A1-2
IMPORTANT SERVICE SAFETY INFORMATION
Safety precautions to be followed during servicing:
1.
2.
Parts marked with an
are critical parts for safety. Replace only with the one described in the parts
list.
Before returning the DVD product to the customer, make the appropriate leakage current check or
resistance measurements to ensure that exposed parts are properly insulated from the supply circuit.
A leakage current check is recommended for this unit. Plug the AC line cord directly into a 120V 60Hz AC
outlet (do not use an isolation transformer for this check). Use a leakage current tester (Fig. 1) or a
metering system which complies with Underwriters Laboratories (UL 1492). Measure for current from all
exposed metal parts of the cabinet to a known earth ground: particularly, any exposed metal part having a
return path to the chassis. Any current measured must not exceed 0.5mA. Any measurement not within
the limits outlined above are indicative of a potential shock hazard and corrective action must be taken
before returning the unit to the customer.
KNOWN EARTH
GROUND
1.5K ohm
0.15
µ
F
(Reading should not be above 0.5mA)
Leakage Current Tester
TEST PROBE
Test all exposed
metal surfaces
PRODUCT UNDER TEST
2-Blade polarized
type cord set
Fig. 1 AC Leakage Test
