Re: function?
If anyone cares,,,, I replaced the invertor for 13$ from ebay and it works great now...
If anyone cares,,,, I replaced the invertor for 13$ from ebay and it works great now...
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This is a new item at Electronic GoldMine that has arrived within the last few weeks
Here is the link for them I know for sure that it works because ( I tried it on mine soldering station ) I bought two of them and I just bought two more of them so I have some extra replacement ones in my parts bin
Stahl Tools DDDS Replacement Iron for DSDS Stahl Solder Station
https://theelectronicgoldmine.com/products/g28392
One note it will not work for the ZD-917 or similar model number that does not have the sleep function that are the same iron but the plug only...11-24-2024, 01:25 AM -
Hello everyone, I'm troubleshooting an MSI Delta 15 (MS-15CK1) motherboard, and I need help identifying the function of the two coils marked in the attached image. The laptop powers on and responds to the keyboard, but the screen does not turn on-neither the LCD nor the backlight. I've checked the main power rails, and all other coils seem to have the expected voltages:
• 0.91V for the GPU
• 1.7V for VRAM
• 3.3V and 5V rails 1.8V for the BIOS
• 0.9V for the CPU and iGPU 1.2V for the RAM
However, these two coils are not showing any voltage.... -
Hi,
I am repairing a ups which doesn't turn on ,it has the following ICs:
SG3525 used to drive inverter mosfets.
couple of uc3483, one for the power supply and another to drive a big mosfet at the output stage(i think the technique is called boost)
A LM358 and TL074 for control mechanism and of course the uController.
The SG3525 is shutting down every time the ups is turned on.
I want your help to know the function of LM358 and TL074 in the system.
I reverse engineered the LM358 circuit and i think that one of the block(A) is used for battery level... -
BOOST CONVERT CONTROL IC
The FP5139D-LF, FP5139DR-LF, FP5139W-LF, FP5139WR-LF, FP5139T-LF, FP5139TR-LF is a boost topology switching regulator control IC for battery-used applications field. The FP5139 includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operating mode or standby mode.
FP5139 FEATURES...10-07-2024, 05:15 AM -
I can't find a forum to discuss "instrumentation Troubleshooting", but PS maybe the closest.
So, I'm having an issue with about 13 year old Agilent Function Generator. it works, passes self-test, but it has an annoying "audible" noise, that changes as I change the output frequency setting of the instrument. Prominent around 600 Hz and up (at least that's what my ears are picking up.) I saw on some forms that it could be fan, linear regulator, dried up caps,... I can't seem to find the source of audible noise. Here is what I tried:
1. Turn the output off - still...
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