Admiral 21w1, 21y1, 21z1, 21z1a schematic
VOLTAGE
(Voltages
• TV
voltages
taken
with
function
folly
clockwise. CHANNEL control
set at
approximately
rotation.
TV
•
Radio voltages
voltages
measured
sockets
(with
approximately
• B
plus
voltages
position.
Voltages marked
•
Line voltage
•
Voltages
measured with a vacuum tube voltmeter between
chassis,
unless
Voltages
at
Pulsed
high
cap of the
1B3GT
MENTS FROM
Picture lube
should
be
taken only
with a high
voltage
mately
14.5
KV.
ing
filament
brilliancy
TV
TUNER
half
antenna
disconnected
V701
from
tube
removed), B plus
275
volts.
at
V203
117
volts
otherwise indicated.
VlOl,
V102,
voltages
are
tube.
THESE
POINTS
2nd
anode voltage
with a high voltage instrument such
probe.
Proper
filament
as
IIIRIET
SIIKH
COIIS
LIOI I 1102
switch
rotation.
from
and
V702
taken
underside
of
and
V204,
will
with
an
asterisk * will
AC.
V306
measured
present
on the cap of
NO
ATTEMPT
WITHOUT SUITABLE
can be
2nd
anode voltage
voltage check
compared
with
94C37-1
SETTIIC
SELECTS
FBI
CHl.HEl
DATA
ghren
on
schematic)
on
"TV
set on an
Vert.
tube
voltage
be
from
CAUTION
that
Pill
DESIRE!.
position. PICTURE
unused channel.
Lin.
and
set
with
terminals
with
function
sockets. When measured
at
pins 5 and 6 of
slightly
higher
vary
top of
socket
V406,
SHOULD
BE
measured
from
for
21W1.
of the
1B3CT
obtained
with a 1.5
Of
shorted.
switch
when
widely
with
MADE
TEST
the 2nd
as a
kilovoltmeter
and
lube
Other
set
at
approximately
on
from
V701
set is
switched
with
control
tube
socket
lube
removed.
TO
TAKE
EQUIPMENT.
anode
21Z1A chassis
may be
volt
dry
Height
and on the filament
21Z1
control
front
"Rad"
and
V702
terminals
terminals
connector
or
made
cell
turned
controls
half
position;
top of
tube
will
to
"Rad"
setting.
and
and
MEASURE-
and
other
meter
is
approxi-
by
observ-
battery.
be
Note:
This
schematic
6AU6
SOUND
IF (A5
IJOV
applies
Figure
only
52.
to
6BA6
IFKP.
Sch
chassis
If a different
Tuner
is
used
see
Service
Manual
Supplement
S362C
to be
ed
at a
later date.
TV
in
set,
No.
print-
misutci
urn
tat
RF
6J6
MIXER
teamen
ftoi
socin.
'"Sfc
ill
I/26SN7GT
<n
^1
"•s/l I MM
Jo
|i
""'L
5!^»Et
*MI6
?!;«"
2.
Schematic
chassis
stamped
for
21W1, 21Y1, 21Z1
Run 20 to Run 26.
and
21Z1A Television
and
Radio
Chassis,
(Waveforms
Waveforms taken with picture control
normal picture
Waveforms
The
requency),
mlses
The
'£
the
(in
at
oscilloscope
or for
appear
on the
peak-to-peak
oscilloscope
sync).
video
sweep
7875
voltage
and
and
cycles
screen.
parts
sync
is
adjusted
(which
readings
tolerances.
stages
WAVEFORM
given
set
fully
obtained with
for 30
is
one-half
shown
are
DATA
on
schematic)
to the
cycles
of the
subject
right,
transmitted
(which
is
horizontal
to
some
all
other
signal
one-half
frequency)
variations
controls
input
of
due to
to
the
so
set for
receiver.
vertical
that
two
response
{17")
H9f
IS
CHASSIS.
U8EHIHC
SBffSSr
SHOW
in
SBOSSf
Jf
PIH
R/GHI.
ntmr
ri/rfi
tsociir
mi
rim
tfiem
miners
rtif
somr
fia/
run
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