TC Helicon Voicelive stomp box thing

[N_Cook]

Movement sensing to mode switching query. Very sensitive to vibration,
dropping into mixer setting away from voice mode without touching any pot or
control.
2006 , PbF but no mention anywhere, output level pot seemed to be the most
sensitive, logical as most used one. Solder yucky and partially-cracked
(that river ravine type appearance ) but not obviously failed joints at the
pins under x30 , but as pots, cannot sensibly do a tug test. Redid solder
on all pots and most of the heatsinky joints on that board and replaced vol
pot. No pots showed anything amiss monitoring wiper V or R and knocking.
Anyway much improved but a serious knock to the board, not the pots
themselves will trigger mixer mode. Setting any pot to half and paralleling
an insulated (not fingering as induced stray will trigger) R to it then 100K
// to half 10K will trigger MIX mode but not 390K // 5K so
trigger delta R is about 2 or 3 percent , is this normal , low? any sort of
standard for this pot-swiching action trigger level? Adding C at the pots
does not seem to be an option - latches up the sensing, unless a very
specific amount between 10n and 330nF , so far only tried

 

[Gareth Magennis]

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:id2qgq$o57$1@news.eternal-september.org...

Movement sensing to mode switching query. Very sensitive to vibration,
dropping into mixer setting away from voice mode without touching any pot
or
control.
2006 , PbF but no mention anywhere, output level pot seemed to be the most
sensitive, logical as most used one. Solder yucky and partially-cracked
(that river ravine type appearance ) but not obviously failed joints at
the
pins under x30 , but as pots, cannot sensibly do a tug test. Redid solder
on all pots and most of the heatsinky joints on that board and replaced
vol
pot. No pots showed anything amiss monitoring wiper V or R and knocking.
Anyway much improved but a serious knock to the board, not the pots
themselves will trigger mixer mode. Setting any pot to half and
paralleling
an insulated (not fingering as induced stray will trigger) R to it then
100K
// to half 10K will trigger MIX mode but not 390K // 5K so
trigger delta R is about 2 or 3 percent , is this normal , low? any sort
of
standard for this pot-swiching action trigger level? Adding C at the pots
does not seem to be an option - latches up the sensing, unless a very
specific amount between 10n and 330nF , so far only tried

When it switches to Edit mode, does it not tell you which parameter pot
change has triggered this?

Usually this is down to a worn pot which just needs replacing - the machine
tells you which one it is as the parameter name is highlighted in the
display.


Gareth.

 

[N_Cook]

Gareth Magennis <sound.service@btconnect.com> wrote in message
news:LfudnZL95aTwaGnRnZ2dnUVZ8iudnZ2d@bt.com...

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:id2qgq$o57$1@news.eternal-september.org...
Movement sensing to mode switching query. Very sensitive to vibration,
dropping into mixer setting away from voice mode without touching any
pot
or
control.
2006 , PbF but no mention anywhere, output level pot seemed to be the
most
sensitive, logical as most used one. Solder yucky and partially-cracked
(that river ravine type appearance ) but not obviously failed joints at
the
pins under x30 , but as pots, cannot sensibly do a tug test. Redid
solder
on all pots and most of the heatsinky joints on that board and replaced
vol
pot. No pots showed anything amiss monitoring wiper V or R and knocking.
Anyway much improved but a serious knock to the board, not the pots
themselves will trigger mixer mode. Setting any pot to half and
paralleling
an insulated (not fingering as induced stray will trigger) R to it then
100K
// to half 10K will trigger MIX mode but not 390K // 5K so
trigger delta R is about 2 or 3 percent , is this normal , low? any
sort
of
standard for this pot-swiching action trigger level? Adding C at the
pots
does not seem to be an option - latches up the sensing, unless a very
specific amount between 10n and 330nF , so far only tried






When it switches to Edit mode, does it not tell you which parameter pot
change has triggered this?

Usually this is down to a worn pot which just needs replacing - the
machine
tells you which one it is as the parameter name is highlighted in the
display.


Gareth.

Nothing flashes up, differentially, in the display but I suppose I should
have noted the readings as set before to notice a change - next time I come
across this sort of fault.
I've settled for sometime a heavy tap with a large screwdriver handle to the
edge of the pcb triggering mode change rather than most times a light tap
with a ballpoint barrel as being as it should be. Wrapped up for them for a
practise session this evening, will see if it bounces.