Advertisement
1.1.2 Safety Check after Servicing
Examine the area surrounding the repaired location for damage
or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following
tests and confirm the specified values in order to verify
compliance with safety standards.
(1) Insulation resistance test
Confirm the specified insulation resistance or greater
between power cord plug prongs and externally exposed
parts of the set (RF terminals, antenna terminals, video and
audio input and output terminals, microphone jacks,
earphone jacks, etc.).See table 1 below.
(2) Dielectric strength test
Confirm specified dielectric strength or greater between
power cord plug prongs and exposed accessible parts of
the set (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone
jacks, etc.). See Fig.1-1-11 below.
(3) Clearance distance
When replacing primary circuit components, confirm
specified clearance distance (d), (d') between soldered
terminals, and between terminals and surrounding metallic
parts. See Fig.1-1-11 below.
d '
Chassis
Fig.1-1-8
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
Europe & Australia
200 to 240 V
AC Line Voltage
100 V
USA & Canada
110 to 130 V
110 to 130 V
Europe & Australia
220 to 240 V
NOTE:
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
d
Power cord
primary wire
Insulation Resistance ( R )
Region
Japan
R
USA & Canada
1 M
R
Region
Japan
0.15
(4) Leakage current test
Confirm specified or lower leakage current between earth
ground/power cord plug prongs and externally exposed
accessible parts (RF terminals, antenna terminals, video
and audio input and output terminals, microphone jacks,
earphone jacks, etc.).
Measuring Method: (Power ON) Insert load Z between
earth ground/power cord plug prongs and externally
exposed accessible parts. Use an AC voltmeter to
measure across both terminals of load Z. See Fig.1-1-9
and following Fig.1-1-12.
Externally
exposed
accessible part
(5) Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between
earth pin in AC inlet and externally exposed accessible
parts (Video in, Video out, Audio in, Audio out or Fixing
screw etc.).Measuring Method:
Connect milliohm meter between earth pin in AC inlet and
exposed accessible parts. See Fig.1-1-10 and grounding
specifications.
AC inlet
Earth pin
Grounding Specifications
Region
USA & Canada
Europe & Australia
Dielectric Strength
AC 1 kV 1 minute
1 M /500 V DC
AC 1.5 kV 1 minute
R
12 M /500 V DC
AC 1 kV 1 minute
AC 3 kV 1 minute
10 M /500 V DC
AC 1.5 kV 1 minute
Fig.1-1-11
Load Z
Leakage Current (i)
i
1
i
1.5
i
2
i
i
50
i
Fig.1-1-12
a
b
c
Z
A
V
Fig.1-1-9
Exposed accessible part
MIlli ohm meter
Grounding Impedance ( Z )
Z
0.1 ohm
Z
0.5 ohm
Fig.1-1-10
Clearance Distance ( d ) , ( d' )
d, d '
3 mm
d, d '
4 mm
d, d'
3.2 mm
d
4 m m
( Class
)
d'
8 m m ( Power cord )
6 m m ( Primary wire )
d'
( Class
)
a, b, c
1 mA rms
Exposed accessible parts
0.5 mA rms
Exposed accessible parts
0.7 mA peak
Antenna earth terminals
2 mA dc
0.7 mA peak
Other terminals
2 mA dc
(No.YF436<Rev.001>)1-3
Hide quick links:
Advertisement
