HP 203A - Page 27

Section
V
Model
203A
Paragraph
30
Figure 5-6 and Table 5-5
%2ОЗА
VARIABLE PHASE
FUNCTION GENERATOR
AC VOLTMETER
94038
— 476000) UV2W 1% (2)
%0727-008!
203A—M-IGÀ
Figure 5-6. Phase Lag Dial Adjustment
9-30.
Observe
the
following
rules
when
repairing
c.
To
remove
a
damaged
component,
clip
com-
double-sided
etched
circuit
boards.
ponent
leads
near
the
component;
then
apply
heat
and
remove
each
lead
with
a
straight
upward
motion.
a.
Solder
from
the
conductor
side
of
the
etched
d.
Useaspeciaitoo!
to
remove
components
having
circuit
board.
multiple
connections,
such
as
potentiometers,
etc.
Refer
to
table
5-1
for
type
of
soldering
tip
required.
b.
Avoid
applying
excessive
heat
when
soldering
e.
Use
a
toothpick
to
free
hole
of
solder
before
on
the
circuit
board.
installing
a
new
component.
Table 5-5. Purpose of Factory Selected Values
То provide proper range for A2C1. (Adjust only if А25, А201 or A2Q2 are
changed.)
A2C2*
A2CT*
To provide proper amplitude for 09 A25 drive.
To provide proper amplitude for 909 A25 drive. (Adjust only if A25, A2Q1
or À2Q2 are changed.)
(Adjust only if A25, A2Q1 or
А2С11*
A2Q2 are changed. }
To eliminate H. Е. oscillations on the -24. 5 volt de supply.
5-10
01760-3