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Decoders
Movistar Decoder DSB646V Does not turn on
184
hace 5 años
hace 5 años
The source was opened and the source was located, the main capacitor open 47uF at 400 Volts, it was replaced, and the equipment turns on the power pot led but does nothing more. the source components were verified and everything goes well.
The connector that leaves the source to the main board SKP100, gives the following measurements
Measurement performed with the control card connected (Green card)
Pin 1 = 9.16 Volts
Pin 2 = 6.18 Volts
Pin 3 = 6.14 Volts
Pin 4 = 10.55 Volts
Pin 5 = 31.80 Volts
PIn 6 = 10.45 Volts
Pin 7 = GND
With control board disconnected
Pin 1 = 6.82 Volts
Pin 2 = 3.96 Volts
Pin 3 = 4.00 Volts
Pin 4 = 7.68 Volts
Pin 5 = 25 Volts
PIn 6 = 7.10 Volts
Pin 7 = GND
Smsd fuses and resistors were tested, without finding any defective.
If they could indicate how the ignition order works.
I appreciate your guide to locate this fault
hace 5 años
hace 5 años
Irwin s friend change the 2 condenser of 470uf 16v that are on the plate the two thickest and wash the plate with water and rinse it well with clean water shake it well and place it in the sun for 2 to 3 hours and then the weapons. I hope to help you and circulate you
hace 5 años
hace 5 años
Good repair one and the solution was to change the electrolytic 470 uf 16 v the first one you get on the motherboard where the volt connector are ,,,,,,, I got a 646 like the one in the photo but it returns me the voltage to the source ,,,, and a 636 model earlier than the one shown here in the photo and the 7-pin TOP245PN integer integrated, plus the fuse at the source input.
184
hace 5 años
I did not return it to the client. I got the main capacitor bad and an avalanche diode at the source. I got another one and the main capacitor was bad, I changed it and it worked well.
11
hace 5 años
I have already repaired several its problem is the wear of the main capacitor 47uf 400v
and apart we have hidden the source controller which is the one that has a heat sink.
184
hace 5 años
Check the power source that is giving the corresponding voltages. Check the electrolytic capacitors, and there is an avalanche diode, which does not equate.
1
hace 5 años
Very good day, my friends, I'm sorry for missing you is that in my country Venezuela the communication is chaotic I tested the main decoder card mentioned above and tested all the capacitor values with the energized board and checking with the values of another board that is in good condition There is a capacitor that shows a very low value of 0.01 which is 1uf / 16v and on the board that is well marked 1.36v I proceeded to change it but I did not find the same one I found were capacitors of greater value 1uf / 50v but I don't know if this will help me and if that would solve the problem too
184
hace 5 años
If it works, always let the voltage be higher than indicated. Check the main capacitor, usually one of the terminals is broken internally, and an avalanche diode that is the source.
1
hace 5 años
good friend josé C I still have not been able to repair the decoder 646 that I said does not turn on just turn on the red LED then try to turn green, that is to say, blinking but cannot turn green, he told me to change two capacitors and an avalanche diode which I don't know where will it be located ???
1
hace 5 años
On the other hand friend José C I put another source of power from another decoder equal to this one that is almost new and works correctly and does not start doing the same so I rule out that it is the source of power and the problem must be in the logic board where Does the CU350 capacitor of 1UFx50v value have no voltage and change it for a new one and does not give voltage on that capacitor either?
hace 5 años
hace 5 años
Good afternoon, friend please if you can help me: I am repairing the source of this deco, it is identical to that shown in the forum photos. Please, if someone can help me and tell me the model of the RP12 transistor, it is the transistor that appears in the first photo number 5 located below and to the left, it is at the top of the white 7-pin connector that is seen there in the photo .. I got it but the transistor didn't come, possibly they removed it to replace it worse I don't know what value and model it was ... Can anyone help me?
hace 5 años
hace 5 años
Good edgarvargas, if what you are looking for is the RP12 value that is a resistance of 51 ohms 5% or if it serves you the colors green, brown, black and gold, I hope it helps you
hace 5 años
hace 5 años
Friend edgarvargas, what he looks like a transistor looks like is a programmable zener TL 431, on the card he is identified with up3, the rp12 as Rafael Marquez says is a 51 ohm resistor
hace 5 años
hace 5 años
friend I have a DSB646V that doesn't turn on. Its fault is that it burns a diode that is next to the 1000 16v capacitors. lme it was repaired and when I installed it it lasted 4 minutes and it smelled burnt and turned off
hace 5 años
hace 5 años
Amigo toledo changes the 2 capacitors of 1000 uf 16v usually swell that is the fault and ready the diode you can check it to see if it is bad but it is difficult to burn.
hace 5 años
hace 5 años
Good afternoon friends . I have a decoder that didn't turn on the red light. After having changed the main consensus, it turns on the red light but does not pass from there. in the main 47uf x400v capacitor I have 160 volts DC in the 1000x16 capacitors I have 4 volts (the capacitors are new because I replace them) at the source output I have the following voltages:
pin 1 8v
pin 2 5v
pin 3 5v
pin 4 15 v
pin 5 26v
pin 6 8 v
pin 7 gnd
I would like to know if they know what voltage I am missing or if they are the corresponding voltages or not.
and please help, I have a diode Schottky barrier. What measures me is the 0.100 diode scale, is that ok?
184
hace 5 años
It must be in the model they have that is different. I no longer have this equipment to verify. I returned it to the client. To locate the avalanche diode at the source you must see the number of each one and look for its data sheet. This source always fails by the main capacitor, from 47uf to 400 volts
184
hace 5 años
No, but even when you repaired the source, disconnect it from the main card and test the voltages that come out of it, and see if they are stable, that is, if they do not vary. Because it seems that it is not lighting the main board due to the lack of a voltage. You can reflow the processor at 325 degrees with 4 air for one minute, see if it reacts.
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