Back Panel Test; Tuning Flow Chart - Sequential Pro One Technical Manual

12, S w i t c h TO OSC B PW off, Switch TO FILTER t o DIR. The LFO should now
modulate t h e
filter cutoff frequency, giving
a
"wah-wah" effect.
13.
Switch LFO ROUTE
from DIRECT
t o WHEEL and repeat steps 8
-
12
except
switch
t h e destinations t o
WHEEL
(instead of DIR) to t e s t the WHEEL
desfinazon paths.
1-10
BACK P A E L TEST
,
1. If desired, connect e l e c t r i c piano, guitar,
or
microphone
to
AUDIO IN. Switch mode
to EXT. Raise MIX NOISE/EXT knob and
adjust
for
adequate
gating by t h e e x t e r n a l
signal.
2. With
a suitable
patch,
plug
one end
of a mono phone cable into 36
FJLT CV IN. This
should disable t h e
FILTER KEYBOARD
AMOUNT knob.
Connect other
end
to C V OUT,
Unit should play normally. Disconnect cable.
3. Plug one end of
mono
phone cable t o 5 2 CV IN. This should disable
the keyboard.
Connect
other
end
t o
CV OUT, Unit should play normally. Remove cable.
4.
If a GATE s o u r c e is avaitable
connect t o GATEjCLK IN, and switch MODE to
REPEATJEXT check t h a t
the
envelopes
are gated
and sequencer advanced with each
pulse.
5. GATE OUT can be checked with a voltmeter. The output goes
from
0 to +5V when a
key is pressed.
1-1 1 TONING FLOW CHART
Figure 1-9 on the
next
page is a flow
chart
for selectively checking
Pro-One
tuning.
Especially
because most
tuning trimmers are accessible
t o t h e
owner, whenever
t h e
Pro-One Is grossly out of tune it is probably
best t o completely
retune
according to
Section
5,
below or
in t h e t h e Operation Manual, CMIOOB. B u t often only a couple
of
trimmers
may
need "touching-up," i n which case following the chart may
save you
significant time,