Toshiba DVR80KF Service Manual page 7

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 Clearance Distance (d), (d')
230 V
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.) 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
230 V
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
≥
3.2 mm(d)
≥
6.0 mm(d')
Load Z Leakage Current (i)
2kΩ RES.
i≤0.7mA AC Peak
Connected in
parallel
50kΩ RES.
i≤0.7mA AC Peak
Connected in
parallel
Chassis or Secondary Conductor
d'
Exposed Accessible Part
Z
One side of
B
Power Cord Plug Prongs
One side of power cord plug
i≤2mA DC
i≤2mA DC
1-3-2
Primary Circuit
d
AC Voltmeter
(High Impedance)
prongs (B) to:
RF or
Antenna terminals
A/V Input, Output
Fig. 1
Fig. 2
DVDP_ISP