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 compli-
ance 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 table 1 below.
3. Clearance distance
d
When replacing primary circuit components, confirm specified clearance distance (d), (dO) be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.d'
Chassis
Power cord,
primary wire
Fig. 8
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.).ab
Measuring Method : (Power ON)c
ZA
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-Externally
ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 andexposedV
following table 2.accessible part
Fig. 9
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 milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Grounding Specifications
AC inletExposed accessible part
RegionGrounding Impedance (Z)
USA & CanadaZ 0.1 ohmd
Earth pinEurope & AustraliaZ 0.5 ohmd
Milli ohm meter
Fig. 10
AC Line VoltageRegionInsulation Resistance (R)Dielectric StrengthClearance Distance (d), (d')
100 VAC 1 kV 1 minuted, d' 3 mmd
JapanR 1 Md&/500 V DC
100 to 240 VAC 1.5 kV 1 miuted, d' 4 mmd
110 to 130 VUSA & Canada�AC 900 V 1 minuted, d' 3.2 mmd
AC 3 kV 1 minute d 4 mmd
110 to 130 V(Class 2)
Europe & AustraliaR 10 Md&/500 V DCd' 8 mm (Power cord)d
200 to 240 VAC 1.5 kV 1 minute
d' 6 mm (Primary wire)d(Class 1)
Table 1 Specifications for each region
AC Line VoltageRegionLoad ZLeakage Current (i)a, b, c
100 VJapani1d
mA rmsExposed accessible parts
1 k&
0.15 ?F
110 to 130 VUSA & Canadaid
0.5 mA rmsExposed accessible parts
1.5 k&
id
0.7 mA peak
110 to 130 VAntenna earth terminals2 k&i2d
mA dc
Europe & Australia
220 to 240 Vid
0.7 mA peak
Other terminals50 k&i2d
mA dc
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
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