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Search: Posts Made By: raider988
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-27-2021, 03:46 PM
Replies: 15
Views: 1,399
Posted By raider988
Re: DSLR canon sl2 flash error 50

If the base trace is disconnected, you won't go anywhere with continuity. Try to follow the trace visually.
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-27-2021, 12:00 PM
Replies: 1
Views: 262
Posted By raider988
Re: Dyson Cyclone v10 - Brushes not working

Just a little update on this repair in case anyone will have the same problem in the future.
I managed to remove the board but gave up on tracing the problem, the whole board is covered with an...
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-20-2021, 01:41 PM
Replies: 1
Views: 262
Posted By raider988
Dyson Cyclone v10 - Brushes not working

Hey everyone,
I have this portable vacuum cleaner that works just fine, except for the attached brushes that are completely dead. The vacuum motor has 3 speeds, but the brushes always worked at the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-25-2019, 08:51 AM
Replies: 22
Views: 1,770
Posted By raider988
Re: LPK12-450W safety capacitor shorted

I don't really understand how could it be legal to rent/sell house without outlets properly grounded.
Forum: Troubleshooting Computer Displays 06-22-2019, 05:41 PM
Replies: 7
Views: 1,078
Posted By raider988
Re: Toshiba Satalite C850 lack screen after LCD replacement

I'd check also R3035, it might be pulling the line to ground
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-10-2019, 07:55 AM
Replies: 294
Views: 17,888
Posted By raider988
Re: Soldering station thoughts and guidelines

Yes, it's about 150$ the station alone, plus a decent transformer, a case and the iron.
It would about 250$, but are they worth?
Forum: Troubleshooting Game Consoles & Other Weird Devices 06-10-2019, 04:46 AM
Replies: 15
Views: 1,330
Posted By raider988
Re: NordicTrack C700 Treadmill Dead Console

Just to be sure, you should test that the power supply is doing its job, disconnect it from everything it's supposed to power up and test the 12v line with a load, I'm still on cheap side and use led...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-10-2019, 03:39 AM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Thanks R_J! I have a new update.

While waiting for the components to arrive I thought that I might as well retin the SMD components. You wouldn't believe it, the power supply came back to life. I...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-10-2019, 03:00 AM
Replies: 294
Views: 17,888
Posted By raider988
Re: Soldering station thoughts and guidelines

Looks like I'm a year late for the party... but anyway, has anyone tried to buil the Unisolder from Sparkybg?
Forum: Troubleshooting Power Supplies and Power Supply Design 06-09-2019, 12:52 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Hey guys, finally I'm getting closer to solving the problem. I'm a little ashamed to admit that I cheated my way out of it. I borrowed the same power supply from a friend and the circuitry was...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-09-2019, 01:33 AM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

I replaced the the transistor and nothing changed.
I noticed a coupled things, even without delivering any output voltages, the PSU uses about 400mW. Since I monitor the 400v bulky cap after...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-08-2019, 11:46 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

I checked the transistor, it still reads fine, later I'll swap it with a new one, just in case.
I still don't understand how increasing the resistance of RSENSE would make the supply deliver the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 10:15 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

This is the schematic, T1, T3 and T4 are the transformer's pins, from left to right. Could it be that there's something wrong with the feedback/PWM circuit?

Edit: sorry, vertical image. I checked...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 09:21 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Hi RJ, the NPN reads correctly, I found out that there are 3 types of to-92 BCE configurations, so I concluded it was my fault in getting the wrong datasheet. On the board, the image of the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 06:39 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Solved. The 27ohm sense resistor failed short, I initially thought it read low because I measured in circuit, but once i desoldered it I found out it was damaged. I temporarily replaced it with a...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 05:26 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

I started desoldering some components to test them. On the primary, there's a transistor marked D1302 s .71. It's NPN, I checked the datasheet and I'm not sure if the transisor is bad or the pinout...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 04:59 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Yes, it's a small 22uF 50v. I replaced it and since there are only 5 electrolytic on the whole board, I just replaced them all. No results. I also retouched all the connections, again just in case....
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 02:01 PM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

Hey thank you for the quick answer! It's a small 472k 250v (looks like a class y to me)
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 02:00 AM
Replies: 17
Views: 1,087
Posted By raider988
Re: Nientendo 64 PSU - Secondary side dead

On the primary there's only a chunky 400v 47uF electrolytic cap, 2 class Y and a small film cap, which ones do you mean?
Forum: Troubleshooting Power Supplies and Power Supply Design 06-07-2019, 01:35 AM
Replies: 17
Views: 1,087
Posted By raider988
Nintendo 64 PSU - Secondary side dead

Hey guys. I have this PSU with the secondary side completely dead and I need some help in troubleshooting and I couldn't find a schematic for it. I'm still a beginner in electronics so please bear...
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-10-2019, 10:39 PM
Replies: 12
Views: 933
Posted By raider988
Re: E-cig repair, need help identifying a voltage regulator

I found the solution to the puzzle...

Since most of the evidence was pointing to a boost converter (and now I knew where the output was located), I thought I'd venture into different parts of the...
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-10-2019, 11:53 AM
Replies: 12
Views: 933
Posted By raider988
Re: E-cig repair, need help identifying a voltage regulator

Cleaned it with IP, this is the best I could come up with the phone. The first seems to be T4 or J4. The second is T4.
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-10-2019, 10:39 AM
Replies: 12
Views: 933
Posted By raider988
Re: E-cig repair, need help identifying a voltage regulator

On the oled feedback circuit I get a stable 56K for the resistor connected between FB and GND and 150K (rising up to 450k) for the other one. Also, I checked my schematic again and found an error, I...
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-10-2019, 09:25 AM
Replies: 12
Views: 933
Posted By raider988
Re: E-cig repair, need help identifying a voltage regulator

Ok, I think most of the problem had to do with me having no idea how a boost regulator works and being unable to desolder small 0402 components.

First of all, I desoldered the coil on the other...
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-09-2019, 06:59 PM
Replies: 12
Views: 933
Posted By raider988
Re: E-cig repair, need help identifying a voltage regulator

Sounds promising, but I have a question. When calculating the output voltage with the formula 1.227*(1+R1/R2), I get an output of 2.7v. Considering I measured 4.2v as input, is it possible that when...
Showing results 1 to 25 of 33

 
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