• • • • • • •
I N F O R M A T I O N
• • • • • • •
• 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 externally exposed parts
of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone
jacks, etc.). See table 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 below.
3. Clearance distance
When replacing primary circuit components, confirm specified
clearance distance (d), (d') between soldered terminals, and
between terminals and surrounding metalic parts. See table
below.
Table 1: Rating for selected areas
* Class
II
model only.
Note: This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country
and locality.
4. Leakage current test
Confirm 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 and AC voltmeter
to measure across both terminals of load Z. See figure and
following table.
Table 2: Leakage current ratings for selected areas
Note: This table unofficial and for reference only. Be sure to
confirm the precise values for your particular country and locality.
Z
Exposed
accessible
part
AC Voltmeter
(high impedance)
Earth Ground
power cord plug prongs
B
Fig. 2
AC Line Voltage
Region
Insulation
Dielectric
Clearance
Resistance
Strength
Distance (d), (d')
100V
Japan
≥
1 M
Ω
/500 V DC
1kV 1 minute
≥
3 mm
110 to 130V
USA &
– – –
900V 1 minute
≥
3.2mm
Canada
* 110 to 130 V
Europe
≥
10 M
Ω
/500 V DC
4 kV 1 minute
≥
6 mm (d)
200 to 240 V
Australia
≥
8 mm (d')
(a: Power cord)
Fig. 1
d
Primary circuit terminals
Chassis
d'
a
AC Line Voltage
Region
Earth Ground
Load Z
Leakage Current (i)
(B) to:
100V
Japan
¡
≤
1m A rms
Exposed accessible
parts
110 to 130 V
USA &
¡
≤
0.5 m A rms
Exposed accessible
Canada
parts
¡
≤
0.7 m A peak
Antenna earth
110 to 130 V
Europe
¡
≤
2 m A dc
terminals
200 to 240 V
Australia
¡
≤
0.7 m A peak
Other terminals
¡
≤
2 m A dc
1k
1.5k
1.5kµF
2k
50k
Summary of Contents for DV-K*84W Series
Page 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W...
Page 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM...
Page 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y...
