1-3-2
DVD_SFNP
Fig. 1
Chassis or Secondary Conductor
Primary Circuit
d'
d
AC Voltmeter
(High Impedance)
Exposed Accessible Part
B
One side of
Power Cord Plug Prongs
Z
Fig. 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 their original
positions. Afterwards, do the following tests and con-
firm the specified values to verify compliance with
safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d’) between sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
Note:
This table is unofficial and for reference only.
Be sure to confirm the precise values.
2. Leakage Current Test
Confirm the specified (or lower) leakage current
between B (earth ground, power cord plug prongs)
and externally exposed accessible parts (RF termi-
nals, antenna terminals, video and audio input and
output terminals, microphone jacks, earphone jacks,
etc.) is lower than or equal to the specified value in the
table below.
Measuring Method (Power ON) :
Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across the terminals of load
Z. See Fig. 2 and the following table.
AC Line Voltage
Clearance Distance (d), (d’)
220 to 240 V
≥
3 mm(d)
≥
6 mm(d’)
Table 2: Leakage current ratings for selected areas
Note:
This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage
Load Z
Leakage Current (i)
One side of power cord plug
prongs (B) to:
220 to 240 V
2k
Ω
RES.
Connected in
parallel
i
≤
0.7mA AC Peak
i
≤
2mA DC
RF or
Antenna terminals
50k
Ω
RES.
Connected in
parallel
i
≤
0.7mA AC Peak
i
≤
2mA DC
A/V Input, Output
Summary of Contents for W4A-A4180DB
Page 17: ...1 6 5 E9G02DC Fig D10 20 Deck Pedestal 21 Front Bracket R S 19 S 19 S 19 S 19 S 20...
Page 39: ...1 12 6 E9G00SCM4 Main 4 9 Schematic Diagram VCR Section...
Page 40: ...1 12 7 E9G00SCM5 Main 5 9 Schematic Diagram VCR Section...
Page 41: ...1 12 8 E9G00SCM6 Main 6 9 Front Jack Schematic Diagram VCR Section...
Page 42: ...1 12 9 E9G00SCM7 Main 7 9 Schematic Diagram VCR Section...
Page 43: ...1 12 10 E9G00SCM8 Main 8 9 Schematic Diagram VCR Section...
Page 44: ...1 12 11 E9G00SCM9 Main 9 9 Schematic Diagram VCR Section...
Page 46: ...1 12 13 E9G00SCRJ Rear Jack Schematic Diagram VCR Section...
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