Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: jazzfan78 on March 31, 2015, 04:57:34 AM

Title: Problems after installing Speedball
Post by: jazzfan78 on March 31, 2015, 04:57:34 AM

well. i installed speedball and i still didnt do the voltage checks. but i notice not all the LEDS on speedball boards in working.
in the crack the LEDS in working fine. the problem is on the speedball boards.




pictures:

1) in the two A and B pc poabrs both left side leds dont glowing but right is fine


http://tinypic.com/view.php?pic=291jn7l&s=8#.VRq1qvmUdyw



2) in the Big main speedball board in the left side the 2 leds dont work but in the right side the 2 of them is ok.

http://tinypic.com/view.php?pic=xbh64j&s=8






what is the problem?

Title: Re: Problems after installing Speedball
Post by: jazzfan78 on March 31, 2015, 06:27:03 AM

i had this multimeter which i need to choose  DC
V---

or   V~

and which number?

pic:

http://i57.tinypic.com/o5dct4.jpg

Title: Re: Problems after installing Speedball
Post by: fullheadofnothing on March 31, 2015, 06:49:03 AM

The straight line is DC, the squiggly line is AC. m means milivolt. No letter means volts. Choose the next range higher than what you expect (i.e. if you're expecting 190V, use 200, if you're expecting 205V, choose 500, et cetera).

Title: Re: Problems after installing Speedball
Post by: Grainger49 on March 31, 2015, 06:49:53 AM

The only AC readings are the power supply up to the rectifiers for the high voltage and the heaters for both tubes.

Did the Crack work before the Speedball upgrade?  If so you need to give the voltages at the circuit boards (all DC) where the PCBs are attached to the circuit.

Title: Re: Problems after installing Speedball
Post by: Blkout on March 31, 2015, 09:06:06 AM

Pretty sure that the R2 resistors are wrong in this picture in the bottom right hand corner,  it's the two pair that were supposed to be twisted on one end and clipped. It looks like the R2 pair on the upper left hand side are correct, but the bottom right should be the same.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi57.tinypic.com%2Fxbh64j.jpg&hash=5b9291db71b74c5e0869a1af8db069c6bf26410e)

Title: Re: Problems after installing Speedball
Post by: jazzfan78 on April 20, 2015, 12:36:33 AM

i have serious problem. i try to measure. and my measures readings is really wrong. the crack worked without the speedball. now all the readings is a mess.
i upload here photos of the board in front and backwords if you guys can identify if something wrong. thnx!

A and B boards

http://oi58.tinypic.com/i4qt5u.jpg



big board

http://i62.tinypic.com/161ja1l.jpg


A board back

http://oi61.tinypic.com/217xvp.jpg

B board back

http://oi59.tinypic.com/2ihuq6r.jpg


Big board back

http://oi58.tinypic.com/5zmwqg.jpg

Title: Re: Problems after installing Speedball
Post by: Rocketman248 on April 20, 2015, 01:49:19 AM

You've got some pretty big solder blobs on there.  Look very closely to make sure nothing is shorted together.

Title: Re: Problems after installing Speedball
Post by: Paul Birkeland on April 20, 2015, 07:25:07 AM

You need to trim the leads on the back sides of the boards much closer to the board itself.  Look at the photos in the manual and do your best to imitate what's there.  (You also have an awful lot of solder on there, as mentioned before)

Title: Re: Problems after installing Speedball
Post by: Loggie on April 20, 2015, 08:27:28 AM

I noticed there are two different sets of resistors on the main PCB.
Do the smaller ones have the same value as the larger (brown) ones?
See attached picture (circled both sets red)

Also it looks as if the 2N2222 solderpoints almost touch eachother (but it could also be the angle of the picture that gives that impression).

Edit: Just noticed that Blkout also made the observation about the 2 different pairs of resistors!