Kenwood KAC-7202 User manual

© 2005-3 PRINTED IN JAPAN
B53-0248-00 (N)1708
POWER AMPLIFIER
KAC-7202/7252
SERVICE MANUAL
REMOTE CONTROL
Stereo Bridgeable
Powe Amplifie
65
75
85
95
100
50
17
2
15
11
9
1840
FREQUENCY
LEVEL[dB][Hz]
Accessories
(W01-1606-05)
KAC-7252
(E type,M type)
Dressing Panel
(A21-4463-02)
: KAC-7252
(A21-4525-02)
: KAC-7202
Screw set
(N99-1759-05)
Screw set
(N99-1766-05)
Connecting cord assy
(E30-6145-05)
Modular cable
(E30-6240-15) Mouting hardware (J22-0301-14)
Remote control
CONTROL SYSTEM
KAC-7202
KAC-7202
KAC-7252(K type)
Dressing Panel
(A21-4467-02)
: KAC-7252(K type)
(A21-4468-02)
: KAC-7202
(A21-4526-02)
: KAC-7252(E type),
KAC-7252(M type)
Except KAC-7202
6m
19cm
Fuse (40A)
(F52-0016-05)
Except KAC-7202
This product uses Lead Free solder.

KAC-7202/7252
2
BLOCK DIAGRAM
50-200Hz
HPF
SENS
L
LINE IN
ISO AMP
IC12,16 IC1(X08)
LINE OUT L40-100Hz
BASS
BOOST MUTE
Q201-258
POWER AMP
IC7-9,13,15 Q241,242
MO/ST
LINE OUT R
LINE IN RMUTE
BOOST
50-200Hz 40-100Hz
HPF BASS
SP IN L
SP IN R
CONTROL
f, GAIN
REMOTE CONTROL
D.D. CON.
AVR
GAIN=0-18dB
f=40-100Hz
SP OUT L
SP OUT R
P-CON
BATT
GND
15V
LPF
50-200Hz
IC1
LPF/OFF/HPF
IC3(X08)
COMPONENTS DESCRIPTION
ADJUSTMENT
No. ITEM ALIGNMENT POINT METHOD ALIGN FOR NOTE
IDLE VR1 (Lch) Connect a DC voltmeter After Power on
1CURRENT VR2 (Rch) between check land 2.5mV 5 minutes
(Refer to PC BOARD)
●PREAMPLIFIER UNIT (X08-4190-1x)
Ref. No. Application / Function
IC1 HPF
IC2 Phase reversal amplifier (Lch only)
IC3 LPF
IC4~6 Bass-boost circuit
IC7 Bass-boost mixing amplifier
●AUDIO UNIT (X09-5830-1x)
Ref. No. Application / Function
IC1,12,16 Input isolation amplifier
IC5 DC/DC converter
IC6 Temperature detection comparator
IC7,8 For adjusting bass-boost f
IC9 For adjusting bass-boost gain
IC13 Bass-boost phase shifter
IC15 Bass-boost mixing amplifier
Q1,2 ±15V AVR
Q3~8 DC/DC converter FET
Q9~12 DC/DC converter FET driver
Q13,14 For controlling DC/DC converter FET driver
Ref. No. Application / Function
Q101 Remote controller reference voltage
Q201~204 Power amplifier initial step differential driving
Q209,210 Current limiter
Q205~208 Power amplifier second step differential driving
Q211,213 Temperature detection for idling
Q220,222~227,229 Power amplifier final
Q241,242 Power amplifier mute
Q251~258 Power amplifier driver
Q280,282 Power amplifier ATT (-3dB)
Q601,615~618 Power-ON shock preventer circuit
Q602 P-Con OFF detection
Q603 Mute drive
Q604,605 P-Con control circuit
Q606 Excess voltage detection
Q607,608,619,620 Temperature detection control circuit
Q609 Fan power supply
Q610 Excess current detection
Q611,612 DC detection
Q613,614 DC detection for latch
Q621,622 For LED control
Q623 Temperature detection control circuit

KAC-7202/7252
3
EDCBA
1
2
3
4
5
6
7
R603
R604
R601
R623
R624
W277
C57
C53
W276
W53W54
W51
W62
W52
C113
W55
W58
C51
C112
C602
C152
C153
C155
C156
W274
R104
R109
R110
R111
R123
R124
R126
R163
C103
C104
C105
C106
C154
C157
R105 R106
R107
R108
R121
R122 R128
R152
R153
R154 R155
R156 R157
R158
R159
R160
R161
R162
C59
C58
C60
R131
R132
C117
C118
C109
C115
C110
C116
W151
W152
R133
R134
R135
R136
R139
R140
R146
R145
R143
R144
R148
R147
R129
R130
R137
R141
R142
R138
W61
W56
W57
W59
W60
W275
W257
W251
W264 W266
W273
W265
W256
W254
W263
W259
W260
W267 W258
W253
W262
W255
W252
W261 W268
W269
W270
W271
W272
41
85
14
58
58
14
41 58
41 58
85
14
41 58
W204
W203
W30
W36 W32
W5
VR62
3
1
3
13
42
C604
13
C603
W4
12
W8
W6
W14
W10
W25
W19
W26
W201
W202
0dB
VR102
BASS BOOST
18dB
W31
C107
VR61
1
W1
C124
W2
C123 W3
C54
W21
W7
C158
W11
LOW PASS
W24
W22
W16
W15
HI PASS
VR152
146352 VR101
W12
INPUT SENS
W20
W18
W9
C108
W17
W13
C52
W23
5614 VR4 325614 3 2
W28
W27
W29
W210
W207
W212
W34
W33
1
10
5 6
50Hz
W206
W205
200Hz
W209
W211
W208
200Hz
50Hz
W39
W35
1 4
3 6
W38
HPF
200 V
5V
OFFLPF
MONO
W37
W40
ST
113
14
VR1-L
ISO-L
RCA-G
ISO-R BB-L
-15V
BB-R
LOGO-LED
FAN+B
D-GND
+15V
VR1-R
ISO-GND-1
ISO-GND-2
1
TP164
TP11
TP12
TP7
TP9
TP5
TP1
TP2 TP3
TP8
TP10
TP13
TP14
TP15
TP105
TP106
TP107
TP113
TP114
TP115
TP116
TP117
TP118
TP119
TP121
TP126
TP127
TP152
TP153
TP154
TP155
TP156
TP157
TP158
TP159
TP160
TP161
TP162
TP163
TP63
TP64
TP62
TP61
TP60
TP65
43652
D614
CN3
CN1
J1
FREQUENCY
BOOST
LEVEL
S6
S1
CN8
IC1
IC2
IC3
IC4
IC5
IC6 IC7
X08 B/2
PREAMPLIFIER UNIT X08-4190-1x A/2 (J76-0069-12)
X08-4190-1x
Ref. No. Address
IC1 4C
IC2 4B
IC3 4B
IC4 2B
IC5 2B
IC6 2A
IC7 3A
PC BOARD (FOIL SIDEVIEW)
Refer to the schematic diagram for the values of resistors and capacitors.

KAC-7202/7252
4
FGHIJ
1
2
3
4
5
6
7
4
1
2
9
10 13
24
37
5
62
1
1
214
13
C2
C143
C3
C142
C611
C612
R406
C108
C109
C137
C110
R111
C4
C5
C156
C129
C130
C131
C601
C161
C203
C204
C207
C208
C263
C264
C132
C602
C603
C604
C605
C608
C225
C226
R6
R179
R203
R204
C104
C105
C117 C118
C123 C124
C125
C126
C135
C136
C144
C145
C149 C150 C151 C152
C201
C202
C209
C210
C212
C21
C214
C215
C216
C217
C218
C606
R1
R2
R3
R4
R29
R101
R102
R107
R108
R122 R123
R124
R125
R126
R127
R169
R171
R173
R174
R175
R177
R202
R211
R212
R213
R214
R220
R222
R233
R234
R235
R236
R243
R246
R247
R248
R257
R258
R261
R262
R271
R272
R342
R343
R344
R608
R616
R619
C155
C7
W19
C223
C261
R178
W32
W148
W145
W130
W33
W47
W58
W46
W50
W52
W59
W68
W138
W24
W25
W57
W56
W65
W114
W26
W31
W28
W29
W35 W36 W45
W49
W30
W96
W42
W43
W38
W150
W161
W151
W41
W3
W39
W104
W123
W102
W78
W79
W120
W107
W126
W110
W135
W132
W67
W144
W115
W72
W139
W40
W44
W71
W131
W146
W127
W73
W142
W147
W136
W133
W75
W143
W82
W54
W129
W149
W99
W101
W51
W53
W83
W
1
W17
W55
W69
W27
W159
W137
W157
W125
W6
W113
R184
R185 R186
R187
W70
W109
W98
W103
W134
W124 W88
W89
W90
W85
W80
W121
W87
W154
W152
W100
W86
W158
W112
W116
W119
W118
W111
W108
W97
W95
W155
W156
W105
W94
W81
W92
W77
W128
W48
W61
W66
W122
W64
W60
W63
W62
W74
W84
W93
W91
W141
W76
W160
W140
W153
C618
C20
VR1
VR2
W610
W611
W614
C170
W370
C120
R119
C103 W376 W373
R104
R114
C115
R103
R118 R112 R109 C119
W378
R130
W380
W382
W379 C167
R128
W381
R168
R113
C116 R110
R115
W386 R131
R167
W501 R162
R129
W372
C141
R164 R152
W383
TH602
R163
C140
R161
W502
R151
R135
R658
R606
W368 R617
C609
R634
R626
R629
R635 R622
R156 R176
R148
R153
R154
C610
W336 W320
W324
R660
R632
W335
R139
R143
R664
R659
C616
R661
R667
W339
C134
R150
C133
W366
R149
W334
C128
R137
R668
R142
R136
R134
C127
W361
W338
R138
R264
R280
R287
W369
R260
W352
W390
W385
R240
C220
R230
R290
C222
R232 W371
TH202
W327
W328
W329
R201
R285
C206
C228 C205
C227
R289
R249
R207
W3
W31
W357
C21
9
R625
R229
R120
C102
C101
C157
C111
W389
R105
R116 R117
C113
W388
C114
W387
R121
C165
R181
C121
C158
C122
C112
W392
R106
C139
R158
R160
R166
C138
R157
R159
R165
R141
W346
R630
W333
C147
C148
C153
R146
W358
W349
C146
R145
W337
W340
R603
R604
W326
R627
R633
C168
R147
C166
C169 R170
W321
C607
R631
W322
R614
R609
R605
R613
R607
W319
R602
R610
R611
R612
R615
R666
R662
R663
R665
W332
W363 W343
W325
R133
W323
W331 R140
R132
R620
R621
W351
W364
W347
W345
W330
W350
W377
R216
R206
R224
R208
W356
R218
W315
W312
R238
W375
R228
W393
W362
W353
R624
W384
R226
R639
R638
R636
W348
W374
W342
R250
R209
R265
R266
R282
R284 W367 R227
R241
R242
R210
R263
R637
C221
TH201
R231
R205
R225
W391
R239
R251
W359
W344
17
814
17
814
17
814
14
58
14
58
14
58
14
58
14
58
EB
EB
EB BE
BE BE BE BE
EB EB
EB
EB
EB
EB
EB
EB
EB
E
B
E
B
E
B
EB
EB
B
E
EB
BE
EB
EB
EBBEBEBE
BEBEBE EB
BE
BE
BE
BE
BE
BE BE
BE
BE
BE
BE
BE
BEBE
BE
BE BE
BE
BE
BE
Q604
Q609
D615
Q611
Q612
Q613
D152
D203
D204
D205
D206
D261
D601
D602
D603 D605
D613
Q201
Q202
Q203
Q204
Q206
Q2
0
Q208
Q210
Q
Q216
Q217
Q218
Q251
Q252
Q253
Q254
Q255
Q256
Q257
Q258
Q601
Q610
D108
D612
Q607
D610
Q1
Q2
J1 J2 J4
Q211
Q213
Q220
Q222
Q225
Q226
Q229
CN1
Q224
D106
D102
D107
Q101
Q621
D614
Q606
Q605
Q618
D109
Q242
Q282
D229
D295
Q280
Q241
D253
D103
D104
D105
D101
Q619
Q622
D608
Q602 Q617
Q614
D604 D606
Q603
D607 Q623
Q615 Q616
D4
D254
D3
D255
IC16
IC12 IC1
IC15
IC8
IC13
IC9
IC7
AUDIO UNIT X09-5830-1x A/2 (J76-0073-11)
LINE
OUT LINE IN
SPEAKER
LEVEL
INPUT
REMOTE
SP
E
D
C
L
Lch
DC voltmeter
Rch
Rch
2.5mV
Refer to the schematic diagram for the values of resistors and capacitors.
PC BOARD (FOIL SIDEVIEW)

KAC-7202/7252
5
ONMLK
1
2
3
4
5
6
7
13
C16
C1
C8
C9
C17
C615
R5
R
6
C13
C15
C211
C213
C215
C217
C18
R7
R8
R28
R29
R155
R172
R219
R221
R235
R245
R341
R30
W602
W601
C6
L1
L2
W32
W22
W33
W26
W31
W28
W29
W30
W2
W1
W12
W13
W14
W15
W16
W
102
W4
W9
W8
W7
W11
W10
W20
W18
W21
W117
W106
W37
W27
W23
C19
W5
C617
C20
W606
W607
W609
W603
C10
C11
L3
W608
R643
R647
W354
R646
R657
R651
R648
R21
W308
R26
R17
R18
R13
R12
R14
R11
R618
R649 R642
R207
W318
W317
C219
R229
R614
W314
R652
R653
C614
R650
W355
R656
W302
R19
R27
W304
R23
R22
W305
C14
R24
R20
R25
W301
W313
R623
W310
R16
W307 W306
W303 R15
W309
W311 R9
R205
R223
R239
R251
R215
R217
TH601
R10
TH605 R237
C613
85
41
16 9
81
BE
EB
EBEB
E
B
EB BE EB
SGDSGDSGDSGDSGDSGD
BE
BE
BE
BE
BE
BE
BE
D9
D7
D8
D203
D251
D260
D616
Q205
Q207
Q209
Q215
Q3
Q4
Q5
Q6
Q7
Q8
Q608
D611
J3
D1
D2
P1
1
Q223
Q227
WH1
D5 D6
0
6
Q12
Q9
Q14
Q13
D10
Q10
Q620
D609
D617
Q11
IC6
IC5
X09 B/2
SPEAKER OUTPUT POWER IN
DC voltmeter
Lch 2.5mV
X09-5830-1x
Ref. No. Address
IC1 6H
IC5 6N
IC6 5K
IC7 5I
IC8 5I
IC9 5H
IC12 6G
IC13 5H
IC15 5H
IC16 6G
Q1 2H
Q2 2H
Q3 4N
Q4 3N
Q5 4N
Q6 3N
Q7 5N
Q8 4N
Q9 5N
Q10 5N
Q11 5N
Q12 5N
Q13 5N
Q14 5N
Q101 6I
Q201 3H
Q202 3H
Q203 3I
Q204 3H
Q205 3K
Q206 4G
Q207 3K
Q208 4H
Q209 3K
Q210 4G
Q211 2J
Q213 3G
Q215 2K
Q216 4G
Q217 3I
Q218 2G
Q220 4G
Q222 3G
Q223 2K
Q224 4G
Q225 2I
Q226 2G
Q227 2L
Q229 2J
Q241 4H
Q242 4H
Q251 2I
Q252 3F
Q253 2I
Q254 3F
Q255 2I
Q256 4G
Q257 2I
Q258 4G
Q280 4H
Q282 4H
Q601 6J
Q602 6J
Q603 6J
Q604 6J
Q605 6J
Q606 6J
Q607 5G
Q608 2K
Q609 6I
Q610 6I
Q611 6I
Q612 6I
Q613 6I
Q614 6I
Q615 5J
Q616 5J
Q617 6J
Q618 6J
Q619 5G
Q620 2K
Q621 6I
Q622 6I
Q623 6J

KAC-7202/7252
6
ABCDE
1
2
3
4
5
6
7
Q610 Q613
Q612
Q611
J2
Q253
Q257
Q251
D101
D102
D103
D253
Q282
D295
Q242 D254
Q241
Q201
D229
Q205
Q215
D255
Q280
Q203
Q207
Q217
Q209
Q255
Q616
Q615
Q618
Q617
D106 D107
D104 D105
Q101
Q621
Q
6
D615
D613
D205
D203
D260
D251
D5
D6
D3D4
Q227
Q223
Q2
D108
Q1
Q614
D109
D614
Q225
Q229
∗
J1
Q211
(1/2)
IC16
(1/2)
IC12
ISO. AMP
(2/2)
IC12
IC16
(2/2)
POP NOISE-MUTE
IC1
(1/2)
(2/2)
IC1
R
L
Q256
Q204Q202
D206
Q208Q206
Q213
Q210
D261
Q218
Q216
D204
Q226
Q252
Q254
Q222
Q220
Q224
Q258
D152
∗
A
LR
LINE OUT
LINE IN
SPEAKER
INPUT
LEVEL
ISO. AMP
15V AVR
-15V AVR
DC
DETEC.
POWER AMP
IC7
IC8
(X09-5830-xx) (A/2)
10K
10K
10
K
1
+15.2V
-15.2V
-15.2V
+15.2V
+15.2V
-15.2V
47.4V
-47.4V
-15.2V
15.2V
TP1
TP2
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP12
TP13
TP15
TP16
TP17
TP18
TP19
TP20
TP21
TP22
TP23
TP24
TP25
TP26
TP27
TP28
TP29
TP30
TP31
TP32
TP33
TP34
TP35
TP38
T
P
TP47
TP49
TP50
TP51
TP52
TP53
TP54
TP55 TP56
TP58
TP59
TP60
TP123
TP124
TP127
TP128
TP129
TP130
TP131
TP132
TP133
TP134
TP136
TP137
TP138
TP139
T
P
TP161
TP162
TP163
TP164
TP165
TP167
TP174
TP175
TP176
TP177
TP178
TP179
TP180
TP182
TP184
TP190
TP193
TP194 TP195
TP199
TP200 TP201
TP202
TP204
TP207
TP208
TP209
VR1 220
TH201
4
1
2
3
5
6
71K
R101 10u50 C104
10K
R103
10K
R104
10u50
C105
1K
R102
C103 0.1
130
R107
1K
R105
C109
10u50
C108
83
4
213
28
4
1
10K
R114
R116 10KR117 10K
R119 10K
22u35
C117
10K
R113
10K
R115 6
57
5
6722u35
C118
2.2K
R132
10K
R136
10u50
C156
10u50
C129
10u50
C137
1u50
C161
47K
R176 470
R153
1u50
C131
16K
R141
10K
R137
10u50
C124
10u50
C123
R128 10K
C119 150P
R129 10K
43K
R131
10u50
C149
10u50
C150
2.2K
R122
2.2K
R123
10u50
C151
10u50
C152
150P
C166R185 10K
R127 47K
R187 10K
R126 47K
47K
R124
C120 150P
0.01
C122 0.01
C121
6.8K
R241
6.2K
R219
47P
C227
10u50
C201
10K
R201
10K
R285
100
R209
4700P
C205
47u25
C207
R203 22K
22K
R213
22P
C213
22P
C217
510
R225
330P
C211
1K
R211
100u63
C261
1K
R205
1K
R207
47
R667
47
R668
6.8K
R665
6.8K
R666
10K
R662
10K
R663
5.6K
R659
0.1
C616
47K
R664
47K
R660
56K
R658
100u6.3
C606
12K
R617
R620 47K
R621 47K
100u6.3
C608 2.2K
R634
1u50
C611
10u50
C612
47u25
C3
47u25
C5
C2
47u25
C4
13K
R4
100
R233
470
R261
2W2W
1000P
C219
1000P
C221
2.2K
R249
4.7
R173
4.7
R343
10u50
C215
100
R235
C209 12P
12K
R631
12K
R632
C607
R635C609
47K
R630
2
4
31 8
6
57
1K
R106
14 13 12 11 10 9 8
1
2
3
4
5 6
7GNDVCC
3
1
5
9
7
4
2
6
10
8
0.01
C157
1
R120
1
4
C115 100P
100P
C113
C111 15P
10K
R112
5
C116 100P
100P
C114
C112 15P
6
130
R108 4.7K R110
0.01
C158
10u50
C101 1000PC102 1000P
TP3
3
2
TP14
1K
R111
1000P
C110
47K
R125
150P
C165
10K
R184
150P
C167
10K
R186
R170 10K
C170 150P
150P
C168
43K
R130
10K
R181
150P
C169
TP187
C9 C8 R7R8
4700u56
C7 4700u56
C6
16K
R15
0
3.3K
R284
10K
R266
10K
R265
3.3K
R282
10K
R287
1.5K
R263
220P
C263
150
R215
6.2K
R221
100
R289
2.2K
R237
15K
R229R231
4.7
R341
4.7
R172
470
R271
1.8K
R239
TP188
33
R251
150
R217
15K
10
R202
2W 2W
R247 0.1 R245 0.1
R257 0.1 R155 0.1
R218
150
C212
TP192
C206
4700P
R204 22K
1K
R206 R208
1K
TP205
R210
100
TP203
C264
220P
C208
47u25
R212
R264
1.5K
1K
TP206
330P
C214
22P
TP189
10u50
22P
C218 C216
R226
510
TP191
220
VR2
C222
TP181
R232
1000P
15K
C220
R230
1000P
15K
TH202
TP183
TP170
TP172
TP173
R246 0.1
TP171
2W
R248 0.1
470
R262
470
R272
TP169
2W
2W
R258 0.1
2W
R243 0.1
TP186
R216
150
TP185 TP168
TP198
TP197
100
R236
470P
C225
470P100u63
C223 C226
AMP L
AMP R
R227 10KR228 10K
470P
C204 470P
C203
150
R223
150
R224
33
R260
100
R234
1.8K
R240
22K
R214
12P
C210
2.2K
R250
100
R290
4.7
R342
4.7
R174
4.7
R344
4.7
R175
2.2K
R238
10u50
C202
10K
R280
47P
C228
6.2K
R222
6.2K
R220
TP196
6.8K
R242
1
2
10K
R138
4
1
3
2
VCC
5 6
7
11 14 12 13
GND
9 10 8
10K
R139
2.2K
R133
10u50
C130
+
16K
R14
9
100P
C153
100
R179
4
3R169 100
R171 100
R177 100
100P
C148
100P
C147
100P
C146
470K
R148
1K
R145
10K
R156 2.7K
R154
1K
R146
180
R168 180
R167
R147
47u25
R639 10KR638 22K
R637 150KR636 100K
13K
R3
R5 33KR6 33K
10K
R629
6.2K
R633
0.01 10K
0.01
47K
R661
0.01
C610
14
2
1
4
2
8.2
R178
0.1
C127
0.1
C128
16K
R140
2
1
+15V
+15V
+B
+B
+15V
+15V
+15V
+B
+B
+
+B+B
+B
-15V
-15V
-15V
+15V
+15V
-15V
-B
-B
-B
-15V
4.7K
R109
10K
R118
1
R121
10u50
C14
3
+
+
+
+
+
+
++
+
+
+
+ +
+
+
+
+
+
+
+
+
+
+
+
++
++
++
+
+
+
+
+
+
X09-5830-1x A/2 (1/2)

KAC-7202/7252
7
JIHGF
1
2
3
4
5
6
7
Q11
Q10
Q12
Q9
Q601
Q13
Q14
D10
Q609
D617
Q602
Q606
Q605
Q603
Q621
Q622
D9
D7
D8
D605
D603
D602
D601 P1
D5
D6
Q604
D612
Q607
Q619
Q4
Q3
D611
D607
D109
D606
D608
D614
D604
Q623
D610
IC13
(1/2)
(2/2)
IC13
D616
D2
D1
IC6
IC6
(2/2)
(1/2)
IC15
(1/2)
IC15
(2/2)
∗
J3
CN1
Q608
Q620
Q5 Q7
Q6 Q8
J4
(X09-5830-xx)
IC1,6,12,13,15,16
: RC4580IDR
IC5 : TL494IDR
IC7-9 : NJM2172V-ZBTE2
Q1 : 2SD2012-F
Q2 : 2SB1375-F
Q3-8 : 2SK3662-F
Q9,12 : 2SC4097
Q10,11 : 2SA1577
Q13,14,621
:DTA114EUA
Q101,241,242,280,282,
602,605,606,616,618
: 2SC4081
Q201-204,217,218,607,608
: 2SA992-A(F,E)
Q205-208 : 2SC3478AA(L,K)
Q209,210 : 2SA1376AA(L,K)
Q211,213 : 2SC3419(Y)-F
Q215,216,601
: 2SC1845-A(F,E)
Q220,223,224,227
: 2SC4467NF
Q222,225,226,229
: 2SA1694NF
Q251,253,256,258
: 2SC2235-F
Q252,254,255,257
: 2SA965-F
Q603,614,615,617
: 2SA1576A
Q604 : 2SB1241
Q609 : 2SD1863
Q610-613 : 2SC945AA(Q,P)
Q619,620,622,623
: DTC114EUA
D1,2 : RM4ZLF-J1NF
D3,4 : 02DZ16F-Y
D6 : FRH10A20
D7-9,108,152,203-206,
251,260,261,605,
601-603,610-613,615,
616 : 1SS133
D10,101,102,104-107,
229,253-255,295,617
: LM1MA142WK-G
D103 : UMZ6.8N
D109 : 02DZ5.1F-Y
D604,614 : 02DZ10F-Y
D606 : 02DZ15F-Y
D607 : 02DZ6.8F-Y
D608 : 02DZ12F-Y
GND LINE
SIGNAL LINE
B LINE
B LINE
2/2
X08-A/2
CN8
2/2
X08-B/2
J1
SPEAKER
OUTPUT
D5 FCH10A20:
BASS BOOST
TEMPERATURE
DETECTOR
DC/DC CONV.
DC/DC CONV.
P-CON CONT.
MUTE
DRV.
FAN +B
IC5
IC9
IC8
KAC-7202/7252 (1/2)
A
B
10K
10K
10K
10K
10K
10K
10K
10K
10K
10K
10K
10K
10K
10K
+15.2V
-15.2V -15.2V
+15.2V
4.0V
10.0V
0V
15.2V
4.0V
0V
12.7V
0V
12V
3.3V
0V
2.4V
5.0V
0V
0.46V
14.2V
0V
14.2V
5.0V
4
V
4
V
14.4V
14.2V
C1
10u 25V
3
8
TP39
TP40
TP41
TP42
TP43
TP44 TP46
TP59
TP60
TP65
TP66
TP67 TP68
TP69
TP70
TP71
TP72
TP73
TP74
TP75
TP76
TP77
TP78
TP79
TP80
TP81
TP82
TP83
TP84
TP85
TP86
TP87
TP88
TP89
TP91
TP92
TP94
TP95
TP96 TP97
TP98
TP99
TP100
TP103
TP104
TP105
TP106
TP107
TP108TP109
TP110
TP111
TP112
TP113
TP114
TP115
TP116
TP118
TP119
TP120
TP121
TP122
4
TP125
TP126
TP141
TP142
TP144 TP145
TP146
TP147
TP148
TP149
TP150 TP151 TP152 TP153
TP155
TP156
TP157
TP158
TP159
TH602
TH601
L3
3
4
21 8
6
57
1K
R151
10u50
C155
10u50
C135
47P
C140
10u50
C144
C145
0.1
C139
∗
W501
∗
W502
10u50
C142
10u50
C615
10u50
C617
100K
R643
47u25
C132
10u50
10u50
C126
K
8
10u50
C604
10u50
C605
1K
R627
4.7K
R607
33K
R609
100
R603
10K
R604
30K
R610
3.6K
R612
3.6K
R611
3.9K
R616
L1 18uH
L2 18uH
1/2W
10u50
C603
1/2W
R29 10
R613 1.5K R614 3.3K
47K
R602
10u50
C618
10u50
C602
33u25
C601
10K
R606
C10
3900u16
C11
4.7K
R9
4.7K
R10
10
R11
56
R14
56
R13
47u25
C15
330K
R20
R18 27K
2.2u50
C13
R22 91K
10K
R23
10u50
C16
10K
R19
R21 10K
1/2W 2200P
C18R30 10
5
6
7
2
4
3
8
1
4
8
3
21
5
67
1K
R152
10u50
C136
330
R158
4.7
R619
1
2
3
4
5
6
7
8
IN1+
IN1-
FBACK
DTC
CT
RT
GND
C1
16
15
14
13
12
11
10
9
IN2+
IN2-
REF
OUTCTRL
VCC
C2
E2
E1
7
6
5
4
3
2
1
BATT
GND
P-CON
LCH+
LCH-
RCH-
RCH+
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LOGO-LED
FAN+B
-15V
+15V
BB-R
ISO-GND-2
BB-L
D-GND
ISO-R
ISO-GND-1
ISO-L
VR1-R
RCA-G
VR1-L
10K
R608
1500P
C9 1500P
C8
1/2W
10
R7
1/2W
10
R8
0.1
C134
16K
R150
1
2
3
7 4
5 6
VCC
14 13 12 8 11 10 9
GND
VCC
7GND 8
10u50
16K
R149 0.1
C133
2.4K
R159
330
R157
10K
R142
22K
R163
47K
R165
22K
R164
47P
C141
10u50
0.1
C138
180
R168 180
R167
470K
R147
22K
R135
10K
R143
22K
R162
47K
R166
AMP L
AMP R
1K
R651
33K
R650
1K
R648
7.5K
R642
100K
R647
18K
R646
100K
R618
1.5K
R657
27K
R653
3.9K
R652
TH605
27K
TP90
R656
0.01
C614
3900u16
TP117
C17
R25
16K
R24
6.8K
1000P
100K
R26
1K
R27
R17 27K
TP102
TP101
10K
R622
680
R626
0.1
C14
3.9K
R615
0
.
01
2.2K
R406
R28 10
0.047
C20
0.047
C19
10K
R623
33K
R605
10
R12
13
14
2
4
R624 150K
150K
R625
13
14
1
3
2
6
4
5
4
3
1
4
2
3
1
2
+15V
+15V
+15V
+15V
+B
+B
+B
+B
-15V
-15V
-15V
-B
-B -B
1.5K
R15
1.5K
R16
KAC-7252(J)
KAC-7202(K)
MODEL NAME J1
E63-0921-05
E63-0926-050-11
0-10
UNIT
No.
NO
YES
A
YES
NO
502
W501,
E63-0843-05
J3
E70-0838-05
KAC-7252(K)
KAC-7252(M)
KAC-7252(E)
2.4K
R160
R649 47K
10u50
C125
22K
R134 +22K
R16110u50
C143
+
++ +
+
+
+ +
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
X09-5830-1x A/2 (2/2)
B
C
E
B
EC
2SA965-F
2SA992-A
2SC1845-A
2SC2235-F
2SA1576A
2SC3419
CAUTION:Forcontinuedsafety,replacesafety
critical components only with manufacturer’s
recommended parts (refer to parts list).
Indicates safety critical components. To re-
duce the risk of electric shock, leakage-current
or resistance measurements shall be carried
out (exposed parts are acceptably insulated
from the supply circuit) before the appliance is
returned to the customer.
•DC voltages are as measured with a high
impedance voltmeter. Values may vary
slightly due to variations between individual
instruments or/and units.

KAC-7202/7252
8
KLMNO
1 2 3 4 5 6 7
-15.0V
15.0V
15.0V
15.0V
15.0V 15.0V
15.0V
-15.0V -15.0V -15.0V
-15.0V-15.0V-15.0V
(X09- ) (B/2)
KAC-7202/7252 (2/2)
(X08-4190-xx) (A/2)
(X08-) (B/2)
WIRE REMOTE CONTROL UNIT
A
B
EXCEPT USED KAC-7202(K)
(X08-4190-xx)
WH1
D609
S1
: LM1MA142WK-G
: RC4580IDR
CN8
(2/2)
IC3
(1/2)
IC3
(1/2)
IC1
(1/2)
IC2 (1/2)
IC4
(1/2)
IC5 (1/2)
IC6
(2/2)
IC2
(2/2)
IC7
(1/2)
IC7
(2/2)
IC1
S6
INPOUT
SENS.
ST/MONO
(2/2)
IC4 (2/2)
IC5 (2/2)
IC6
PHASE
INVERTER
∗
A
D614
IC1-7
LEVEL
FREQ.
J1
D614
CN3
CN1
1/2
CN1
X09-A/2
X09-A/2
1/2
J4
GND LINE
SIGNAL LINE
B LINE
B LINE
HPF/OFF/LPF
D609 : B30-1601-05
LPF
HPF BASS BOOST
FAN
KAC-7252(J)
KAC-7202(K)
MODEL NAME
0-11
0-10
UNIT
No.
YES
NO
A
NO
YES
152
W151,
3
1
2
C613
0.01
TP210TP211
VR4
87
TP121
TP157
TP106
TP117
TP119
TP158
TP160
TP162
TP114
TP159
TP127
TP156
TP153
TP107
TP154
TP163
TP161
TP118
TP116
TP115
TP105
TP152
TP155
TP5
TP1
TP126
VR102
∗
W151
LPF G=+10DB 24DB/oct F=-VRcont(50-200Hz)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LOGO-LED
FAN+B
-15V
+15V
BB-R
ISO-GND-2
BB-L
D-GND
ISO-R
ISO-GND-1
ISO-L
VR1-R
RCA-G
VR1-L
3
1
4
6
5
2
7
8
9
50K(C)
VR152
6
4
573
28
1
1
2
3
8
1
3
28 1
3
28 1
3
28 1
3
28
6
5
4
75
64
75
64
75
64
7
5
64
7
82
31
5
6
4
7
101
2
4
39
8
7
56
5
6
4
2
1
3
50K(C)
VR101
4
32
5
1
9
8
6
7
3
1
7
6
4
8
9
2
5
10K
R123 47K
0.1
C103
8.2K
R105
0.22
C105 10u50
C107
0.1
C104
9.1K
R108
0.22
C106
8.2K
R106
10u50
C108
47K
R110
15K
R152
15K
R153
0.1
C152
3.3K
R154
0.15
C153
2.2K
R156 47K
R157
15K
R155
0.022
C154
7.5K
R158 10K
R159
0.1
C155
0.15
C156
2.2K
R160 220K
R161
10u16
C158
0.01
C112
0.01
C113
6.2K
R121
10K
R122
4.3K
R128
0.01
C53
10u50
C54
3K
R129
2.2K
R131
3K
R130
0.01
C51
10u50
C52
10K
R133
39K
R137 0.1
C109
39K
R138
R136
0.01
C60
0.01
C59
39K
R142
39K
R141
0.1
C115
22K
R147
10u50
C123
16K
R146
0.1
C116
10u50
C124
22K
R148
22K
R144
0.01
C58
0.01
C57
47P
C118
TP2
TP3
TP15
TP164
TP9
TP8
TP10
TP11
TP12
TP14
L
R
R124 47K
R109 56K
R111 47K
9.1K
R107
TP113
2.2K
R132
0.1
C110
10K
R134
10K
4.7K
R126
18K
R139
16K
R145
47P
C117
∗
W152
R
L
HPF,12dB/oct,F=VRcont(50-200Hz)
12K
R162
56K
R104
47K
R163
TP60
10K
VR61
TP63
R623
2K
TP64
VR62
10K
R624
8.2K
TP62
TP65
3
4
2
TP61
1
TP13
10
3
2
1
R604
R603
10
10u50
C604
C603
47u25
C602
0.01
1
2
820
R601
KAC-7252(K)
KAC-7252(M)
KAC-7252(E)
22K
R143
+15V
-15V
+15V
-15V
+15V +15V
-15V -15V-15V
C157 0.033
R135 10K
R140 18K
S6
TP7
+
+
+
+
++
+
+
+
X08-4190-1x (1/1), X09-5830-1x B/2 (1/1)
2SB1375-F 2SD2012-F 2SC4081 DTA114EUA DTC114EUA
CAUTION : For continued safety, replace safety critical components only with manufacturer’s recom- mended parts (refer to parts list).
Indicates safety critical compo-
nents. To reduce the risk of electric shock, leakage-current or resis- tance measurements shall be car- ried out (exposed parts are accept- ably insulated from the supply cir- cuit) before the appliance is re- turned to the customer.
•DC voltages are as measured with a high
impedance voltmeter. Values may vary slightly due to variations between individual instru- ments or/and units.

KAC-7202/7252
9
Parts with the exploded numbers larger than 700 are not supplied.
EXPLODED VIEW
3
2
1
BA
KAC-7252
X08-419
X09-583
X09 B/2
A
B
C
D
E
F
G
H
J
K
L
M
N
M6x10
M4x9
φ3x12
φ4x8
M4x8
φ2x8
φ3x10
φ2x6
φ3x8
φ3x16
φ3x14
φ3x6
φ3x8
: N07-0003-08
: N09-4214-08
: N09-6216-05
: N09-6218-05
: N09-6287-05
: N80-2008-43
: N80-3010-43
: N82-2006-48
: N89-3008-48
: N89-3016-48
: N09-6217-05
: N83-3006-43
: N89-3008-43
X08-419 B/2
13 25
28
27
22
17
9
3
27
29
14
1
10
19
724
731
738
20
F1
PA1
736
737
FC1
724
8
26
26
731
PA2
F
Ex2
Cx3 Hx3
Jx2
Jx2
Cx3
Lx5
Lx9
Lx6
Gx2
Gx2
Jx3
Jx2
Jx2
Jx3
Jx3
G
J
J
MDG
Nx2
Nx3
Cx4
Cx2
J
N
B
A
N
732
704
735
739
N
N
J
Jx2
K
K
J
Ex2
Ex2
Ex2
Bundled to the
transistor.
J1
J3J4J2

KAC-7202/7252
10
Indicates safety critical components.
✽New parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
dN
e
wParts No. Description Desti-
nation Ref. No. A
d
dN
e
wParts No. Description Desti-
nation
K: KAC-7252 K1 : KAC-7202 (North America)
E1 : KAC-7252 (Europe) M1 : KAC-7252 (Other Areas)
PARTS LIST
11A ✽ A02-2738-02 PLASTIC CABINET (REMO) KE1M1
21B ✽ A21-4463-02 DRESSING PANEL KE1M1
21B ✽ A21-4525-02 DRESSING PANEL K1
31B
✽ A21-4467-02 DRESSING PANEL K
31B
✽ A21-4468-02 DRESSING PANEL K1
31B
✽ A21-4526-02 DRESSING PANEL E1M1
PA1 3B
✽ A64-3535-02 PANEL KE1M1
PA1 3B ✽ A64-3540-02 PANEL K1
PA2 2A
✽ A64-3541-12 PANEL (REMO) KE1M1
71B ✽ B03-5042-02 DRESSING PLATE KE1M1
71B ✽ B03-5043-02 DRESSING PLATE K1
82A
✽ B03-5049-04 DRESSING PLATE (REMO) KE1M1
91B ✽ B07-3130-12 ESCUTCHEON
10 2A
✽ B19-2324-03 LIGHTING BOARD
-B46-0100-50 WARRANTY CARD
-
✽ B58-1427-04 CAUTION CARD
-
✽ B64-3011-00 INSTRUCTI.MANUAL (ENG.FRE.SPA.) KE1K1
- ✽ B64-3012-00 INSTR.MANUAL (GER.DUT.ITA.POR.) E1
-
✽ B64-3013-00 INSTRUCTION MANUAL (ENG.T-CHI.) M1
13 1A E30-6145-05 CONNECTING CORD ASSY
14 1A E30-6240-15 MODULAR CABLE
KE1M1
FC1 2B ✽ E39-0699-15 FLAT CABLE
17 1B F01-1770-11 HEAT SINK
19 2B F09-1885-15 FAN
20 2B
✽ F09-1958-04 SHEET
F1 3B F52-0016-05 FUSE (BLADE TYPE) 40A
22 1B
✽ G11-3647-04 CUSHION
-
✽ H10-4932-03 POLYSTYRENE FOAMED FIXTURE
-H25-1199-04 PROTECTION BAG
-H25-1200-04
PROTECTION BAG (250X350X0.03)
- ✽ H25-1216-04 PROTECTION BAG (REMO) KE1M1
- ✽ H54-3401-03 ITEM CARTON CASE K
-
✽ H54-3402-03 ITEM CARTON CASE E1
-
✽ H54-3403-03 ITEM CARTON CASE K1
-
✽ H54-3404-03 ITEM CARTON CASE M1
25 1A
✽ J22-0301-14 MOUNTING HARDWARE (REMO) KE1M1
26 2A ✽ K23-1093-03 KNOB (REMO) KE1M1
27 1A ✽ N99-1759-05 SCREW SET
28 1A
✽ N99-1766-05 SCREW SET (REMO) KE1M1
A3BN07-0003-08 SEMS M6 (Au)
B3BN09-4214-08 SEMS M4 (Au)
C2BN09-6216-05 TAPTITE SCREW (3X12)
D3BN09-6218-05 TAPTITE SCREW (4X8)
E1B
✽ N09-6287-05 DRESSED SCREW (M4X8)
F1AN80-2008-43 PAN HEAD TAPTITE SCREW
KE1M1
G3BN80-3010-43 PAN HEAD TAPTITE SCREW
H2BN82-2006-48
BINDING HEAD TAPTITE SCREW
J3BN89-3008-48 BINDING HEAD TAPTITE SCREW
K2BN89-3016-48 BINDING HEAD TAPTITE SCREW
29 1A W01-1606-05 ACCESSORIES
C51 CK73GB1H103K CHIP C 0.010UF K
C52 CD04BJ1H100M ELECTRO 10UF 50WV
C53 CK73GB1H103K CHIP C 0.010UF K
C54 CD04BJ1H100M ELECTRO 10UF 50WV
C57-60 CK73GB1H103K CHIP C 0.010UF K K1
C103,104 CK73GB1C104K CHIP C 0.10UF K
C105,106 CK73FB1C224K CHIP C 0.22UF K
C107,108 CD04BJ1H100M ELECTRO 10UF 50WV
C109,110 CK73GB1C104K CHIP C 0.10UF K K1
C112,113 CK73GB1H103K CHIP C 0.010UF K
C115,116 CK73GB1C104K CHIP C 0.10UF K K1
C117,118 CC73GCH1H470J CHIP C 47PF J K1
C123,124 CD04BJ1H100M ELECTRO 10UF 50WV
C152 CK73GB1C104K CHIP C 0.10UF K
C153 CK73FB1C154K CHIP C 0.15UF K
C154 CK73GB1E223K CHIP C 0.022UF K
C155 CK73GB1C104K CHIP C 0.10UF K
C156 CK73FB1C154K CHIP C 0.15UF K
C157 CK73GB1E333K CHIP C 0.033UF K
C158 CD04AS1C100M ELECTRO 10UF 16WV
C602 CK73GB1H103K CHIP C 0.010UF K
C603 CD04BJ1E470M ELECTRO 47UF 25WV
C604 CD04BJ1H100M ELECTRO 10UF 50WV
CN1 E41-0941-05 PIN ASSY
CN3 E41-0942-05 PIN ASSY
CN8
✽ E41-2277-05 FLAT CABLE CONNECTOR
J1
✽ E58-0966-15 RECTANGULAR RECEPTACLE KE1M1
R104 RK73GB2A563J CHIP R 56K J 1/10W
R105,106 RK73GB2A822J CHIP R 8.2K J 1/10W
R107,108 RK73GB2A912J CHIP R 9.1K J 1/10W
R109 RK73GB2A563J CHIP R 56K J 1/10W
R110,111 RK73GB2A473J CHIP R 47K J 1/10W
R121 RK73GB2A622J CHIP R 6.2K J 1/10W
R122 RK73GB2A103J CHIP R 10K J 1/10W
R123,124 RK73GB2A473J CHIP R 47K J 1/10W
R126 RK73GB2A472J CHIP R 4.7K J 1/10W
R128 RK73GB2A432J CHIP R 4.3K J 1/10W
R129,130 RK73GB2A302J CHIP R 3.0K J 1/10W K1
R131,132 RK73GB2A222J CHIP R 2.2K J 1/10W K1
R133-136 RK73GB2A103J CHIP R 10K J 1/10W K1
R137,138 RK73GB2A393J CHIP R 39K J 1/10W K1
R139,140 RK73GB2A183J CHIP R 18K J 1/10W K1
R141,142 RK73GB2A393J CHIP R 39K J 1/10W K1
R143,144 RK73GB2A223J CHIP R 22K J 1/10W K1
R145,146 RK73GB2A163J CHIP R 16K J 1/10W K1
R147,148 RK73GB2A223J CHIP R 22K J 1/10W K1
R152,153 RK73GB2A153J CHIP R 15K J 1/10W
R154 RK73GB2A332J CHIP R 3.3K J 1/10W
R155 RK73GB2A153J CHIP R 15K J 1/10W
R156 RK73GB2A222J CHIP R 2.2K J 1/10W
R157 RK73GB2A473J CHIP R 47K J 1/10W
R158 RK73GB2A752J CHIP R 7.5K J 1/10W
PREAMPLIFIER UNIT (X08-4190-1x)
KAC-7202/7252