JVC DR-MV2SEU Service Manual page 4

1.1.3 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 fol-
lowing tests and confirm the specified values to verify compli-
ance with safety standards.
1.1.3.1 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 Volt age Clear ance Dist ance (d), (d')
220 to 240 V
Note:
This table is unofficial and for reference only.
Be sure to confirm the precise values.
1.1.3.2 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 au-
dio input and output terminals, microphone jacks, earphone
jacks, etc.) is lower than or equal to the specified value in the ta-
ble 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 fol-
lowing table.
Table 2: Leakage current ratings for selected areas
AC Line Voltage
220 to 240 V
Note:
This table is unofficial and for reference only. Be sure to confirm the precise values.
1-4 (No.YD087)
3 mm(d)
6 mm(d')
Loa d Z Leakage Cur rent (i)
2k RES.
i 0.7mA AC Peak
Connected in
parallel
50k RES.
i 0.7mA AC Peak
Connected in
parallel
Chassis or Secondary Conductor
Primary Circuit Terminals
d'
Exposed Accessible Part
Z
One side of
B
Power Cord Plug Prongs
One side of po wer cord plug
i 2mA DC
i 2mA DC
d
Fig.1
AC Voltmeter
(High Impedance)
Fig.2
prongs (B) to:
RF or
Antenna terminals
A/V Input, Output