6
8. Does the audio sound right (with the DEPTH knob fully counter clockwise)? If not...
A. Does it sound very muffled or overly bright?
I. Is the HARMONIC MIX knob centered (at 12:00)?
II. Are you able to adjust the HIGH and LOW trim pots (by ear, after calibration) until the
audio sounds good to you?
III. Are both the HPF and LPF signal paths working?
•
Put the Quaverato in calibration mode (hold down both foot switches upon power
up) and test to see if both the high and low frequency paths are working (by using
the HARMONIC MIX knob). See page 11 in the Quaverato User’s Manual for more
information about calibration mode.
•
If either one of the signal paths aren’t working see APENDIX A: IF ONE OF THE 2 SIDES
IS NOT WORKING (EITHER HIGH OR LOW)
B. Does the pedal sound distorted?
I. Often times when an audio signal is distorted it is caused by a bad connection within the
circuit...In this case solder joints that don’t make a good connection will cause the signal
to sound distorted. This type of distortion sounds very knarly and is usually dependent on
how hard or loud you play your guitar. Often times the signal is very low until you hit your
guitar strings hard and then the signal punches through in a distorted burst. Most of the
time bumping or hitting the pedal against something can help you know if the distortion is
caused by a bad solder joint. If the distortion improves or if the signal is lost all together,
this is a good sign that there is a bad connection somewhere on the board. Re-flow ALL
the solder joints on the pedal, particularly in the analog section. If there is one bad solder
joint it usually means there are more. Practice good soldering technique!
II. Is the isolation paper under the pots? Make sure there are not holes in it and nothing is
able to poke through to short out against the pots. This could cause either no signal to get
through, or a distorted signal.
III. Are the trim pots set properly? Depending on the type of distortion you hear, you may
need to back off the GAIN trim pot from the suggested setting in the assembly manual if it
is set too high. Remember to back off the GAIN turn the trim pot clockwise (opposite from
the HIGH and LOW trim pots). ...And/or you may need to back off the HIGH and LOW
trim pots so the final gain stage is not over-driven.
IV. Are the voltages of U2 correct? See the APENDIX B: U2 VOLTAGES section.
V. Is the relay silencing circuit working correctly?
•
Check for 5V on R28 (see PCB voltage graphic)
Summary of Contents for QUAK
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