BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 8.34
8.16. BUZZER TONE
This operation is the same for all machines.
Figure 8.16-1
This operation should be carried out
only if the trimmer P2 has been moved
accidentally.
1. Leave the power cord connected to the power
entry.
1. Remove the EPROM
a
from the CPU Board
using a special integrated circuit extractor.
2. Switch the machine on: the buzzer will sound
continuously.
3. Turn the trimmer screw
P2
using a small flat
screwdriver to adjust the tone, until the
frequency of the signal between pins 4 and 6
of integrated circuit U4, read with an
oscilloscope, is 3.9 KHz.
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