Emerson 6420FE Safety Check after Servicing, Clearance Distance, Leakage Current Test

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 posi- tions. Afterwards, perform the following tests and con- firm the specified values in order to verify compliance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance distance (d) and (d') between sol- dered terminals, and between terminals and surround- ing metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

AC Line Voltage	Region	Clearance
		Distance (d), (d')
110 to 130 V	USA or	≥ 3.2 mm
	CANADA	(0.126 inches)

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 be- tween 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 both terminals of load Z. See Fig. 2 and following table.

Table 2 : Leakage current ratings for selected areas

Chassis or Secondary Conductor
Primary Circuit Terminals
d'	d

Fig. 1

	Exposed Accessible Part
Z
1.5kΩ		AC Voltmeter
	0.15∝F	(High Impedance)

B	Earth Ground
	Power Cord Plug Prongs	Fig. 2

AC Line Voltage	Region	Load Z	Leakage Current (i) Earth Ground (B) to:
		0.15µF CAP. & 1.5kΩ	i≤0.5mA rms	Exposed accessible
110 to 130 V	USA	RES. connected in
				parts
		parallel

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

2-4 L6115IMP