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NOTE
1
The
Signature
Analyser
Controls
Should Be
Set
As
Follows For
This
Test:
LINE
ONflNJ
START
(IN)
STOP
J'(OUT)
CLOCK
y(OUT)
HOLD
OFF
(OUT)
SELF TEST
OFF
(OUT)
+5V; 02C2
Be
Certain
That;
The
Test
Jumper
On
The
A3
Assem-
bly
Is
Disconnected.
The
Plug
Is
Disconnected
Prom
A1J7 And
The
HP-16
Ad-
dress
Switches
Are
All
Set
To The "0"
Position. Tori*
The
Instrument
ON.
Connect
The
Signature
Analyzer
START
And
STOP
Inputs
To
A3TP3.
Connect
The
CLOCK
Input
To A3TP5 And
The
GND
Input
To
Chassis.
(See
Note
1
For
Signature
Analyzer Control
Settings.)
Use
The
Signature Analy-
zer
To
Check
The
Device
Select Input Signatures
At
The
Following
Points:
Location
Signature
A1U33
Pin
1
6242
Pin
2
3A9F
Pin
3
2A6F
Pin
4
23F9
^
Are
These
Signatures
Correct?
The
Signature
At
A1U46
Pin
3
—
.
5AP5?
/
The
Signature
At
A1
U46
Pin
2
•\
U5P6?
/
The
Signature
At
A1U46
Pin
1
\
5857?
/
' The
Signature
^
At
A1U38
Pin II
\
CU60?
/
A3
Assembly
A1U32.
U34.
U39
U42.
U44.
U45
Or
U46.
The
Signature^
At
A1U38
Pin
8
•s.
P737?
/
The
Signature^N.
yes
A
t
A1U38
Pin
12
\
P737?
A1U38
Or
U41.
A1U36,
U37. Or U38.
A1 U36.
U37
Or
U38.
The
Signature
^
At
A1U39
Pin
10
\
2P58?
/
''^The
Signature^
At
A1U32
Pin
3
\
02C2?
^
A1U19, U20
Or U32.
The Signature^
At
A1U39Pin11
•\
2FPA?
/
A1U18.U170r
U39
The
Signature
At
A1
U8
Pin
2
\
4C96?
/
The
Signature
At
A1U32
Pin 11
\
02C2?
A1U11.U26
Or
U32
A1U35,
U43
Or
U46.
''^The
Signature^
At
A1U32
Pm
4
\
2FPA?
^
A1U32
Or U41
The
Signature^
Ai
A1U33 Pm
11
\
5UH2?
/
A1U21.U22or
U33.
The
Signature
At
AlUSPin
1
\
4924?
^
A1U8.U16.
U16, Or U18.
The
Signature
At
AI U7
Pin
6
\
HC61?
/
The
Signature
^
At
A1U41
Pm
13
\
AC4A?
/
A1U41,
U48,
U54
Or
U63
^
The
Signature^
At
A1U39
Pin
9
V.
BAPS?
/
Turn
The
Instrument
OFF
And
Carefully
Remove
RAM's
A1U44
And
U45.
Turn
The
Instrument
ON-
•"^The
Signature^
AIA1U39
Pin
9
•s.
Now
5AP5?^
The
Signature
At
A1U32
Pin
5
•\
U754?
/
' The
Signature
^
At
A1U33 Pm
12
\
7731?
A1U24.
U25
0r
U33.
Tyes
/
'*
\
The
Signature
YFS
A1U32
Or
039
1
At
A1U39
Pin
13
USP6?
The
Signature
^
At
A1U32
Pin
10
\
4924?
The
Signature
NO
^
The
Signature
NO
».
1
AI
032
Or 041
AtA1U7 Pm
5
^
•
A1U7
Or
A1U41
C
AtA1U41 Pm
15
A1U41
Or
U64
H9H3?
0207?
The
Signature
^
At
A1U33
Pin
13
\
H4CH?
J
1
>0
\
AI
029.
031
Or 033.
1
A104.
08.
Or U32.
A1U1
Or
A1U7
A1U38,
U39
Or
U41.
A3
Assembly
A1U32.
U34.
U39. U42. U44,
U45
**^The
Signature^
At
A)U33 Pm
7
\
0066?
^
A1U33
Or
U64
A3
Assembly
Or
A1U33,
U41.
RAM
A1U44
Or
045.
The
Signature
^
At
A1U33 Pm
14
\
5A8F?
/
A1U23
Of
U33
The
Signature
At
A1U33
Pin
\
F541?
A1U33
0r 051
The
Signature
At
A1U33
Pin
9
\
1764?
/
A1U33
Of
A1Q7
The
Device
Select Circuits
Are
Operating
Correctly.
3455
-
0-19
Go
To
The
Interrupt
Troubleshooting
Proced-
ure.
The
Signature
^
At
A1U33 Pm
10
55PA?
/
A3
Assembly Or
A1U33
Figure 8-H-24.
Outguard
Troubleshooting Procedure
Diagram.
Device
Select Circuitry.
8-J27/8-128
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