Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 28 March 2019

SIO LC-60DS440U – SMPS SCHEMATIC – 60 INCH LED LCD TV

LC-60DS440U – SMPS SCHEMATIC – 60 inch LED LCD TV

60 inch LED LCD TV - LC60DS440U SMPS CIRCUIT DIAGRAM

EMI FILTER

CN101 AC power supply interface, F102 AC protection fuse on the circuit, the power supply board can be of between 90V to 264V

By alternating work, which CY101, CY102, CY103 is used to filter out high frequency noise part, and this part of the circuit can be prevented thunder Hammering, LX103, LX104, CX101, CX102 is used to filter out low frequency noise, RX101,, RX102, RX103 is used to discharge.

PFC, LLC and STANDBY

PFC

LLC

STANDBY

LED DRIVE

BD101 is a filter consisting of four diodes, used to convert AC to DC. CP110 & CP111 for filtering, FR102 is a fuse resistance, when the overload protection for the back of the circuit. UP101 is a critical mode PWM controller with excellent energy-saving performance, the UCC28051 can provide timely adjust DC

The output voltage to achieve power factor correction, in the short-term voltage instability, this IC can be adjusted by keeping output steady, LP101, QP101, UP101 is this boost & PFC circuit in which the main part and is boosted to 385V.

UM102 is a current mode PWM controller with excellent energy-saving performance, it uses a high voltage direct current source to provide two half-wave Rectifier diodes, further provides lossless starting current starting circuit. INN801 detect MOSFET current from CS pins Detection When the CS pin exceeds 0.7V, so UM102 enters over-current mode and does not automatically resume until the OCP is lower than 0.85V.

UM102 control 12V output, UM103, LM101 for the step-down circuit and the output 5V.

UL101 (SSC9512S) is a double-ended controller series-resonant half-bridge topology. In these converters, switch QL101 & QL102 half-bridge are alternately turned on and off at exactly the same time.

UL101 (SSC9512S) controller IC, multi-resonant soft-switching half-bridge resonant zero current switching power supply, the floating driving

Road to the bridge MOSFET drivers. Soft-switching at all switching cycles. IC is suitable for high-performance power system is small, High efficiency, low noise, because for different power specifications, more effective and easier to design work function can be achieved, such as self-Dynamic dead-time adjustment, operation and detect uncontrollable and so effective.

UL101 UL101 square wave at the start of the operation pin 16 outputs driving QL101, the main current flows to GND bypasses the TL102,

QL101and CL113. UL101 then square wave output pin 11 to drive QL102, the main current flows to GND, through the current. The flow of change, on the other side of QL102, CL113 and TL102 shunt coil of TL102 will be induced current.

QL101 QL102 When turned on, the main current flow will be consumed by DL101, DL102, RL110 RL111, RL113 and RL114,Prevent QL101 & QL102 be damaged large inrush current and voltage spikes.

UD102 (RT6033) The RT6033 is a 4-channel 260 mA constant-current sink LED driver capable of driving four-channel constant power

Flow Switches Good complementary capabilities and extensive VF changes. RT6033 between the four channels respectively and the IC output current value is less than 3% difference

It provides four channels constant current switching. Through an external resistor (RD159, RD129, RD151, RD131, RD153, RD133,RD155, RD135) back to the RT6033 adjustable 5-260 mA constant current output. PIN7~ PIN14 by QD106,, QD108 QD110 QD112 ON / OFF control of backlight brightness LED, you can also adjust the PWM modulation via pin 5 10% to 100% of the output pulse width. Due to the constant current output differential output channels only 0.5V 260 mAh, which can support a wide Pan of VF. In addition, RT6033 provides dynamic headroom control (DHC) features that generate DC / DC control loop feedback signal and tune Section output voltage. RT6033 provides LED open / short circuit protection. If any channel has an open or short circuit condition occurs, this exception. Output channels will be turned off and the FAULT pin is pulled low. RT6033 also supports over-temperature protection (OTP). When OTP is triggered, the output channels will be turned off and the FAULT pin will be pulled low.

PWB LAYOUT