JVC AA-V6U Service Manual page 4

@ 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 piug prongs and exter-
nally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
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 1 below.
Chassis
Power cord,
Fig. 8 primary wire
4. Leakage current test
Confirm specified or lower leakage current between 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.).
Externally
Measuring Method: (Power ON) exposed 7 |
Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. accessible part W)
Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2. Fig. 9
. Grounding (Class I model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externaily
exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect mijli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Grounding Specifications
Grounding !mpedance (Z)
USA & Canada Z $0.1 ohm
Europe & Australia Z {0.5 o0hm
AC inlet Exposed accessible part
Earth pin
Mitli ohm meter
Fig. 10
AC 3 kV 1 minut
110 to 130 V
MUTE
d 24mm
(Class) |} 1 , 5
200 to 240 V
pe Osteo
sere
AC1.5kV1minute
| ¢ = 8mm (Power cord)
Europe & Australia
Table 1 Specifications for each region
0.15 uF
110 to 130 V USA & Canada fhe 2 Exposed accessible parts
i S 0.7 mA peak
.
; i = 0.7 mA peak
Table 2 Leakage current specifications for each region
3
3
110 to 130 V
220 to 240 V
Europe & Australia
3
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
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