HP 8340b - Page 492

A21
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
HADCEN
LMODHLD
DET
S/H +
DET
S/H
-
+20V
+20V
+5.2V
+5.2V
HLBW
-10v
-10V
GND
GND
HPLSEN
HRFON
LHET
LOPMOD DRY
PLS
IN RTN
PMOD
RTN
PLS IN
HIPMOD
DRV
Levels
TTL
(HIGH TRUE)
TTL
+4.5V/+3.5V
+
3.5V/+
4.5V
+20V
+20V
+5.2V
+5
2V
TTL (HIGH TRUE)
-10v
-10V
0V
0V
TTL (HIGH TRUE)
TTL
(HIGH TRUE)
TTL
(LOW TRUE)
CURRENT SOURCE
0V
PV
TTL
CURRENT TO PIN DIODE
Source
D
E
F
F
XA52P1-16, 40
XA52P1-16,
40
XA52P1-17,18,41,42
XA52P1-17,18,41,42
XA26P1-33
XA53p1-12,13,31,32
XA53P1-12,13,31,32
A62 STAR
GND
A62 STAR GND
XA26P1-2
XA57P1-105
XA27P1-20
C
*
B
A62J26-SMC
CENTER
C
Destination
XA27P1-8
XA26P1-1
XA25P1-2
XA25P1-24
•G
"G
"G
•G
XA26P1-33
•G
•G
*G
*G
*A
*AC
*C
A62J10-SMC
CENTER
*A
*A
A
A62J25-SMC
CENTER
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