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6. Potentials,as high" as 22.8 kV, are present when
this
receiver is in operation.
Operation the receiver without
the rear cover
involves.the
danger of a shock
hazard
from the receiver power supply.°
Servicing should
not
- be attempted by anyone who is not thoroughly familiar
with
the precautions necessary when working on high
voltage equipment.
Always discharge the anode of the
picture tube to the receiver chassis before handling the
tube.
7. After
servicing
make
the.
following
leakage
current
checks to prevent. the customer from being exposed to
shock hazards.
LEAKAGE
CURRENT
COLD
CHECK
1. Unplug the AC cord and connect a Tanne between the
two prongs on the plug.
2. Turn on the receiver's power switch:
3. Measure
the
resistance
value,
with
an
ohmmeter,
between
the
jumpered
AC
plug
and
each
exposed
metallic cabinet part on the receiver, such as screwheads,
antennas, control shafts, handle bracket, etc.
'When the
exposed
metallic part has a return
path. to the chassis,
the reading should be between 490 kQ and 5.2 MQ.
When the exposed metal does not have a return path to
the chassis, the reading must be ce,
Do not
is returned to the customer.
ABGESCHALTETEN
ZUSTAND
jedem
Chassis hat, mu die Anzeige
oo betragen.
1000
Ohm/Volt
oder: gréRer
Spannung Uber den Widerstand zu messen.
verwenden,
um
die
4. Jedes zuganglich
Metailteil prufen, und an jedem Punkt
die Spannung messen.
5. Den
Netzkabelstecker
einstecken und jede der obigen Messungen wiederholen.
6. Die "Spannung 'darf an
keinem
der Punkte
1,4V eff.
umgekehrt.
in
die
Steckdose
Die Inbetriebnahme des'
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Hot Check Circuit
Schaltungsaufbau fiir Priifung
im eingeschalteten Zustand
TO
INSTRUMENT''S
EXPOSED
METAL PARTS
AN
ZUGANGLICHE
METALLTEILE
DES TV-GERATES
AC VOLTMETER
WECHSELSTROM-
VOLTMETER
-
WATER
PIPE
;
COLD
(EARTH)
KALTWASSE R-
ROHRE
(ERDUNG)
Fig. 1
X-RADIATION
' WARNING:
1. The potential source of X-Radiation in TV
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NOTE:
sets is the High Voltage section and the
picture tube,
2. When
using
a picture tube test. jig for
service,
ensure
that
jig is capable
of
handling
22.8
kV
without
causing
X-
Radiation.
_
. Set the SERVICE switch to SERVICE,
N
use the specified picture tube.
to the set turn on the power switch.
2. Set controls .
Brightness, Contrast
Sub bright
4. Set the voltage to 12.4V.
yest Pevend, ae Minimum position
=,
Abb. 1
ROENTGENSTRAHLUNG
ACHTUNG:
1. Potentielle
Quellen
von
Roentgenstrah-
Verwendung — - eines
len, da es flr die Bewaltigung von 22,8 kV
geeignet
ist, ohne
dafs Ren ins
eany
verursacht wird. -
gepriftes Voltmeter verwendet wird.
1. Den
Helligkeitsregler' volistandig
eintgegen
dem
Uhr-
zeigersinn drehen.
2. Den
SERVICE-Schalter.
stellen.
in die
"SERVICE"-Position
Falls die Anzeige
oe
ene
sofortige
Moglichkeit
von
Roentgenstrahlung
zu
Bildréhre verwendet wird,
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