HP 4262A User Manual

Section VIII Model 4262A
Table 84
Table 8-4. Front Panel Isolation Procedure.
Symptoms
Probaflb(l)irl("laulty
ZERO
ADJ
L
control
malfunctions
but
measurement
is
made
correctly.
All
Measured
value
is
incorrect
at
a
particular
range
setting.
All
Al2
Measurement
is
not
made
correctly
when
TEST
SIGNAL
setting
is
at
LOW
LEVEL.
All,
Slfe
X
o
Displayed
count
is
unstable
and
fluctuates
several
counts
at
120Hz
measurement.
All,Al4
ZERO
ADJ
C
control
malfunctions
but
measurement
is
made
correctly.
Al2
Autoranging
operation
skips
a
particular
range.
Al2
U-CL
is
displayed
on
every
range.
Al3
Measurement
is
made
only
in
either
PRL
or
SER
mode.
Al3
Display
count
changes
randomly.
Al4
Figure(s) in numeric display is (are) defective. A2
An
indicator
lamp
does
not
light.
A2,
A2]1
Pushbutton
controls
do
not
work
(always
invalid).
A2
A2]1,A23
An
indicator
lamp
stays
lit.
A2l
All
numeric
display
are
blank.
A22
Trigger
lamp
does
not
light
or
stays
lit.
A22,A23
Autorange
control
is
inoperative.
A23
8-20
Note
1:
If
test
signal
voltage
at
Hcur
terminal
is
correct
(140mVp-p),
A13 board is faulty. If not, A11 board is faulty.

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English