Technical data

Go to cover page
Magnavox LCD TV
92
All units that are returned forservice orrepair must pass the
originalmanufactures safety tests. Safety testing requires both
and testing.Hipot Ground Continuity
HI-POT TEST INSTRUCTION
1.Application requirements
2.
1.1 All mains operated products must pass the Hi-Pottestas
described in this instruction.
1.2This test must be performed againafter the covers have
been refitted following the repair, inspection ormodification
of the product.
2.1 Connecting conditions
2.1.1 The test specified must be applied between the parallel-
blade plugofthemainscord and all accessible meta
l
parts of the product.
2.1.2 Before carrying out the test, reliable conductive
connectionsmustbeensured and thereafter be
maintained throughout the test period.
2.1.3 The mains switch(es) must be in the "ON" position.
2.2Test Requirements
All products shouldbeHiPot andGround Continuity tested as
follows:
Test 282
0VDC 1700VDC Test current:
voltage(2000VAC)(1200VAC) 25A,AC
Test time:
Test time 3 seconds 1 second3seconds(min.)
(min.) Resistance
required:
Trip set at 100 uA 5 mA <=0.09+Rohm,
currentfor Max. R is the
(Tester) limitation; set resistance of
at0.1uAforthemainscord.
Min. Limitation
Ramp set at 2
time seconds
(Tester)
Test method
Condition HiPot Test forHiPot Test forGround Continuity
products where products where Test requirement
the mainsinput the mainsinput is
range is Full 110V AC(USA
range(or 220V type)
AC)
2.2.1 The minimum test duration forQuality ControlInspector
mustbe1minute.
2.2.2The test voltagemustbemaintained within the specified
voltage+5%.
2.2.3 There must be no breakdown during the test.
2.2.4 The grounding blade orpinofmainsplug must be
conducted with accessible metalpa
rts.
3. Equipments and Connection
3.1. Equipments
Forexample :
- ChenHwa9032 PROGRAMMABLEAUTO SAFETY
TESTER
- ChenHwa 510B DigitalGrounding Continuity Tester
- ChenHwa901 (AC Hi-pot test), 902 (AC, DC Hi-pot test)
Withstanding Tester
3.2. Connection
4. Recording
Hipot andGround Continuity testing records haveto be kept
for a period of10years.
* Turnonthe power switch ofmonitorbefore Hipot and
Ground Continuity testing.
Connect the "video cable"
or "grounding screw"
to the CLIP on your tester.
Video cable
(Rear view of monitor)
Connect the power cord
to the monitor.
Grounding screw
Power outlet
(ChenHwa 9032 tester)
Clip
Clip