Help with BeePre

[Lee Hankins]

Need Help with my BeePre, could someone head me in the right direction.  This is the first Bottlehead Product that did not work right from the start,  my Chemo Brain has not been able to trouble shoot the problem.

        Tested Voltage(DC)   Voltage (DC)

Terminal 6 -      145.3      146 +/- 1%
Terminal 11 -     0            146 +/- 1%
Terminal 10 -    190.5      186
Terminal 15 -    233.6      186
Terminal 40 -    236         213
Terminal 43 -    235         213

A3 -       91.3                  90-110
B3 -      0                        90-110
C3 -      6.86                   3.5-4.5V
D3 -       .786                  3.5-4.5V
C7 -      145.3                147V
D7 -      -.013                 147V
C9 -      145.1                147V
D9 -      -.013                 147V

Only one LED lights up, I have changed out several LED's with negative results, I do get voltage across all LED's.

Resistance Readings are OK.

Cordially,
Lee Hankins

[Paul Birkeland]

LED's may not be the place to look, as you have no high voltage getting through to the B side.  (All the LED's should be lighting on the A side).

I would start by double checking the connection of the white wire at terminal 15, it should feed IA on the B side C4S board. With the amp off, also check for continuity between OA,  T11,  and + reg on the back filament regulator PCB.

-PB

[Lee Hankins]

Sorry for the delay.  No LED's are lit on the A side, and only one LED is lit on the B side.  The connection of the white wire @ terminal 15 to IA on the B side C4S board is OK, and there is continuity between 0A and T11.

[Doc B.]

OK, off the top of my head. Voltage comes into a C4S at IA. You have voltage at T1 and B side IA. So we have voltage to the C4S board. Next that voltage goes thru the B side IA pad to the R1 current set resistor and the LED string. So the open in the circuit kinda sounds like it might be right at the B side IA pad.

[Paul Birkeland]

I would also be double checking the jumpers on the C4S boards, just to be sure they are where they are supposed to be.

[Lee Hankins]

It was the LED's on the A side, it now is OK.  I had previously only changed LED's on the B side.  There is one LED still lit on the B side, changed its partner but no new lites.  Will fool around with the B side later tonight.  Thank you for the help so far!!!