Philips 241B4PYCB/00, Service Manual

Page: 84 / 87

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 main scord 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:
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
ʳ
Test current:
25A, AC
Test time: 3
seconds
Resistance
required:
<=0.09+Rohm,
R is the
resistance of
the mains
cord.
91 220CW9
LCD
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
* Turn on the power switch of monitor before Hipot
and Ground Continuity testing.
4. Recording
Hipot and Ground Continuity testing records have to
be kept for a period of 10 years.
84 241B4LPY LCD