HP 740B Operating And Service Manual page 96

Model 740B Section VII
J4
MI
VM
I V
Xl
Shorted
NOTES: FIGURE 7-6
FUNCTION:
RANGE:
SENSITIVITY:
INPUT:
S2R4
202.5
2. YOLTAGESANDWAVESHAPESARE REFERENCED TOW . FIGURE 7-3
(Top and Bottom View) SHOWS THE GROUND POINT LOCATION.
1. VOLTAGES INDICATED IN RED ARE MEASURED WlTH FRONT PANEL CON-
TROLS SET AS FOLLOWS:
S2RI
202.5K
CI3
I
METER LOOP
F'======FEEDBACK DIVIDER======~
S2R2 S2R3
20.25K 2025
+ CI2
3.3
R32
lOOK
R33
10K
METER AMPLIFIER OUTPUT
o
TO 1: IV DC
DIRECTLY PROPORTIONAL
TO METER DEFLECTION
...--..----4_--..
--~
12)--+-----------....:·;..-------------...
---+--!-+--+--\.;..--~_n\
010
R25 R26
6BK 2200
CR3
CR4
QV
+IOV
09
+
.1
R23
22K
R24
10K
OB
R21
1.2M
~-- --~
r ; = = = = = = = = = = = METER DRIVER==========~
C9
R22
l~:' 2.7M
R20
220
06
RI7 R19*
6BK 6BK
OV
10
V4
C5
I
. . . . . . . .
_ ~IIN'v-~
. . . . . .
~ ~
B
>-~e- ..... ~"""""-:)""',,,,,(
C7
I
/
+
-0.25
FROM A6-21
+IOV
---,}----
C4
0.02
RB
22K
V3 RI8
\:~-~
6BOO
R4 R9 RIO RII RI2 RI3 C6 I R27 R2B R29 R30
82 1M 56K 10K 10M 2200 0.47
+ C8
2.7M 22K
6BK
2200
L __ '
--~ 3.3
Cl5
0.02
R6
220K
R3
B.2M
RI
200K
RI4
IBK
R7
160K
R5
1M
hp PART NO. -
.00740-66522
: - - - - - ' [ ; = = = = = = = = = = = = = AC AMPLIFIER ==-=-=+::==========::;1
V2
I
I
l - __
o
TO 1: IV (VM) R6
~R~M
+/v (STD
a
LlVM) lOOK
SIR7
METER
P=FILTER~
1
12V
j
1
1
50MV
1
SATURATION (Iv INPUT, IV RANGE, XI0 2 SENSITIVITY
VM OR LlVM)
IV
j
XI02, XI0 3 AND XI0 4 SENSITIVITY, VM AND LlVM, ALL RANGES
CON-SCALE METER DEFLECTION)
XI AND XIO SENSITIVITY, VM AND I'NM, ALL RANGES
CON-SCALE METER DEFLECTION)
A2TPS,*
740B-RO
IP/OAIO
J
--,
R5
I
22M
*R2 +IOV
R3
560 1740
S2R5 METER
22.75
100f'V
ZAEDRJO RIO
ADJ
RI2
~ 1M ? 2 5 0
-IOV
--~
0+0
I
~
I
I
---~
+
CII
3.3
R31
2.7M
CR2
+ ,
~
+
,
...
+
I
...
---y---
6 - - -
-IOV
FROM A6-IB
0 + 0
I
...
0 + 0
,
.....
R2
2400
L _
t METER AMPLIFIER
FEEDBACK
o TO 1: IV(VM)
o
TO +IVCSTD)
I FUNCTIONI
SII(R)
[YMJ
740B-J-0732A ' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 o - - - - o ; 5 = = ,
ILlVMI ....
~+------------------------------
. . . .
22
-R30-
cEQ -R29-
-C9-
~
-CR4-
-CIO- -R2B-
-R20-
~@O
-R26-
B -CR3-
-R21- E -R25-
-R22- B Q
-CI2~~
-R23-
-R32- -R24-
-R33- E@B -RIB-
-R31- c -RI9-
-CII~@LCB-
-R27- c -CR2-
-RI7-E@B
c
A2
hp
PART NO. 00740-66522
-CI5- E -R9-
-R3- C@ -RB-
-R4- B -CI5-
-C2- ... 7 Q'2I-C3-
-R2- I}eI -R6-
-RI- E@-R5-
c 01
-CI-B -R7-
-CRI-
-RI2-
is -RI6-G>TPB
-RII-
-C7-
-C5-
@
-RI5-
-RI3-
ECB -RI4-
-C6-
~
-RIO- ECB
740B-0744A
COPYRIGHT 1966 BY HEWLETT-PACKARD COMPANY
9
01794-1
Figure 7-6. Meter Amplifier (p/o A2) Schematic
and Component Location Diagram
7-13/7-14