Marantz BD7003 Service Manual page 10

Safety Check after Servicing
Safety Check after Servicing
Examine the area surrounding the repaired location Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and
for damage or deterioration. Observe that screws, wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified
values to verify compliance with safety standards.
parts, and wires have been returned to their original
positions. Afterwards, do the following tests and con-
1. Clearance Distance
firm the specified values to verify compliance with
safety standards.
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between
1. Clearance Distance
soldered terminals, and between terminals and
When replacing primary circuit components, confirm
surrounding metallic parts. (See Fig. 1)
specified clearance distance (d) and (d') between sol-
Table 1: Ratings for selected area
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
AC Line Voltage Clearance Distance (d), (d')
120 V
Table 1 : Ratings for selected area
AC Line Voltage
Note: This table is unofficial and for reference only. Be
sure to confirm the precise values.
230 V
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
2. Leakage Current Test
between B (earth ground, power cord plug prongs)
and externally exposed accessible parts (RF termi-
Confirm the specified (or lower) leakage current
nals, antenna terminals, video and audio input and
between B (earth ground, power cord plug prongs) and
output terminals, microphone jacks, earphone jacks,
externally exposed accessible parts (RF terminals,
etc.) is lower than or equal to the specified value in the
antenna terminals, video and audio input and output
table below.
terminals, microphone jacks, earphone jacks, etc.) is
lower than or equal to the specified value in the table
Measuring Method (Power ON) :
below.
Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
Measuring Method (Power ON):
AC voltmeter to measure across the terminals of load
Insert load Z between B (earth ground, power cord plug
Z. See Fig. 2 and the following table.
prongs) and exposed accessible parts. Use an AC
voltmeter to measure across the terminals of load Z.
Table 2: Leakage current ratings for selected areas
See Fig. 2 and the following table.
AC Line Voltage
230 V
Table 2: Leakage current ratings for selected areas
AC Line Voltage
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
120 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
≥ 3.2 mm (0.126 inches)
Clearance Distance (d), (d')
≥
3 mm(d)
≥
6 mm(d')
Load Z Leakage Current (i)
2kΩ RES.
Connected in
parallel
50kΩ RES.
Connected in
parallel
Load Z
0.15 µF CAP. & 1.5 kΩ RES.
Connected in parallel
Chassis or Secondary Conductor
Exposed Accessible Part
Z
One side of
Z
B
Power Cord Plug Prongs
B
i≤0.7mA AC Peak
i≤2mA DC
i≤0.7mA AC Peak
i≤2mA DC
Leakage Current (i)
i ≤ 0.5 mA Peak
1-3-2
8
1-3-2
Primary Circuit
d' d
Chassis or Secondary Conductor
Primary Circuit
d' d
AC Voltmeter
(High Impedance)
Exposed Accessible Part
AC Voltmeter
(High Impedance)
One side of power cord plug
Earth Ground
prongs (B) to:
Power Cord Plug Prongs
RF or
Antenna terminals
A/V Input, Output
Earth Ground (B) to:
Exposed accessible parts
Fig. 1
Fig. 1
Fig. 2
Fig. 2
B1N_ISP
BDP_ISP