Boss Me 25 guitar processor given 8Khz noise

Sam_sky

Sep 24, 2015
8
Joined
Sep 24, 2015
Messages
8
Need some help on this.. on how to cut the noise please

The Output from My Boss Me-25 guitar processor seems to send a high pitch sound around 8 Khz.. tried the following

1. Changed the power supply to different adaptor
2. Used only battery
3. Bypassed to the tuner mode (no effects etc.,)
4. Changed cables 
5. used wireless guitar system
 
Since the issue prevails..
 
- I tried the low pass filter circuit with TL071 but did not work.. ( not sure if I created correctly).
used tripod for resistor.
 
see below for scans
 
2

 
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