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1-3-4
TVDVDN_ISP
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. 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
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 terminals,
antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.).
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 both terminals of load Z.
See Fig. 2 and following table.
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
Region
Clearance
Distance (d), (d’)
110 to 130 V
U.S.A. or
Canada
≥
3.2 mm
(0.126 inches)
AC Line Voltage
Region
Load Z
Leakage Current (i)
Earth Ground (B) to:
110 to 130 V
U.S.A. or
Canada
0.15
µ
F CAP. & 1.5 k
Ω
RES. Connected in parallel
i
≤
0.5 mA rms
Exposed accessible
parts
Chassis or Secondary Conductor
Primary Circuit
Fig. 1
d'
d
AC Voltmeter
(High Impedance)
Exposed Accessible Part
B
Earth Ground
Power Cord Plug Prongs
Z
Fig. 2
Содержание CMWC13D6
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