Compact Fluorescent Lamp

HomeHardware-> Compact Fluorescent Lamp Compact Fluorescent Lamp (CFL) Menu Introduction Electrical construction Lamp start Normal operation Failures Repair of electronic Česky English Mechanical construction Reviewing Links Schematics and photos bigluz20w Isotronic 11W Luxtek 8W Maway 11W Maxilux 15W Polaris 11W BrownieX 20W PHILIPS ECOTONE 11W (May 9 2002) IKEA 7W (April 12 2003) OSRAM DULUX EL 11W (November 13 2004) OSRAM DULUX EL 21W (December 3 2005) EUROLITE 23W (October 13 2008) SINECAN 5 2x26-30W (October 13 2008) IMMEDIATELY 25W (March 24 2010) PHILIPS GENIE 11W (March 24 2010) PHILIPS GENIE 14W (October 22 2010) Landlite ballast EBCF-127-120V-LPF 27W (March 5 2012) OSRAM DULUX STAR MINI TWIST 11W (May 13 2014) Introduction Compact fluorescent lamps have some benefits in comparison with classic light bulbs. It is lower power consumption (to 80%) and much longer lifetime (5 to 15 times). Disadvantages are longer starts mainly at more expensive types, impossibility to use darker and price. Fluorescent lamps are available usually in these color temperatures: Warm white (2700K) Cool white (4000K) Daylight (6000K) Most often we meet with "warm white", which is close to classic bulb and which is most pleasant to people. Compact fluorescent lamp use vacuum pipe similar to classic strip lamp and princip of energy transformation to light is same. Tube has on both ends two electrodes faced with Barium. Kathode has high temperature about 900 degree Celsius and generates many electrons which are accelerated by voltage between electrodes and hits atoms of Argon and Mercury. There arise low temperature plasm. Overflowing energy mercury radiate in a UV light form. Inner side of tube is faced with luminophore, which transform UV light in to the visible light. Tube is powered by alternating current, so that function of electrodes (cathode and anode) is still changing. Because there are used switched converter, which works on tens of kilohertz, that CFL lamp doesn't "blink" in comparison to classic strip tube lamp. Converter, which is present in a screw cap, substitute classic ballast with a starter. there are hazard of transistor . D3. Other parts have normal operation function. During start is peak collector current about 3 to 5 times bigger than during normal operation. R3 have protect function. because he has much lower capacity than C6. Circuit contains supply section. After every opening of Q2 is discharged C2. Next are transistors excitated over very small transformer TR1.Electrical construction Princip of function we explain on a LUXAR 11W lamp. C2 and DIAC mades first pulse to base of transistor Q2 and cause his opening. After start is this section blocked by diode D1. In this moment is voltage on a C3 over 600V in a relation to used tube. which includes interference suppressor L2. D2. R6 and diac. bridge rectifier from 1N4007 diodes and filtering capacitor C4. It consists of ferrite ring with three windings (5 to 10 coils). Than the tube lights up is resonation frequency specified by capacity of C3. Now are filaments powered over capacitor C3 from voltage rises from resonant circuit from L1. fuse F1. There is not possible to collect enough energy for reopening of diac. R1. TR1. When the tube is damaged. Lamp start R6. Starting section includes D1. C2. C3 and C6. Next you must leverage more to the opening lamp. 2SC2482. I replaced them with BD129. Original transistors are not available on our market. When the pipe serve out. Q2 and resistors R1. When burns fuse. For example. In a normal situation. but it is not easy to find them. One is plastic cover with holes for pipe and bills. R2. Both plastic parts are clicked to himself and sometimes glued. Second much bigger piece has slots for bills from the inner side. Whet the pipe doesn't lights up on time. Electronics usually survives. Wiring diagrams originates while repairing of lamps and they are only for study or repair uses. Best transistors for replacing of original types are MJE13003. C3 will be practically shorted and thanks to this frequency goes down and changer is now drived only by C6 and changer generates much lower voltage but enough to keep the light on. Look at photo of opened lamp. Mechanical construction Lamp is usually compounded of two parts. R2. Tube is agglutinated to it. Inside is printed circuit board with components and wires from tube. For closing of lamp you can only click both plastic pieces to himself. that current to TR1 increasing until his core is saturated and next his feedback to base drop away and transistor closes. R3. electronics is usually destroyed too. when is shorted capacitor there can be thermally overloaded transistors and will be destroyed. because price of cheaper types are very low now and price of human work is much higher. Failures Common failure is broken capacitor C3. Failures can be multiplied. BD127. When the pipe is old. but they are not available now. when power on. R3 and R5. There exists other variants like a 2SC2611. Repair of electronics Repair of electronics usually means change of capacitor C3 if he is brobek. where are used cheaper components for lower voltage. You can replace fuse with resistor 0R5. Informations are from retracing of lamps and from sources in a link section. From the upper side of PCB are wires to top of lamp. Repairing of these lamps not pay off. Normal operation When the gas is ionisated in a pipe. probably will be damaged transistors Q1. but I am not sure if they will be long-life. When lamp starts.destroying. If doesn't matter size of case TO220. R5. more expensive lamps use a little complicated wiring with electrode preheating and thanks to it they have longer lifetime. BD128. changer is very overloaded and transistors usually doesn't survive longer temperature overloading. it's possible to use transistors MJE13007. when transistor opens. Most frequently lamp fails. there are risk of destroying transistors Q1 and Q2 and next resistors R1. Reviewing Most of these compact fluorescent lamps use same or very similar wiring. Usually you can carefully leverage with a small screwdriver sequently to round to the gap between both plastic pieces for releasing of glue. Now opens second transistor which is excitated by reversly connected windind of TR1 and all process repeats. it is possible mainly at cheap lamps. there can be overburned one of filaments and lamp doesn't lights up anymore. where are soldered or stamped to the contact. . Sometimes can be pipe broken due to internal tension and temperature difference. Photo of opened lamp Bigluz 20W.Links http://www.htm Page with a description of electronic starter in a Czech language.com/stonline/books/pdf/docs/3706.st.cz/stranky/elektro/starter/starter.simandl. .pdf ST | ELECTRONIC FLOURESCENT LAMP BALLAST Schematics and photos Bigluz 20W Compact fluorescent lamp Bigluz 20W use classic wiring with a small changes. Values of parts are modified for bigger power. http://eu. where doesn't exists starting circuit with a diac.Isotronic 11W Lamp Isotronic 11W use a little modified wiring. Lamp starts probably thanks to capacitor C1. . which probably makes light start and filament preheating. .Luxtek 8W Lamp Luxtek 8W use classic wiring with a small changes. Interesting is only thermistor. Photo of board with a electronics and upper side of cover. . Maway 11W Lamp Maway 11W use different wiring too like Isotronic lamp. .Maxilux 15W Lamp Maxilux 15W use classic wiring. . Wiring is classic.Polaris 11W Lamp Polaris 11W has a small thread and changes some values of components. BrownieX 20W BrownieX 20W lamp has a simplified wiring like a Isotronic lamp. PHILIPS ECOTONE 11W . some have destroyed electronics. It is seen. . that electronics probably can live longer. Light color "warm white" brings light of classic bulb and doesn't have a small pink tone like others. which I have from several series have identical color tone and brilliance.Lamp PHILIPS ECOTONE 11W use again simplified wiring like a Isotronic lamp. some have pipe with a lost vacuum etc. Compared to lamps MAWAY.. Tube is a little longer and have much light compared to others 11W types. Photography of opened Philips lamp. This lamp compared to other has a right dimensed components. Wiring is less cheated than others. where every item have different color tone. that lamps from marked manufacturers have guaranteed parameters and better quality than no-name. which is very much stressed.. All these lamps. It has coil L2 for blocking HF interference and capacitor C1 for voltage 1200V. Tube is superior compared to a no-name types. Component values are modified to a lower power. Failure was overburned one of filaments. Lamp was on continuous for one year. Life time corresponds to a label specifications.IKEA 7W Lamp IKEA 7W has classic wiring like a Luxar 11W. Parts are enough voltage dimensed. . which is over 8500 hours. Photography of opened lamp IKEA 7W . . In contrast to a previous OSRAM lamp doesn't have thermistor for slow start. She has a small thread and was a fully functional. OSRAM DULUX EL 21W Lamp OSRAM DULUX EL 21W has a classic wiring diagram. She has overburned one filament.OSRAM DULUX EL 11W Lamp OSRAM DULUX EL 11W has again classic wiring with only few changes. EUROLITE 23W Lamp EUROLITE 23W has a classic wiring diagram. For schematics thanks to Mard. . Ballasts was broken due to blowed electrolytic capacitors. I don't understand exactly why this is wired this way. . Little differency is in powering tubes before D6 diode and wiring of start capacitors C10 a C11 about tubes. Ballast doesn't have fuse. R4. R5 and R6.SINECAN 5 2x 26-30W Electronic ballast SINECAN 5 for two fluorescent tubes has identical circuit like most of compact fluorescent lamps. but only thin wire. It breaks transistors and resistors R3. Circuit is classic. .Photography of open ballast. IMMEDIATELY 25W This bulb is only interesting with power value 25W. It lights up immediately after power-up. I didn't see any negative effect on their lifetime.PHILIPS GENIE 11W Philips Genie bulbs I am using for many years. Their advantage is very compact size of tube which allow installing in to the lamp with small space for bulb. . I am satisfied with them. Disassembled light bulb. PHILIPS GENIE 14W . blog. Schematics is very similar to many other lamp ballasts. Landlite ballast EBCF-127-120V-LPF 27W Nuno Sucena Almeida succesfully repaired ellectronic ballast and sent me his schematics which I now show to you. Transistors are more powerful types 13003. Values of few components are a little changed. Interesting for me is using of voltage doubler because lamp is for 120V but electronics is designed for 230V. Here is original authors article: http://slug. It has two additional protect dioded D6 and D7.aeminium.This bulb has almost identical circuit to their 11W variant.org/2012/03/01/electronic-ballast-repair/ . . OSRAM DULUX STAR MINI TWIST 11W Next lamp with classic design. Only his miniature construction is interesting. It has broken one heat filament. . Disassembled OSRAM lamp. . ©2003-2014 pavouk[at]pavouk.org .