Philips PM2517E - One 7. Segment LED Is Blanked; One Segment of All Leds Is Incorrect; Two 7. Segment Leds Are Blanked

I
l
l
l
l
l
l
l
lf
l
j
l
11
6.2.5.
Two 7. segment
LED'S are
blanked
6.2.6.
One 7. segment
LED is btanked
B Diqit Selecl OS
1i2
o00059
(Dr0r)
H1= D101i I
{DSl)
Hi= D101/2
(DS2)
With osc loscope
-l T'1 l-1 T
0
J LJ U LJ
-85V
=500H2
-0
J
l-J L
asv
=25AHz
Feier to I
Reier lo G
G Clock
OO0059
(D101)
Hr
=
D101/13
Wilh oscilloscope
-
8.5V
80
120k Hz
Heler 1o H
No srgna
Träckinterruption
Ar01/2. Dr01/13
G Supp
y
voltage
oo0059
(D101)
H
=
D10t/12
(_
)
-8V...9V
Deiecl OO0059
Supply voily voltage
oQ0059
(D
r
01)
Hi=D101/12(-)
-8V... -9V
Delecl OQ0059
Supp
y
vollage
\o702)
Hr= D702i8
-8V -9V
Delecl
D702
lo. From lvleasurement
l\y'easuring
points
lMeasuring
data
Correct
Incorrect
Drgit Select
DS
1/2
o00059(D10r)
H
=
0101i
1
(DS1)
Hi= D101/2
(DS2)
W lh oscilloscopc
-FFF.o
J
LJ lJ
Ll U
-s5y
=500H2
t-t r-t f
o
85V
-250H2
Reier ro
I Deiect O00059
B
Drgit Select
DS1/2
HEF 4555
(DS702)
Hi=
070212
(DS1)
Hi= D702l3
(DS2)
Wilh oscL oscope
fll-Lflf'u
1uuu
=500H2
f-LJ-l_['-usu
-.25OHz
Defect
D702
No.
From
Mgasurement
i/easuring
points
lvleasuring
data
Correct Incorrect
V
bais o1 lhe cathode
swrlches ol the LED
s
concernrnq
Hr=
bars V701/7021703
ot V7O4
Wrth oscilloscope
BIock signar.:3Vp.p
Drv
sron of the sigoals
DSl and
0S2
Reler
lo
Fig.25
Delect transistor
v70117021703
or V7A4
Reler to
B
B
Oulputs of HEF
4555
tD7A2)
Hi
=D742t4t516
at 7
Wilh oscilloscope
B ock
srgnal.
=8vpp
Divrsion
ot slgnals
DSl and
DS2
Fefer lo Fig.25
R715171617lf
ot
R718
Track inte(upl
on
Deiect D702
6.2.7.
One
segment
of all LED'S is incorrect
io. rom
l\y'easurement
lvleasuring
points
l\.4easuring
data
Correct Incorrect
LED segment
Drsplay
Conslant
lrghting
0elect D701
B
LED segmeni
Display
Conslanl mi5s ng
Reler lo
C
c
outpur
oi HEF 4511
(D701)
Coresponding oulput
la/g)
Hi=o701i9..15
W lh oscilloscope
Elocksrgna 8Vp.p.
Drvision ol signals
40.41, 42. A3
Refer
lo Frg.25
Defecl
res
stor
R703i 709
Track nterruption
Deiect D701
6.2.8.
One
segmenl
ol one LED
is missing