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AX-EQSTN
M PCM1700U (IC657):
Digital to Analog Converter
1. Internal Block Diagram
-Vee[9 |
[3 |D.GND
SERVO 0C(L) [10]
MSB ADJ(L)
,
[6 | Veor
nc [19]
[5 | SERVO DC(R)
BPO OC(L) [12|
| 4 | MSB ADJA)
Lourtt) [13]
BPO DC(R)
A. GNo [14]
12 Jt our(R)
sa)
A.GND
Vourl
S.4(R)
NC
V our(R)
+Vaa
Serial to parallel
Serial to parallel
NC
DATA) [30]
Shift Registor
Shift Registor
nee
Mi /PD6376 (1C658) : Digital to Analog Converter
1. Internal Block Diagram
ara fs SEL} —>
'
D.GNO Z-—>
1
NC QNOQQ
AGNO
ANOD
1-12 (No. 20279)
AX-E9STN
HE LA2730 (1C505) : Dolby B type Noise Reduction
1. Terminal
Layout
2. Block Diagram
OUTPUT AMP OUT
OUTPUT AMP GAIN
SUMMING
AMP OUT
BUFFER OUT
SUFFER IN
INPUT AMP GAIN
INPUT AMP IN
Mi TC74HC154AP (1C901) : Decoder
1. Terminal layout & Block diagram
2. Functions table
Input
Selected
foi {@z|o
| c fala | OM
cy
ei
uP
etude
YO
Lye
Pey]|ty]uyH
YT
Ly}
bye]
eyHyec
Y2
L
L
L
L
H
H
Y3
L
L
L
H
L
L
Ya
L
L
L
H
L
H
¥5
L
L
L
H
H
L
Y6
L
L
L
H
H
H
Y7
Lye
H]eLyede
'Y¥8
L
L | H
L
tL
tH
YS
L
L
H
L
H
L
YIO
L
L
H
L
H
H
YT
L
L
H
H
L
L
YT2
L
L:
H
H
L
H
YT
L
L
H
H
H
L
YT4
L
iL
H
H
H
H
YTS
x
H
x
H
x
x
x : Don't care
(No. 20279) 1-13
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