2SC3306 DATASHEET PDF

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Oct 18, 9. The fans are wired to run all the time. The ESR of the big caps is climbing with every troubleshooting attempt. Usually with this type of psu, there will be a delay to get the 12v up working, then it will power the peltiers, there must be a slave smpu on the board to give the ic its 12v. Yes, my password is: Oct 18, 4. In this Teardown Tuesday, we are going to take a look at the inner workings of a radar gun! You May Also Like: Oct 18, 7. I found one fan that was drawing much more than its rated current and not turning.

It shows about 1. Ok, sorry it took me a few days to get this check done.

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2SC3306 Datasheet PDF

Oct 18, 8. The relays are energized to remove power from the peltiers as datqsheet for proper cooling. Dec 4, Oct 18, 6.

Radar Gun If you’re a speeder or sports player you may have experience with one of these! As soon as I get the lager caps in I’ll change them all just in case. Dodgydave – Yes, it is a 12V output supply. Once the power supply is up and running, I can plug the coolers back in and the unit cools perfectly.

Jun 22, 7, 1, Oct 17, 1.

2SC Datasheet PDF –

No, create an account now. Dec 26, 7 0. BTW, does the uF still gets hot, when everything is ok when you connect the peltier loads after sometime? Can anyone tell me what type of SMPS this is? Clearly didn’t know that. Your name or email address: Do you already have an account? AS to the cooking switch transistor: Anything else I should look at? Switch Mode Power Supply Posted by zulkifli in forum: If the peltiers are plugged in at power up, the voltage between pins 12 and 7 is about 1. I just can’t get the power supply to fully power up without manually disconnecting the peltiers then plugging them back in.

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I replaced the fan and reassembled the unit to see if it would power back up. As soon as the peltiers are disconnected the voltage jumps to 12V and the rest of the unit powers up fans, LCD, etc Oct 17, 2.

The other parts that get stressed are the snubber R-C components, hard to pick out without a schematic.

It could be that the soft start circuit is not ok. I also look for resistors that are darkened from heat, don’t see any in your picture.

Not obviously bad, but certainly not good. Is this a common problem with a SMPS? Oct 17, 3.

Oct 18, Could this be causing the problem? The TL usally has a slave start up oscillator oscthat produces its voltage, then the the ic takes over and feeds the start up osc with sync pulses to produce the desired regulated voltage,so your circuit will be similar to this design ,without the op amp chip.