![background image](http://html2.mh-extra.com/html/icom/ic-9700/ic-9700_service-manual-addendum_3446179070.webp)
10-18a
(Amended page)
June 2019
The waveform and voltage indications have been added on the original page.
The underlined parts have been updated from the addendum of the previous version, or from the original page.
Explanatory notes
RX Line
TX Line
Voltage Line (8V)
7.8 V
TX : 0 V
RX : 6.6 V
DISPLAY UNIT
MMZ1608Y102BT
EP5
MMZ1608Y102BT
EP2
MPZ2012S601A
EP7
J1
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
MMZ1608D301B
EP9
MPZ2012S601A
EP12
MMZ1608D301B
EP10
MMZ1608Y102BT
EP4
MMZ1608Y102BT
EP3
J2
1
2
3
4
5
6
7
8
9
10
MMZ1608Y102BT
EP11
SHORT
CP1
47P
C8
0.01
C1
0.01
C3
0.01
C5
0.01
C2
0.01
C6
0.01
C7
100P
C4
8V
MUDL
MICE
MICI
SQLS
AFO
PSEND
SQLS
GND
AF OUT
GND
MIC U/D
8V
AFO
MIC
MUDL
MICI
8V
GND
SQL
PTT
MICE
PSEND
MICE
PSEND
3.3 V
When an SD card is:
Inserted : 3.3 V
Not Inserted : 0.6 V
When an SD card is:
Inserted and write protect is ON: 3.3 V
Inserted and write protect is OFF : 0 V
Not inserted: 3.3 V
MPZ1608S601A
EP7
10
C2
J2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
27
R2
27
R5
27
R4
27
R8
27
R6
27
R3
220
R9
220
R1
0.1
C1
J1
#1
#2
CD1
#4
#5
#6
#7
#8
#9
CD2
WP1
WP2
#3
SDDAT2
SDDAT1
VDD(3R3V)
SDCD
SDCLK
SDWP
GND
SDDAT0
SDCMD
SDDAT3
GND
GND
MAIN UNIT
(4/13)
SD CARD
3.2 V
SUB RF/SQL
SUB AF
Maximum counterclockwise
Center
Maximum clockwise
0 V
1.6 V
3.2 V
Maximum counterclockwise
Center
Maximum clockwise
0 V
1.6 V
3.2 V
DISPLAY UNIT
SUB AF/ (RF/SQL)
J1
1
2
3
4
5
6
7
8
R09430GMFB30.5C7B103
R1
3R3V
SAFL
SRFL
GND
GND
SVRK
When [SUB AF] is:
Held down : 0 V
Released: 3.2 V
3.2 V
When [MAIN AF] is:
Held down : 0 V
Released: 3.2 V
MAIN RF/SQL
MAIN AF
Maximum counterclockwise
Center
Maximum clockwise
0 V
1.6 V
3.2 V
Maximum counterclockwise
Center
Maximum clockwise
0 V
1.6 V
3.2 V
DISPLAY UNIT
MAIN AF/ (RF/SQL)
J1
1
2
3
4
5
6
7
8
R09430GMFB30.5C7B103
R1
GND
GND
MAFL
MRFL
3R3V
MVRK
• VR-A UNIT
• VR-B UNIT
• RIT UNIT
• PHONE UNIT
• MIC UNIT
• SD UNIT
When [RIT] is:
Held down : 0 V
Released: 3.2 V
3.3 V
MFDAK
Clockwise
Counterclockwise
MFDBK
0 V
3.3 V
0 V
3.3 V
0 V
3.3 V
0 V
DISPLAY UNIT
RIT (MULTIFUNCTION)
TP90N00AE20
S1
J1
1
2
3
4
5
6
7
8
MFDAK
MFK
MFDBK
GND
GND
COM
A
B
When headphones are:
Connected : 3.2 V
Not connected: 0.6 V
DISPLAY UNIT
PHONES
MPZ2012S601A
EP401
MPZ2012S601A
EP403
MPZ2012S601A
EP402
J1
J2
1
1
2
2
3
3
4
4
5
5
100
R403
100
R404
1k
R401
0.01
C401
0.01
C404
PHOE
PHK
PHB
PHA
* Refer to the PARTS LIST for the value and name of components.