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- Опубліковано 8 гру 2017
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This camera suddenly died, I thought I would have a poke around to see if I could fix it... I didn't dig too deeply, but the answer looked to be a "no".
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Some Of My Electronics Tools (video and purchase links)
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Boonton
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4220.
8210: defs.link/?u=e1eddc
Fluke
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8842A:
45: defs.link/?u=eac51d
343A: defs.link/?u=13c93d
5200A: defs.link/?u=a43c99
540B: defs.link/?u=0c6bd9
893A.
A90.
HP/Agilent/Keysight
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4261A: defs.link/?u=07ed95
5005A.
5342A 18GHz: defs.link/?u=5f7513
6181B: defs.link/?u=b12aef
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DSOX1102G: defs.link/?u=a68d39 defs.link/?u=12d498
E3646A: defs.link/?u=128f4a
Marconi
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2022D.
2955.
TF2103: defs.link/?u=61baaa
Rohde & Schwarz
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SMY: defs.link/?u=93514b
CMU200: defs.link/?u=8ccd72
Polarad SPN: defs.link/?u=2ead82
Siglent
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SDM3065X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDS2102 (hacked to 340MHz): defs.link/?u=1ed0fe defs.link/?u=12d498
SPL-1008.
SDP1168X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDL1020X-E: defs.link/?u=a0eccb
Other Equipment
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KSGER T12 Soldering Iron: defs.link/?u=620ace defs.link/?u=5c112e
Quick 861DW: defs.link/?u=138c0f defs.link/?u=a3fc81
S-993A: defs.link/?u=079677 defs.link/?u=e855a0
EEVBlog BM235: defs.link/?u=12d498
YR1030 Battery ESR: defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: defs.link/?u=8eeeba
Bird 43: defs.link/?u=4b18f7
Sinadder 3: defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: defs.link/?u=a04df2
Korad KA3305D: defs.link/?u=69090a
PDVS2mini: defs.link/?u=869ba4
Valhalla 2703: defs.link/?u=06bcfc
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Mustool G600: defs.link/?u=b8bc26 defs.link/?u=33f0aa
Handheld Equipment
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Uni-T UT210E: defs.link/?u=391ce3 defs.link/?u=ea4edc
DER DE-5000: defs.link/?u=0d9160 defs.link/?u=12d498
MK-328: defs.link/?u=0d9160 defs.link/?u=739ee7
MESR-100: defs.link/?u=0d9160 defs.link/?u=009419
ESR Meter: defs.link/?u=0d9160
HOPI: defs.link/?u=7fab55
PeakMeter PM6252: defs.link/?u=59ef66
HS1010: defs.link/?u=10c699
Thermal Camera: defs.link/?u=280cca defs.link/?u=4a2256 - Наука та технологія
![ОРБАН приехал к ПУТИНУ и "отчитался" о поездке в Киев 😁 [Пародия]](http://i.ytimg.com/vi/_0ukDovOWq8/mqdefault.jpg)
Yesterday I had a complaint from a customer that their camera system was not working. One of the handy instruments I use is a Triplett Camview IP Pro+, allows me to power up many of the cameras and look at the outputs of the cameras, even IP cameras. I can also inject a test pattern into the DVR.
I narrowed the problem to the analog ntsc camera, was getting power OK but no video output. I explained to the customer that hardly anybody actually repairs things anymore and that I would probably just get a new camera. But, I told her I'd take a look at the camera. In this case it is a SPECO analog camera. It had two circuit boards, the first took the 24VAC, converted it to 12VDC. What is most important, it has a transformer so that the 12 volts is isolated from the video ground. It is actually a switching power supply. The 24VAC goes through a full wave rectifier, is filtered by an electrolytic capacitor, then switched by some transistors where the signal goes into a tiny transformer. The output, now isolated, goes through more rectification and filtering, then on to the camera module. There were only three wires going to the actual camera pcb, common (gound), video, and 12 volts input. The 12 volts was only a couple volts. I used a bench power supply and momentary bypassed the power supply board, the camera woke up. Most of the components on the power supply board were SMD, but there were two electrolytics, the usual suspects. I don't normally shotgun a circuit, I try to go directly to the suspected bad component. With my B&K meter, I first checked the capacitance of the one at the first rectifier, the value was within spec and the ESR (very important) was a couple ohms. I then checked the filter cap on the output of the switcher that filters the 12 volts to the camera. The capacitance value was within spec, but the ESR was over 130 ohms. I replaced that cap and bingo, the camera was back to life. I didn't have a schematic, but understanding how switchers work certainly helped. BTW, I could see no physical damage anywhere, no bulging caps, nothing. Hope this helps someone. - Jim
I have a very similar camera module I made a night vision system by removing the IR filter. I bought a composite video transmitter and planned a making a wild life camera I could watch on my home TV. Well another unfinished project. I bought a flir thermal camera last year. Have to say not got much use out of it it’s easier to use a finger as my wife says. Nice video thanks for sharing. Regards Chris.
Goo job, congratulações!)!
Where did you put your multimeter to test that?
Good tiching karte hai 👌👍
Can I extend memory card slot by using 1meter 8 rainbow wire in ip camera's ? Will it works?
did you change the capacitor (hot part)did the camera work again?
I put it back in the correct polarity and it has been fine since.
I've always wanted to replace the camera input with something like an HDMI input. Basically I want to pull apart a wyze cam and hook the HDMI output from my old dvr system and be able to view in the wyze app
Can I get an image like a normal camera with ip camera video output cable.
Sir I have sq13 mini wifi camera but when I connect its wifi then it's video image is x-ray like i.e while image and sometimes it's image is normal good but suddenly it's video gets x-ray like image....sir how to fix it?
Great video. My ptz cam have a mic problem. Always have a bad noise when rec video ot watch online.The cam works around 10 days. What u supose is a problem.
Sorry I don’t know, maybe interference from nearby mains cabling?
was that a "tubed" crystal on the other side? maybe it's bad and the clock speed of the chip going nuts-o in frequency. usually they just don't run at all, but i;ve seen the random odd device go insane speeds
oh wait!!!!, is this where I should point, laugh and yell "u suck" whilst pointing, instead of shooting possibly helpful ideas :)) ( I'm sure you'll get others doing just that)
I should of checked oscillators actually, that is a good point, as you saw I just had a quick stab at it in case it was something obvious.
Hey a poke around is always interesting, put a condom on the probe though :-D
I would check the number on that regulator, just so you know the voltage is right.
The problem is some chips to get hot and thats normal.
You could remove that chip for fun lol :-D.
what I seen out and about today, a condom on your probe likely wouldn't save you :)))