bobbriessinck
Member
- Joined
- Feb 26, 2020
- Messages
- 6
Hey,
up until recently both my 51X racks & PSU worked just fine, but ever since I took one to another studio with me they've been acting weird, and now they're not working anymore. If I power up the PSU without any rack attached all the voltages measure fine (a bit above the voltages they should be at but I imagine they drop a V with load?), but once I attach a rack and power it up all the LEDs go out except for + and - 24V.
I've measured the voltages with 1 rack attached, results below:
+48V: 121mV
-16V: -304mV
+16V: 520mV
+24V: 24,96V
-24V: -24,87V
+48V: 123mV
The relays of the 500 unit click when I power the PSU on, but the LEDs don’t work, the VU of the LA500A (JLM) lights up but others don't show any sign of life besides a possible relay click.
Any idea what could be happening here? I'd like to check if there's a simple solution for this before I take the racks apart. It's just odd that they both do it with both power cables, but only 1 traveled with me outside of the studio.
I have to mention that in the other studio some of the 500s didn't work eventhough I slided them in with highest caution en checked if they were in the correct position. We were under big high pressure working against the clock and I didn't take the time to remove them from the chassis, I should've done that immediately. Then again, only one of the racks left the studio and they both experience the power drop, so my guess is that the problem lies within the PSU? At least I hope so. In coming days I'll check the 500s in a regular Fredenstein Bento to see if they're alright.
Thanks for checking this out!
Bob
up until recently both my 51X racks & PSU worked just fine, but ever since I took one to another studio with me they've been acting weird, and now they're not working anymore. If I power up the PSU without any rack attached all the voltages measure fine (a bit above the voltages they should be at but I imagine they drop a V with load?), but once I attach a rack and power it up all the LEDs go out except for + and - 24V.
I've measured the voltages with 1 rack attached, results below:
+48V: 121mV
-16V: -304mV
+16V: 520mV
+24V: 24,96V
-24V: -24,87V
+48V: 123mV
The relays of the 500 unit click when I power the PSU on, but the LEDs don’t work, the VU of the LA500A (JLM) lights up but others don't show any sign of life besides a possible relay click.
Any idea what could be happening here? I'd like to check if there's a simple solution for this before I take the racks apart. It's just odd that they both do it with both power cables, but only 1 traveled with me outside of the studio.
I have to mention that in the other studio some of the 500s didn't work eventhough I slided them in with highest caution en checked if they were in the correct position. We were under big high pressure working against the clock and I didn't take the time to remove them from the chassis, I should've done that immediately. Then again, only one of the racks left the studio and they both experience the power drop, so my guess is that the problem lies within the PSU? At least I hope so. In coming days I'll check the 500s in a regular Fredenstein Bento to see if they're alright.
Thanks for checking this out!
Bob