Agilent Technologies 4263B LCR - Check 2, LCD Displays Anything?; Check 3, LCD Operates Correctly?; Check 4, Any Error Message on LCD?; Check 5, CPU Related Error Message?

Check
2, LCD
Displays Anything?
1.
Turn o
the
4263B
.
2.
Turn on
the
4263B
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
6,
CPU
P
ower
LED
Lights?".
Check
3,
LCD
Operates
Correctly?
1.
Turn
on
the
4263B
.
2.
Reset
the
4263B
.
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 4263B
.
2.
Turn
on
the 4263B
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
replace
the A1
Main
Board
Assembly
.
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, CPU P
ower LED Lights?
1. Turn on the 4263B .
2. Check if the LED \+5V" of DS1 on the A2 CPU Board Assembly lights
.Referto
Figure 4-12
for DS1 location.
3. If the LED lights, proceed to \Check 7, Any Error Code on LED?", otherwise proceed to
\Check 8, CPU Fuse High Lead Voltage".
4-14 Troubleshooting