PM3267 for only a dollar - Page 1
Forum section: electronics / testgear

author: V3r50n
author_rank: Newbie
timestamp: October 07, 2013, 07:04:09 pm
content: Hey guys, I am new to this thread but I have been watching the videos for a long time now. I got this scope for only 1 dollar off ebay (worth the gamble), however I only was able to get this for the square wave. I think there is a problem with the x positioning. I was wondering if any of you guys had a idea if it would be a easy fix or not. Here is a picture of it trying its hardest to get that square wave.

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 07, 2013, 07:09:34 pm
content: Is the A channel doing the same? What happens when you disconnect the probe from the CAL signal and touch the end of the probe with your finger? After all it could just be a broken calibrator signal. Or maybe the probe is broken, try a wire from the BNC to the CAL.

author: Sylwerdragon
author_rank: Newbie
timestamp: October 07, 2013, 07:48:02 pm
content: Send it to Dave he will fix it for youha ha ha. but anyway i'm not similar with these old ones. I got only new digital one.

author: jancumps
author_rank: Unknown
timestamp: October 07, 2013, 08:08:38 pm
content: I don't see anything odd on your settings.Is the Y signal ok? Have you tried measuring a DC signal with it (say a 1.5V battery)?For the X signal, do you have some function generator (or an arduino)?I'm used to Philips scopes of that area but not this one. The only functionality I'm not familiar with is the delayed timebase and the Trig View button.

author: Stonent
author_rank: Super Contributor
timestamp: October 07, 2013, 10:52:45 pm
content: What happens on 2 mV / div setting?

author: V3r50n
author_rank: Newbie
timestamp: October 08, 2013, 02:38:11 pm
content: Brand new probes and both channels do the same thing. I will try your guys suggestions when I get home from work and post some new pictures. But it really looks like the dang thing is stuck in the Y axis. Hell actually ill make a short video of what is going on for you guys.

author: madshaman
author_rank: Frequent Contributor
timestamp: October 08, 2013, 02:48:04 pm
content: This seems odd. The scope's horizontal stuff is obvious working or it wouldn't trace a line like that.Add to this that vertical stuff seems to respond to voltage, I'm going to second that it's the cal generator which isn't oscillating.Can you connect an iPod or any music player to it? You can sacrifice some cheap earphones and strip out the wires in the cable, and connect it to the bnc connector however you're able.

author: madshaman
author_rank: Frequent Contributor
timestamp: October 08, 2013, 02:51:32 pm
content: Wait, what frequency is the cal signal? Did you adjust your time settings to correspond? Are the settings in the picture the ones you used to test it?

author: madshaman
author_rank: Frequent Contributor
timestamp: October 08, 2013, 02:55:48 pm
content: I could be dreaming, but I see a ~= 2kHz or higher waveform in that trace.Like the other poster, what happens when you lower the volts/div?

author: V3r50n
author_rank: Newbie
timestamp: October 08, 2013, 09:25:06 pm
content: Here is a little youtube video I made trying to go through all of what you suggested.

author: Stonent
author_rank: Super Contributor
timestamp: October 08, 2013, 11:22:46 pm
content: http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Philips/pm3267_pm3267u.pdfThe section starting on page 54 has the full check procedure.Also just to make sure, you're running at the correct input voltage right? I.e. 240 for a 240 scope, 110 for a 110 scope?Part 4.3 shows you the button settings to test it.