Daewoo DVR-1181 D(BB), Service Manual

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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
1. Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the 1.
1. set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). 1.
1. See table below.
2. Dielectric strength test
1. Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set
1. (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See
1. table below.
3. Clearance distance
1. When replacing primary circuit components, confirm specified 1. 1. 1.
1. clearance distance (d), (d') between soldered terminals, and between
1. terminals and surrounding metalic parts. See table below.
Table 1: Rating for selected areas
*Class
¥–
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
1. Confirm specified or lower leakage current between B (earth ground, power cord plug prongs) and externally exposed 1. 1. 1.
1. accessible . parts (RF terminals, antenna terminals, video and audo input and output terminals, microphone jacks, earphone
1. jacks etc.)
1. Measuring Method: (Power ON)
1. Insert load Z between B (earth ground, power cord plug prongs) and
1. exposed accessible parts. Use and AC voltmeter to measure across
1. both terminals of load Z.
1. 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
Note : and locality.
AC Line Voltage Region Insulation dielectric Clearance
Resistance Strengthe Distance (d), (d')
100V Japan 1M/500 V DC 1kV 1 minute
¡ˆ
3 mm
110 to 130V USA & --- 900 V 1 minute
¡ˆ
3.2 mm
Canada
* 110 to 130 V Europe 10 M/500 V DC 4kV 1 minute
¡ˆ
6 mm (d)
200 to 240 V Australia
¡ˆ ‘
mm (d')
Primary circuit terminals
Fig.8
AC voltage
(high impedance)
AC Line Voltage Region Load Z Leakage Curent (i) Earth Ground
(B) to:
100V Japan i
¡´
1mA rms Exposed accessible
parts
110 to 130 V USA & i
¡´
0.5 mA rms Exposed accessible
Canada parts
110 to 130 V Europe i
¡´
0.7 mApeak antenna earth
200 to 240 V Australia i
¡´
2 mAdc terminals
i
¡´
0.7 mApeak Other terminals
i
¡´
2 mAdc Other terminals
1K
¥
1K ¥
1K
¥
1.5K
¥
1.5k
¥
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