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Search: Posts Made By: clearchris
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-21-2019, 09:26 PM
Replies: 6
Views: 389
Posted By clearchris
Re: Upside down bga reflow?

Can confirm. An employee put a digital scale on the induction cooker when off. Something fell and hit the button to turn the induction cooker on. It was on for maybe a few seconds, that scale was...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-21-2019, 09:22 PM
Replies: 91
Views: 2,257
Posted By clearchris
Re: Does flux expire ?? Flux discussion.

Can confirm momaka's experience with kingbo. It has darkened, especially where I dip the tip in. When new, it was a light cream color. Still seems to work just fine. It does smoke a lot, I hold...
Forum: General Electronics Technical Discussion 06-21-2019, 08:55 PM
Replies: 34
Views: 3,862
Posted By clearchris
Re: Blendtec smoother 13 repair.

I have repaired a few vitamix blenders. If I have the motors out, I usually replace the bearings also. IIRC the vitamix blenders take standard 608 bearings. I don't recall them being particularly...
Forum: Troubleshooting Game Consoles & Other Weird Devices 10-03-2018, 09:45 AM
Replies: 13
Views: 1,285
Posted By clearchris
Re: Li-ion AAA replacement with li-ion pack

That presents quite the conundrum. The device doesn't function well at around 70% battery or lower. I don't think it deals well with the voltage sag. The bluetooth connection barely works, I have...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2018, 10:29 PM
Replies: 13
Views: 1,285
Posted By clearchris
Re: Li-ion AAA replacement with li-ion pack

It could be, though from the spec sheets I read, these chips have very little draw. I did later get a reading of 97%, so I'm optimistic about that.

Not sure what the voltage is, but the 70%...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2018, 09:15 PM
Replies: 13
Views: 1,285
Posted By clearchris
Re: Li-ion AAA replacement with li-ion pack

Yep. IIRC, I have never seen it at 100% even when new. I checked yesterday and it read 97%. I don't ever believe the stated rating, but my new no-name battery probably does have more mA vs the...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-16-2018, 03:02 PM
Replies: 13
Views: 1,285
Posted By clearchris
Re: Li-ion AAA replacement with li-ion pack

So far, so good. It's reading 94% charged, which is better than the 70% charged the old batteries would show. I don't know that it will ever be fully cycled, it gets used for a few minutes and put...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-14-2018, 03:46 PM
Replies: 13
Views: 1,285
Posted By clearchris
Re: Li-ion AAA replacement with li-ion pack

They do appear to be in parallel, but from my readings on li-ion charging it's not neccessarily a problem. You have to build a "balance" phase into the charging. At any rate, I think I'm going to a...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-13-2018, 06:12 PM
Replies: 13
Views: 1,285
Posted By clearchris
Li-ion AAA replacement with li-ion pack

Ok, I have this device, a skulpt chisel. It's acting funky, and the battery never goes higher than 70% charged anymore. I popped the case open, and instead of NiMH batteries I was expecting (older...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-09-2018, 11:45 AM
Replies: 12
Views: 1,085
Posted By clearchris
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-26-2018, 10:24 PM
Replies: 23
Views: 1,400
Posted By clearchris
Re: First QFN removal with budget solder Huakko station 998D

Damn, I wouldn't try an agp connector without some serious hot air and maybe some chip-quik. Pretty impressive that it could keep up though.

My hakko 888 does have some challenges with large...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-26-2018, 10:10 PM
Replies: 17
Views: 4,020
Posted By clearchris
Re: New Aoyue 852, experiances / opinions ?

Yeah, someone actually reprogrammed their hot air station to be PID controlled. All the instructions, hardware and code are out there to do it if you have the time. This hasn't made it onto my list...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-26-2018, 10:08 PM
Replies: 23
Views: 1,400
Posted By clearchris
Re: First QFN removal with budget solder Huakko station 998D

Yeah, it's the tip that came with the hakko iron and it works awesome. Excellent heat transmission, durability, cleans and tins like a dream.

I didn't realize you could buy name brand hakko T12...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 02-19-2018, 06:29 PM
Replies: 8
Views: 1,454
Posted By clearchris
Re: Tutorial/schematics of Printers/Copiers

A long time ago, I used to repair printers. Yes, service manuals are available, and in most cases, they are actually very good.

I have never seen a schematic for a controller board, and I have...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-19-2018, 06:20 PM
Replies: 23
Views: 1,400
Posted By clearchris
Re: First QFN removal with budget solder Huakko station 998D

My kingbo flux laughs at 98% rubbing alcohol. Also tried everclear, no love. Haven't tried acetone because it does dissolve a lot of plastic.

I have a real Hakko chisel tip, and no problem...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-19-2018, 05:46 PM
Replies: 6
Views: 788
Posted By clearchris
Re: Android Oscilloscopes , Cheap and good enough to test PSU ?

When you need to get rid of your scope for "bench space" you need a bigger bench.
Forum: Other Devices with Bad Capacitors 02-11-2018, 09:45 PM
Replies: 48
Views: 2,793
Posted By clearchris
Re: Oven broiler stuck on!!!!

I concur with longbow. I repair more kitchen equipment than I'd like to, and relay/contactor failure is fairly common in ovens. I'd replace all the caps too while I was at it just because I had the...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-11-2018, 09:37 PM
Replies: 26
Views: 2,123
Posted By clearchris
Re: Solder differences and desoldering tools/technique

To replace caps on motherboards I often use a hot air SMD station (preheat), soldering iron and desoldering gun. On stubborn caps sometimes I heat each lead and gently rock the cap back and forth...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-11-2018, 09:23 PM
Replies: 23
Views: 1,400
Posted By clearchris
Re: First QFN removal with budget solder Huakko station 998D

I'm quite happy with my kingbo flux. Fluxes great, yeah, lots of fumes, don't breathe it. Clean-up requires brake cleaner, I haven't found anything else that will dissolve it. Mine has also turned...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-05-2018, 12:00 PM
Replies: 4
Views: 2,035
Posted By clearchris
Re: *&^%ing wall-warts

I replace my router caps every 2 years. I write the date of last replacement on the bottom of the router. Power supplies get replaced when the routers start getting random reboots every 2-3 years. ...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-21-2018, 01:25 PM
Replies: 23
Views: 1,389
Posted By clearchris
Re: LiteOn lit on fire in HP Scanjet 5

You were right again. It did need power good to turn it on. I traced it back to the chip that does provide power good and found that the supply was only getting 3.6v when the chip requires 5-35v. ...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-17-2018, 08:46 PM
Replies: 23
Views: 1,389
Posted By clearchris
Re: LiteOn lit on fire in HP Scanjet 5

Ok, I'm clearly missing something here. So I'm going back to basics.

1. If I bridge emitter and collector of the optocoupler, I get -12v at the outputs.
2. I have replaced the optocoupler...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-17-2018, 06:56 PM
Replies: 23
Views: 1,389
Posted By clearchris
Re: LiteOn lit on fire in HP Scanjet 5

That's much easier than replacing the part to test. It worked! Now to replace the part.

Thanks!!
Forum: Troubleshooting Power Supplies and Power Supply Design 01-17-2018, 05:07 PM
Replies: 23
Views: 1,389
Posted By clearchris
Re: LiteOn lit on fire in HP Scanjet 5

If you can see what I think you see, that's pretty amazing!

I'm looking out the -12v output regulator. It's getting 15v solid on pin 1 when the ps is on. Pin 3 (ground) is what is hooked up to...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-16-2018, 09:56 PM
Replies: 23
Views: 1,389
Posted By clearchris
Re: LiteOn lit on fire in HP Scanjet 5

I got snowed in today, or what passes for it in Texas. So I spent my day in front of the fireplace reading about switched mode power supplies and watching tutorials on youtube. I think I might have...
Showing results 1 to 25 of 227

 
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