help debugging newbie TS-808

Started by jlullo, November 12, 2006, 09:47:34 PM

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jlullo

hey guys... i made a post earlier on tonight about my battery heating up.  I was able to put the battery back in and get all of the info i needed to debug, but by the time i finished taking measurements it had started to heat up again.  Can you guys please help me figure this out?

TS-808  from tonepad.com
http://www.tonepad.com/getFileInfo.asp?id=81
I followed the layout exactly, and built for asymmetrical clipping.  When I was done with the board, I wired the pedal for millennium bypass as found on tonepad's website.  I mounted the resistor for the LED on a blank space on the board.  There were no parts substitutions or modifications.

When I turn it on, the LED flickers when I hit the switch, but never turns on.  There is no sound when the pedal is on or bypassed at all.

1.   out of circuit battery voltage – 0.01

Q1
1 - 0.26
2 - 0.81
3 - 1.66

Q2
1 -  1.03
2 – 1.66
3 – 1.66

IC
P1 - 1.11
P2 - 1.10
P3 - 0.93
P4 - 0.00
P5 - 1.12
P6 - 8.19
P7 - 2.51
P8 - 1.65

D1
A - 0.04
K - 0.02

D2
A - 1.10
K - 0.00

D3
A - 0.01
K - 0.01

petemoore

Quote from: jlullo on November 12, 2006, 09:47:34 PM
hey guys... i made a post earlier on tonight about my battery heating up.  I was able to put the battery back in and get all of the info i needed to debug, but by the time i finished taking measurements it had started to heat up again.  Can you guys please help me figure this out?
  First thing I do is test that NON continuity between the battery clip -/+ isn't happening, sometimes clipping the DMM on Beep to the Bclip buttons While moving stuff, like the circuit into the box.

TS-808  from tonepad.com
http://www.tonepad.com/getFileInfo.asp?id=81
I followed the layout exactly, and built for asymmetrical clipping.  When I was done with the board, I wired the pedal for millennium bypass as found on tonepad's website.  I mounted the resistor for the LED on a blank space on the board.  There were no parts substitutions or modifications.

When I turn it on, the LED flickers when I hit the switch, but never turns on. This is probably the shorting.
    There is no sound when the pedal is on or bypassed at all.

  This is certainly caused by a bypass sw or jack miswire.
 

1.   out of circuit battery voltage – 0.01
  The circuit will not bias at this voltage, a fresh battery is needed, test for shorts before connecting the battery.

Q1
1 - 0.26
2 - 0.81
3 - 1.66

Q2
1 -  1.03
2 – 1.66
3 – 1.66
  '1 '2' and '3' represent CBE, but I don't know whichswhich, use C, B, and E to indicate collector base and emitter
IC
P1 - 1.11
P2 - 1.10
P3 - 0.93
P4 - 0.00
P5 - 1.12
P6 - 8.19
P7 - 2.51
P8 - 1.65

D1
A - 0.04
K - 0.02

D2
A - 1.10
K - 0.00

D3
A - 0.01
K - 0.01

You will need a new battery to test voltages, first get the shorts figured out.
Convention creates following, following creates convention.

jlullo

#2
how do i test for shorts?  also, how do i test for non continuity between on the battery clip?

sorry, i'm feeling a bit overwhelmed

petemoore

  Look in the DMM manual for diode checking, or continuity checking, maybe your DMM's l ike mine...look for a ---->l---- symbol on the meter dial, set it there, touch the leads together and hear a beep...when connected directly or through some other material, a beep will sound, this means resistance is extremely low...enough that you can figure it as a 'connection.
  You want NoN connection at battery clip +/- poles.
Convention creates following, following creates convention.

jlullo

i will check that first thing tomorrow, as soon as i return this DMM and get a new one :) i just got it tonight and it's instruction manual doesn't have any info on how to use it, and i can't find any info on it online.  It also doesn't have the beep function!