Philips BDL4221V/00, Service Manual

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19
420WN6 LCD TV
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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.
1
.
1
All mains operated products must pass the Hi-Pot test as
described in this instruction.
1
.
2 T
his test must be performed again after the covers have
been refitted following the repair, inspection or modification
of the product.
2
.
1 C
onnecting conditions
2
.
1
.
1 T
he 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
T
he mains switch(es) must be in the "O
N
" position.
2 . 2 T est Requirements
All products should be HiPot and Ground
C
ontinuity tested as
follows:
T est 2 8 20VDC 1 7 00VDC T est current:
voltage (
2000V
A
C
) (
1200V
A
C
)
2
5A,A
C
T
est time:
T est time 3 seconds 1 second 3 seconds(min.)
(min.) Resistance
required:
T rip set at 100 uA 5 mA <= 0 . 09 +Rohm,
current for Max. R is the
(
T
ester) limitation; set resistance of
at 0 . 1 uA for the mains cord.
Min.
L
imitation
Ramp set at
2
time seconds
( T ester)
T
est method
C ondition HiPot T est for HiPot T est for Ground C ontinuity
products where products where
T
est requirement
the mains input the mains input is
range is Full 110V A C (USA
range(or
220V
type)
A C )
2
.
2
.
1 T
he minimum test duration for Quality
C
ontrol Inspector
must be
1
minute.
2
.
2
.
2 T
he test voltage must be maintained within the specified
v 5%.
2
.
2
.3
T
here must be no breakdown during the test.
2 . 2 . 4 T he grounding blade or pin of mains plug must be
conducted with accessible metal parts.
3.
Equipments and
C
onnection
3. 1 . Equipments
For example :
-
C henHwa 90 3 2 PROGRAMMAB L E AU T O SAFE T Y
T ES T ER
- C henHwa 5 10 B D igital Grounding C ontinuity T ester
-
C
henHwa
901
(A
C
Hi-pot test),
902
(A
C
,
DC
Hi-pot test)
W ithstanding T ester
3.
2
.
C
onnection
4.
R
ecor
din
g
Hipot and Ground
C
ontinuity testing records have to be kept
for a period of 10 years.
*
T
urn on the power switch of monitor before Hipot and
Ground C ontinuity testing.
C
o
nn
ect t
h
e
"
v
id
eo ca
bl
e
"
or
"
gro
undin
g
s
cre
w"
to t
h
e
CLIP
o
n y
o
u
r te
s
ter
.
Vid
eo ca
bl
e
(Rear view of monitor)
C
o
nn
ect t
h
e po
w
er cor
d
to t
h
e
m
o
ni
tor
.
Grounding screw
P
o
w
er o
u
t
l
et
(ChenHwa 9032 tester)
C lip
Clip