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May 20, 2019, 11:37:10 am

Author Topic: seduction pre amp quit working  (Read 1188 times)

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Offline leland

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seduction pre amp quit working
« on: September 08, 2015, 09:04:05 am »
my seduction quit working and I can't find my cd to test this can anyone help with this

Offline galyons

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  • Geary Lyons SF East Bay Area
Re: seduction pre amp quit working
« Reply #1 on: September 08, 2015, 09:16:37 am »
Hello,
You will need to be more definitive as to the problem then "quit working".  What is not working? Is it plugged in, fuse blown, getting power to the transformer?  Are the tube filaments lighting? 

Get out your DMM and run the voltage checks:

Seduction Voltage Checks
Terminal          Voltage         
6                6.5VDC         
7                0VDC         
9                6.0VDC         
10                0VDC         
11               0VDC         
12              135VDC         
14                0VDC         
15                148VDC         
16                0VDC         
20                0VDC         
25                160VDC         
26,36             0VDC         
27,37           70VDC         
28,38            0VDC         
29 ,39             70VDC         
30 ,40            70VDC       
34,44             135VDC         
35 ,45             0VDC         
A1,B1            70VDC         
A2,B2             0VDC         
A3,B3             1.6VDC         
A4,B4             0VDC         
A5,B5             6.0VDC         
A6,B6                  70VDC         
A7,B7                 0VDC         
A8,B8                1.6VDC         
A9,B9               0VDC         


Let us know the results.

Cheers,
Geary
VPI TNT IV/JMW12.7i/FR1 MkII Soundsmith retip >Eros TH+ Otari MX5050 IIIB2 > Eros + ANK Dac2.1 > BeePre >Paramount 300B 7N7 > EV Sentry IV-A

Crack 7N7 > Sennheiser HD650 & AKG K240 Sextetts

Thorens TD124/Ortofon RMG-212/SPU >Seduction > Smash^Up> Paramour 45 MQ >K12's

Offline leland

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Re: seduction pre amp quit working
« Reply #2 on: September 08, 2015, 11:24:00 am »
terminal      voltage
6                   9.4
7                    0
9                   5.46
10                  0
11                  0
12                 178
14                  0
15                 177
16                   0
20                   0
25                  178
26,36             these two bounce all over the place and the L.E.D.'s come on when i check here
27,37   starts high then goes down to 73.1 when LED's come on ,178 led's dont come on when i check here
28,38               0
29,39            177
30,40             bounces around a lot 70 and up
34,44             178
35,45               0
a1,b1              68.6, bounces around 90's up to low 100's one led blinks
a2,b2            .03, bounces around 1
a3,b3             1.49
a4,b4             9.6,9.61   led's have gone out at this point
a5,b5             10.4
a6,b6              178
a7,b7              0
a8,b8              .003,.007
a9,b9              0

at this point nothing seams to turn the leds back on

Offline Paul Birkeland

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Re: seduction pre amp quit working
« Reply #3 on: September 08, 2015, 12:18:06 pm »
26,36             these two bounce all over the place and the L.E.D.'s come on when i check here
You have a flaky solder joint making an intermittent connection.

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline leland

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Re: seduction pre amp quit working
« Reply #4 on: September 08, 2015, 03:02:58 pm »
I can no longer get the leds to light any suggestions as to whare to start looking for this bad solder i dont have a schematic for this

Offline Doc B.

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Re: seduction pre amp quit working
« Reply #5 on: September 08, 2015, 03:32:05 pm »
Just reflow every joint. It will take all of ten minutes.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.