neg2013

14.048

hace 5 años

Good afternoon: It still has an important short circuit in the vertical stage ... The diode that says, supplies a negative voltage of 14 volts, part of the same power supply, that is, it is one of the secondary voltages. It is a fast diode FR154: 400 volts for 1.5 Amps, it is not commercial in my locality, so if you can use any other fast 2 Amps diode or go directly to those of 3. Changing also the one that supplies the + (MAS) 14 volts.

ruso121

30

hace 5 años

I mean changing the two diodes, apart from the fr154 which recommends me to have the specifications of 2 or 3 amps, if by chance you will have the diagram of this chassis I thank you very much

neg2013

14.048

hace 5 años

Well, diagram can be searched on the WEB, since Yoreparo can not be attached for a long time, the causes are unknown. Now with respect to the diodes, try to recover some of them in a plate that has thrown in the workshop. If you want to buy new ones, they can be the UF5408, these are 3 Amps per 1000 volts (It is UF that has nothing to do with the 1N5408) ... The BY299 comes to mind, I think you can use them .. But you have to look for the short circuit before anything else

ruso121

30

hace 5 años

friend thank you for all the information you have given me has been helpful

ruso121

30

hace 5 años

friend excuse me a question, the vertical ic goes straight to the heat sink or carries an insulator

neg2013

14.048

hace 5 años

At least the ones I always found on TVs, I didn't see that they carry a plastic bushing, or mica ... But if you want to use them, I don't see why ... The heatsink has to be insulated from mass in the chassis ...

angels figuereds

513

hace 5 años

friend check if the heatsink is grounded if it is a if you put a mica and an insulator on the screw

JoseO

1.634

hace 5 años

If the IC is powered with +15 and -15 voltage if it has insulation from the heatsink it is connected to ground, but if pin 4 of the IC is connected to ground just like the heatsink then it does not need isolation, greetings

ruso121

30

hace 5 años

friends I thank you for all the collaboration in this post, place the insulator with the diodes that the chassis brought, and everything was perfect