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8.5 Defeating the COMPELLOR (All Models) Peak
Limiter
When the COMPELLOR is used with the PROCESS BALANCE Control
mostly or completely set toward leveling, there are times when peak limiting
occurs more often because the compression circuit no longer manages short-
term dynamics. In some applications, such as speech processing, the peak
limiting may produce an audible crack or slight click. You can verify this
action by noting if the sound occurs at the same time as the " LMT" LED
flashes. Disabling the peak limiter circuit will prevent this occurrence.
The following procedure non-destructively disables the peak limiter so it
may be restored at a later time:
1.
With power off, remove the top cover.
2.
Locate the integrated circuit designated U102 (see Fig. 8-2 on page 8-3)
on the right-hand side of the ( lower) Audio Board(s). This board is ac-
cessible without removing the ( top) Display Board.
PIN 1
U102
'-.BEND OUT
..---- PINS 6 & 7
Fig. 8-6. An illustration
showing what pins 6 & 7
should look like once the
modification has been
completed.
3.
Carefully remove U102 from its socket. Bend out pins 6 and 7 so they
will not contact the socket when replaced, as shown in Fig. 8-6.
4.
Insert the integrated circuit back into the socket, making sure that pins 1
to 5 are properly seated.
5.
Replace the cover and restore power. As a suggestion, write down on a
label the date and that the Peak Limiter is defeated. Post it on the
COMPELLOR's front or back panel to inform all users of your modifica-
tion.
8-8 Circuit Modifications
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