BK Precision 467 - Troubleshooting Chart Continuation; Leakage and Meter Reading Issues; Tracking and Restore Function Problems

3.
Turn
all
three
G2 controls and Tracking
control
6.
Set
Function
switch to TEST
position.
fully
counter
clockrvise.
7.
Adjust
ned,/e8rW
G2 control so
that Red/B&W
4.
Set
G2 switch to NORJvIAL
position.
:
meter reads full
scale.
5.
ConnectAC
cordof tester into
ll?VAC
outlet and
,
8. Push traqking
button
and adjust Min Pulse
Ca
set Function
switch
to
SET-UP
position
until unit
control
(R23)
on
printed
board
(see
Fig.
2
f.o
wtrrms up.
TROUBLESHOOTING
All
troubleshooting procedures
such as voltage waveform testpoints and the
schematic
.in
Fig.
3
for
measurements,
waveform
analysis,
and
adjustments
correct voltages and waveforms. Disassembly of thr
can be
made from
the bottom
side
of the
printed
printed
board
will only
be
necessary
if
a
componenl
circuit board.
See Fig. 2 for
location of
voltage and needs
replacing.
TROUBLESHOOTING
CHART
Symptom
C heck
Set inoperative.
Power
light
does not come on. 1. Fuse F1.
2. Function
switch
Sl.
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.
Ileater
circuit
inoperative
on
all
positions.
1.
Fuse
F2.
IITR Set
control does not function.
2. Function
switch
Sl.
I
ffi:":ili'":il[*'ji
transrormer 12.
\-'"
5. HTR Cal control R16.
6.
Rejuvenate
switches 56B,
S?B, and
S8B.
7.
Cable
connector
A.
CRT heater
lights. Meter
does
not
indtcate 1.
Meter
Ml.
voltage.
2. HTR Cal control R16.
3.
Diode D30.
4.
Resistors
R17, Rl8, 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,
IC?C,
and
IC2D.
1.
12BH?A tube
Vl.
2. Transistor
Q1.
3. Rectifiers Dl thru
D4.
4.
Transformer
T1.
5.
Capacitors Cll and Cl2.
6.
Resistors
R41 and
R43.
7. Multiplex
generator
waveforms.
8.
IC1A, ICIB, ICZC,
and IC2D.
All
G2 controls
fail
to
adjust
properly.