HP 8340b - Page 79

A37
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
32
18
36
Mnemonic
DBO
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
GND
GND
DB10
DB11
LCK4
HULI
GND
GND
GND
GND
PH1
GND
PH2
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
+5.2V
+5..2V
Levels
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TT;
TTL
0V
0V
TTL
TTL
TTL
(LOW
TRUE)
TTL
(HIGH
TRUE)
0V
0V
0V
0V
0 TO
+5V
0V
0 TO
+5V
0V
0V
0V
0V
0V
0V
0V
0V
ov
ov
ov
+5
2V
4-5
2V
Source
XA60P1-20
XA60P1-76
XA60P1-21
XA60P1-77
XA60P1-22
XA60P1-78
XA60P1-23
XA60P1-79
*
A62 STAR
GND
A62 STAR GND
»
»
XA59P1-52
*G
A62 STAR GND
A62 STAR GND
A62 STAR GND
A62
STAR
GND
E
A62 STAR GND
E
A62 STAR
GND
A62 STAR GND
A62 STAR GND
A62 STAR
GND
A62
STAR
GND
A62 STAR GND
A62 STAR GND
A62
STAR
GND
A62 STAR GND
A62 STAR GND
A62 STAR
GND
XA5201-17,18,41,42
XA52P1-17.18.41.42
Destination
*B
*B
*B
*B
•B
•B
•B
•B
*B
*B
*H
*H
*B
•B
*B
XA59P1-106
*H
*H
*H
•H
XA36P1-24
*H
XA36P1-25
*H
•H
•H
*H
*H
*H
*H
*H
•H
•H
*H
•THRU
A62L3
TO H
*THRU
A62L3
TO H
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
Safety Checks