Philips PM2521 Service Manual page 181

9
10.4.
Test
1
(visual
L.C.D. test,
no
S.A.)
This test is a visual
L.C.D. test
which
fills
the
display,
segment after
segment.
If
all
segments are
lit
the
display
becomes empty and the whole
measuring sequence
starts again.
Only
when
all
segments are
lit
can the test
be stopped by short circuiting
TP10 and TP1
1
.
When
a
connections are short circuited
then the segments will light
simultaneously.
NOTE:
1.
Testrom placed
in
D
1909
socket (Both
ROMs
removed)
2.
Short
circuit
TP
10
and TP
11
3. Reading
on
display:
AH
segments
will
be
filled.
ST3A73
820301
CONNECTION TABLE
CONNECTIONS
D2901 D2902 D2903
D2901 LX-display
D2902 LX-display
D2903
LX-display
Output
no.
Pin no. Char. Pin no. Char.
Pin no. Char. Pin no.
01 9 2 .3
22 a5
42
02 10 __ 3
d3 23 b5
43
03
11
+ 4 e3
24
g5
44
04
12
GATE
5 f3
25 c5
45
05
13
.1
6
a3
26
M
(Hz)
46
06 14 d1 7 b3
27 k (Hz) 47
07
15 el 8 g3
28
Hz 48
08 16
f1
9 c3
29 Z 49
09
17 a1
10
.4
30
s
50
O10 18 b1 11 d4 31
V
51
Oil
19 gi
12 e4 32
A
52
012 20
cl
13 f4
33
*
53
013
21
.2
14 a4 34
m
54
014
22 d2 15
b4 35 55
015 23
e2
16
g4
36
°C 56
016 24 f2 17 c4
37 57
017 25
a2
18
.5
38 k
(12)
58
018
26 b2 19
dB 39
M
(12)
59
019 27
g2
20 e5
40
n.c.
-
020
28 c2 21 f5
41
n.c.
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