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Model209A
Section VII
SECTION VII
CIRCUIT DIAGRAMS
7-1. INTRODUCTION.
7-2. This section contains the circuit diagrams
necessary for the maintenance of the Model 209A
Sine / Square Oscillator. Included are schematic
diagrams and component location diagrams.
7-3. SCHEMATIC DIAGRAMS.
74. The circuits contained within each assembly are
shown in the schematic diagrams. These diagrams can
REFERENCE
be used to develop an understanding of the principles
of operation and as an aid to troubleshooting.
7-5. COMPONENT LOCATION DIAGRAMS.
7-6. The component location diagrams show the
physical location of each part mounted on an
assembly. Each part is identified by the reference
designator used on the schematic diagrams and in the
replaceable parts list.
DESIGNATIONS
PARTIAL REFERENCE DESIGNATIONS ARE SHOWN:
PREFIX WITH
ASSEMBLY OR SUBASSEMBLY DESIGNATION(S) OR BOTH FOR
COMPLETE DESIGNATION.
ASSEMBLY
A2
A2
NONE
SUBASSEMBLY
NONE
A1
NONE
COMPONENT
Q1
R1
J1
COMPLETE
DESIGNATION
A2Q1
A2A1 R1
J1
STO-A-IIOOA
AJJembly
Reference
AJJembly
AJJembly Part Number
Designation
Name
(i"cludes A2AI subassembly)
, - - - - - " - - . ,
~
III
not mounted on
•
,
AJJembly A2
I
A2 ,
",w,"
~;;;;;:;;;;.;,;IOH"-';;;'~
Connector XA2 mounted on
I
J
I
Chams or ",lOther
,1JJembly~
I
~
XA2
I
,........L-(
~
2
I
rh~'
Destmatton of w"e
I
I
connector XA
3
:
QI
(Assembly A3). Pm
4
I
I
6
XA2
XA3-4
Number mdlCates pm of
I
I
I
connector XA2 ~
I
----l:{3~__+----l ~SubaJJemblY
of A2
:
I
AI
!PHOTO-CHOPPER OSCILLATOR
I
~~
I
Wire Color:
Color code lame aJ resistor
I \
I
c%r code. First number indicate! bale
I
color, second number
indentifi~J
wider strip,
I
I
third
number
indicates
narrower
Jtrip.
Eyelet or standoff terminal
I
E.g.
~
denotes WHT-RED-YEL wire.
mayor may not be "umbered
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7-1
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