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Sony IT-A4000 Service Manual page 33

Integrated telephone answering machine

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4-5. SCHEMATIC DIAGRAM
— KEY BOARD SECTION —
-See page 29 for IC Block Diagram.
1
2
3
4
5
{KEY BOARD]
9
10
11
12
13
14
|
15
LCD]
(1TM370)
ANNOUNCE
-
TRANSFER
|
aM | STOP
PLAY
c
2a
.
.
i ee
rete
=
ae
DBI
cr
(¥)
|
(ANSWER)
2816
CL=140R (—p)
R833
D
=e
68
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= hess
bie
a R836
560
yi
560
560
560
cut atye @
23
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€907
C908
R913
VOICE SYNTHESIZER
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aie
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[ANSWER] (RecaLT)
:
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S809
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S820
S82 |=
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S823
S824-—5
3]
A2B
VOICE SYNTHESIZER
d
Lt
a
8402
$B007-03CP
100y
0.15
30p
30p
22k
6.3V
|
D922
RDS.IED
TP850 9
TP851
o
TP852 o
3
17
CNBO3
m f
Back uP PoweR2 | 7
pice cs
|
ice
BATA
BATA
| 3 |
:
+9
fi |
a
Tpeot
cNaO!
es
pte 2
an
See Ong
LINE-LE®
ANSWER-LED
pice
cs
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phos
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MAI
o
MAS__QTP836
MA4 TP8370
R
SYNT-LATCH
SYNT-START
BUSY
RESET
CcOLs
1c902
15PIN
V8B
1¢902 7PIN
HF
$840
2PIN
O8PR
S840
4PIN
P/T
10902
Z1PIN
MUTE
10902 23PIN
OP
Ninf
_ ~
BIMF
n 4
N N NIN
[DS
w =a
BILAN
AJ =
iIT- A4000
20
21
22
Note on Schematic Diagram :
eAll capacitors are in
uF unless otherwise noted. pF: wu uF
50WV
or less are not indicated except for electrolytics and
tantalums.
eAll resistors are in Q and
'"% W or less unless otherwise
specified.
e
% _ : indicates tolerance.
Note :'The components identified by mark A or dotted line
with mark A\ are critical for safety.
Replace only with part number specified.

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