Hello all and good afternoon,My neighbour was on a decluttering on today and offered me some odd electrical parts caps,resistors etc,I was also given a oscilloscope gos-635g instek branded,i know absolutely nothing about the unit to be honest,was saving it from land fill,are these unit old ? Still used worth any value ? Not switched it on without seeking a manual wouldn't know where to start,any advice or view on my post would be a help.
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Oscillscope question
Sorry have I posted I the wrong group,Comment
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Re: Oscillscope question
budm took time out of his busy schedule to reply your post with a manual/spec link, so I don't think you posted to the WRONG groupComment
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Re: Oscillscope question
ApologiesComment
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Re: Oscillscope question
that looks pretty good, it even has a Z-input.
go here:
http://www.ionpool.net/arcade/tech/s...les/scope.htmlLast edited by stj; 06-20-2018, 10:10 AM.Comment
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Re: Oscillscope question
It should be good enough for some troubleshooting that is not needed for anything above 35MHz bandwidth.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Oscillscope question
Pretty much any oscilloscope is still useful for something but just like anything else, people want flashy new latest and greatest...
Anyway that tutorial stj linked sort of reminds me of when I got my first scope... I had a old tube scope that used a horizontal vernier instead of a detent selectable timebase. It also did not even have a grid on the screen.
When I learned of newer oscilloscopes and how people are always fussing about this so called "calibration" I was both baffled and mortified about it. Kept on using the old tube scope that seemingly had neither.
When I got my first 2-channel scope, this was the first time I encountered a scope with both a detent fixed timebase and this so called "CAL" ... mortified I say! I was so scared of it due to hearsay about "calibration" I avoided setting the scope's front panel into "CAL" in case it fscked up anything. LOL!!!
Of course this was all a fallacy and I use the "CAL" position frequently - which doesn't fsck with calibration, rather, the scope's screen divisions was calibrated to match up when the front panel controls were in the "CAL" position. Oh this is so nice, can actually estimate both frequency and voltage by looking at the screen whereas the tube scope was merely a guess...
Of course now with digital scopes, all of this is measured and displayed on the screen for you, no interpolation (with the screen) or outright guessing (with the hintless vernier vacuum tube oscilloscope) anymore.
Just a bit of silly history with me and oscilloscopes.Comment
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Re: Oscillscope question
that reminds me, i need to replace my graticule backlight on my telequipment scope for a red led.
i wanted to do that after seeing a very old tek valve-based scope with red illumination.
it really stands out with blue phosphor.Comment
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Re: Oscillscope question
Just wanted to know really if these are still a item used as would like to sell in the near future,the other item was rapid ep -603 don’t know a lot about how that either,Comment
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Re: Oscillscope question
If you don't have one and need one, it's invaluable.
If you're shopping for one, low bandwidth analog units are frequently passed on for a digital because it's smaller/lighter/flashier/...Comment
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Re: Oscillscope question
if it works then it will probably get £40-50 if the buyer is close enough to pick it up.Comment
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I am trying to repair an LG split AC indoor unit, which does not start and gives a CH05 error code.
This indicates an error in the communication between the outdoor and the indoor unit.
The outdoor unit is fine, so the problem is the indoor PCB.
The indoor unit is an LG PC09SQ NSJ (3SNM09JA2FA), and the PCB has the following type number: EAX35907219-1.2 (see photo1)
I changed optocouplers ICO1X & ICO2X and the NPN transistor S9013 which drives optocoupler ICO2X (see photo2), but this did not remedy the fault.
Does anybody have the schematics of this board,...02-01-2025, 12:55 PM -
Hi guys,
Trying to salvage a Bose Companion 5 computer speaker system that powers off shortly after powering on. It's got a primary USB input (built in DAC) and an aux 3.5mm input. The USB appears to be the primarily source that tells the unit to power on (control pod LED goes green) as the unit has no power switch.
When I first connect power to the unit, plug in the USB, it will play audio nicely for a minute before it drops out and the unit appears to go into standby (control pod LED goes red). It stays in standby and I cannot seem to power it back on without physically...02-03-2022, 11:14 AM -
Hi all, I managed to narrow down which PCB was causing my Haier AC to throw out an E7 error code (E7 indicates that the indoor unit and outdoor unit cannot communicate). I found that the outdoor unit power board which gives 5v and 15v to the outdoor unit module board fails to fully power up.. The power Led starts to fade in incredibly slowly and the 5v and 15v power buses jump around like crazy and never reach their required voltage. I unplugged the module board from the power board and the power board powered up fine! It had a steady 5v and 15v out and the power LED came on instantly and Bright.... -
I have a Hitachi 57F710E rear projection set with a bad power supply board. I've tried to fix it with help from this forum as well as another one, but without success. Today I found a Hitachi rear projection set for sale on Facebook that looked just like mine. After contacting the seller I found out it was a 51F510. According to the service manuals my set uses a HA01312, POWER UNIT DP4X-DM_24W and the 51F510 uses a HA01313, U901, POWER UNIT DP4X_24W.
Does anyone know if these 2 power supply boards are interchangeable?
Thanks.01-08-2024, 07:53 PM -
Yesterday I successfully repaired a Middle Atlantic UPS2200R-IP that had inadvertently been used as a surge suppressor at our transmitter site. It has already been replaced with an updated one but it's coming home with me now instead of being e-cycled. To be specific, this is the MA model that has the blue backlit display and has been discontinued, although this design may have been used in many UPS units including the smaller Middle Atlantic ones in this series.
Here's what happened: We experienced a brownout/surge at the site, which damaged the UPS and took our broadcasting...
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