4
DVM-1845/745
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
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
Note:
This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage
Clearance Distance (d), (d’)
120 V
≥
3.2 mm (0.126 inches)
AC Line Voltage
Load Z
Leakage Current (i)
Earth Ground (B) to:
120 V
0.15
µ
F CAP. & 1.5 k
Ω
RES.
Connected in parallel
i
≤
0.5 mA Peak
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
Summary of Contents for DVM-1845/745
Page 13: ...13 DVM 1845 745 S 15 20 PCB Holder 19 DVD Main CBA Unit Fig D10...
Page 36: ...36 DVM 1845 745 DVD Main 2 4 Schematic Diagram...
Page 37: ...37 DVM 1845 745 DVD Main 3 4 Schematic Diagram...
Page 38: ...38 DVM 1845 745 DVD Main 4 4 Schematic Diagram...
Page 40: ...40 DVM 1845 745 AV 2 2 Schematic Diagram...
Page 41: ...41 DVM 1845 745 Changer 1 2 Function Power Switch Switch Schematic Diagram...
Page 43: ...43 DVM 1845 745 Relay Sensor Mecha Pick Up Unit Schematic Diagram...
Page 57: ...57 DVM 1845 745 Packing X10 X22 X21 X5 X2 X4 S2 S2 S3 S3 S1 A30 A30 A22 S10 X1 S4 Unit...
