Scematic and photos

Scematics and photos

Bigluz 20W

Compact fluorescent lamp Bigluz 20W use classic wiring with a small changes. Values of parts are modified for bigger power.

Photo of opened lamp Bigluz 20W.

Isotronic 11W

Lamp Isotronic 11W use a little modified wiring, where doesn't exists starting circuit with a diac. Lamp starts probably thanks to capacitor C1.

Luxtek 8W

Lamp Luxtek 8W use classic wiring with a small changes. Interesting is only thermistor, which probably makes light start and filament preheating.

Photo of board with a electronics and upper side of cover.

Maway 11W

Maway 11W use different wiring too like Isotronic lamp.

Maxilux 15W

Lamp Maxilux 15W use classic wiring.

Polaris 11W

Lamp Polaris 11W has a small thread and changes some values of components. Wiring is classic.

BrownieX 20W

BrownieX 20W lamp has a simplified wiring like a Isotronic lamp.

PHILIPS ECOTONE 11W

Lamp PHILIPS ECOTONE 11W use again simplified wiring like a Isotronic lamp. This lamp compared to other has a right dimensed components, that electronics probably can live longer. Wiring is less cheated than others. It has coil L2 for blocking HF interference and capacitor C1 for voltage 1200V, which is very much stressed. Tube is superior compared to a no-name types. Light color "warm white" brings light of classic bulb and doesn't have a small pink tone like others. Tube is a little longer and have much light compared to others 11W types. All these lamps, which I have from several series have identical color tone and brilliance. Compared to lamps MAWAY, where every item have different color tone, some have destroyed electronics, some have pipe with a lost vacuum etc... It is seen, that lamps from marked manufacturers have guaranteed parameters and better quality than no-name.

Photography of opened Philips lamp.

IKEA 7W

Lamp IKEA 7W has classic wiring like a Luxar 11W. Component values are modified to a lower power. Parts are enough voltage dimensed. Failure was overburned one of filaments. Lamp was on continuous for one year, which is over 8500 hours. Life time corresponds to a label specifications.

Photography of opened lamp IKEA 7W

OSRAM DULUX EL 11W

Lamp OSRAM DULUX EL 11W has again classic wiring with only few changes. She has a small thread and was a fully functional.

OSRAM DULUX EL 21W

Lamp OSRAM DULUX EL 21W has a classic wiring diagram. In contrast to a previous OSRAM lamp doesn't have thermistor for slow start. She has overburned one filament.

EUROLITE 23W

Lamp EUROLIE 23W has a classic wiring diagram. For schematics thanks to Mard.

SINECAN 5 2x 26-30W

Electronic ballast SINECAN 5 for two fluorescent tubes has identical circuit like most of compact fluorescent lamps. Little differency is in powering tubes before D6 diode and wiring of start capacitors C10 a C11 about tubes. I don't understand exactly why this is wired this way. Ballast doesn't have fuse, but only thin wire. Ballasts was broken due to blowed electrolytic capacitors. It breaks transistors and resistors R3, R4, R5 and R6.

Photography of open ballast.

IMMEDIATELY 25W

This bulb is only interesting with power value 25W. Circuit is classic.

PHILIPS GENIE

Philips Genie bulbs I am using for many years. I am satisfied with them. Their advantage is very compact size of tube which allow installing in to the lamp with small space for bulb. It lights up immediately after power-up. I didn't see any negative effect on their lifetime.

Disassembled light bulb.

PHILIPS GENIE 14W

This bulb has almost identical circuit to their 11W variant. It has two additional protect dioded D6 and D7. Values of few components are a little changed. Transistors are more powerful types 13003.

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. Schematics is very similar to many other lamp ballasts. 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.blog.aeminium.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.