Philips 240PW9EB/69, Service Manual

Page: 90 / 92

86
220BW8 plus LCD
Safety Test Requirements
All units that are returned for service or repair must pass the
original manufactures safety tests. Safety testing requires both
Hipot and Ground Continuity testing.
HI-POT TEST INSTRUCTION
1.Application requirements
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. Test method
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:
2.2.1 The minimum test duration for Quality Control Inspector
must be 1 minute.
2.2.2 The test voltage must be maintained within the specified
v 5%.
2.2.3 There must be no breakdown during the test.
2.2.4 The grounding blade or pin of mains plug must be
conducted with accessible metal parts.
3. Equipments and Connection
3.1. Equipments
For example :
- Zentech 9032 PROGRAMMABLE
AUT O SAFETY
TESTER
3.2. Connection
4. Recording
Hipot and Ground Continuity testing records have to be kept
for a period of 10 years.
* Turn on the power s witch of monitor before H ipot and
G round C ontinuity tes ting.
C onnect the clip to the monitor.
C lip
(R ear view of monitor)
C onnect the power cord
to the monitor.
P ower outlet
(Z entech 9 032 tes ter)
Condition Hi-Pot Test for
products where
the mains input
is 220V AC
Hi-Pot Test for
products where
the mains input
is 110V AC
Ground Continuity
Test requirement
Test
voltage
2820VDC
(2000VAC)
1700VDC
(1200VAC)
Test time 3 seconds 1 seconds
Trip current
(Tester)
Set at 100uA for
Max limit;
Set at 0.1uA for
Min limit.
5mA
Ramp time
(Tester)
Set at 2 seconds
Test current:
25A, AC
Test time:
3 seconds
Resistance required:
<=0.09+Rohm,
R is the resistance
of the mains cord.
90
240PW9 LCD