JVC HR-D540EE - Page 4

e@ 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. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and exter-
nally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance d
When replacing primary circuit components, confirm specified clearance distance (d), (d’) between
soldered terminals, and between terminals and surrounding metallic parts. See table 1 below. d’
Chassis
Power cord,
Fig. 8 primary wire
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord piug prongs and
externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and
output terminals, microphone jacks, earphone jacks, etc.). Externally
Measuring Method: (Power ON) exposed i « ~~
Insert load Z between earth ground/power cord piug prongs and externally exposed accessible parts. accessible part
Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2. Fig. 9
. Grounding (Class I mode! only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally
exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Grounding Specifications
AC inlet Exposed accessible part
Grounding Impedance (Z)
Z £0.1 ohm
Z 0.5 0hm
Region
USA & Canada
Europe & Australia
Earth pin
Milli ohm meter
Fig. 10
Insulation Resistance (R) Dielectric Strength Clearance Distance (d), (d‘)
AC 1 kV 1 minute d,d’2 3mm
AC 1.5 kV 1 minute d,d’'2 4mm
AC 900 V 1 minute d,d’2 3.2mm
AC 3 kV 1 minute
AC Line Voltage Region
Japan
R21
MQ/500
V
DC
100 to 240 V
110 to 130 V
USA & Canada _
a
110 to 130 V
200 to 240 V
Europe & Australia
R210 Mo /500 V DC
eerie
Table 1
AC Line Voltage
Region
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
——
Load Z
(Class IZ)
AC 1.5 kV 1 minute
(Class I)
Specifications for each region
d 24mm
d’ 2 8 mm (Power cord)
d’ 26 mm (Primary wire)
Leakage Current (i)
a,b,c
Vo
PK
i £1mArms
Exposed accessible parts
USA & Canada
oT fo
1.5kQ
Europe & Australia
i |
i $0.5 mArms
Exposed accessible parts
a ineasnionperaiict ine
i S$ 0.7 mA peak
i<2mAdc
Antenna earth terminals
i S$ 0.7 mA peak
i<2mAde
Tabie 2 Leakage current specifications for each region
Other terminals
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
Il