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Search: Posts Made By: sam_sam_sam
Forum: Troubleshooting Power Supplies and Power Supply Design 05-11-2021, 09:00 PM
Replies: 51
Views: 1,633
Posted By sam_sam_sam
Re: Compaq PDP-121P - Baked MOV

Thanks for your reply I sort-a lost track of this post and found it again
Forum: General Electronics Technical Discussion 05-11-2021, 01:07 AM
Replies: 67
Views: 2,726
Posted By sam_sam_sam
Re: Swapping out a NiMh for a LiPo?

Either that or just mad > or just dose not have anything else to do
Forum: General Electronics Technical Discussion 05-02-2021, 01:57 PM
Replies: 13
Views: 292
Posted By sam_sam_sam
Re: Cleaning Off Blu Tac

You can sometimes use brake cleaner to remove glue but spray on the paper towel and wipe but if it is clear plastic it can also cloud the clear plastic test a small spot first

You can sometimes...
Forum: General Electronics Technical Discussion 05-02-2021, 06:13 AM
Replies: 13
Views: 292
Posted By sam_sam_sam
Re: Cleaning Off Blu Tac

Be careful when using WD40 on plastic it can cloud the clear plastic
Forum: General Electronics Technical Discussion 05-02-2021, 04:15 AM
Replies: 6
Views: 202
Posted By sam_sam_sam
Re: B&K Precision 1604A Isolation Transformr,120Vac,150Va,1Phase Feedback wanted

Update

I decided to buy this one instead because of your input on this post

ISOLATION TRANSFORMER ISO-500 - 500VA
...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-01-2021, 11:08 AM
Replies: 51
Views: 1,633
Posted By sam_sam_sam
Re: Compaq PDP-121P - Baked MOV

I have to ask the question isn’t the voltage of 12.8 a little bit high for a computer switching power supply

Most of the time I have seen 11.8 to maybe 12.2 but this is if you are lucky

Because...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-01-2021, 10:59 AM
Replies: 3
Views: 90
Posted By sam_sam_sam
Re: converter dc dc 12/34 volt

“ I would like to replace the resonator too 3 pin ceramic indicated with a black arrow in the photo which I fear was damaged by heat during the disassembly of the controller ”

I can not find what...
Forum: General Electronics Technical Discussion 05-01-2021, 02:08 AM
Replies: 20
Views: 436
Posted By sam_sam_sam
Re: Any ideas Please?

http://ww1.microchip.com/downloads/en/devicedoc/doc0180.pdf

https://www.szgolon.com/search/xq?id=515510

This what I have found it might not be correct
Forum: General Electronics Technical Discussion 05-01-2021, 01:53 AM
Replies: 6
Views: 202
Posted By sam_sam_sam
B&K Precision 1604A Isolation Transformr,120Vac,150Va,1Phase Feedback wanted

I think about buying one of them I would like to know if anyone has used this device before and what you think about it
Forum: Troubleshooting Power Supplies and Power Supply Design 04-27-2021, 03:36 PM
Replies: 23
Views: 714
Posted By sam_sam_sam
Re: Antec EA-430D 5VSB issue

You need to check for short circuit in the primary side of the switching power supply and also check the secondary side of the switching power supply for short circuits as well and use a incandescent...
Forum: General Electronics Technical Discussion 04-27-2021, 03:27 PM
Replies: 2
Views: 131
Posted By sam_sam_sam
Re: MPS2329C and MPS2329 voltage regulators -are these compatible?

Thanks for sharing this information
Have you used this type

Synchronous Buck Converter with Forced Continuous Conduction Mode (CCM)' and the MPS2329 says 'Synchronous Buck Converter'

Not...
Forum: General Electronics Technical Discussion 04-27-2021, 03:13 PM
Replies: 3
Views: 143
Posted By sam_sam_sam
Re: How to solve this career problem ?

Getting parts for anything is becoming a very real problem I do not know what the solution for this issue is but you just have to when searching for parts just pick the supplier that have the parts...
Forum: General Electronics Technical Discussion 04-24-2021, 12:54 PM
Replies: 67
Views: 2,726
Posted By sam_sam_sam
Re: Swapping out a NiMh for a LiPo?

One comment I have is that what I have read about doing circuit traces is that should have rounded curves and not square edges that come to a point

For the life of I can not remember the exact...
Forum: General Electronics Technical Discussion 04-23-2021, 12:44 AM
Replies: 6
Views: 245
Posted By sam_sam_sam
Re: which thermistor for battery pack ?

Nice find for what the problem was
Forum: General Electronics Technical Discussion 04-19-2021, 03:30 PM
Replies: 6
Views: 245
Posted By sam_sam_sam
Re: which thermistor for battery pack ?

This might be a better choice

P/N 1600-10K Thermistor

I could not find the temperature chart for this particular part number

MF52D 3950

You might want to find out what the temperature...
Forum: General Electronics Technical Discussion 04-19-2021, 10:16 AM
Replies: 21
Views: 393
Posted By sam_sam_sam
Re: choosing new battery bms

If it has this it would not be useful unless you disable this part of the circuit

Can you find output side of the power supply to bypass this part of the circuit

Or just get a switching power...
Forum: General Electronics Technical Discussion 04-19-2021, 07:29 AM
Replies: 21
Views: 393
Posted By sam_sam_sam
Re: choosing new battery bms

Is this the type of charger that requires voltage from the battery to activate the charging circuit
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-16-2021, 10:04 PM
Replies: 11
Views: 266
Posted By sam_sam_sam
Re: 878d H-E Error

Post some pictures of this board or boards front and back of the boards
Forum: Troubleshooting Audio Equipment 04-15-2021, 07:27 AM
Replies: 2
Views: 190
Posted By sam_sam_sam
Re: RX V380 Yamaha with intermittent DC protection fault

I would replace all the filtering capacitors for audio output and in coming power supply first I would also replace capacitors that are less than 100uf capacitors
Forum: General Capacitor Questions & Issues 04-15-2021, 05:05 AM
Replies: 2
Views: 138
Posted By sam_sam_sam
Re: Old Cap Series ID in Toyota ECU

Look at this post

https://badcaps.net/forum/showthread.php?t=31674

Look at this website as well
...
Forum: General Capacitor Questions & Issues 04-15-2021, 04:57 AM
Replies: 2
Views: 210
Posted By sam_sam_sam
Re: ESR meter (MK-168) not showing ESR readout on certain capacitors?

Yes they are bad. I will check later to see what you should expect
Forum: Troubleshooting Power Supplies and Power Supply Design 04-14-2021, 11:08 AM
Replies: 11
Views: 322
Posted By sam_sam_sam
Re: CP1500EPFCLCD - failure

If they are mosfet on the heat sinks then you would want to test them to make sure that are working the incandescent light bulb is in series with the battery just in case something goes terrible...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-14-2021, 05:42 AM
Replies: 11
Views: 322
Posted By sam_sam_sam
Re: CP1500EPFCLCD - failure

I would check the devices that the battery terminals are attached to the heat sinks use a 1156 light bulb or a MR16 light bulb 50 watt one on the battery terminal while testing the battery circuit
...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2021, 05:21 PM
Replies: 11
Views: 322
Posted By sam_sam_sam
Re: CP1500EPFCLCD - failure

The first thing I would do is replace the viper ic chip right in front of transformer and the low UF capacitors that are near this chip

I would also highly recommend that you use a incandescent...
Forum: General Electronics Technical Discussion 04-11-2021, 03:17 PM
Replies: 4
Views: 156
Posted By sam_sam_sam
Re: 12 volt switching power supply modification to 14.5 volts before blocking diode a

I did not find the exact one that you have mentioned above but did find a couple of them about issues with them

I saw a video of his that is very similar to one that I have an there is an issue...
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