Icom IC-FR3000 Service Manual page 61

SECTION 12 VOLTAGE DIAGRAM
GND
R18
47
5.0V
3.8V
R17
47
D5V
DB7
DB6
DB5
DB4
ENA
R/W
J2 BS
I MONI LCDV
24
I R/B A5V
23
CHUP
GND
22
CHDN
21
DISP 5.0V 0.5V
20
PROG
19
GND
18 R15
C12
GND
1.5k
17 0.001
A5V
16
RS
15
R/W
14
ENA
13
DB4
to LOGIC UNIT J3
12
DB5
11
DB6
10
DB7
9
D5V
8
D5V
7
BUSYL 5.0V
6
BASEL
5
RMTL
4
TXL
3
PROGL
2
DCL
1
Turn ON: 4.8V Turn ON: 4.8V Turn ON: 4.8V
Turn OFF: 0.0V Turn OFF: 0.0V Turn OFF: 0.0V
Turn ON: 2.1V Turn ON: 2.1V Turn ON: 1.8V
R8 R9
Turn OFF: 0.0V 150 Turn OFF: 0.0V 150 Turn OFF: 0.0V
DS1 DS2
BG3889S BG3889S
DC P
J8
L2
3
TELG
to LOGIC UNIT J13 2
L1
1
J2
BUSYOUT
14 1
TXOUT
2
COAXSW
3
M/SO
4
M/SI
5
D0
6
to LOGIC UNIT J11
D1/CTS
7
D2/RTS
8
D3/DTO
9
D4/DTI
10
E R/B
11
E PT2
12
E MONI
15 13
D22 D20
NNCD8.2C NNCD8.2C
C22
220p
D23 D21
NNCD8.2C NNCD8.2C
C23 C21
220p 220p
J3
RSSI
13
15
E MODG
12
E DTCS
11
E MODG
10
E MOD3
9
E MODG
8
E MOD2
to LOGIC UNIT J10 7
AF GND
6
AF OUT
5
AF GND
4
DISC OUT
3
DC GND
2
+E15V
1
14 C6
220p
D6 D5
NNCD8.2C NNCD8.2C
J4
GND
16
BLV
15
DB7
LCD
14
DB6
REMOTE
13
DB5
12
DB4
SP MUTE
11
DB3
10
DB2
9
DS7
DB1
8 MSC-C161UYLY-4W
DB0
7
ENA
6
R/W
5
RS
4
LCDV
3
A5V
2
GND
1
I R/B
I MONI
R24
47k
R23
47k
R22
47k
R21
CH DN
47k
CH UP
FREE: 4.7V
PUSH: 0.0V
Turn ON: 4.8V Turn ON: 4.8V Turn ON: 4.8V
Turn OFF: 0.0V Turn OFF: 0.0V Turn OFF: 0.0V
DISP
Turn ON: 2.1V Turn ON: 2.1V Turn ON: 2.1V
R10 R11 R12 R13
PROG
180 Turn OFF: 0.0V 150 Turn OFF: 0.0V 150 Turn OFF: 0.0V 150
DS3 DS4 DS5 DS6
BR-3889S BG3889S BG3889S BG3889S
FRONT UNIT
TX BUSY BASE REMOTE
L23 BLM21PG221SN1
L22 BLM21PG221SN1
L21 BLM21PG221SN1
L20 BLM21PG221SN10
L19 BLM21PG221SN1
L17 BLM21PG221SN1
L15 BLM21PG221SN1
L14 BLM21PG221SN1
L13 BLM21PG221SN1
L12 BLM21PG221SN1
D12
D18 D16 D14
NNCD8.2C
NNCD8.2C NNCD8.2C NNCD8.2C
C20 C18 C16 C14 C12
220p 220p 220p 220p 220p
D19 D17 D15 D13 D11
NNCD8.2C NNCD8.2C NNCD8.2C NNCD8.2C NNCD8.2C
C19 C17 C15 C13 C11
220p 220p 220p 220p 220p
L6 BLM21PG221SN1
RSSI
L5 BLM21PG221SN1
E DTCS
L4 BLM21PG221SN1 E MOD3
L3 BLM21PG221SN1 E MOD2
L2 BLM21PG221SN1
L1 BLM21PG221SN1
C5 C4 C3 C2 C1 C8
47p 47p 47p 47p 47p 220p
CP2 CP1
D4 D3 D2 D1
NNCD8.2C NNCD8.2C NNCD8.2C NNCD8.2C
REMOTE SP MUTE
FREE: 4.7V
PUSH: 0.0V
S7 SKQDPB S8 SKQDPB
RPT/BASE MONI
FREE: 4.2V
PUSH: 0.0V
S6 SKQDPB S5 SKQDPB
Q1 2SC4081
M MONI
R26
47k
L1
1µH
MIC
CH DN CH UP
MICE
FREE: 4.7V
S4 SKQDPB PUSH: 0.0V S3 SKQDPB
R2 10
M PTT
R3 10
CLONE
L9V
D1
NNCD8.2C
9.1V
C1 C2
0.001
0.001
ANI CLR PROG
S2 SKQDPB S1 SKQDPB
Power supply: DC13.6V
Mesurement Frequency: TX 162.500 MHz, RX 162.125 MHz /
Internal resister of a volt meter: 50 kΩ/V
L2
TELG
L1
J1
BUSY OUT 1
TX OUT 14
COAXIAL SW 2
to FRONT UNIT J9
M/S OUT 15
3
M/S IN
16
L18 BLM21PG221SN1 D0
4
D1
17
L16 BLM21PG221SN1 D2
D3 5
D4 18
EXT RPT/BASE 6
to LOGIC UNIT J9
EXT PTT 19
D-SUB25P JACK
EXT MONI 7
L11 BLM21PG221SN1
20
RSSI
8
EXT DTCS
AGND 21
EXTMOD IN B 9
AGND 22
EXTMOD IN A 10
23
AGND
11
AF OUT
24
AGND
DISC OUT 12
DC GND 25
+15V 13
AF OUT
AF GND
DISC OUT
DC GND
+E15V
JACK2 UNIT
CP1
R1
C16
470
C19
0.001
0.001
TX: 0.0V CP2
CP3
RX: 4.4V
C15
0.001
C20
0.001
C4
0.001
D3
NNCD8.2C
C3 D2 C5
0.001
0.001 NNCD8.2C M MONI
SPG
MIC
MICE
M PTT
SPR
CLONE
L9V
L2
TELG
L1
JACK1 UNIT
1
2
J3
SPG
14 1
SPR
2
SP
1 3
SPG
2 4
–PTT
3 5
+PTT
4 6
–AFOUT
5 7
+AFOUT
6 8
–EXTMOD
7 9
+EXTMOD
8 10
+BUSY
9 11
–BUSY
10 12
11 13
15
C11
C10 C8 C6 C4
47p
220p 220p 220p 220p
C12 R10 R8 R6 R4
KU15N14 KU15N14 KU15N14 KU15N14
47p
C9 C7 C5 C3
220p 220p 220p 220p
R9 R7 R5 R3
KU15N14 KU15N14 KU15N14 KU15N14
12 - 1
J1
REMOTE
1
SPMUTE
2
MICE
3
MIC
4
GND
5
to LOGIC UNIT J4
L9V
6
CLONE
7
M PTT
8
M MONI
9
GND
10
J9
SPG
1 3
to JACK1 UNIT J3
SPR
2 4
R27
15
R28 SP1
15 J3
SPR
1 3 1
SPG
2 2
4
C13 C14
0.001 0.001
J7
M MONI
8
SPG
7
MIC
6
MICE
5
SP/MIC
M PTT
4
SPR
3
CLONE
2
L9V
1
W1
[GEN2], [GEN4],
[EUR2], [FRG2]
J6
1
1 2 L1
2
LINE
L2
F1 3
C18
4
SRB-1A
0.001
[USA2]
R19
C17
KU10R29N
0.001
SP JACK
J1
C14
0.001
C13
47p
SPG
SPR
CP1
SP
SPG J2
–PTT L1
1
+PTT L2
2
–AFOUT L3
3
+AFOUT L4
MODULAR JACK
4
–EXTMOD L5
5
L6
+EXTMOD
6
L7
–BUSY
7
L8
+BUSY
8
L1 – L8
BLM21PG221SN1
C2
220p
R2
KU15N14
C1
220p
R1
KU15N14
NOTE :
Voltage line
RX line