Rec Unit - Icom ic-r20 Service Manual

11-3 REC UNIT

76
P12/D10
77
P11/D9
78
P10/D8
D7 79
P07/D7
80
D6
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 RESET
3
TXD TXD
4
RXD RXD
5
SCLK SCLK
6
BUSY BUSY
7
GND EPM
8
EPM
9
R1
10k
IC1
R9
IC10
10k
BD5228G
R1111N321B
VBUS 1
5 1 OUT 5
VDD VOUT CD
2 2 VDD
GND
3 4 3 VSS 4
CE NC NC
C3
C2 C5
10 0.01
0.01
VBUS
J2
9
8 EP3
5
4
from/to
D+ R6 27
3
USB jack
D– R7 27
2
VBUS
1
7 6
EP1
EP4
C1
0.01
C11
0.01
50
P42/A18
49
P43/A19
48
P44/CS0
47
P45/CS1
46
P46/CS2
45
P47/CS3
44
P50/WRL/WR
43
P51/WRH/BHE
42
P52/RD
41
P53/BCLK
40
P54/HLDA
IC2
39
P55/HOLD
38
M30620FCPGP
P56/ALE
37
P57/RDY/CLKOUT
36
P60/CTS0/RTS0
35
P61/CLK0
34
P62/RXD0
33
P63/TXD0
32
P64/CTS1/RTS1
31
P65/CLK1
30
P66/RXD1
29
P67/TXD1
28
P70/TXD2/SDA
27
P71/RXD2/SCL
26
P72/clk2/TA1OUT
CNVSS
RESET
PWREN
R12 330
RXF
X1 CR-672
TXE
6.000 MHz
C12
0.01
C6 C7 C10
33p 33p 0.1
RSTO
VBUS VBUS
R11
C8
470
0.1
VBUS
1
24 D1
EESK D1
2 23 D2
EEDATA D2
VBUS 3 22 D3
VCC D3
VBUS 4 IC3 D4
21
RESET# D4
5 20 D5
RSTO# FT245BM D5
6 19 D6
R13 1.5k 3V3OUT D6
7 18 D7
USBDP D7
8
17
USBDM GND
VBUS
C9
0.033
TXE
RXF
PWREN
11 - 4
CS0
CS1 CS1
CS2
SUB_3C
C13
WR
0.01
WR
RD 1 A 5
VCC
CS2 2 B
3 GND 4
Y
EPM
IC4
SN74AHC1G02DCK
SUB_3V
A_SQL R21
R22
B_SQL 100k
100k
SUB_RX
RD
1 A 5
SUB_TX
VCC
CS2 2 B
BUSY
3 GND 4
SCLK Y
IC5
RXD
TXD
SN74AHC1G32DCK
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
R_B
RESET
TXD
RXD SUB_3C
SCLK
BUSY
EPM SUB_RX
PWREN SUB_TX
RXF
SUB_3V
TXE
A_SQL A_SQL
B_SQL B_SQL
D0 D0
D1
D2
D3
D4
D5
D6
D7
TXE
RXF
PWREN
REC UNIT
C15
0.01
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
4
7 42 D5 D3
R/B I/O5 D3
8 41 D4 D4 5
RE I/O4 D4
9 40 D5 6
CE NC D5
10 39 7
D6
NC NC D6
11 38 D7 8
NC NC D7
12 37 9
VCC VCC DVDD
13 36 10
VSS VSS TEST2
11
14 35
NC NC TEST3
15 34 12
NC NC TEST4
16 33 13
CLE NC TEST5
17 32 D3 14
TEST6
ALE I/O3
18 31 D2 15
WE I/O2 TEST7
19 30 D1 16
WP I/O1 TEST8
20 29 D0
NC I/O0
21 28
NC NC
22 27
NC NC
23 26
NC NC
24 25
NC NC
IC6
C14 C16
0.01 K9F5608U0C
0.01
C17
18p
R16
470k
MP1 MP2
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
3.1V
RESET
+3V
SUB_3C
VOL_UP_DOWN
R20
SQL
100
CPU_TX
CPU_RX
C28
0.01
3.0V
C25
0.01
Q2
C27 Q1
100
UNR9119J
UNR921NJ
IC8
D0 SN74AHC1G66HDBV
D1
D2
D3
D4
D5
D6
D7
B_SQL
SQL
VOL_UP_DOWN
Explanatory notes
VOLTAGE LINE RECORDING LINE
RECORDING/PLAYING PLAYBACK LINE
COMMON LINE
X2 CR-708
16.384 MHz
C20 C21
22p 22p
48 RD
RD
47 WR
WR
46
DVDD
45 FUL
FUL
44 MID
MID
43 EMP
EMP
42
CH
IC7
41 CBUSY
CBUSY
40 RESET
ML2302TB RESET
39 FIFOST
FIFOST
38
DGND
C23
37
VR 1
36
CB1
35
CB2
34
SPVDD
33
AVDD
C22 C24
0.01 1
C19
0.01
R17
150k
FUL
MID
EMP
WR
RD
CBUSY
FIFOST
RESET
J7
+3V
1
SUB_3C
2
VOL_UP_DOWN
3 to
SQL LOGIC unit
4
CPU_TX HJ9
5
CPU_RX
6
J6
A_AIN
A_AIN
1
B_AIN
B_AIN
to
2
LOGIC unit
AOUT AOUT
3
HJ8
GND
4
1 5
2
3 4
C26
0.01
A_SQL
5
1
2
3 4 B_SQL
C18
0.01
IC9
SN74AHC1G66HDBV
SQL
S1
VOL_UP_DOWN
S2
SQL
R18
330k
UP
S3
DOWN