Troubleshooting; Block Diagram - Roland Acoustic Chorus AC-33 Owner's Manual

Troubleshooting

If the system does not work as you expect, check the following points first.
Symptom
Power will not turn on
No sound
Sound is distorted
Insufficient volume
Effect not applied

Block Diagram

GUITAR CHANNEL
GUITAR INPUT
VOLUME
MIC/LINE CHANNEL
MIC/LINE INPUT
VOLUME
AUX IN AUX
L/R
LEVEL
AUX
(STEREO)
14
Cause
Power will not turn on: Are the AC adaptor and AC cord connected correctly?
Is the AC cord correctly connected to an AC outlet?
Are the batteries installed correctly?
Could the batteries have run low?
Is the external equipment connected correctly?
If headphones are connected, no sound will be output from the speakers.
Are each channel's level knob and the [VOLUME] knob adjusted correctly?
Is the AUX IN [LEVEL] knob adjusted correctly?
Could the batteries have run low?
The POWER indicator will dim when the batteries run low. If the batteries run even lower, the POWER indicator will blink.
Please install fresh batteries.
Could each channel's level knob or [VOLUME] knob be raised excessively?
Is the input level from the connected device appropriate?
Are each channel's level knob or [VOLUME] knob adjusted correctly?
Is the input level from the connected device appropriate?
Could multiple devices be connected to AUX IN jack?
Could the batteries have run low?
The POWER indicator will dim when the batteries run low. If the batteries run even lower, the POWER indicator will blink.
Please install fresh batteries.
Could the [CHORUS] switch be turned off?
Is the [REVERB/AMBIENCE] knob adjusted correctly?
Could you have used a foot switch to turn off the effect?
The effect cannot be applied to AUX IN.
STEREO EFFECT
BASS MIDDLE TREBLE
CHORUS
REVERB/AMBIENCE
BASS TREBLE
ANTI
LOOPER
FEEDBACK
VOLUME
REC/PLAY/OVERDUB
STOP/CLEAR
CHORUS ON/OFF
REVERB/AMBIENCE ON/OFF
L
MUTE
R
POWER AMP
PHONES
(STEREO)
LINE OUT
L/R
FOOT SW
LOOPER
FOOT SW
EFFECTS
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SPEAKER L
SPEAKER R