Agilent Technologies 4339B Service Manual

Check
2, LCD
Displays Anything?
1.
Turn o
the
4339B
.
2.
Turn on
the
4339B
while
watching
the
LCD
.
3.
Check for
a
beep
sound
for
a
moment
and
if
you
see
anything
is
displayed
on the
LCD.
4.
If
beep
sounds
and
LCD
displays
something,
proceed
to
\Check
3,
LCD
Operates
Correctly?",
otherwise
proceed
to
\Check
7,
CPU
P
ower
LED
Lights?".
Check
3,
LCD
Operates
Correctly?
1.
Turn
on
the
4339B
.
2.
Reset
the
4339B
.
3.
Check
if
the
LCD's
back
light
is
lit.
4.
Press
some
front
panel
keys
such
as
4
Meas
Prmtr
5
and
check
if
the
characters
are
correctly
displayed
in
the
whole
area
of
the
LCD
.
5.
If
the
LCD
operates
correctly
,
proceed
to
\Check
4,
Any
Error
Message
on
LCD?",
otherwise
replace
the
LCD
Assembly
.
Check
4,
Any
Error
Message
on
LCD?
1.
Turn
o
the
4339B
.
2.
Turn
on
the
4339B
while watching
the LCD
.
3.
Check
if
the
LCD
displays
any
error message
.
4.
If
an
error
has
NOT
occurred,
replace
the A1
Main
Board
Assembly
,
otherwise
proceed
to
\Check 5,
CPU
Related
Error
Message?".
Check
5, CPU
Related
Error
Message?
1.
If the
error message
is
one
of
the
following
replace
the
A2
CPU
Board
Assembly
,
otherwise
proceed
to \Check
6, Ammeter
Functionality
Check".
a.
ROM
TEST
F
AILED
b.
RAM
TEST
F
AILED
c.
EEPROM
R/W
F
AILED
Note
When
replacing
the
A2
CPU
Board
Assembly
,
refer
to
\Replacing
the
A2
CPU
Board
Assembly"
in
Chapter 3
for handling
the ROM
and EEPROM
on the
A2
Assembly
.
Check 6, Ammeter Functionality Check
1. If the error message is one of
the following, replace the A3 Ammeter Board Assembly
,
otherwise, replace the A1 Main Board Assembly
.
a. A3 BD TEST F
AIL
b. ADC F
AILURE
Troubleshooting 4-13

Agilent Technologies 4339B Specifications

General

Brand	Agilent Technologies
Model	4339B
Category	Measuring Instruments
Language	English