Electronic Keyer pow-
ered from a 230
V
AC
line source.
A
.068
yfd
600 volt capacitor
is
connected in series with
one side of the AC line.
This capacitor can be
obtained from a local
Radio and TV Service
store.
-
DO
F
IKOO
z
zz
0
v,
>,
z
0
4s
d
22
230V
PLUG
230
V
AC
OPERATION
AND
CONNECTIONS
Figure
8
230
V
AC
OPERATION
Figure
8
shows the
IN
CASE
OF
DIFFICULTY
0
0""
'B
*
=g
2
z
zs
2
A
0
s
04
zz
(;I
NOTE:
Refer to the Kit Builders Guide for
Service and Warranty information.
1.
A review of the Operating and Installation
sections of the Manual may indicate any
conditions overlooked.
2.
The Circuit Descripton will prove helpful
in indicating where to look for trouble.
3.
Recheck the wiring. Trace each lead in col-
ored pencil on the Pictorial as it
is
checked.
It
is
frequently helpful to have afriend check
your work. Someone who
is
not familiar with
the unit may notice something consistently
overlooked by the constructor.
4.
It
is
interesting to note that about 90%of the
kits that are returned for repair, do not
function properly due to poor connections
and soldering. Therefore, many troubles can
be eliminated by reheating all connections
to make sure that they are soldered as
described in the Soldering section of the Kit
Builders Guide.
5.
Check the values of the parts. Be sure that
the proper part has been wired intothe cir-
cuit, as shown in the pictorial diagrams and
as
called out in the wiring instructions.
6.
Check for bits of solder, wire ends
or
other
foreign matter which may be lodged in the
wiring, and pinched cables.
7.
If,
after careful checks, the trouble
is
still
not located
and
a
voltmeter
is
available,
check voltage readings against those shown
in Figure
9.
NOTE:
All voltage readings
were taken with an
11
megohm input vacuum
tube voltmeter. Voltages may vary as much
as 10%.
To aid in servicing or troubleshooting the
Electronic Keyer, refer to the voltage readings
on Figure
9
on Page
32
and
the Circuit Board
X-Ray Views shown on Page 41.
Breaks in the foil of the circuitboardcan easily
be detected by placing a bright light under the
foil side of the board and looking through the
board from the lettered side.
A break will
appear as a hair-line crack in the foil. A break
in the foil can be repaired by soldering a short
length of bare wire across the break.
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