1

2

3

4

A

B

C

D

4

3

2

1

D

C

B

A

S1

UP

S2

DOWN

S3

SQ

MK1
SD-11

BR9000-PTT-V3

C2
103P

C1
103P

C3
103P

6

5

4

1

2

3

SW4

PS-22E03

PTT

MIC

R8
4K7

UP/DN

R3
47K

R2

100K

R1

150K

1

2

4

3

J3
PR-0084