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BEFORE RETURNING THE RECEIVER
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
(Fire & Shock Hazard)
Before returning the receiver to
Before returning the receiver to
the following safety checks.
the following safety checks.
1.
1.
Inspect all lea
Inspe
ct all
not pinched or that hardware is not lodged between
not pinched or that hardware is not lodged between
the chassis and other metal parts
the chassis and other metal parts
2.
2.
Insp
Inspect all prot
ect all
control knobs, insulating materials, cabinet backs,
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
isolation resistor-capacity networks, mechanical
insulators, etc.
insulators, etc.
3.
3.
T
T
o be sure that
o be sure that
leakage current in the
leakage current in the
Plug the AC cord directly int
Plug the AC cord directly
•
•
(Do not use an isolation transformer for this test).
(Do not use an isolation transformer for this test).
Using two clip leads, connect a 1.5k ohm, 10 watt
Using two clip leads, connect a 1.5k ohm, 10 watt
•
•
resistor paralleled by a 0.15
resistor paralleled by a 0.15
all exposed metal cabinet parts and a
all exposed metal cabinet parts and a
ground, such as electrical conduit or electrical ground
ground, such as electrical conduit or electrical ground
connected to earth ground.
connected to earth ground.
Use an AC voltmeter having with 5000 ohm per volt,
Use an AC voltmeter having with 5000 ohm per volt,
•
•
or higher, sensitivity to measure the AC
or higher, sensitivity to measure the AC
across the resistor.
across the resistor.
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SAFETY NOTICE
SAFETY NOTICE
Many electrical and mechanical parts in television
Many electrical and mechanical parts in television
receivers have special
receivers have special
These characteristics are often not evident from visual
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
characteristics are identified in this manual; electrical
components having such features are identified by
components having such features are identified by
and shaded areas in the Replacement Parts Lists and
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
Schematic Diagrams.
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IMPORTANT SERVICE SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRECAUTION
the user, perform
the user, perform
lead dress t
d dress
to make cer
o make
certain th
tain
in the receiver.
in the receiver.
protectiv
ective devices suc
e devices
such as non-met
h as
no shock
no shock haza
hazard exists
rd
exists, check for
following manner.
following manner.
into a 1
o a
110~220 volt AC outlet,
10~220 volt AC outlet,
F capacitor in series with
F capacitor in series with
µ
µ
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1
safety-related characterist
safety-related
characteristics.
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(Continued)
(Continued)
Connect the resistor connection to all exposed metal
Connect the resistor connection to all exposed metal
•
•
parts having a return to the
parts having a return to the
cabinet, screw heads, knobs and control shafts,
cabinet, screw heads, knobs and control shafts,
escutcheon, etc.) and measure the AC voltage drop
escutcheon, etc.) and measure the AC voltage drop
across the resistor.
across the resistor.
AII checks must be repeated with the AC line cord
AII checks must be repeated with the AC line cord
plug connection reversed. (If necessary, a non-
plug connection reversed. (If necessary, a non-
that leads a
at leads
are
re
polarized adapter plug must be used only for the
polarized adapter plug must be used only for the
purpose of completing these check.)
purpose of completing these check.)
Any current measured must not exceed 0.5 milliamp.
Any current measured must not exceed 0.5 milliamp.
non-metallic
allic
Any measurements not within the limits outlined
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
above indicate of a potential shock hazard and
corrective action must be taken before returning the
corrective action must be taken before returning the
instrument to the customer.
instrument to the customer.
, check for
known earth
known earth
voltage drop
voltage drop
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For continued protection, replacement parts must be
For continued protection, replacement parts must be
ics.
identical to those used in the original circuit. The use of
identical to those used in the original circuit. The use of
substitute replacement parts which do not have the
substitute replacement parts which do not have the
safety characteristics as the factory recommended
safety characteristics as the factory recommended
replacement parts shown in this service manual, may
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.
create shock, fire, X-radiation or other hazards.
å
å
"
"
"
"
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1.5k ohm
1.5k ohm
10W
10W
0.15
0.15
µF
µF
TEST
TEST
PROBE
PROBE
TO
TO
E
E
X
X
POSE
POSE
D
D
M
M
ET
ET
AL
AL
P
P
A
A
RTS
RTS
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29FL94
29FL94
chassis (antenna, metal
chassis (antenna, metal
C
C
O
O
NN
NN
E
E
C
C
T
T
TO
TO
KN
KN
N
N
H
H
O
O
W
W
E
E
A
A
RT
RT
G
G
RO
RO
UN
UN
D
D
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same
same
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