Tektronix 7A42 Instruction Manual page 10

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U530 is the integrated circuit covered by this table. It is shown on
\..V
schematic diagram 5.
,
~~6
u!'.::.:::;:o
0
Number of the setup needed to get each specified "Output Signature." _ _ _ _ _ _ _ _ _ _ _ _
-l.~1
(Setups are listed in Setup Procedures for each SA Test.)
OUTPUT
SETUP
OUTPUT
- -----------------------------------~~I
f3\
IC pins where the Output Signatures are taken.
P I
t·~
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1-------.----. . . . . .
OUTPUT
- ------------------------------------------------------~~I
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Output Signatu res for U530. S I Ci H
n
T 1..1
F.: [
Matching Output Signature:
Indicates that integrated circuit is operating properly. Proceed to
the next node on the "Starting Point" in the SA Test being
performed.
Wrong Output Signature:
Indicates the U530 or its input is at fault. Consecutively check
the Input Signatures (step 7) across from the arrows that are
directly below the Output Pin and Output Signature being
checked (steps 3 and 4).
r-
r-
r-
r-
r-
Setup number required to obtain each specified Input Signature. ______ - - - - - - - - - - - - - - - - - - - - - - - - - - -
Setup numbers are listed in Setup Procedures for each SA Test.
U530 pins where the Input Signatures are available. A double asterisk
(**) instead of a pin number here indicates that the specified input
signature cannot be checked directly at any U530 input pin; the
signature will be available only at the output node of the source IC.
Input Signatures for U530.
Correct Input Signature:
Proceed down the column (beneath the Output Pin and
Signature being checked) to the next arrow and subsequent
Input Setup, Pin, and Signature.
Wrong Input Signature:
Proceed to step 8.
----
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Check the Input's Source Node signatu
If the source node signature is wron
at the input pin of the subject IC (U!
signature tests using the SA Table fl
(e.g., A6U800 pin 15).
If the source node signature does no
check for continuity between the
integrated circuit U530.
Figure 2-1. Example for using the Signature Analysi: