Icom Ic-r75 Communications Receiver Service Manual

6 - 1
SECTION 6 MECHANICAL PARTS AND DISASSEMBLY
REF. NO. ODER NO. DESCRIPTION QTY.
J1 6510000370 Connector MR-DS 1
W3 8900007000 Cable OPC-684 1
W4 8900007000 Cable OPC-684 1
W5 8900007000 Cable OPC-684 1
W6 8900007000 Cable OPC-684 1
MP1 8010017710 2240 main Chassis 1
MP2 8110006700 2240 U-cover 1
MP3 8110006690 2240 L-cover 1
MP4 8930005790 Collar foot (A)  1
MP5 8930005800 Collar foot (B)  1
MP6 8010001520 Stand (C)  1
MP7 8930002900 Rubbr foot (A)  2
MP8 8930035240 1546 TR-B Clip 1
MP9 8930049600...

6 - 2
UNIT abbreviation(C): CHASSIS PARTS, (P): PLL UNIT, (M): MAIN UNIT, (F): FRONT UNIT, (D): DISPLAY UNIT
MP27 (F)MP37 (F)
MP26 (F)
SP1 (F)
MP2 (F)
MP1 (F)
MP11 (F)
MP10 (F)
MP16 (F)
MP15 (F)
MP13 (F) MP38 (F)
MP18 (F) MP14 (F)
MP7 (F)
MP9 (F)
MP17 (F)MP12 (F)MP4 (F)MP5 (F)MP24 (F)EP2 (D)
MP1 (D)
MP3 (D)
DS101 (D)
MP2 (D)DISPLAY UNIT
MP24 (F) W4 (F)W3 (F) MP10 (C)EP2 (F)MP15 (C)MP382 (M)
MP442 (M)
MP15 (C)MP13 (C)MP13 (C)MP13 (C)
MP13 (C) MP20 (C)
J1 (C)
MP19 (C)
MP17 (C)
MP18 (C)
MP3 (P)
MP9 (P)
MP12...

SECTION 7 SEMI-CONDUCTOR INFORMATION
7 - 1
2SA1576 R
(Symbol: FR)2SC4081 R
(Symbol: BR)2SC4116 BL
(Symbol: LL)2SC4405 3
(Symbol: OY3)
2SD1664 Q
(Symbol: DA)2SK1740
(Symbol: IJ)2SK2171 4
(Symbol: KM)2SK508 K52
(Symbol: K52)
DTC114 EU
(Symbol: 14)
XP4601
(Symbol: 5C) 2SK882 GR
(Symbol: TGR) 2SC4673 D
(Symbol: CO)
3SK131 MAS
(Symbol: V11)DTA114 EU
(Symbol: 14)DTA144 EU
(Symbol: 16)
XP4311
(Symbol: 3X)• TRANSISTOR AND FET’S
B
EC
EC B
EC BDG S
DG S
2SC4117 BL
(Symbol: CL)
B
EC
B
EC
B
C
EC
B
C
EC
B
EC
B
EC
B...

8 - 1
8-1 PHONE AND VR BOARDS
SECTION 8 BOARD LAYOUTS
R122
R121
C123 C122
C121
L121
• VR BOARD
R131 R141
J101
J101
to LOGIC board  J451
R143
GND
GND
GND
GND
GND
PB2L
PB1L
RFGL
AFGL
5VL
1 10
• PHONE BOARD
TOP VIEW 

8 - 2
•PHONE BOARD
BOTTOM VIEW
J121
J101
J101
to LOGIC board  J471
GND
AFE
AFE
AFE
ESPO
ESPO
ESPO
AFO
AFO
AFO10
1 

8 - 3
8-2 DISPLAY BOARD•TOP VIEW
DS11 DS21 DS31DS41DS51 DS61DS71
DS12DS22 DS32 DS42DS52 DS62DS72
DS13DS23 DS33DS43 DS53DS63 DS73DS81 DS82
DS83 

•BOTTOM VIEW
8 - 4
J101
R11
R21
R31
R41
R51
R61
R71
R81
R12
R22
R32
R42
R52
R62
R72
R82
C101Q11Q21Q31
Q41Q51
Q61 Q71Q81 IC101
J101
to LOGIC board  J411
14V
DIMV
COM4
COM2
V1
V3
CL2
MGND
GND
COM3
COM1
V2
CL1
DO
H5VL
2 16
1 15 

8-3 LOGIC BOARD
8 - 5
R257
R256
R255
R254
C255
C254
C253
C252
C251 C206
C204 C205 C256 R112C231
R261
R260 R121 R123
R127
R129
R131W163
W162
W161R163
R162
R161
R142
R144
R146
R148
R150
R152
R154
R171
R173
R175
R177
R179 R280
R281
R284
R291
R289
R287
R272
R274
R276
R278
R286 R279
R282
R283
R292
R290
R288
R271
R273
R275
R277
R285R141C221
R143
R145
R147
R149
R151
R153
R155
R172
R174
R176
R178
R191
R193
R195
R197
R210
R208 R192
R194
R196
R211
R209 R122 R403
Q401R402
R404
W401R405 C401
Q391 R398
C394 C395...

8 - 6
C116
C117
C72
C75
C79
L204
Q82
Q93 C123D72
R236
R83
C325C92C94
R93
C118
R94
R102
C101
C103
C100 R98
C105R96 R97D91R95D1 R107R26 R37 R27 R38 R28
R39 R29R40 R30R41 R31R42 R32
R43 R33
R44 R34R45 R35 C37
C44
C38
L23 L26R46
R25R36
R24R23
R235C327
C110C23
W18
D92C99EP8
EP5
EP4
EP2
EP3 EP6 R108C 111 C53 C52C33C31 R115 C127
D94
Q21 R73
C30
C28 R49
C126
C71
C57EP7
C12
X1IC151IC201 L2
C13 C11
Q1R151 C151
Q151
C167R180
C3 C8 R7 C7R8R9 C9R11
R21
C21
R1
C16
R172
R178
C318C319C310
C314C202
C205 R222Q201C201
R201...

8-5 MAIN UNIT
8 - 7
C1351
IC1361
L1311IC1391 Q1381 L1411 C1422
C1417 C1418
IC1771C1754 IC1401
C1420
L1412C1414 C1412C361L362R152
R101 Q1311 D1412
D1413Q1382R 111
C1362
C1364
C1311
D1311
C1382C1381C1411
C1416R1413R1412C1393
R1312
C1321 R1772 C1771
R1313
R1314
C161 C162 C164
R172 R174R341
C173 R381 C371
R475 R477 C474 C473
R493R476R472
R742
R733 R734
D712D781D782
D762D761
D711 D713
D714
R711R712C711
C733 R713 C721R721C723 R724R791C791 R793C771 C772R775 R796C792 R794
R774
C724C725
C712R781
R751R748...