Apr.2002
OD-20(T)
BLOCK DIAGRAM
fig.block
INPUT
DC IN
OUTPUT
AMP CTRL
LINEOUT/PHONES
IC2
CODEC
IC3
AMP
FET SW
Q2
Q8
FET SW
BUFFER
Q3
AMP,LPF
IC11
TR SW
Q4,Q5,Q7
IC6
CPU
RESET
IC7
IC5
DSP
COMPARATOR
IC10
Q10
FILTER
IC8
DC-DC CONVERTER
Q11,
EEPROM
IC4
BUFFER
Q1
PRE EMPHASIS
AF/AD
IC1
BUFFER
Q12
DE EMPHASIS
BATTERY
CN4
TR SW
TR SW
Q6
Q9
-9V
CN3
CN5
WIRING 10P
WIRING 15P
CN1
CN2
CN1
CN2
VR1,VR2,VR3,VR4
VR5,VR6,VR7
SW1,SW2,SW3
SW4,SW5,SW6
LED1,LED2,LED3,LED4
LED5,LED6,LED7,LED8
LED9,LED10,LED11,LED12
RIBON CABLE
PANEL BOARD
JACK BOARD
3pin
+
A
9
+
D 3. 3
JK1
1
2
3
JK2
1
2
3
JK4
1
2
3
JK3
1
2
3
JK5
2
1
3
X2
11.2896MHz
1
2
X1
8MHz
1
2
1
2
3
1
2
1
2
16
17
Summary of Contents for OD-20
Page 3: ...3 OD 20 T...
Page 6: ...6 Apr 2002 EXPLODED VIEW fig expro1 33 32 26 24 c k 21 b d 23 25 b e f...
Page 7: ...7 OD 20 T fig expro2 a 11 18 a 12 18 11 16 j 14 15 17 10 13...
Page 8: ...8 Apr 2002 fig expro3 1 2 5 3 i 4 g h RIGHT SIDE LEFT SIDE 9 6 7 8...
Page 17: ...18 Apr 2002 CIRCUIT BOARD JACK Circuit_Jack 1 eps Circuit_Jack 2 eps...
Page 18: ...19 OD 20 T CIRCUIT BOARD PANEL Circuit_Panel eps...
Page 21: ...24 Apr 2002...
