HP 654A - Section VII: Circuit Diagrams; 7-1. Introduction; 7-2. This section contains circuit diagrams; 7-4. An explanation of terms and symbols

Model 654A
Section VII
SECTION VII
CIRCUIT DIAGRAMS
7-1. INTRODUCTION .
7-2. This section contains circuit diagrams to aid in the
operation and maintenance of the Model 654A. Figure 7-1
is a functional circuit diagram which shows the overall
relationship between the basic circuits of the instrument.
Figures 7-2 through 7-5 contain the detailed schematic
diagrams as well as component location drawings of each
printed circuit board and the rotary switches.
7-3. General schematic notes, which apply to all the
schematic diagrams, are listed on Page 7-2.
7-4. An explanation of terms and symbols used on the
schematic diagrams is given below.
REFERENCE DESIGNATIONS
ASSEMBLY ASSEMBLY
REFERENCE ASSEMBLY PART NUMBER
DESIGNATION NAME ( INCLUDES 4241 SUBASSEMBLY)
JACK XA2 IS MOUNTED ON
CHASSIS OR ANOTHER ASSEMBLY \,
.*\
2
PI IS NOT MOUNTED
ON 42 ASSEMBLY
(COMPLETE DESIGNATOR IS PI)
4
1
... kNUMBER INDICATES
PIN OF XA2 AND PI
42
POWER SUPPLY 100XXX - 66 501)
PLUG PI IS MOUNTED ON ASSEMBLY OR IS PART
.. {V . OF THE ASSEMBLY BOARD ( COMPLETE DESIGNATOR IS A2PI)
R3
TEST VOLTAGE
A ,..--e-COMPLETE DESIGNATOR IS A2R4
4
,924, I 8
4.l
WIRE COLOR: COLOR CODE IS THE SAME I ' s.k
/
AS THE RESISTOR COLOR CODE. FIRST EYELET OR STAND—
NUMBER INDICATES BASE COLOR, SECOND I OFF TERMINAL, MAY OR
NUMBER INDENTIFIES WIDER STRIP, AND i MAY NOT BE NUMBERED
THE THIRD INDICATES THE NARROWER
r e/
Al
F HOTO-CHOPPER OSC
STRIP. ( 924, DENOTES WHT/RED/YEL WIRE) I
+2.92V
SUBASSEMBLY OF A2
(COMPLETE DESIGNATOR IS A2AI)
RI
COMPLETE
DESIGNATOR
IS 42AIRI
PI
3
DENOTES SIGNAL
CONNECTION
XA2 2
1 ç
DENOTES SCHEMATIC
ON WHICH CONNECTION
IS MADE
1
I 92
R2 MALE STANDOFF 1 \- FEMALE PIN
PIN CONNECTOR CONNECTOR ON
MAY OR MAY A WHT/RED WIRE
Nor BE NUMBERED
Nt" 1/4 t1
/ a
s""
PARTIAL REFERENCE DESIGNATIONS ARE SHOWN: PREFIX WITH ASSEMBLY OR SUBASSEMBLY
DESIGNATION(S) OR BOTH FOR COMPLETE DESIGNATION
SIS- B-2192
7-1