Hi everyone, I need to get a scope to test home theater receiver channels, but I don't have a lot of room (for a Tektronix).... Are these little hand held deals like an Owon HDS1021M good enough to check receiver amplifier channels? Thanks!
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Re: 20mhz scope enough to check receiver channels?
What measurements (distortion, noise etc.) do you want to check on each channel?
Some oscilloscopes can measure distortion and noise.My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics. -
Re: 20mhz scope enough to check receiver channels?
HDS1021M
100MS/s sample rate
=
no good
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Rigol DS1050E
1GS/s Sample rate
=)
goodComment
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Re: 20mhz scope enough to check receiver channels?
well I want to be able check output transistors and IC's,,, I guess maybe I should make room for a big boy machine
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Re: 20mhz scope enough to check receiver channels?
Well just to close out this thread I ended up getting an old Tektronix 465!
Now I just need to learn how to use it to check for distortion and noise, etc..
Thanks to all who helpedComment
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Re: 20mhz scope enough to check receiver channels?
For all the uses I can think of, a 20MHz scope is more than adequate for troubleshooting audio equipment. I used an old HP audio scope for years that maxed out at 100KHz. The scope itself is not going to give you THD or IMD readings - its for signal tracing. The only thing I can add is that (as with any piece of equipment), you first have to know what signal you expect to be at a certain point before you go looking around. Have fun!Is it plugged in?Comment
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Anthem MRX500 - no sound
Dear Electronics Experts:
I have the following problem I am trying to troubleshoot. Unfortunately, I have contacted Anthem themselves and even a local distributer but I am not having much luck. Also, I have scoured the internet and unable to obtain a service manual. The Anthem service rep has also replied that he is unable to provide me with any service documentation. I have performed numerous searches on the internet and cross-referenced a few other AV receiver makers (Denon, Marantz, Onkyo) and found certain similarities to block diagram... -
I am attempting to test a samsung power supply board to verify the pfc ic is working. I am powering up the board with my isolation transformer. The board turns on fine but when I attempt to connect the ground for the scope probe, it trips out the isolator. I was taught not to 'float my scope' so I am wondering if I should test without connecting the ground lead or would that be asking for trouble? Not sure how else to test, I don't have a portable scope. I could plug direct to mains power but that would bypass the safety factor.Today, 11:00 AM
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Hey fellow solder fume lovers, I have a Vintage Sony Receiver STR-4800 SD that has me stumped.
The Balance Pot has to be set at about 30 degrees (11 o'clock) to the left for the output to be balanced (see photo). I'm using an oscope, sig gen 1kHz sine, 8 ohm dummy load).
When output is balanced (11 o'clock left) both channels clip at about 19 vac / 45 watts RMS, Amp is rated at 35 watts so I know the amp modules are good. Square wave also looks good when turning bass & treble pots and is in phase.
I pulled the balance pot, (Dual 10K MN Taper) cleaned with... -
For this Dick Smith TV GE6878 (Thompson) I replaced the broken remote with a universal it kinda works though if its more than a few meters away sometimes the buttons register and sometimes they wont so I bought another remote from another brand and it has the same problem, I've had an old TV in the past that the sensor died completely and I replaced it to fix it could this be a similar problem? I tried looking for a service manual, spare parts for a receiver and a parts list but I couldnt find any info. can someone please help me to find the info online for a service manual or where I can buy... -
Everyone -- I am trying to troubleshoot my NAD C740 stereo receiver, which either won't power on or won't consistently stay powered on.
I will start by saying that I am a hobbyist, and while I am decently handy with basic DC stuff, I am more hesitant when it comes to mains-powered equipment (that is, reluctant to poke around with a multimeter when it is powered on)
The central issue is that after a long period of non-use, the receiver powers on and all functions seem to behave normally, but after a couple of minutes, it powers itself off.
If I attempt...
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