Philips 170C4FS/00, Service Manual

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18
170C4/N4
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Safety Test Requirements
All units that are returned for service or repair must pass the
original manufactures safety tests. Safety testing requires both
and testing. Hipot Ground Continuity
HI-POT TEST INSTRUCTION
1. Application requirements
2. Test method
1.1 All mains operated products must pass the Hi-Pot test as
described in this instruction.
1.2 This test must be performed again after the covers have
been refitted following the repair, inspection or modification
of the product.
2.1 Connecting conditions
2.1.1 The test specified must be applied between the parallel-
blade plug of the mainscord and all accessible metal
parts of the product.
2.1.2 Before carrying out the test, reliable conductive
connections must be ensured and thereafter be
maintained throughout the test period.
2.1.3 The mains switch(es) must be in the "ON" position.
2.2 Test Requirements
All products should be HiPot and Ground Continuity tested as
follows:
Test 2820VDC 1700VDC Test current:
voltage (2000VAC) (1200VAC) 25A,AC
Test time:
Test time 3 seconds 1 second 3 seconds(min.)
(min.) Resistance
required:
Trip set at 100 uA 5 mA <=0.09+R ohm,
current for Max. R is the
(Tester) limitation; set resistance of
at 0.1 uA for the mains cord.
Min. limitation
Ramp set at 2
time seconds
Condition HiPot Test for HiPot Test for Ground Continuity
products where products where Test requirement
the mains input the mains input is
range is Full 110V AC(USA
range(or 220V type)
AC)
2.2.1 The test with AC voltage is only for production purpose,
2.2.2 The minimum test duration for Quality Control Inspector
must be 1 minute. No breakdown during the test.
2.2.3 The test voltage must be maintained within the specified
v 5%.
2.2.4 The grounding blade or pin of mains plug must be
conducted with accessible metal parts.
Service center shall use DC voltage.
3. Equipments and Connection
4. Recording
3.1. Equipments
For example :
- ChenHwa 9032 PROGRAMMABLE AUTO SAFETY
TESTER
- ChenHwa 510B Digital Grounding Continuity Tester
- ChenHwa 901 (AC Hi-pot test), 902 (AC, DC Hi-pot test)
Withstanding Tester
3.2. Connection
Hipot and Ground Continuity testing records have to be kept for
a period of 10 years.
* Turn on the power switch of monitor before 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
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