BK Precision 467 User Manual

3.
Turn
all three
G2 controls and
Tracking
control
6.
Set Function
switch
to
TEST
position.
fully
counterclockwise.
7.
Adjust neflggW
G2 control
so
that Red/B&W
4.
Set
G2 switch to NORMAL
position
meter
reads
full
scale.
5.
ConnectAC
cordof tester into
ll?VAC
outlet and
'8.
Push tragking
button
and adjust Min Pulse
Ca
set Function
switch
to
SET-UP
position
until
unit
control
(R23)
on
printed
board
(see
Fig.
2 fo.
warms up.
location)
for
minimum reading.
TROUBLESHOOTING
All
troubleshooting procedures
such
as voltage waveform
test
points
and the
schematic
in
Fig.
3
for
measiurements,
waveform
analysis,
and
adjus.tments
correct voltages and waveforms.
Disassembly of the
can be
made from
the bottom.
side
of the
printed
printed
board
will
only be
necessary
if
a
componen{
circuit board.
See Fig. 2 for
location of
voltage and needs
replacing.
TROUBLESHOOT
ING CHART
Symptom
Check
Set inoperative.
Power
light
does not come on. 1. Fuse F1.
2.
Function switch
51.
Power
light comes
on.
Blue
G2
meter
does
not 1.
Meter M3.
indicate
line voltage.
2.
Function
switch
51.
3. Rectifier
D16.
4.
Resistor
R20.
Heater
circuit
inoperative
on
all
positions.
1.
Fuse
F2.
HTR
Set control
does not
function.
2. Function switch 51.
3. HTR Range
switch
52.
4.
Secondary voltages of transformer
T2.
5. HTR
Cal
control
R16.
6.
Rejuvenate switches
568, S?B, and S8B.
7.
Cable
connector
A.
CRT heater
lights.
Meter
does not
indicate
1.
Meter Ml.
voltage.
2. HTR Cal control R16.
3.
Diode D30.
4.
Resistors
Rl?,
R18,
and R69.
No
Gl control voltage.
1.
Meter M2.
2.
Gl
control
R33.
3. Rectifier D18.
4. Transformer T1.
5.
Capacitor
C20.
6.
Resistors
R32 and R35.
One
G2 control
fails to adjust
properly.
1.
Collectors
of
Q2, Q3,
and
Q4
with scope
for
typical
square
wave.
A straight
line
indicates
a bad transistor.
2.
G2
controls
R49,
R50,
and
R51.
3.
Trans_istors
Q5, Q6, Q?.
4.
Multiplex
generator
voltages and
waveforms.
5.
ICIA,
ICIB,
IC2C,
ard
IC2D.
All
G2 controls
fail
to
adjust
properly.
1. 12BH?A tube
Vl.
2. Transistor
Q1.
3. Rectifiers
Dl
thru
D4.
4.
Transformer T1.
5.
Capacitors Cll and
C12.
6.
Resistors R41 and R43.
7. Multiplex
generator
waveforms.
8.
ICIA, IC1B, IC2C,
and IC2D.

BK Precision 467 Specifications

General

Brand	BK Precision
Model	467
Category	Measuring Instruments
Language	English