HP 8340b - Page 67

A24
Pin
I/O
Pin
1
19
2
20
3
21
4
22
5
23
6
24
7
25
8
26
9
27
10
28
11
29
12
30
13
31
14
32
15
33
16
34
17
35
18
36
Mnemonic
+20V
SYTMHTR
SYTMTHRM
HLBO
+5.2V
HLB1
STAT10
HLB2
-10V
RSTAT
14V/GHZ
PIN BIAS
ATN COIL
+
SRD BIAS
GND
GND PLANE
ATNTH4
ATNAT4
ATNTH3
ATNAT3
ATNTH2
ATNAT2
ATNTH1
ATNAT1
SRD BIAS CONT
HENDKICK
OB9
DB11
DB10
WLEVEL
DB12
DB13
SYTM GND
RGND
Levels
+20V
0
TO
+20V
APPROX.
-5V
TTL
(HIGH TRUE)
+5.2V
TTL (HIGH TRUE)
TTL
(LOW TRUE)
TTL
(HIGH TRUE)
-10V
TTL
(LOW
TRUE)
14V/GHZ
-4V
TO
+12V
+5V
-10VTHRU2KTO+5V
0V
0V
OPEN COLLECTOR
OPEN COLLECTOR
OPEN COLLECTOR
OPEN
COLLECTOR
OPEN
COLLECTOR
OPEN COLLECTOR
OPEN COLLECTOR
OPEN
COLLECTOR
0 TO
-5V
(LEVELED)
TTL (HIGH TRUE)
TTL
TTL
TTL
TTL
(LOW
TRUE)
TTL
TTL
0V
0V
Source
XA5201-16,
40
K
A62J18-9
XA27P1-46
XA52P1-17,18,41,42
XA27P1-16
XA23P1-22
XA27P1-47
XA53P1-12,13,31,32
XA27P1-45
XA28P1-7
G
L
F
A62
STAR GND
INSTRUMENT
GND
J
J
J
J
J
J
J
J
XA26P1-18
XA28P1-18
*H
*H
*H
XA27P1-12
*H
*H
A62J18-13,14,
15
STAR GND
POINT
Destination
•L
A62J18 PIN 8
K
*C
*L
*C
H
•C
"L
•H
*A
A62J18 PIN
10
A62J20
PIN
6
A62J18 PIN 2
*L
*L
A62J20 PIN 4
A62J20 PIN
20
A62J20 PIN 11
A62J20
PIN
5
A62J20 PIN 3
A62J20 PIN 9
A62J20 PIN 13
A62J20 PIN 2
B
H
*
*i
*i
*l
*i
*L
*L
A
single
letter in the
source or
destination
column
refers
to
a
function
block
on
this
assembly
schematic.
An
asterisk
(*)
denotes multiple
sources
or
destinations;
refer
to
the
A62
motherboard
wiring
list
for
a
complete
representation
of
signal
sources
and
destinations.
HP
8340B/41B
Assembly-Level
Service
After
Service
Safely
Checks