HP 8642A Operating Manual page 475

+J5V SENSE
POINT REF
56 G D ~
POHER SUPPLIES
AND GROUND
< 17
>-is,
^•20
< 16
K.
< 15
-< IB
-< 14
P/O A2 MODULATION MODULE ( 0 8 6 4 2 - 6 0 1 2 3 )
r
OSC FET BI
!
S
t OSCILLATOR
OSC DAC BITS
isGD
10
0
+ 15V
POWER SUPPLY AND QND
, +15V PROTECTED —
+ 15V1F1)
ICRl
+15V PTCTD
ICR2
+ 5V[F1)
■
t
l C 1 2 6 ±C127
T o . i u L
■ + 15V(REF)
+ 15V
PROTECTED
-GDi5,
16,
17
+ 15V
I c i n
6.BU
l C 1 1 9
■ + 15V(F1)
+ 15V(F1)
+5V
-15V
I
*lC122 i T l i T
J33M JO.itf
■+5V(F1)
*5VIF1)
-5V
f f f 15V (Fl)
I
-LC120 X c i 2 i
+ | 6 . 8
W
f o . l / i 1 -15V (M?
N
. C124
GND
I
J.U124
+ J 3 3
W
.C125
O.i/J
f - - 5 V | F l )
-5V(F1)
GNO
+ 15V[REF)
- G D 15,16
_
13
+15V PTC
R7
19.
U43
KOSC QBO 13
14
KOSC DB1
12
KOSC DB2
11
KOSC 0B3
10
NOSC DB4
KOSC DBS
kOSC DBS
kOSC OB7
kOSC DBS
OSC DB9
15 n
RB
20k
t
cr osc
J ADJUST 2
NC' 16 n
[D/A CON
(CMOS)
A
„ ,0
1023
[V REF±]
[R FBJ
PONER SUPPLY
AND GND
-GD is
-12
+ 5V(Fi),
GND
^
POWER SUPPLY
AND GNO
■GD 15,16,17
TP30
SEHIAL. PREFIX: 2427A