Kenwood KAC X20 - eXcelon Amplifier User manual

© 2006-12 PRINTED IN JAPAN
B53-0484-00 (N)584
POWER AMPLIFIER
KAC-X20
SERVICE MANUAL
This product uses Lead Free solder.
Accessories
(W01-1606-05) Screw set (N99-1794-05)
Dressing Panel
(A21-6570-01)
Fuse (30A)
(F52-0015-05)

KAC-X20
2
BLOCK DIAGRAM
L
IC1
40-200Hz
HPF
40-200Hz
LPF
IC3
MO/ST
IC12
ISO AMP
L
LINE IN
LINE OUT
LPF/OFF/HPF
FILTER
IC2
15,25Hz
ISF
IC4,5 IC7-9,13.15
BASS
40-100Hz
BOOST MUTE
Q241 Q201-229
POWER AMP
SP OUT L
OFF/15/25
ISF
SENS
-1
40-200Hz
LINE OUT R
IC16
ISO AMP
LINE IN R HPF
IC1
SP OUT R
40-100Hz
15,25Hz
IC4,5
IC2 ISF BASS
BOOST Q201-229
MUTE
Q242
Q601-606
CONTROL
IC5,Q3-14
D.D. CON.
P-CON
BATT
GND
Q1,2,16-18
AVR
f,GAIN
CONTROL
REMOTE
GAIN=0-18dB
f=40-100Hz
15V
(X08-432)
COMPONENTS DESCRIPTION
●PREAMPLIFIER UNIT (X08-4320-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 HPF
IC2 Phase inversion amplifier (Lch only)
IC3 LPF
IC4 I.S.F 15Hz
IC5 I.S.F 25Hz
●AUDIO UNIT (X09-8570-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC5 DC/DC converter
IC6 Temperature detection comparator
IC7,8,13 Bass boost amplifier
IC9 For bass boost gain and frequency adjustments
IC12,16 Input isolation amplifier
IC15 Bass boost mix amplifier
Q1,2 ±15V AVR
Q3~8 FET for DC/DC converter

KAC-X20
3
Ref. No. Application / Function Operation / Condition / Compatibility
Q9~12 FET driver for DC/DC converter
Q13,14 FET driver control for DC/DC converter
Q15 Temperature detection control circuit
Q16,17 ±15V for AVR control
Q18 ±15V AVR constant current
Q201~204 Power amplifier initial stage differential operation
Q205~208 Power amplifier second stage differential operation
Q209,210 Current mirror
Q215~218 Current limiter
Q219 Shock noise prevention circuit
Q220,222~227,229 Power amplifier final stage
Q241,242 Power amplifier mute
Q243,244 Power amplifier initial stage constant current
Q281~284 Power amplifier ATT
Q601,615~618 Shock noise preventing circuit when power is turned on
Q602 P-Con OFF detection
Q603 Mute driver
Q604,605 P-Con control circuit
Q606 Over voltage detection
Q609 Power supply for fan
Q610 Over current detection
Q611,612 DC detection
Q613,614 DC detection For latching
Q621,622 For LED control
COMPONENTS DESCRIPTION
ADJUSTMENT
NO. ITEM ALIGNMENT METHOD ALIGN FOR NOTE
POINT
VR1 (Lch-1) Connect a DC After Power on 5minutes
1IDEL VR3 (Lch-2) voltmeter between 2.0mV Since there are interferences between Lch-1 and
CURRENT VR4 (Rch-1) check land Lch-2, or between Rch-1 and Rch-2, please repeat
VR2 (Rch-2) (Refer to PC BOARD) 1 and 2 several times for adjustment.

KAC-X20
4
ABCDE
1
2
3
4
5
6
7
R1
R31
R45
R51
R120
R267
R268
R637
R32
R121
R52
R636 R4
R280
R629
R660
R664
R406
R622
R626
R610
R612
R615
C108
R152
R167
R215
R216
R217
R218
R608
R609
R661
R669
R168
C146
C147
C148
C153
C101 C102
C103 C110
R103 R104
R107 R108
R112
R113
C41 C42
R116
R117
C113
C114
W345
C138C139
C203
C204
C225
C226
C263
C264
C609
C610
C614
C616
R2
R47 R48
R43
R44
R46
R165
R166
R203
R204
R227
R228
R286
R606
R613
R614
R633
R634
R646
R649
R659
R665
R666
R667
R668
C21
C22
C39
C40
TH601
C55
C56
C111
C112
C115
C116
C141
C205
C206
C23
R36
C211
C212
C213
C214
C217
C218
C220
C221
C222
C227
C228
C607
C613
13
C901
C902
R33
R40
R41
R105
R106
R109
R110
R115
R118
R119
R136
R137
R157
R158
R160 R163
R164
R205
R206
R207
R208
R209
R210
R219
R220
R221
R222
R223
R224
R230
R231
R232
R234
R235
R236
R238
R240
R241
R242
R249
R250
R253
R254
R262
R263
R264
R265
R266
R272
R273
R274
R275
R276
R282
R284
R285
R287
R288
R289
R290
R603
R604
R605
R607
R611
R617
R618
R619
R620
R621
R623
R624
R627
R628
R630
R631
R632
R635
R638
R639
R643
R647
R648
R651
R652
R653
R656
R657
R658
R662
R663
W344
C140
C133
C134
C127
C128
R226 R260
R132
R133
R149
R150
R159
R142
W348
R143
R140
R141
R39
R38
R134
R138
R135
R139
R37
W341
W334
W312
R3
R114
W322
W342
W31
1
W329
W316
W313
W330
W338
W335
R244
R252
C54 R50
R625
W315
W343
W325
W331
W326
W321
W319 W318
W352
W350
W349
W351 W347
W320
W323
W339
W327
W317
W324
W314
W328
W332
W333
W336
W337
W340
W346
R111
C106
C109
R122
C107
R151
14
85
14
58
58
14
85
41
85
41
14 8
71
814
17
IDLE R2
IDLE R1
RED
W98
C2
C12
C224
W109
C3
C5
C611
C617
C618
W150
W63
C606
W69 W66
R5
C58
R170
13
42
C137
C57
C143
C142
W68
C229
R901
C4
C20
C129
W178
W123
C156
W101
C207
C208
C223
C601
C602
C603
C604
C605
C608
W155
R179
W96 W90 W86
C104
C105
C117
C118
C125
C126
C135
C136
C144
C145 C201
C202
C215
C216
R29
R101
R102
R169
R171
R243
R246
R247
R248
R258
R616
W175
W65
W177
W127
R212
R211
R214
W169
W100
C43
W176
113
214
C53
C44
W99
W102
W103
C210 C209
R201
R202
R213
R161
R162
W83
W104
W62
W163
W59 W58
W80
W141
W84
W105
W89
W114
W106
W170
W113
W162
W154
W168
W146
W156
W142
W161
W160
W61
W144
W71
W76
W77
W79
W67
W122
W135
W82
W119
W64
W110
W81
W111
W70
W115
W117
W120
W152
W159
W132
W131
W133
W129
W137
W138
W124
W125
W60
W126
W147
W145
W148
W87
W91
W85
W72
W73
W74
W75
W97
W116
W118
W121
W108
W112
W92
W93
W94
W95 W78
W149
W143
W153
W167
W130
W164
W88
W174
W172
W136
W139
W107
W171
W151
W140
W134
W157
W128
W166
W165
W173
W158
EB
BE
BE
BE BE
EB
EB
BE BE BE
BE BE
BE
BE
BE BE BE BE
SD
EB EB
BC
K
AB
E
EBC
K
AB
E
E
BC K
AB
E
EEC
B EK
B A
EC
B EK
B A
G
BE
14
85
B
E
BEBE
BEBE
BEBE
BE
BE
BE
BE
BE
BE BE
BE
BEBE
B
BE
EBE
BEBE
BE
D101
D201
D109
D102
Q621
D103
D3
D604
D608
D614
Q17
Q241
Q242
Q281
Q282
Q283
Q284
Q602
Q605
Q606
Q622
D229
D253
D254
D255
D262
D295
D606
D607
D609
Q16
Q243
Q244
Q603
Q614
Q615
Q616
Q617
Q618
Q219
Q1 Q2
Q222 Q225
Q226
Q610
Q604
Q609
Q220
Q224
D108
D611
D615
D617
Q611
Q612
Q613
D2
D4
D152
D202
D204
D205
D206
D208
D209
D210
D251 D260
D261
D601
D602
D603
D605
D610
D612
D613
D616
J4
Q201
Q202
Q203
Q204
Q205
Q206
Q207
Q208
Q209
Q210
Q216
Q217
Q218
Q601
Q18
P1
D618
J1
CN1
WH1
IC12 IC16
IC6
IC13
IC15
IC8
IC9
IC7
AUDIO UNIT X09-8570-10 A/2 (J76-0346-11)
X09 B/2
VR4
VR2
DC voltmeter
Rch-2 2.0mV
DC voltmeter
Rch-1 2.0mV
PC BOARD (FOIL SIDEVIEW)

KAC-X20
5
JIHGF
1
2
3
4
5
6
7
X09-8570-10
Ref. No. Address
IC5 5I
IC6 4D
IC7 6C
IC8 6D
IC9 6D
IC12 5B
IC13 5D
IC15 5C
IC16 5C
Q1 2D
Q2 2E
Q3 3H
Q4 4H
Q5 4H
Q6 4H
Q7 4H
Q8 5H
Q9 5I
Q10 5I
Q11 5H
Q12 5I
Q13 5I
Q14 5H
Q15 5I
Q16 2D
Q17 2D
Q18 2D
Q201 4C
Q202 4C
Q203 4C
Q204 4C
Q205 3C
Q206 3C
Q207 3C
Q208 3C
Q209 3C
Q210 3C
Q215 2G
Q216 4C
Q217 2E
Q218 2C
Q219 4C
Q220 4B
Q222 2C
Q223 2G
Q224 4B
Q225 2E
Q226 3B
Q227 2G
Q229 2F
Q241 4C
Q242 4C
Q243 4C
Q244 4C
Q281 4C
Q282 5C
Q283 4D
Q284 5C
Q601 5D
Q602 5E
Q603 5D
Q604 5F
Q605 5F
Q606 5E
Q609 6E
Q610 3E
Q611 5E
Q612 5E
Q613 5E
Q614 4E
Q615 3D
Q616 3D
Q617 3D
Q618 3D
Q621 5E
Q622 5E
R35
R49
C14 R9
R10
R15
R16
R18
R22
R24
R34
R614
TH602
C219
C221
R11 SDGSDGSDGSDGSDG
SDG R12
R13
R14
R17
R19
R20 R21
R23
R25
R26
R27
R53
R54
R55 R56
R57
TH605
R229
R233
R237
R239
53
R261
R271
R611
R620
R621
R650
R653
R656
W304
R251
R225
W301
W312
W311
W303
W309 W305
W307
W308
W302
W310 W306
916
18
IDLE L1
IDLE L2
C6 R6
C10
C11
L3
C16
R5
C1
C8
C9
C17
C19
C608
C24
C13
C15
C18
R7 R8
R28
2
9
R30
R155
R245
R257
W1
W3
W7
W8
W9
W18
W10
W11
W12
W13
W14
W15
W16
W17
W4
W5
W59 W58
W39
W41
W35
W37
W38
W40
W43
W44
W46 W48
W52
W54
W34
W21
W20 W19
W50 W53
W47
W57
W36 W28
W61
W22
W32
L1
W2
W60
C7
W49
W51
W45
W605
W603
W604
W602
W601
W25
W26
W27
W33
W24
W29 W30
W31
W23
W6
W42
W56 W55
L2
BE BE
EB
BC
K
AB
E
EEC
B
EK
B
AEC
B
EK
B
A
BE
BEBE
BEBEBEBE
BE BE
Q9
Q12
Q15
Q10
Q11
Q605
Q606
D10
D606
Q13
Q14
D6
5
Q229
Q604
D5
Q223
Q227
D1
D11
J3
D9
Q3
Q4 Q5
Q6 Q7
Q8
D7
D8
D203
D207
D209
D
612
Q215
Q217
P1
CN2
IC5
VR1
VR3
DC voltmeter
Lch-2 2.0mV
DC voltmeter
Lch-1 2.0mV
Refer to the schematic diagram for the values of resistors and capacitors.

KAC-X20
6
KLMNO
1
2
3
4
5
6
7
R4 R1 R2
R3
R11
R12
R8
R9
R10
R14
C3
R15 R16
R123 R124
R126
R129
R130
R147
R148
R631
C4
C602
C2
C153
C156
R104 R109
R110 R111
R131
R132
R135
R136
R139
R140
R141
R142
R143
R144
R163
C1
R145
R146
C5
C6
C103
C104
C105
C106
C154
C157
R5
R6
R7
R13
R17
R18
R105
R106
R107
R108
R121
R122
R128
R133
R134
R137
R138
R152
R153
R155
R156 R157
R158
R160R161
R162
R601
R603
R630
W342
W330
W341
W340
W336
W309
W339
W334
W313
W323
W337
W335
W329
W314
W320 W318
W322
W324
W306
W305
W312
W303
W301
W302
W315
W307
W304
W332
W316
W343
TP167
W321
W311
W310
W308
W317
W331
W333
W338
W319
W326
W327
W325
W328
W34
1
45
8
4
1
8
5
4
1
8
5
8
54
1
8
54
1
VR101
VR152 VR4
MONO
ST
OFF
HP
LP
OFF
15
25
113
12 13
200Hz40Hz
0.2V
5V
40Hz
503 503 103
HPF SENS
ISF FILTER
LPF
C51
C54
C52
C53
C603
C604
C107
C108
C109
C110
C111
C112
C113
C114
C115
C116
C117
C118
C119
C120
C121
C122
C123
C124
C158
W12
W26
W28
W27
142
W23
W25
W24
W19 W20
W17
W13
W16
W15
W11 W10
W18
W4
W3
W5
W8
W9
W1
W21
C7
W7
W6
W2
W22
C8
200Hz
D614
CN8
CN1 CN3
S1
S6
S7
IC1
IC3
IC4
IC5
IC2
PREAMPLIFIER UNIT X08-4320-10 (J76-0351-12)
TP5
TP106
TP2
TP1
TP3
TP107
TP126
TP127
TP105
TP113
TP115
TP116 TP119
TP114
TP117
TP118
TP121
TP159
TP154
TP155
TP156
TP157
TP161
TP162
TP153
TP158
TP160
TP163
TP14
TP7
TP13
Refer to the schematic diagram for the values of resistors and capacitors.
PC BOARD (FOIL SIDEVIEW)
X08-4320-10
Ref. No. Address
IC1 4N
IC2 3N
IC3 5N
IC4 5L
IC5 6L

KAC-X20
7
ABCDE
1
2
3
4
5
6
7
D103
D254
Q207
D102
Q283
Q615
D262
Q226
Q209
D101
Q222
Q205
Q1
Q224
Q2
Q284
Q241
Q216
Q210
Q227
Q3
Q203
Q217
D6
Q282
Q616
Q244
Q17
Q223
Q4
Q
5
D5
D260
D255
Q16
Q220
Q218
Q215
D295
Q206
Q281
Q202
Q243
D253
Q225
Q242
Q229
Q201
D229
Q204
Q6
Q208
J1
Q18
Q
Q219
J4
D4
D204
D208
D206
D210
D205
D209 D207
D203
D611
D617
D2
D3
D109
D108
(2/2)
(2/2)
(1/2)
(2/2)
(1/2)
(1/2)
D201D202
D251
D152
D261
IC12
IC16
IC12
IC16
ISO. AMP
IC7
IC7
R
L
IN
OUT
LR
REMO.
ATT MUTE
DC/DC CONVERTER
MAIN AMP
TP223
TP9
TP8
TP171
TP184 TP179
TP216
TP189
TP128
TP226
TP5
TP170
TP196
TP162
T
TP205
TP217
TP4
TP46
TP54
TP125
TP3
TP183
TP209
TP22
TP163
TP221
TP131
TP193
TP1
TP17
TP225
TP182
TP200
TP121
TP168
TP195
TP224
TP16
TP127
TP178
TP204
TP50
TP202
TP35
TP169
TP188
TP122
TP19
TP192
TP191
TP7
TP215
TP53
TP174
TP199
TP181
TP130
TP207
TP14
TP176
TP177
TP187
TP67
TP218
TP
TP203
TP2
TP220
TP213
TP172
TP55
TP198
TP120
TP180
TP206
TP185
TP56
TP190
TP222
TP214
TP13
TP186
TP197
TP129
TP15
TP6
TP194
TP173
TP126
TP175
L3
1.4mA
4
3
2
1
10u50
C104
470P
C101
470P
C102
10K
R108
1.5K
R105
1K
R102 10u50 C105
1K
R101
1.5K
R106
1000P
C110
7P
C23
100
R36
10K
R115
10K
R112
100P
C114 100P
C113
C115 100P
C116 100P
22u50
C118
100
R41
22u50
C117
100
R40
10K
R114
10K
R137
7P
C107 220 R122
2.2
R120
2.2
R121
39K
R140
10u50
C129
10u50
C156
470
R39
R179 10
R171 10K
R169 10K
C147 100P C148 100P C153 100P
10u50
C53
10u50
C44
10u50
C137
47
R11
R54R55
47
R12
3300u16
C10
1000P
C9
1/2W
10
R8
47u25
C2
10u50
C12
18K
R1
10K
R2
47u25
C4
4700u56
C6
4700u56
C7
12K
R4
1u50
C611
10u50
C617
10u50
C618
47u25
C3
10u50
C5
150K
R637
100
R289
10u50
C215
1000P
C219
2.2K
R229
2W
0.1
R155
VR1
220
VR3
220
2W
0.1
R245
150
R251
2W
0.1
R247
2W
0.1
R257
1000P
C221
2.2K
R231
100
R235
470P
C225
10P
C209
4.7K
R219
4.7K
R221
3.9K
R268
3.9K
R267
100u10
C224
100
R215
100
R217
4.7K
R241
4.7K
R286
47P
C227
10u50
C201
1K
R288
1K
R211
47u25
C207
1.5K
R205
1.5K
R207
100
R223
10
R280
100u63
C223
100u63
C229
100
R224
470P
C226
22P
C214 22P C218
1.5K
R206
1.5K
R208
47u 25V
C208
1K
R212
4.7K
R222
4.7K
R220
22K
R214 100 R290
10u50
C202
4.7K
R242
100
R254
10u50
C216
VR2
220 220
VR4
1000P
C222
1000P
C220
2.2K
R232
2.2K
R230
150
R260
2W
0.1
R248
2W
0.1
R246
150
R226
2W
0.1
R258
2W
0.1
R243
100
R216
100
R234
100
R240
47
R668 47
R667
47K
R620
12K
R617
100u10
C606 14
13
12
OP+INB
OP-INB
1
2
3
OP+INA OP-INA
2
1OP+INA OP+INB
3
4
5
6
7GNDV+
EVOUTA OP-INA OPOUTA VCNTA VCNTB
EVOUTB
OPOUTB
OP-INB
VREF
REFIN
13 14 11 12 8 9 10
820
R3
86
4
57
10K
R136
2
31
4
2
31
8
1
4
8
3
2
12K
R109
6
57
15P
C111
10K
R107
15P
C901
15P
C902
15P
C112
10K
R103
10K
R104
7P
C55
100
R47
100
R48
7P
C56
7P
C106
220
R111
C109 0.01
C108 0.01
1K
R901
7P
C39
7P
C40
R118 10K
R119 10K
10P
C41
330
R151
10P
C42
330
R152
5
67
10K
R117
10K
R116
10K
R113
R110 12K
0.1
C103
1.5K
R132
1.5K
R133
0.047
C127
470
R38
0.047
C128
39K
R141
4.7K
R139
4.7K
R138
100P
C146
R44 24K
R43 24K
22K
R170
18K
R274
22K
R287
10K
R227
10K
R228
TP201 TP208
22K
R285
18K
R273
10K
R275
10K
R282
10K
R265
10K
R276
10K
R284
10K
R266
-3dB
-1.5dB
MUTE
22K
R203
220P
C203
100
R209
4700P
C205
330P
C211
1.5K
R263
220P
C263
10K
R201
22P
C213
22P
C217
22K
R213
4700P
C206
100
R210
10K
R202
220P
C204
22K
R204
47P
C228
330P
C212
220P
C264
1.5K
R264
TP219
10K
R244
100
R218
100
R253
220
R261
2.2K
R249
2.2K
R237
100
R233
100
R239
220
R271150
R225
10P
C210
100
R236
2.2K
R250
220
R262
220
R272
2.2K
R238
47K
R252
0.01
C21
10K
R31
3.3K
R638
3.3K
R628
100K
R636
100
R37
3.3K
R669
33K
R5
33K
R6
1/2W
10
R7
1000P
C8
100
R33
0.01
C22
R32 10K
10K
R63910K
R623
2200P
C18
1/2W
10
R30
R629
47K
R621
R665R666
MUTE
-3dB
-1.5dB -1.5dB
-3dB
+15V
+15V
+15V
-15V
-15V
-15V
+47.4V
+47.4V
+47.4V
-47.4V
-47.4V
-47.4V
+
+
+
+
+
+
+
+
+
+
+ +
+
+
+ + +
+
+
+
+
+
+
+
++
+
+
+
+
IC9IC8
AUDIO UNIT (X09-8570-10)
-15.2V
15.2V
-15.2V
15.2V
15.2V
2.5V
2.5V
2.5V
2.5V
5.0V
2.5V
0V
2.5V
2.5V
2.5V
2.5V
0-3.0V
5.0V
15.2V
0V
25V
2.5V
2.5V
2.5V
2.5V
25V
5mA 2.5mA
2.5mA
47.4V
15.2V
-47.4V
-15.2V
5mA
X09-8570-10 (1/2)

KAC-X20
8
JIHGF
1
2
3
4
5
6
7
Q602
Q622
Q14
Q615
Q603
Q7
Q
3
Q8
Q601
Q12
Q10
Q616
Q9
Q605
D10
Q
4
D613
Q5
Q15
Q609
Q613
Q604
Q621
Q617
Q612
D615
Q618
Q606
Q611
Q11
Q13
Q6
Q614
P1
Q610
D8
D9
CN1
J3
D1
D11
D607
D606
D605
D604
D603
D602
D618
D608
D601
D614
POP NOISE-MUTE
D610
D612
D616
D7
IC6
IC6
1.5V
1.9V
(2/2)
(1/2)
(1/2)
(2/2)
IC13
IC15
IC13
IC15
(1/2)
(2/2)
1.1V
SP OUT
CN2
IC5 : TL494IDR
IC6,7,12,13,15,16 : BA4560RF
IC8,9 : NJM2172V-ZBTE2
Q1 : 2SD2012-F
Q2 : 2SB1375-F
Q3-8 : STP60NF06FP
Q9,12 : 2SC4097
Q10,11 : 2SA1577
Q13,14,621 : DTA114EUA
Q15,16,241,242,
281-284,602,605,606,
616,618 : 2SC4081
Q17,219,243,244,603,
614,615,617 : 2SA1576A
Q18 : 2SK246(BL)-F
Q201-204,217,218 : 2SA992-A(F,E)
Q205-208 : 2SC3478AA(L,K)
Q209,210 : 2SA1376AA(L,K)
Q215,216,601,610 : 2SC1845-A(F,E)
Q220,223,224,227 : TRAIT9N
Q222,225,226,229 : TRAIT9P
Q604 : 2SB1241
Q609 : 2SD1863
Q611-613 : 2SC945AA(Q,P)
D1,11 : RM4ZLF-J4NF
D2,4,7-9,108,152,202-210,
251,260,261,601-603,605,610-613,
615-618 : 1SS133
D3,109,201 : UDZS5.1B
D5 : FCH10A20
D6 : FRH10A20
D10,101,253,255
: LM1MA142WK-G
D103 : UMZ6.8N
D604,614 : UDZS10B
D606 : UDZS15B
D607 : UDZS6.8B
D608 : UDZS12B
GND LINE
SIGNAL LINE
B LINE
B LINE
DTC114EUAQ622 :
X08-
CN8
2/2
BASS BOOST
FAN+B
DC OFFSET DET
DC/DC CON.
TEMPERATURE
DET. COMPARATOR
D102,229,254,262,295
LM1MA142WA-G:
TP75
TP98
TP144
TP87
TP155
TP136
TP157
TP102
TP150
TP118
TP95
R643
220K
162
TP137
TP99
TP72
TP149
TP114
TP90
TP84
P
163
TP141
TP156
TP41
TP70
TP85
TP146
TP101
TP117
TP92
TP69
TP148
TP134
TP107
TP97
TP151
TP112
TP88
TP167
TP103
TP94
TP119
TP83
TP153
TP108
TP71
TP165
TP89
TP158
TP161
TP82
TP104
TP145
TP96
TP142
TP111
TP86
TP79
TP152
TP116
TP164
TP91
W605
470
R39
10u50
C43
30K
R142
10u50
C135 330 R157
0.1
C138
0.1
C139
330
R158
10u50
C136
15K
R150 10u50 C126
3K
R159
3K
R160
10u50
C125
22K
R161
10u50
C144
10u50
C145
15K
R149 22P
C140
22K
R163
10u50
C142
10u50
C143
2.2
R46
220K
R647
2.2
R52
3.3K
R618
2.2
R51
10u50
C57
10u50
C58
4.7K
R651
3.3K
R624
4.7K
R648
0.01
C614
2.7K
R646
3.3K
R652
3.3K
R653
4.7K
R656
10u50
C24
2.2u50
C13
330K
R20
47u25
C15
1K
R27
100K
R22
0.1
C14
10K
R19
1000P
C17
10u50
C16
1
R49
47
R11
47
R54
47
R56
4.7K
R9
4.7K
R10
47
R57
47
R55
47
R12
3300u16
C11
0.01
C60747K
R664
47
R668 47
R667
47K
R661
5.6K
R659
0.1
C616
22K
R625
47K
R620
47K
R630
12K
R617
100u10
C606
100u10
C608
2.2K
R406
10K
R622
10u50
C604
10u50
C605
680
R626
33K
R605
33K
R609
10K
R604
10K
R608
1K
R603
33u35
C601
10u50
C602
1.5K
R613
10u50
C603
30K
R610
0.047
C20
0.047
C19
14 13 12 11 10 9 8
OP+INB
OP-INB
OPOUTB
EVOUTB
REFIN
VREF
GND
1
2
3
4
5
6
7
OP+INA OP-INA OPOUTA EVOUTA VCNTA VCNTB V+
14 13
12 11
10 9
87
65
43
21
G-GND
BB-R
G-GND
BB-L
+15V
-15V
ISO-R
VR-GND
GND
F-GND
ISO-L
D-GND
LOGO-LED
FAN+B
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+
12
W602
12
10uH
L1
10uH
L2
10u50
C1
TH605
TH601
TH602
83
4
12
5
76
6
57
82
4
31
83
4
21
5
67
470
R38
0.047
C133
0.047
C134
47K
R165
22K
R162
47K
R166
4.7K
R134
4.7K
R135
30K
R143
220
R168
220
R167
2.2
R45
R164 22K
C141 22P
10P
C54
10
R50
1.8K
R649
47
R13
47
R14
1.5K
R15
1.5K
R16
10K
R23
20K
R24
6.8K
R25
390
R34
10K
R35
10K
R21
27K
R17
1K
R53
100K
R650
8.2K
R18
100K
R26
10K
R629
47K
R621
6.2K
R633 2.2K
R634 12K
R631
12K
R632
10K
R635
0.01
C609
0.01
C610
4.7
R619
6.8K
R665
6.8K
R666
47K
R660
10K
R662
51K
R658
10K
R663
10K
R606
4.7K
R607
1K
R627
3.6K
R612
3.6K
R611
3.3K
R614
12
W604
W603
12
2
1
W601
12345678
1/2W
10
R29
1/2W
10
R28
3.9K
R616
3.9K
R615
10K
R657
-3dB
-1.5dB
10
9
9
10
+15V +15V
-15V -15V
+47.4V
B14.4V
B14.4V
FAN+B
FAN+B
-47.4V
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
++
IC9
IC5
KAC-X20 (1/2)
A
0V
5.0V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
5.0V
0-3.0V
-15.2V
-15.2V
15.2V
15.2V
-15.0V 3.0V
1.5V
15.2V
1.9V
3.0V
-15.0V
5.0V
0V
0.5V
0V
14.2V
5.0V
5.0V
0V
14.2V
0V
3.3V
12V
0V
2.4V
0V
4.5V
5.0V
14.4V
0V
0V
-15.2V
X09-8570-10 (2/2)
CAUTION : For continued
safety, replace safety critical
components only with
manufacturer's recommended
parts (refer to parts list).
Indicates safety critical com-
ponents. To reduce the risk of
electricshock,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 mea-
suredwith ahighimpedance
voltmeter. Values may vary
slightly due to variations
between individual instru-
ments or/and units.

KAC-X20
9
WH1
D609
S1
CN8
IC3(2/2)
IC3(1/2)
IC1
IC2
IC2
(1/2)
IC1
S6
ST/MONO
D614
CN3
CN1
1/2
CN1
A/2-
GND LINE
SIGNAL LINE
B LINE
B LINE
HPF/OFF/LPF
D609 : B30-1743-05
IC5(1/2)
IC5(2/2)
IC4(1/2)
IC4(2/2)
(1/2)
(2/2)
X09-
(2/2)
S7
FILTER
OFF/15/25Hz
I.S.F.
IC1-5 : BA4560RF
D614 : LM1MA142WK-G
HPF
LPF 40-200Hz -24dB/oct
HPF,40-200Hz -12dB/oct
FAN
3
1
2
C613
0.01
TP210TP211
TP121
TP157
TP127
TP117
TP119
TP158
TP160
TP162
TP114
TP3
TP156
TP153
TP163
TP161
TP118
TP116
TP115
TP105
TP155
TP126
14 13
12 11
10
9
8
7
65
43
21
LOGO-LED
FAN+B
-15V
+15V
BB-R
GND
BB-L
D-GND
ISO-R
F-GND
ISO-L
G-GND
3
1
4
6
5
2
7
8
9
50K
VR152
6
4
573
28
1
7
6
58
1
3
2
7
6
5
6
5
4
72
34
1
3
2
4
1
R123 47K
0.1
C103
20K
R105
0.1
C105 10u50
C107
10u50
C108
47K
R110
20K
R152
20K
R153
0.15
C153
10K
R156 180K
R157
10K
R155
0.033
C154
7.5K
R158
0.15
C156
9.1K
R160 100K
R161
10u50
C158
10K
R121
62K
R128
L
R
R124 47K
R111 47K
13K
R107
TP113
R
L
7.5K
R162
47K
R148
47K
R163
TP13
3
2
1R603
10
10u50
C604
C603
47u25
C602
0.01
1
2
1.2K
R601
+15V
-15V
+15V
-15V
-15V
C157 0.033
S6
TP7
VR4
VR-GND
G-GND
C4
7P
R6
10
R10
10
TP5
TP106 7P
C5
100
R15
100
R16 C6
7P
TP14
TP154
3
1
8
6
4
7
9
2
5
VR101 50K
430
R146
R145
430
88
10u35
+
C109
10u35
+
C7
C111
10u35
+
56K
R630
TP107
TP1
10u35
+
C112
10u35
+
C8
+15V
R122 620
TP2
C110
10u35
1u50
+
C114 1u50
+
C116
+
C115
+
C113 1u501u50
27K
R135
+
C119
+
C117
1u50 1u50
R137 2K
3.9K
R133
5
67+
C123
1u50
+
C121
1u50
27K
R136
2
381
4
1u50
+
C118 C120
1u50
R138 2K
+
C122
+
C124
1u50
1u50
R141
100K
R142
R144 100K
8.2K
TP167
R17 4.7K
R132 10K
R140 18K
R129 47K
R134 3.9K
10K
R131
18K
R139
R143 8.2K
13K
R108
+15V
-15V-15V
+15V
C54
10u50
+
C52
10u50
+
10
R2
10
R1
100
R11
100
R12
10
R4
10
R3
10u50
+
C53
10u50
+
C51
4.7K
R18
10K
R126
10K
R631
R106 20K
0.1
C106
0.1
C104
TP159
5-0.2V
PHASE INVERTER
R9
10 7P
C3R5
10
7P
C2R14
10
R13
10
+
47K
R130
10
R7 C1
7P
R8
10
R147 47K
INPUT SENS
+15V
+
+
+
+
+
+
(X09- ) (B/2)
PREAMPLIFIER UNIT (X08-4320-10)
A
KAC-X20 (2/2)
-15.0V 15.0V
15.0V
15.0V
-15.0V
-15.0V
-15.0V
KLMNO
1
2
3 4 5 6 7
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-currentorresistance measurements shall be carried out (exposed parts are acceptably in- sulated from the supply circuit) be- fore 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 in- struments or/and units.
X08-4320-10 (1/1)
B
C
E
D
G
S
2SA992-A 2SC1845-A
2SA1576A
2SB1375-F 2SD2012-F
2SC4081
DTA114EUA DTC114EUA 2SK246

KAC-X20
10
3
2
1
BA
(X09-857)
(A/2)
(X09-)
(B/2)
A
B
C
D
E
F
G
H
K
L
M
N
P
Q
R
M6,AU
M4,AU
φ3x12
M4x12
φ2x8
φ3x10
φ2x5
φ2x6
φ3x6
φ3x8
φ3x16
φ3x8
φ3x14
φ3x10
φ3x6
: N07-0003-08
: N09-4214-08
: N09-6216-05
: N09-6432-05
: N80-2008-43
: N80-3010-43
: N82-2005-43
: N82-2006-48
: N89-3006-43
: N89-3008-48
: N89-3016-48
: N09-6135-05
: N09-6217-05
: N09-6447-05
: N83-3006-43
Bx5
Ax2
(X08-432)
J3
J1
J4
Px3
Gx6
Dx2
K
729
L
716 13
8
12
10
914
11
9
1
9
27 26
K
K
716x2
Lx3
Cx4
Px9
Px6
Lx2
Lx2
Lx2
L
C
733
729
L
703
734
736
C
Hx2
Hx2
K
723
723
K
6
8
18
715
Qx2
Nx2
Cx2
Nx3
F1x2
Fx2
Lx2
Nx2
N
L
735
719
7
FC1
PA1
F
F
R
EE
L
731
728
L
L
L
MM
L
N
716
Bundled to the
transistor.
Parts with the exploded numbers larger than 700 are not supplied.
EXPLODEDVIEW