Need help identifying a ceramic cap
Inside the AC/DC adapter for my trusted DLink 614+ WiFi Router I found a domed and dried cap (Teapo 330uF 25V). The router just died one day and I substituted an adapter from another 614+ and found the culprit. In attempting to crack open the heat-sealed case of the adapter I damaged a ceramic disc capacitor in proximity to the edge of the PCB. I have found another one on the board to reference its markings since some of them were damaged. This is the typical radial variety wafer-looking ceramic disc you see all of the time, light-brown to orange in color about 7mm edge to edge. It was in parallel with a resistor and diode on the particular trace that leads to a small transformer marked 04-0222. The reference piece has the markings T01M over DV. The reference piece is paralleled in the same mount holes as a Teapo 22uF 200V and I am sure of the markings. Can anyone tell me what the value of this capacitor is? The ceramic came from the input end of the PCB since the output end has the larger transformer and the domed Teapo cap I mentioned earlier. Damn I hate it that I hurt parts I didn't need to. If I can replace the ceramic then all I have to do is plug it in since the aluminum electrolytic replacement for the domed Teapo is in and ready to go. I miss my 614+. The adapter wasn't hard to fix once I got it open except for damaging the ceramic. Any help is appreciated.
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Re: Need help identifying a ceramic cap
If it is a Zener diode which I think it is you can replace it with anything basically, or just plainly remove it (and watch the d-link fly when you get a power surge)"The one who says it cannot be done should never interrupt the one who is doing it." -
Re: Need help identifying a ceramic cap
Thanks for the reply Per, but I'm thinking it's a capacitor since the legend marking on the PCB is C2. If it were a diode it would be D or ZD. Anyone got any ideas how to determine what this cap is? Wafer ceramic marked "T01M DV".Comment
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Re: Need help identifying a ceramic cap
Are you sure it isn't "101M"? That would be 100pF, +/-20%. Sounds like it's a snubber cap (the resistor and diode being part of the snubber network); are you sure your visual sample is the same value as what was broken?PeteS in CA
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Re: Need help identifying a ceramic cap
Thanks for the reply PeteS. Yes, I am sure of the markings "T01M" on the reference with magnification. Underneath that is "DV". There are only two of these exact components placed on the entire PCB. I've heard of snubber circuits before. You may be right in regards to the damaged component's usage in that respect. In the reference it is placed across an aluminum electrolytic in the same holes- 22uF 200V.Comment
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I read EBOOK of Testing Electronic Component and found that
"In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."
Is it really possible to test small ceramic disc capacitor with analogue... -
Hi folks,
I have a couple of IBM NetVista desktop computers from around 2000-2001. They have Universal Scientific Industrial (USI) Pro286i motherboards, 733MHz Pentium III processors, and a whole bunch of bad Teapo capacitors. One board has visibly bad and venting capacitors, while the other doesn't look too bad so far.
The board with venting caps works fine, while the good looking board occasionally refuses to power on unless it's left for about 30 seconds after connecting the power - even with a known good power supply. (I am however aware I'll need to check the PSU... -
In an unfortunate mishap while attempting to read from the bios chip, one of the smd capacitors took flight and disappeared.
I'm not sure how crucial this smd capacitor is, but it was a brown possibly ceramic one with no notable markings on it anywhere.
I've attached a picture of where it's located on the board.
Does anyone have an HP elitebook 840 g3 who might be able to aid me identifying this component. I'm not sure how crucial it is, but didn't want to risk it.
Thank you for any help you can provide.... -
I have the following ceramic capacitor that I would like to identify. I need to purchase another one like it or an equivalent. Here is the text on the capacitor:
Capacitor is Yellow in color. It has three lines of writing:
VF05
0221
TK RU (RU = Underwriter's Laboratories Logo)
If anyone knows an equivalent on fleabay please let me know. Thank you I appreciate your help.
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My Sparkle (SPI) PC power supply has broken. Originally, there was totally no power output. The 5V-standby was not there. I have replaced a few bulged capacitors but not helping.
I was trying to do more troubleshooting but burned more components. Some got burned so badly that the markings were gone. And also, the markings of a few transistors were gone because the component surface was worn out somehow.
If you happened to have disassembled the same PSU model, please help to provide the markings of some of these components.
See the attached two pictures of the small...09-18-2024, 08:29 AM
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