MDS-JB980
40
40
6-3. BLOCK DIAGRAM — MAIN SECTION —
X509
11.2896MHz
–1
–2
LED DRIVE
Q755
ROTARY
ENCODER
FL DRIVE
Q781, 782
D756
(STANDBY)
A/D, D/A CONVERTER
IC500
ADDT
DADT, BCK,
LRCK
MUTING
Q121,221
MUTING
CONTROL SWITCH
Q151
OSC
J101
-1
-2
-3
-4
RV801
PHONE
LEVEL
RV760
REC
LEVEL
D152
D151
J802
PHONES
R
L
ANALOG IN
ANALOG OUT
AC IN
RELAY
+5V
AC
(TO FL781)
TR901
POWER
TRANSFORMER
UNREG +12V
RECT
D451
RECT
D421,422
RECT
D443,444
RECT
D441, 442
79, 80, 1,2
39 – 60
3 – 37
S01 – S35
S36 – S39
G23
G24
G01 – G22
FLUORESCENT INDICATOR TUBE
FL781
MUTING
Q801,802
DADT
BCK
LRCK
GND
SW
l
AMS
L
S713
S701 – 706, 711, 712,
S714,716.717,721-725,
S731-733
A
B
SWDT
SCLK
INV.
IC202
SWDT, SCLK
DIN1, LRCKI,
DATAI, XBCKI
S751
TIMER
•
SIGNAL PATH
X15
10MHz
REC
OFF
+3.3V
PLAY
19
21
62
61
73
LED DRIVE
Q758
D758
(SF EDIT)
LED DRIVE
Q759
D759
(MD LP)
75
72
81
DIN1
2
4
LRCKI
XBCKI
DATAI
5
4
1
3
ROTARY
ENCODER
A
B
1
2
–39V
(FL DRIVER (IC771) B–)
RELAY
+5V
RECT
D431,432
RECT
D401,402
RECT
D411-414
RELAY +5V
REGULATOR
Q411
TR950
POWER
TRANSFORMER
RELAY
DRIVE
Q911
IC681
WAVE
SHAPER
IC406
RESET
D404
+3.3V
(SYS)
+3.3V
(BACKUP)
D406
D405
BT404
LITHIUM
BATTERY
CN404
VD +5V
+5V
+6V
-6V
+3.3V
REGULATOR
Q471
IC421
+5V
REGULATOR
VT +3.3V
X201
12MHz
47
46
D201
CN203
USB
1
2
3
4
L
R
LED DRIVE
Q757
D757
(FILTER)
74
KEYBOARD
OFF SWITCH
Q805
J801
KEYBOARD
+5V
DATA
CLK
6
4
3
2
1
5
BUFFER
Q803,804
BUFFER
Q801,802
: PLAY (ANALOG OUT)
: REC (ANALOG IN)
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