Safety Check After Servicing; Clearance Distance; Leakage Current Test - Denon DVD-1930CI Service Manual

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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 confirm 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
soldered terminals, and between terminals and
surrounding metallic parts. (See Fig. 1)
Table 1: Ratings for selected area
AC Line Voltage
120 V
Note: This table is unofficial and for reference only. Be
sure to confirm the precise values.

2. Leakage Current Test

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Confirm the specified (or lower) leakage current L 13942296513
between B (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.) 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.
Table 2: Leakage current ratings for selected areas
AC Line Voltage
120 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
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Clearance Distance (d), (d')
≥ 3.2 mm (0.126 inches)
Load Z
0.15 µF CAP. & 1.5 kΩ RES.
Connected in parallel
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2 9
8
Chassis or Secondary Conductor
d'
Q Q
3 6 7 1 3 1 5
Exposed Accessible Part
Z
Earth Ground
B
Power Cord Plug Prongs
Leakage Current (i)
i ≤ 0.5 mA Peak
co
.
4
DVD-1930CI / DVD-757
9 4 2 8
Primary Circuit
d
0 5 8 2 9 9 4 2 8
AC Voltmeter
(High Impedance)
Earth Ground (B) to:
Exposed accessible parts
m
9 9
Fig. 1
9 9
Fig. 2