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Velodyne F1800RII schematic
Velodyne F1800RII schematic
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Old 22nd April 2016, 06:13 PM   #1
fcel is offline fcel  United States
diyAudio Member
Join Date: Sep 2001
Location: LA County
Default Velodyne F1800RII schematic

I'm trying to fix my Velodyne F1800RII subwoofer where once it's switched on, it will produce a low to loud humming sound for about 20 seconds, then it will produce a loud pop, and then it'll repeat itself; the whole time the front LED color is showing green, not red.

What I have done so far:
1) I have already taken out the back plate/amp and from a visual inspection, nothing looks out of place. For example, I did not see any busted capacitors although I could not tell if the Class D amplifier is operational or not because it's located inside the aluminium shape "can".
2) I have searched this web site to see if this issue had ever been discussed but could not find any.
3) I have contacted Velodyne to see if they could send me a schematic. After a week, I was informed that they no longer have the schematic for this model.

So, I'm wondering if any member here have a schematic of Velodyne F1800RII that you could share. Worse case scenario, I'll try to fix it without a schematic; please chime in to provide some pointers. Thx.
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Old 26th April 2016, 02:30 AM   #2
fcel is offline fcel  United States
diyAudio Member
Join Date: Sep 2001
Location: LA County
Update: replaced a 10microfarad 50V capacitor near a voltage regulator has fixed the problem.
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Old 1st May 2017, 10:03 PM   #3
RussSeib is offline RussSeib
diyAudio Member
Join Date: May 2017
fcel were you ever able to find a schematic. I have been searching like mad for one with no luck. I have some caps and diodes or transistors blown inside of the amp and can't read what they are.
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