HP 3320A Operating And Service Manual page 92

Model 3320A/B Section VII
SECTION VII
CIRCUIT DIAGRAMS
7-1. INTROOUCTION.
NOTE
7-2. This section of the manual contains troubleshooting
information and ciruit diagrams for the 3320AjB Auto-
matic Synthesizer. Included are troubleshooting trees,
functional block diagrams, schematic diagrams and com-
ponent location diagrams.
7·3.
TROUBLESHOOTING.
74. The following troubleshooting information is designed
to eliminate needless unrelated checks in locating instru-
ment malfunctions. It should first be determined that a
malfunction does exist and that it does not exist external to
the 3320AjB. Before troubleshooting the 3320AjB, be-
come familiar with the principles of operation (Section III)
and the functional composition (Section
IV)
of the
instrument.
7-5. To isolate the malfunction to an assembly, use the
Block Diagrams (Figures 7-5, 7-6, 7-7) and/or the trouble-
shooting trees (Figures 7-1 through 74). To further isolate
the malfunction to a component, use the schematic
diagrams (Figures 7-9 through 7-32).
Use the troubleshooting trees in the sequence in
which they appear in the manual with one
exception. The first rroub/eshooting tree. (Fig-
ure
7-1,
System Component Isolation and GPfB
Troubleshooting Tree) should
be
used for Op-
tion 007 (GPfB) 3320B instruments only. For
standard instruments start the troubleshooting
with Figure
7-2,
Reference Frequency Trouble-
shooting Tree.
7-6. SCHEMATIC OIAGRAMS.
7-7, The schematic diagrams (Figure 7-9 through Figure
7-32) contained in this section show the detailed circuits of
the 3320AjB. Components marked with an asterisk are
those that are critical in value. The value of these
components may vary from one instrument to another. The
optimum value is selected at the factory. All options
available with the 3320AjB are shown.
REFERENCE DESIGNATIONS
ASSElflLY
ASSEMBLY PART NUIIBER
NA!,E (INCLUOES AZA! SL8ASSEMBLY)
----
A2
ASSEMBLY
REFERENCE
DESIGNATION
~
JACK XAZ
IS
MOUNTED ON
CHASSIS OR ANOTHER ASSEMBLY'-r-.,
-\. ,.-vfJfr./t 'fsr~:[lgo~NRCS£a~Pt~r'rdisiG~kR
IS AZPI) I
~
z
~P'-' _-, I
' . ' I
R3
TEST
VOLTAG£~
I
PI IS NOT MOUNTED _ "
01
ON AZ ASSEMBLY :
I
+2..92V
't--_...:p-,,~/. )",2
2
(COMPLETE DESIGNATOR IS PI}
I
\:~
,
~
: I
R4~COMP1.CTE
DESIGNATOR /S AZR4
I
; ( ,I
i
SUBASSEMBLY OF AZ DENOTES S£EMAT/C
---*".'
'/'-'~,;'.' --...l."
"",COMPlETE DESIGNATOR IS AZAI) ON WHICH CONNECTION
~"
" I
ISMADE
-..i( ~
I
~NUMBER
INDICATES
AI
I
PIN OF XAZ AND PI
~MOTO-CHOPPER
05C-1
,lli, : •
I I . )
,g
;J
I
~
I
fRI
fR2
I
IfJ4LE
STAND~
r--FCMALE PIN
WIRE COLOR: COLOR CODE IS THE SAME
I
~
I
PIN CONNECTOR CONNECTOR ON
AS THE RESISTOR COLOR CODE. FIRST EYELET OR STAND- MAY OR MAY
~
A WHT/RED WIRE
NUMBER INDICATES BASE COLOR SECOND
I
OFF TERMINAL, MAY OR NOT 8E NUMBERED
otU- . .........
NlMBER INDENT/FIES W/DER STRIP, AND
I
MAY NOT BE NUMBERED
I
COMPLETE
I '"
~
THE THIRD INDICATES THE NARROWER /
AfY
IV'
DESIGNATOR
l'~
STRIP.
(~DENOTES
WHT/RED/YEL WIRE)
I .
@J
I
IS AZAIRI
I
~
PARTIAL REFERENCE DESIGNATIONS ARE SHOWN: PREFIX WITH ASSEMBLY OR SUBASSEMBLY
DESIGNATIOMSI OR BOTH FOR COMPLETE DESIGNATION
STo·e·2192
7-1