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HP 8340b - Page 377

HP 8340b
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AC
MAINS
-b.2V
^
-10V
'
P/0
A53
-40V
r
-4.64V
^
crK,cr
-
B1
FAN
r-1
t
PnWFR
1
^
LINE
'
"'
MODULE
+12V
U1
ADJ-
+5V
SENSE
r
+20V
-
+12V
r
i——^
h.
VDITARF
T1
POWER
TRANSFORMER
P/0
A52
L
VOLTAGE
^
SENSE
HPUP
^
HNUP
20
VOLT
P/
SECONDARY
|
L
-
5 VOLT
r?/
SECONDARY
|
L
-
1D
VOLT
r?/
SECONDARY |
———————————*
L
-
40
VOLT
'"P/
SECONDARY |
l^
L
,
PS
————————^-
0
A19
+20
VOLT
RECTIFIER
0
A35
+5
VOLT
RECTIFIER
0
A19
-10
VOLT
RECTIFIER
0
A35
-40
VOLT
RECTIFIER
+20V
UNPEG
I
START
UP
^S>-
"I
;„
-
J
r-»-
THERMAL
SWITCH
J
V
-1
1
+5V
UNREt
J
1
I
-10V
L
[
-10V
J
-1
-1——————————
J
r
"
^
.
+20V
t
+20V
SHUTDOWN
t
STANDBY
1
JNREG
RTN
-40V
-40V
————————^
+22
PRFCI?;mM
,
REFERENCE
———————————11——i
s
'I
,
L
UNREG
RTN
c
h
-
v
r
^
^
+22V
^
3UPPLY
ENABL
w'
REG
+12V
DISABLE
————[————
V
+12V
REF
~
-I
+5.2V
REF
.
-
-,
t
-10V
REF
-1
•^
Y
+
-40V
r
REG 1
\
+20V
^
RFFFRFUfF
OSCILLATOR
SUPPLY
E
^
+20V
^-----<I-
^
+12V
^
REG
^.
VOLTAGE
j
SENSE
1
'———————1
+5.2V
r
REG
J
A
/h
, .
-5.2V
N!
5,2V
————————*-».
REG
-10V
^
REG
/
^
-
-15V
15V
——————————^
^^
^
A
T
'N!
-40V
^
REG
—————^-
POWER
-
^
REFERENCE
'>
P/0
A35
.>
A52
•>
P/0
A53
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A56
">
P/0
A53
Figure
1-2.
Power Supplies/Fan Simplified Block
Diagram
Potver Supplies/Fan
Simplified
Block
Diagram
1-7/1-8

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