HP 740B Operating And Service Manual page 98

Model 740B
Section VII
-------------
RI6
470
--l
~=============DIFFERENTIAL
= = = = = = = = = = = = = = =
lr
AMPLIFIER
FROM A6-21
+IOV
~
_ _ _ _ _ 4
I
A4-
JhP
PART NO. - -
00740-66524
I
1r.::.================OPERATIONAL
I
V
FILTER
=======I========~
1408- 0- 0734A
NC
I
I
I
TOAS-20
+--------...
- - 4
3
>-ig·:~.6Z';~~~~~VPUT
I
VOLTAGE AND CURRENT!
I
R28
270
R29
820
R27
47K
+IOV
R32 R33
220 6800
R31
011 C8
10K +8.4
0.
0033
1
+4.5
010
+4
+4.5
R34
0
3300
+IOV
R30
2200
- - - - - - - 1 - 7 - - - - - -
L
FROMAS-16
- OUTPUT
FROM RANGE DIVIDER, SI
HIGH VOLTAGE SECTION FEED8ACK
o
TO +IV
R25
6800
R26
IK
1 100MV 1 3
OD
0
~
0
C@QD
0
IIOOOV 1
0
CRIO
-IOV
R24
47K
-O.S 08 +10
R23
10M
CR8
CR7
CR9 CR6
CR4
CRS
--------8 ------
R20
18K
RI9
220K
CIO
0.01
RI8
22K
-6.8V
-6.8V
C4
10
R21
22M
+O.S
RII
3900
....
+6.8V
INT
RI2 ZERO 07 +10
1-
-t0"--1..........
6V180fv.K_~RIW
, . _ . . , .,.._ _. , . . . .
~~
SDK 0
+6.BV
~O
I
FUNCTION
I
IFUNCTIONI
~
SIR20
~
DE:]
.SOI.G.:..(FO)E!'"'---_~-'Ii';;,0~e---------------L-.12~S~II~(R;.;)
c::YD
~
SIE(R)
~ o+-oI,,"I_-<~--===!.;'7;. ~
0
~O ~ ~3
'-----===~17.,
0
CillJ
~
3
CillJ
~
3
IIOOMV
I
0
'-==~--t-'====~o
BETWEEN POSITIONS
~O
10)
R9
2.7M
RIO
470
R7
lOOK
R8
3.9M
01
r
-------6 -------
22 - - - - -
-IOV
Y
F R O M - - -
A6
-18~ERi;,tI'/J~~E;@\
610-00376 .... ....
AN.D
ABOV~{
I RANGE 1
o:=J~A(F)
R6
50K
NC
BAL ADJ
~
R3
4.7M
R22
56K -1.0
OV±IOOP.V
TPII
CRII
'------------------t-------i-----------------------------+-
~~--l-----------J
CRI2
R4
4.7M
VM
1 V
Shorted
TPI2
NOTES: FIGURE 7-8
OV±3MV
FUNCTION:
RANGE:
INPUT:
COPYRIGHT 1966 BY HEWLETT - PACKARD COMPANY
I. VOLTAGES INDICATED IN RED ARE MEASURED WITH FRONT PANEL
CONTROLS SET AS FOLWWS:
2. VOLTAGES ARE REFERENCED TO
W.
FIGURE 7·3 (Top and Bottom
VIew) SHOWS THE GROUND POINT LOCATION.
I
I
FROM AS-15 I
CURRENT
~20~--_~--~
LIMIT 81AS
I
I
R35
I lOOK
L-~8~
_
6~~~D
AI7 RI R2
o
TO -IOMV - ( 2 1
""6"'8NK~r_"'2\/1M-+_----
...- ....
~0~
(ALL RANGES
I "-
AND FUNCTIONS)
22
A4
"p
PART NO. 00740 - 66524
~C
-R32-
J
-CR4-
I
cit]
~
f)
$ \Y~
-CR5- TPI2 TPII
E
-R24- -CR6- R6 RI3 -R4-
-R23- ~ -R3-
~
-CRIO-
I
-CR9- Co
\Y.f
-R29- -CRS- -R5-: 03 -C2-
E
-R2S-
012- CR7 -
-R20- -CI- -RI-
OlO f \ C4 -R22-
fl\~
-R31- E\c7'B
I
-R21- -CRI- BO
OI
aG
B
\...VE
-CRI2- -R2- C
E
(]c
-R27- -CRII-
It)
RI9
u - -
-RI2- 02 E
09 -R26- -R35-
I
-RII- ()B
fl\B -R25- -RIO- C7 -C3-
i
\...Vi
-R33- -CR3-
I
L...--"r--...J_
RIS _ -RS- 04QB
EC
-R34- -CR2- ID -R9-
( ]
OIIB -R30- -RI6- u -R7-
EJ.
C
I
-RI5- -RI7- 05 E B
E -CS- -CIO- -RI4-
74OB-0746A
Figure 7-8. Operational Filter and Differential
Amplifier (A4) Schematic and Com-
ponent Location Diagram
01794-1
7-17/7-18