HP 740B Operating And Service Manual page 101

7-23/7-24
Section VII
01
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POWER SWITCH
==:;;j
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~
T4
"
Figure 7-11. Power Switch Driver, Internal Cur-
rent Limit and Unguarded Power
Supply (A 7) Schematic and Component
Location Diagram
I
I
F3
I
2A
~
7
INTERNAL
I
V
CURRENT LIMIT ~ I
RI3 I
10K
I
RI4
-42
IK ~
10
I
R4
\E..J
0.S49
9
RI2 C6 RII RI6
470 0.01 10K 22K -42V
+ISV
Model 740B
01794-1
POWER SWITCH
V
DISCHARGE
~
+16V
02 +16
+1.1
+1.2
RIO
100
*ce
0.0068
+ISV
R9 RIS
IS 1800
03
+1.1
+
~
L-w,.----.....- -16V
C3
~SOO
R7
47
",,-.JVVI<--'-- +16V
+ CS Tsoo
R6
W
L-A./S60'h-...._ +SV
~----<~------~_------------------------------------------_-------417>--+16.5V
I
'-====
OUTPUT SWITCH
=======;-
P=I-
INTERLOCK ~
c=s :'~
- . ' "
"OM "
--" \,:>-
_4
4
2V TO OUTPUT
1
~ 7 SWITCH, KI
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KI
L - - - - - h
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'-----------+---.....- - - -.....
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 > - - - - - - - - - 4 1 8 > - - -16.5V
I
-42V
POWER SUPPLY
r;::V
==
I
INTERLOCK
===\I~
~
, 4 > - - -42V FROM LI
4 1 3 > - - -42V TO C2
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IA71~;;;';;'"
00740- 66527
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~
POWER SWITCH DRIVER
==~~
I
+5V -16V
+AND -16.5V
I POWER SUPPLY
I
V
(UNGUARDED)
~
I
22
1
TPI4
I +16.SV±IV
400MV
P-P RIPPLE
26V
RMS
I
~
21
I
I
20
4
7408-0-0737'&
COPYRIGHT 1966 BY HEWLETT- PACKARD COMPANY
R4
*
R2
VARIABLE WIDTH
5100 27
20KHZ PULSES 01
-16
RI LI
'~c!
180 IOOJl-H
+1.2
RI7
+1.1
2200
I
RS
CRI
220
CR2
+SV
40V
-
=n
80V
J
f
6V
--~.
*
Q I,Q2,
COLLECTORS
STD MODE, IV RANGE, OV OUTPUT
NOTE~
PULSE WIDTH INCREASES TO 20" SEC,
AMPLITUDE TO 10V AT MAX OUTPUT
VOLTAGE AND CURRENT.
I..
SO"SEC--!
STD MODE, IV RANGE, OV OUT
put
~IO"SEC
k- I
SO"SEC~
STD MODE, 10V RANGE 9V OUTPUT, 200.n. LOAD.
b-2SI'SEC--..l
I
SOI'SEC-----..l
STD MODE, 1000V RANGE, 1000V OUTPUT, 5OKll. 20W LOAD
*
A 7TPI6
,.. SOI'SEC-----+-j
--, r-
2 "SEC
I
T
NOTES: FIGURE 7-11
1. VOLTAGES INDICATED IN RED ARE MEASURED WITH FRONT PANEL CON-
TROLS SET AS FOLLOWS:
FUNCTION: STD
RANGE: I'V
VOLTAGE SET: .00000'
2. VOLTAGES AND WAVESHAPES ARE REFERENCED TO
W
AND
W
FIGURE 7-3 (Top and Bottom View) SHOWS THE GROUND POINT LOCATIONS.
TPI3 TPI6
TPI4 TPI5
Ci >
:{"
Ci>
IT}-
@ -RI4-
-C7-
C3
-CR3- -RI6-
-RI3-
-C6-
"1
8
1
IT}-
S
-RII-
C5
-RI2-
- R 7 -
®
-R9-
1
m-
-RI5- CI
@
-R8-
-R6-
C4
J
[[
-RIO-
-C8- -R5-
C2
® -R4-
- L 1 -
1
~
R2
-RI7- -CR2-
KI
-CR6-
-RI- -CRI-
- R 3 - -CR4-
-RI9- -CR5-
I
22
740B-B-0749A
A7
lip
PART NO. 00740-66527