Service manual

MD-R2
– 29 –
Figure 29 BLOCK DIAGRAM (2/2)
LINE IN
J101
IC101
NJM4560D
OPE AMP
+7V
+7V
-7V
-7V
REC VOL
VR901
SYSCLK
AD DATA
LRCLK
BLCK
DA DATA
MODE
CLK
DATA
Q601 Q602
IC501
REGULATOR
S81233YK
J301 DIGITAL -IN (COAXIAL JACK) RX302 DIGITAL IN (OPTICAL JACK) TX302 DIGITAL OUT (OPTICAL JACK)
IC301
74HCU04
INVERTER
IC302
NAND GATE
74HC10AP
DIGITAL IN
MD UNIT
DIGIN VCC DIGITAL OUT
Q503
A-7V POWER CIRCUIT
MD+ POWER CIRCUIT
5V SYSTEM POWER CIRCUIT
BACK UP 5V
DIGITAL 5V
MD 5V MD+
S-ID,SYN,RESET,DSTB,DSCK
K-DATA,MD DATA
FL DISPLAY +B
FL901
~~ ~~
DIG SEG
JOG
KEY
RX-IN
IC901
IX0237AW
SYSTEM
MICROCOMPUTER
MD
MUTE
SW901
JOG
SWITCH
KEY IN
BLOCK
UN970 REMOTE SENSOR
FL VP(-31V)
A/D +5V
BACK UP +5V
FL
POWER
CIRCUIT
FL VP(-32V)
FL DISPLAY +B
RECTIFYING CIRCUIT
F551
1A
F552
1A
T551
POWER TRANSFORMER
AC 120V
60Hz
HEADPHINES
J981
H.P.VOL
VR981
IC651
NJM4560D
OPE AMP
Q451 Q452
MUTE
J101
LINE OUT
3
4
5
1
7
8
3
5
12
19
16
13
15
24 26
10
2
3
4
5
1 7
2
1
3
8
3
4
5
1
7
8
6
1
2
8
10
13
17
21
21
42
60 89
45
90
92
97
2 3
6
32
10
33
96
91
100
~
~
+7V
-7V
IC201
UDA1340
AD/DA 
CONVERTER
IC601
LINE AMP.
NJM4580D
Q502
Q506
Q504
A+7V POWER CIRCUIT 
3V
~