Philips PM2517E - Display Constant

12
6.3-
ADC
I
I
L.
t
t
t
L
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L
?
t
t
r
L
t
t
T
t
t
t
t
t
t*
t
t'
r
6.3.1.
Display
conslant
0OOO
No. From
l,4easurement
lMeasuring
points
Measuring
data
Correct
Incorrect
InPul
signal
supp
red
drrectly
to ADc
Display
Input
voltage;
b i 90mV
c. r 900fiV
Suppliecl toi ADC
Hi= R108
nqhl hand
srde
Rangei
a.b.
999 9mV
c. I99gv
a. 10000 mV
b.
t 90.00 mV
c
a 9.000 V
Reler
to B
I
Data
srgna OO0059
(D
101)
Hi
=
D10l/14
Lo
=
0 socket
+
With
oscrlloscope
Inpul
vollagei
+ 90'nV
su
pp
ied to
ADC
a. AsSymelfical
block
vo raqe
b.
Symelfica block
vo
rage
c
No
s
g
nal
a. Refer to
C
c
B Dala ho
d DH
oo0059
(Dr01)
t-t
=
D101i 18
Logc0(-85V)
Fefer to
D
D
c Data hold
DH
OO0055
(D703)
Hr
=
D703/1
Loqic 0l-
I5V) Reler
lo E
Deiect O00055
rn
DH
lrne
E
D Dala hold
DH
OO0059
(D
101)
Connect
Dr01/18
to
-8.5V
(C802
-
)
a
Instrurnenl
I
u
nc
lrons
aqa
n
Elror still n
b
a.
Track Interruptron
n
DH
line
b
Delecl OO0059
C Autozero
AZ
OQ0059
(D
r
01)
Hi=
0101/15 AZ
Hl=
0101i 16 AZ
Wrlh
osc oscope
200m
sec
az
j-l-J
o-
e.sv
AZLJ
|
85V
Reler lo
G
Deiecr
OO0059
G
AUIO ZETo AZ
on FET
v1o2/vr
02
I
H
= qate
vt0l/v101
W lh oscrlloscope
InPut vollage;
supplred
lo ADC
+ 90mV and
+ 900mV. refer
to A
200m sec
az
l-l_l
G or
B
0
a 90 mV n range
99.99mV
b.900mV rn.ange
9
999V
Deleci
O00059
Check R504
Ctreck tracks
rET
vtorttor
l
H
I
Convers on resistors
Ra
and Fb
ol
000064
(A102)
a.414214t11
b.4102i9/6
b
:10k4
Defecl
OQ0060
(4101)
Delecl resLSlors
B Track
A10l/15
lo
D 101/14
4101/15
-
D10t/14
Shortc
rcurl
to
or
-
8.5V supply
Shortclrc!]rl
lnpur
of ADc
Swilchrng
part
000060
(ar0r)
Hi
-
Al0li12
Lo
=
+ 8.5V
(C804
+
)
-26V.
.
-3.2V
Both
srgnals
shou d
be equal
Defecl
OQ0060
J
Data outpul
000060
(4r01)
Hi
=
4101/15
Wilh oscilloscope
Load Al01/15
wrlh
The multimeter
should
a ranqe
(PM2503)
The measurements
wiih
lhe
rnultimeter
the data
slgna
Defect
OO0060
L
Source voltage
oi
FEr
v
fi2t1o21
Hi
=
Al02/5 (Vt
02)
Hi
=
ar02/io (vto21)
Lo
=
o.sockel
ü
+0.4V... +3V
Eolh slgnals
sholr
ld
Defect
000064
Delecl
O0006a
-V
soLrrce
:
Vdrarn
Delect V
102/1021