Icom IC-7610 Service Manual page 83

• VR UNIT
MAIN RF/SQL MAIN AF
Maximum counterclockwise
Maximum counterclockwise 0 V
Center
Center 1.6 V
Maximum clockwise
Maximum clockwise 3.3 V
MAIN AF/ (RF/SQL)
R1
R3
4.7k
R4
4.7k
TP96D00A
[AF] (MAIN) is held down
[AF] (MAIN) is released
SUB AF/ (RF/SQL)
R2
R5
4.7k
R6
4.7k
TP96D00A
SUB RF/SQL SUB AF
Maximum counterclockwise
Maximum counterclockwise 0 V
Center
Center 1.6 V
Maximum clockwise
Maximum clockwise 3.3 V
• PBT UNIT
PBAAK,
PBBAK
PBABK,
PBBBK
TWIN-PBT
S1
3
B
1
(B)
COM
2
A
6
B
4
(A)
COM
5
A
PITCH 7 8
TP90D96AE20
3.3 V
Maximum counterclockwise 0 V
R1
Center 1.6 V R2
PITCH
Maximum clockwise 3.3 V 4.7k
R3
KEY-SPEED
KEY SPEED
4.7k
TP96D00
KEY-SPEED/PITCH
Maximum counterclockwise 0 V
Center 1.6 V
Maximum clockwise 3.3 V
0 V
1.6 V
3.3 V
3.3 V
J1
3R3V
1 3R3V
RFML
2 RFML
AFML
3 AFML
AFMK
4 AFMK
RFSL
DISPLAY UNIT
5 RFSL
AFSL
(1/2)
6 AFSL
AFSK
7 AFSK
8 GND
9 VLED+
10 VLED–
0 V
3.3 V
[AF] (SUB) is held down 0 V
[AF] (SUB) is released 3.3 V
J2
1 VLED+
DS1 (FRONT UNIT)
LED brightness 0% 7.9 V
2 VLED–
LED brightness 100% 9.5 V
0 V
1.6 V
3.3 V
clockwise counterclockwise
3.3 V 3.3 V
0 V 0 V
3.3 V 3.3 V
0 V 0 V
[TWIN-PBT] is held down 0 V
[TWIN-PBT] is released 3.3 V
J1
10 GND
9 PBBAK
8 PBBBK
7 PBAAK
6 PBABK
DISPLAY UNIT (1/2)
5 PBTK
4 3R3V
3 KSPDL
2 PTCHL
1 GND
10-3