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8.
Check
the
A33
EXT
I/O
Interface
The
A33
EXT
I/O
in
terface
is
used
to
con
trol
the
external
instrumen
t
like
the
prin
ter/scanner/handler.
If
the
external
instrumen
t
is
not
w
orking,
p erform
the
follo
wing
pro cedure
to
v
erify
the
EXT
I/O
in
terface.
Press
4
PRESET
5,
4
SYSTEM
5,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE
MENU
,
NNNNNNNNNNNNNNNNN
TESTS
,
4
5
5,
4
2
5,
4
x1
5,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE
TEST
to
run
the
in
ternal
test
52:
24
BIT
I/O
POR
T.
If
the
in
ternal
test
52
passes,
the
A33
EXT
I/O
in
terface
b oard
is
probably
w
orking.
Insp
ect
cables
b et
w
een
the
A1
CPU
and
the
A33
EXT
I/O
in
terface.
If
the
cable
is
go
o d,
c
hec
k
the
external
instrumen
t.
If
the
in
ternal
test
52
fails,
replace
the
A33
EXT
I/O
in
terface
b oard.
Digital
Control
Troubleshooting
8-11
Summary of Contents for 4395A
Page 10: ......
Page 26: ......
Page 34: ......
Page 77: ...Figure 2 17 B R Magnitude Ratio Phase Dynamic Accuracy Test Setup 2 Performance Tests 2 43 ...
Page 167: ...Figure 5 1 Adjustment Hardware Setup Adjustments 5 5 ...
Page 186: ...Figure 5 13 Receiver Gain Adjustment Location 5 24 Adjustments ...
Page 190: ...Figure 5 16 Receiver Flatness Adjustment Setup 1 MHz 5 28 Adjustments ...
Page 194: ...Figure 5 20 DC Bias Adjustment Setup 2 5 32 Adjustments ...
Page 196: ...Figure 6 1 Troubleshooting Organization 6 2 Troubleshooting ...
Page 206: ...Figure 7 1 Power Supply Lines Simplified Block Diagram 7 2 Power Supply Troubleshooting ...
Page 212: ...Figure 7 5 A1 CPU Connector Locations 7 8 Power Supply Troubleshooting ...
Page 220: ...Figure 8 1 Digital Control Group Simplified Block Diagram 8 2 Digital Control Troubleshooting ...
Page 240: ...Figure 10 1 Top View Major Assemblies 10 4 Replaceable Parts ...
Page 292: ...Table A 2 Manual Changes by Firmware Version Version Make Manual Changes A 2 Manual Changes ...
Page 308: ......
Page 311: ...Figure B 1 Power Cable Supplied Power Requirement B 3 ...
Page 312: ......
Page 342: ......