Cinitec Dvd 2200

i have a cinitec dvd 2200 which is dead the fuse inside is black and a quick reading on the chopper transistor looks like a 10 ohm s/c does anyone have adiagram or any info on this john

shortcircuit123tv said:

i have a cinitec dvd 2200 which is dead the fuse inside is black and a quick reading on the chopper transistor looks like a 10 ohm s/c does anyone have adiagram or any info on this john

Click to expand...

What's a chopper transistor? What's a 10ohm s/c? and what's a adiagram?

Sounds like the fuse blown excessively...therefore a PSU fault? Other comments make no sense.

Standard switch mode power supply design. Mains comes in and does through a transformer to reduce the voltage a little. Then a transistor switches that lower AC voltage on and off very fast into a capacitor and it will stop switching for brief moments in order to maintain the correct output voltage.
The poster is saying that this transistor when disconnected seems to be permantly connecting the supply through (s/c short circuit) with a 10 ohm resistance.

What is the recervoir capacitor like?
This is by far the most common failure and you can often see a slight bulge or crack at the top surface. Alternativly it might be sticking up from the circuit board a little where the rubber bung at the bottom is protruding. When these fail the transistor is put under a lot more load and will overheat and often fail.
Personally I wouldnt bother trying to fix it. You can get new ones for £20 and although new components will only cost a few pounds you need to know what specific types to buy and the time you spend doing it is not worth the saving.

gblades said:

Standard switch mode power supply design. Mains comes in and does through a transformer to reduce the voltage a little. Then a transistor switches that lower AC voltage on and off very fast into a capacitor and it will stop switching for brief moments in order to maintain the correct output voltage.
The poster is saying that this transistor when disconnected seems to be permantly connecting the supply through (s/c short circuit) with a 10 ohm resistance.

What is the recervoir capacitor like?
This is by far the most common failure and you can often see a slight bulge or crack at the top surface. Alternativly it might be sticking up from the circuit board a little where the rubber bung at the bottom is protruding. When these fail the transistor is put under a lot more load and will overheat and often fail.
Personally I wouldnt bother trying to fix it. You can get new ones for £20 and although new components will only cost a few pounds you need to know what specific types to buy and the time you spend doing it is not worth the saving.

Click to expand...

OK, trying to disuade the poster from attempting to fix, as wrong lingo used..chopper transistors don't exist, You can't have a 10ohm s/c, it's either 10ohm, or s/c..Can't read transistors in circuit, as other items in the circuit affect them, they must be removed for testing.

As the mains fuse is black, it blew due to a very heavy load, so maybe a thyristor went s/c, or the main control chip blew, due to a resistor going open or short? Switch mode PSUs are very dangerous things to poke about in, as the main resevoir capacitor can store 600V DC, that means if you touch it, you are stuck to it, and get a whopping 600V down your arm.

And in a switchmode power inefficient power supply that we use nowadays, when one component fails, it usually takes a whole load of other components with it. As your player isn't recognised, hasn't any special features, then the cost of repairing, unless salvaging an identical machine, would outweigh the cost of a new machine.

I want the times back, when you could actually 'fix' something, rather than replace a 'panel', but now the case is throw it all away, and replace with new. Sad times.