3) Advance Oscillator Volume, Filter Cut Off and
Output level controls to midrange.
4) Turn the left hand Modulation control slowly
up and down. A tone of changing frequency
should be heard.
5) Vary the left hand Modulation control and the
VCF cut-off frequency. Notice the differences
in pitch and timbre.
6) Advance the right hand Modulation control. The
oscillator is now being modulated by the LFO.
7) Advance the LFO frequency control and experi-
ment with the LFO switch settings.
8) Turn the right hand Modulation knob off (to
the left). Move the switch below the Frequen-
cy cut off knob to the AD/LFO position. The
filter is now being controlled by the LFO.
Vary the LFO knob, the left hand Modulation
knob and the Filter knob to make different
sounds
(9) Set both the Attack and Decay knobs to the
9 o'clock position. Move the Filter select
switches to the AD position. Press the Trigger
button firmly and release. The filter is now
being controlled by the AD generator. Change
the Attack/Decay settings. Move the Sustain
and Repeat switches.
(10) Turn the VCO volume off. Turn the Noise vol-
ume fully on. Set the Filter select switch
back to Manual. Vary the cut off frequency
knob. The sound of wind should be heard.
TROUBLESHOOTING
(1) Are both the WP-20 and the amplifier turned on
Are the batteries in the WP-20 fresh?
(2) Is the WP-20 correctly connected to the AUX.
input of your amplifier?
(3) Check for proper parts placement on the PC
Board. Check for proper wiring between con-
trols and board. Check for bad solder connec-
tions and shorts between copper traces on the
PC Board.
(4) Replace IC3 with one that is known to be good.
(5) Replace Q4 with one that is known to be good.
SPECIFIC PROBLEMS
No sound from oscillator
See 4 and 5 above.
No noise
Is Q1 oriented correctly?
Change Q1.
LFO not working
Change IC4.
Filter not working
Change Q3.
Change IC2.
VCA not working
Change Q2
Change IC2.
AD Generator not working -
Change IC1.
Change Dl and D2
|
