40B530P7 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE40B530P7 LE40B530P7W
Chassis / Version: N65A
Panel: LTF400HA08
T-CON: FHD60C4LV1.1
Inverter (backlight): H40F1-9HS Rev1.4, BN44-00264C
Trans Inverter: 332430028EF
Power Supply (PSU): BN44-00264C H40F1-9HS Rev1.4
PWM Power: FAN7530 (PFC), 3BR1065JF
MOSFET Power: 11N60PFC, FQPF9N50C
MainBoard: BN41-01165A BN94-0182A
IC MainBoard: CPU: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, NTP3200, DRV603
Tuner: BN40-00137A
Control: Remote: BN59-00940A, IR: BN41-00990A
Technical Specifications LE40B530
SAMSUNG LE40B530P7
General repair guidelines for TV LCD
Repair SAMSUNG LE40B530P7 must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal elements, including the case. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters deformed after boiling, cracked soldering at the terminals of the elements can often tell the cause of the defect and possible consequences.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, it does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the H40F1-9HS Rev1.4 BN44-0026YC power supply module is faulty and there is a backlight for mines off and it needs repair. Sometimes with similar manifestations, a problem can only occur in the absence of processor power, but this happens much less often. When diagnosing and repairing the H40F1-9HS Rev1.4 BN44-0026YC power supply unit, when the mines are off, there is a backlight, you must first check the fuse, and if it breaks, you should check the power switch 11N60PFC and rectifier bridge diodes for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM 3BR1065 chip from the manufacturer.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it can sometimes become more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
The SAMSUNG LE40B530P7 TV has a BN44-0026YC power module, which is combined with an inverter - converter for powering the backlight. Such modules have been widely used in the latest models of LCD and LED TVs and, when repairing by replacing components, the combined circuitry does not interfere with the diagnosis and troubleshooting of the module.
If the SAMSUNG LE40B530P7 does not have an image, there is sound and the channels switch, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main power supply.
Repair of the inverter H40F1-9HS Rev1.4 BN44-0026YC, BN44-00264C is complicated by the fact that in case of any malfunction or emergency, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair or diagnostics of the LB 530 40 675B / D motherboard must be started by checking the power conditioners. If necessary, update the software (software).
Attention to the owners! Attempts at self-repair of the SAMSUNG LE40B530P7 TV are not recommended by the manufacturer and can lead to serious negative consequences!


SCHEMATICS ----->  Samsung LE40B530 Chassis N65A.
FOR MODELS:  LE32B53***, LE37B53***, LE40B53***, LE46B53***.

PSU SCHEMATICS ----->  BN44-00264C.

 The appearance of the MainBoard BN41-01165A is shown in the figure below:
BN41-01165A
BN41-01165A can be used in TVs:
SAMSUNG LE32B450C4 LE32B450C4W (Panel LTF320AP06), SAMSUNG LE37B530P7 LE37B530P7W (Panel AX094F040E), SAMSUNG LE40B530P7 LE40B530P7W (Panel LTF400HA08), SAMSUNG LE46B530P7 LE46B530P7W (Panel V460H1-L06 RevC1), SAMSUNG LE32B530 LE32B530P7W (Panel LTF320HA09), SAMSUNG LE40B531 LE40B531P7W (Panel LTF400HA08) .
PSU Advanced
The LE40B530P7 TV is equipped with a BN44-00264C power module using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN7530 PWM controller does not allow the electrolytic capacitor of the input rectifier filter to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the SAMSUNG LE40B530P7 device:
Installed matrix (LCD panel) LTF400HA08.
The matrix control uses the Timing Controller (T-CON) FHD60C4LV1.1.
To power the backlight used inverter H40F1-9HS. A transformer 332430028EF is installed in the inverter converter.
The necessary supply voltages for all nodes of the SAMSUNG LE40B530P7 TV are generated by the BN44-00264C power module or its analogs using FAN7530 (PFC), 3BR1065JF microchips and power switches of the 11N60PFC, FQPF9N50C type.
MainBoard - the main board (motherboard) is a BN41-01165A module, using CPU chips: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, NTP3200, DRV603 and others.
The tuner BN40-00137A provides the reception of television programs and tuning to channels.

Posted By: FRANK at 08:56
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