Icom ID-31A Service Manual page 32

SECTION 9. BOARD LAYOUTS
• MAIN UNIT
[ANT]
(TOP VIEW)
V0 V5 V10 V15 V20
D9
R54
C62
6
S2
R53
R65
C8
R8
C5
EP4 C7
C11
+
Q17
+
Q2
C282 R76 R79
R46 R12
R45 Q8 R13
R11
R44
L24
R19
D37
D3
C260 C242
C333
R164
R163
4
Q37
C173
5
R218
C250 R217
C252
C351 L42
C237
R210
Q41
R200
R215
EP14
R202
R201 C216
C229
C223
R158
C208
C329
R184
R185
R180 C183
D21
C217
Q39 D20
R183 R174
C203
R176
C206
C336 Q14
C32
C40
R67
R112
R113
R90
C91
3
L11
C172
R139
C145 R144
R116
C112
C30 C27
IC11
R34 C28
C36
R27
R37 R32
C39
R35 R36
R154 R155
C128
IC15
R115
Q35 Q34 Q33
C114
IC16
IC10
R274
C360
MP9
B-7489C
SP1 (CHASSIS)
V25 V30 V35 V40 V45 V50
C78
J5
R5 R6
C107
R109
R108
C1
-
–
C348
C13
IC1
C352
EP7
C9
Q1
J4
C347
C358
C274 C17
C340
Q49
C21
C176
R258
C341
R257
1
C25
C337
R261
C338
Q50 C23
R262
C60
R263
C187
C168 D15
R157
D16
R162
R26
C29
C180
C174
R167
D19
R170
C190
R166 C195 Q36
C182
C181
C169
C179
J2
R106
C88
C89
R92
R97
R78
R83
C77
C80
R94
C86
C99 C100
R127
2
R125
C106 C95 R84
C83
R104
Q15
9 - 1
• LOGIC UNIT
V0 V5 V10
(TOP VIEW)
DS7
MP28
C208
Q9 Q8
Q24
R16
[MIC]
[SP]
S11
DS2
S4
DS4
S8
[DC IN]
C92 R86
R10
R85
C108
IC11
V15 V20 V25 V30 V35 V40
J2
R206
S10
S7 S6 S5
D3
D1
C29
S3
S1
B-7490E
R234
R241
C204
The combination of this page and next page shows
the top side and bottom side of actual P.C. board.
V45
C65
S9
DS5
S2
DS6
MC1
C182
C178
R185
R186