Philips PM2521 Service Manual page 105

115
7.
MODIFICATIONS TO THE
PM2521
This service
manual
is
based
on the instrument
numbers
DM
01
1145
and onwards. For instruments with
a
lower
number the following modifications are given.
7.1.
Modifications to circuit
diagrams
and
p.c.b.
lay-out
The following diagrams
must
be used:
ACTIVE
FILTER
!
I
Fig.
65.
Modifications to active
fiiter