Icom ic-r20 Service Manual page 45

Aug. 2009
REC UNIT
76
P12/D10
77
P11/D9
78
P10/D8
D7 79
P07/D7
D6 80
P06/D6
D5 81
P05/D5
D4 82
P04/D4
D3 83
P03/D3
D2 84
P02/D2
D1 85
P01/D1
D0 86
P00/D0
87
P107/AN7/KI3
88
P106/AN6/KI2
89
P105/AN5/KI1
90
P104/AN4/KI0
91
P103/AN3
92
P102/AN2
93
P101/AN1
94
AVSS
95
P100/AN0
96
VREF
97
AVCC
98
P97/ADTRG/SIN4
99
P96/ANEX1/SOUT4
100
P95/ANEX0/CLK4
C4
0.01
R15 R19
R8
47k 47k 47k
R10
HJ1
47k
SUB_3V
1
CNVSS CNVSS
2
RESET R E S E T
3
TXD TXD
4
RXD RXD
5
SCLK SCLK
6
BUSY BUSY
7
GND EPM
8
EPM
9
R1
10k
IC1
IC10 R9 C6
10k 33p
BD5228G
R1111N321B F
VBUS 1 5 1 OUT
5
VDD VOUT CD
2 2 VDD
GND
3 4 3 VSS
4
CE NC NC
C2 C3
C5
10 0.01 0.01
VBUS VBUS
J2
9 8 EP3
5
4
from/to
D+ R6 27
3
USB jack
D– R7 27
2
VBUS VBUS
1
7 6
EP1
EP4
C1
0.01
C11
0.01
50
P42/A18
49
P43/A19
48 CS0
P44/CS0
47 C S 1
P45/CS1
46 CS2
P46/CS2
45 SUB_3C
P47/CS3
44 WR
P50/WRL/WR
43
P51/WRH/BHE
42 RD
P52/RD
41
P53/BCLK
40
P54/HLDA
IC2
39 EPM
P55/HOLD
38
M30622M6P-131GP P56/ALE
SUB_3V
37
P57/RDY/CLKOUT
A_SQL
36
P60/CTS0/RTS0
B_SQL
35
P61/CLK0
SUB_RX
34
P62/RXD0
SUB_TX
33
P63/TXD0
32 BUSY
P64/CTS1/RTS1
SCLK
31
P65/CLK1
RXD
30
P66/RXD1
TXD
29
P67/TXD1
28
P70/TXD2/SDA
27
P71/RXD2/SCL
26
P72/clk2/TA1OUT
CNVSS
R E S E T
TXD
RXD
SCLK
BUSY
EPM
P W R E N P W R E N
R12 330
R X F R X F
X1 CR-672
T X E T X E
6.000 MHz
C12
0.01
C7
C10
33p 0.1
RSTO
V B U S V B U S
R11
C8
470
0.1
1
24 D1
EESK D1
2
23 D2
EEDATA D2
VBUS 3
22 D3
VCC D3
IC3
VBUS 4 21 D4
RESET# D4
5 20 D5
RSTO# FT245BL D5
6 19 D6
R13 1.5k
3V3OUT D6
7 18 D7
USBDP D7
8 17
USBDM GND
C9
0.033
TXE TXE
RXF RXF
PWREN PWREN
C15
0.01
10
11
12
13
14
15
16
17
18
19
C S 1 20
21
22
C13
23
0.01
24
WR 5
1 A
VCC
CS2 2 B
4
3 GND C14
Y
0.01 K9F5608U0D-PCB0
IC4
SN74AHC1G02DCK
R21 R22
100k 100k
RD 1 A 5
VCC
CS2 2 B
3 GND 4
Y
IC5
SN74AHC1G32DCK
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
R_B
RESET
+3V
SUB_3C
SUB_RX
SUB_TX
SUB_3V
3.0V
Q2
C27
100
UNR921NG0
A_SQL A_SQL
B_SQL B_SQL
D0 D0
D1
D2
D3
D4
D5
D6
D7
Explanatory notes
REC UNIT
1 48
NC NC
2 47
NC NC
3 46
NC NC
4 45 D0 1
NC NC D0
5 44 D7 D1 2
NC I/O7 D1
6 43 D6 D2 3
GND I/O6 D2
7 42 D5 D3 4
R/B I/O5 D3
8 41 D4 D4 5
RE I/O4 D4
9 40 D5 6
CE NC D5
39 D6 7
NC NC D6
38 D7 8 IC7
NC NC D7
37 9
VCC VCC DVDD ML2302TBZ03A
36 10
VSS VSS TEST2
35 11
NC NC TEST3
34 12
NC NC TEST4
33 13
CLE NC TEST5
32 D3 14
ALE I/O3 TEST6
31 D2 15
WE I/O2 TEST7
30 D1 16
WP I/O1 TEST8
29 D0
NC I/O0
28
NC NC
27
NC NC
26
NC NC
25
NC NC
IC6
C16
0.01
C17
18p
R16
C19
470k
0.01
R17
150k
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
3.1V
RESET
SUB_3C
VOL_UP_DOWN
R20
SQL
100
CPU_TX
CPU_RX
A_AIN
C28
B_AIN
0.01
C25
Q1
0.01
1 5
2
3 4
UNR921NG0
A_SQL
IC8
SN74AHC1G66HDBV3
D0
D1
D2
D3
D4
D5
D6
D7
B_SQL
S Q L
VOL_UP_DOWN
R18
330k
VOLTAGE LINE RECORDING LINE
RECORDING/PLAYING PLAYBACK LINE
COMMON LINE
*: Refer to the PARTS LIST for the value and name of component.
25
X2 CR-708
16.384 MHz
C21
C20
22p 22p
48 RD
RD
47 WR
WR
46
DVDD
45 FUL
FUL
44 MID
MID
43 EMP
EMP
42
CH
41 CBUSY
CBUSY
40 RESET
RESET
39 FIFOST
FIFOST
38
DGND
C23
37
VR
1
36
CB1
35
CB2
34
SPVDD
33
AVDD
C22
C24
0.01 1
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
RESET
J7
+3V
1
SUB_3C
2
VOL_UP_DOWN
to
3
SQL
LOGIC unit
4
CPU_TX HJ9
5
CPU_RX
6
J6
A_AIN
1
B_AIN to
2
AOUT AOUT LOGIC unit
3
HJ8
GND
4
C26
0.01
5
1
2
4 B_SQL
3 C18
0.01
IC9
SN74AHC1G66HDBV3
S Q L
S1
VOL_UP_DOWN
S2
SQL
UP
S3
DOWN