Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Seduction => Topic started by: JKay on March 06, 2021, 07:54:54 AM
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Hi Guys,
It's been a long time since my last post and am looking for some help. I just got a new Fluance table and had it running through the Seduction fine for a about an hour. I came back the following day and no sound out of the Seduction. I did all sorts of troubleshooting and even swapped it out for the Eros in my main system. Still no sound.
I went though all the resistance checks and voltage checks. The only ones that look wrong are A8, B8. These are supposed to read 1 Meg ohm+. My reading was OL. I double checked this. All the LEDs on the board and near the tube sockets are lit.
Any ideas on what this could be? There's a chance that the input and/or output RCA's were unplugged by accident while the Seduction was on, but I really can't be sure.
Thanks,
John
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Pin 8 on each tube socket is the cathode, which goes to ground through an LED and isn't going to show much as far as resistances go. Pin 2 on each 9 pin socket would show a 1 meg resistance.
On the old Seduction C4S boards there are four wires that leave the board and go to the area around the 9 pin sockets. what DC voltages do you get at each of those pads?
If you lost both channels, I would bet that your tubes aren't glowing, can you have a look to see if they are? If they aren't, that's a pretty easy problem to debug on its own.
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Thanks for the fast response!
Pin 8 on each socket is showing 0.L on my meter, which is infinite resistance, right? Pin 2 on both sockets show 1 meg.
Here's my voltage readings:
From lower C4S board
A7/B7 0V, 0V
A8/B8 1.5V, 1.5V
A9/B9 0V, 0V
From upper board
27/37 70V, 66V
34 125V
42 61V
32 65V
42 61V
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I rechecked my resistances and found a few changes. A3/B3 read 0.L. Pins 12, 15, and 25 all read 0.L (these are the positive terminals on the 3 large electrolytics). I did drain these caps before taking any resistance measurements.
The tubes are lit. These are new tubes that I put in after I started having issues.
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Paul,
I decided to throw it back in my system to try and it's making music again. Maybe I have a loose connection somewhere. I'm open to suggestions as to any particular points where I need to reflow some solder.
Thanks for your help!
John
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These are the points where you want to measure DC voltage.
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Measured:
42 Black 61V
37 Yellow 66V
32 Blue 65V
27 Red 70V
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Those are working voltages. You likely do have a loose connection.
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Thanks Paul; appreciate it buddy!
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Any ideas on what this could be? There's a chance that the input and/or output RCA's were unplugged by accident while the Seduction was on, but I really can't be sure.
Is this bad if you unplug the inputs and outputs while it is on? What will happen?
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It will stop playing music until you plug the cables back in.
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Hahaha, and here I thought it would produce catastrophic damage from the way I read it! Guilty as charged for unplugging RCA jacks while it's running. Now I can rest easy.