Philips PM2517E - No or Incorrect Power

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6.1. POWER SUPPLY
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6.1.1. No
or incorrect
power
No. From
Measurement N4easuring
points
Measuring data Correct
tncorrect
Supply
voltage
+ an
-
(across
C804, C802)
Hi
=
C804
(+
)
Hi=c802
(_)
Lo= o-socket
+
+8V.... +9V
-8V.... rgv
Power supply okay Eoth
1ncofiecl,
Reter lo
B-
Reler to H
Ripple on the supply
voltage
+ and
-
Hi=c804
(+)
Hi=
c802
,
(-)
Wilh oscilloscope
< 10mv Reler to c Feler lo E
c. B
Too high
or loo
low
suppry
vorlage
Hi
-
c804
(+
)
H
=
C802
.
(-)
Lo
=
o'sockel
+
>+9V <+8V
>-9V <-8V
> Reter to
D
D, c Convertor frequency
(Supply
voltage
> +9V, >-gV)
Hi=
Coll
V802
Lo
=
o-socket +
Wrlh
oscllloscope
Vary the
battery
voltage belween
6 and
9V
ext.
Changing
ot frequency
Normal al 9V exl
of
6V batt
=160kHz
-9V
When
varying Vball.
lhe trequency
should
change
V850
delecl
V801 detect
or R802 lo small
(560k4)
B Ripple
on supp
y
voltage >10mV
Hi
=
C804
(+
)
Lo
=
o-sockel
ü
Wilh
oscilloscope
50 Hz
80....100kHz
4Hz
100
Hz
Delect
n
power
supply
Delect
n
control
clock,
refer
to 6.5.
Delect
rn
AZ signal
reler to
6.5.
Oelecl
in
display
control,
refer to
6.5.
c Converlor
frequeflcy
(Supply
voltage
<
+ 8V,
<-8V
Hi=C804
,
(+)
Wiih oscilloscope
Vary ihe batlery
voltage belween
6 and
9V
ext.
Changlng ol
lrequency
Normal at 9V exl or
6V
batt
n n
*9v
-fttr
=160kHz
-
"-gv
When varying V batl.
should change
Delect V850
Reter to
G
G. Voiiage
over R803/804
R803 or R804
R803:165mV
--
a 25%
R804=265mV: ! 25%
Too
small:
Check; R801, V852,
V801 or
Trackinte(uption
Too lar96:
ihe
Lnstrument.
e.g. One LED
lights
+ V sripply not
present
-
V SUPPJY
=Vball
Hi=
c804
(+
)
Hi=c802
(-)
Lo
=
O.socket
+
+ V supply
nol
presenl
-
V
suPPlY
:Vbatt
Converlor
s nol
running.
Check; R802
v802
and
T801