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Model
XM-GTR4A
Pages
24
Size
1.52 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
xm-gtr4a.pdf
Date
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XM-GTR4A
XM-GTR4A
9
9
SECTION  3
DIAGRAMS
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  
BOARDS  AND  SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed 
in each block.)
For Printed Wiring Boards.
Note:
•  X : Parts extracted from the component side.
• 
 : Pattern from the side which enables seeing.
For Schematic Diagrams.
Note:
•  All capacitors are in 
μF unless otherwise noted. (p: pF) 50 
WV or less are not indicated except for electrolytics and 
tantalums.
•  All resistors are in 
Ω and 1/4 W or less unless otherwise 
specifi ed.
•  A : B+ Line.
•  B : B– Line.
•  H : Adjustment for repair.
•  Power voltage is dc 14.4 V and fed with regulated dc 
power supply from +12 V and REM terminals.
•  Voltages are dc with respect to ground under no-signal  
conditions.
  no mark : POWER ON
       
*
  : Impossible to measure
•  Voltages are taken with VOM (Input impedance 10 M
Ω).
  Voltage variations may be noted due to normal production 
tolerances.
•  Waveforms are taken with a oscilloscope.
  Voltage variations may be noted due to normal production 
tolerances.
•  Circled numbers refer to waveforms.
• Signal path.
  F : 
AUDIO
•  Note for Replacement of the Transistors
The transistors Q110, 111, 210, 211, 310, 311, 316, 317, 410, 411, 
416 and 417 have two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing to each channel. When replacing any one of these transistors, 
check its rank and replace with the appropriate transistor of the 
same rank.
Rank
Q110, 210, 310,
  316, 410, 416
Q111, 211, 311, 
  317, 411, 417
P
2SC5100-P
(Part No. 8-729-024-79)
2SA1908-P
(Part No. 8-872-024-76)
Y
2SC5100-Y
(Part No. 8-729-024-80)
2SA1908-Y
(Part No. 8-872-024-77)
DISCRIMINATION:
• Waveform
Note: The components identifi ed by mark 0 or dotted 
line with mark 0 are critical for safety. 
 
Replace only with part number specifi ed.
A1908: 2SA1908
C5100: 2SC5100
P: RANK P
Y: RANK Y
•  IC Block Diagram
IC901  TL594INSR (MAIN Board (2/3))
OSC
REF 5V
ERROR
ERROR
0.1V
Q1
Q2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7 8
NON
INV
VREF
VCC
C2
E1
E2
OUT
+IN
-IN
COMPEN
CT
RT
C1
GND
TIME
1
  IC901 
5 (CT)
1 V/DIV, 5 
Psec/DIV
1.2 Vp-p
17.5 
Psec
XM-GTR4A
XM-GTR4A
10
10
3-1.  BLOCK  DIAGRAM
3
2
1
PRE AMP
IC801 (1/2)
1
GAIN CONTROL AMP
IC805 (1/2)
HPF
IC803 (1/2)
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q110
DRIVE
AMP
Q104
DIFFERENTIAL
AMP
Q102
POWER
AMP
Q111
DRIVE
AMP
Q105
BIAS
Q106,107
REG
Q115
-30V
REG
Q114
+30V
REG
Q214
+30V
REG
Q215
-30V
REG
Q315
-40V
REG
Q314
+40V
REG
Q414
+40V
REG
Q415
-40V
BIAS
Q206,207
CNJ101 (1/2)
CN901
MUTE
SWITCH
Q101
+12V
GND
9
PRE AMP
IC801 (2/2)
DIFFERENTIAL
AMP
Q203
POWER
AMP
Q210
DRIVE
AMP
Q204
DIFFERENTIAL
AMP
Q202
MUTE
CONTROL
Q802
POWER
AMP
Q211
DRIVE
AMP
Q205
-3
-2
-4
FL
FR
RL
RR
-1
L
FRONT
INPUT
D906
D907
REAR
R
CN904 (1/2)
L
R
MUTE
SWITCH
Q201
1
2
14
12
REF.
REG
CN904 (2/2)
F901
30A
SWITCHING
DRIVER
Q951
SWITCHING
DRIVER
Q950
DRIVER
Q952,953
8
10
11
3
D918
POWER/
PROTECTOR
FRONT
SPEAKER
OUT
DC-DC
CONVERTER
TRANSFORMER
T902
DC-DC CONVERTER
IC901
B+
SWITCH
Q905
OVERLOAD
DET
Q112
OVERLOAD
DET
Q212
CN903
L
(L+R)
R
REAR
SPEAKER
OUT
6
5
CNJ101 (2/2)
L
(L+R)
R
(L+R)
REM
+15V REG
Q807
–15V REG
Q808
PROTECTOR
DETECT
Q901,902
OVERLOAD
PROTECT
(REAR)
Q805,806
OVERLOAD
PROTECT
(FRONT)
Q803,804
POWER
ON/OFF
Q906
+30V
+15V
–30V
–15V
D851
RECT
D850
RECT
(FRONT)
(REAR)
HIGH 
LEVEL
INPUT
F902
30A
PRE AMP
IC802 (1/2)
1
LPF
IC806 (1/2)
GAIN CONTROL AMP
IC807 (1/2)
DIFFERENTIAL
AMP
Q303
POWER
AMP
Q310,316
DRIVE
AMP
Q304
DIFFERENTIAL
AMP
Q302
POWER
AMP
Q311,317
DRIVE
AMP
Q305
MUTE
SWITCH
Q301
PRE AMP
IC802 (2/2)
DIFFERENTIAL
AMP
Q403
POWER
AMP
Q410,416
DRIVE
AMP
Q404
DIFFERENTIAL
AMP
Q402
POWER
AMP
Q411,417
DRIVE
AMP
Q108
DRIVE
AMP
Q109
DRIVE
AMP
Q208
DRIVE
AMP
Q209
DRIVE
AMP
Q308
DRIVE
AMP
Q309
DRIVE
AMP
Q408
DRIVE
AMP
Q409
DRIVE
AMP
Q405
MUTE
SWITCH
Q401
OVERLOAD
DET
Q412,413
5
OVERLOAD
DET
Q312,313
2
3
6
TEMP.DET
TH901-905
DC DET
Q813-815
TEMP.DET
Q900
LED DRIVER
Q903
R
(PROTECTOR)
G
(POWER)
THERMAL DET
Q914,915
SWITCHING
DRIVER
Q910,911
SWITCHING
DRIVER
Q912,913
DRIVER
Q908,909
DC-DC
CONVERTER
TRANSFORMER
T901
+39V
-39V
+40V
–40V
D804
RECT
D861
RECT
D860
RECT
D803
RECT
VCC
REF
D905
D903
D901,902
D921,922
(ILLUMINATOR-L)
D919,920
(ILLUMINATOR-R)
OVER
VOLTAGE
DETECT
Q907
2
HPF
3
2
7
7
GAIN CONTROL AMP
IC805 (2/2)
HPF
IC803 (2/2)
6
HPF
LPF
5
6
2
7
GAIN CONTROL AMP
IC807 (2/2)
3
1
MUTE
CONTROL
Q809
MUTE
CONTROL
Q810
MUTE
CONTROL
Q811
MUTE
CONTROL
Q812
15
16
1
7
SUBSONIC FILTER
IC804 (1/2)
2
BIAS
Q306,307
BIAS
Q406,407
RV802-1
RV802-2
RV801-2
RV803-1
RV801-1
RV805-1
RV804-1
RV804
S803-1
S802-1
S801-1
S801-2
RV802
LEVEL
HPF
OFF
LEVEL
S801
(HPF)
RV801
HIGH PASS
FILTER
LPF
OFF
S803
(LPF)
OFF
ON
S802
SUBSONIC
FILTER
(15Hz)
RV803
LOW PASS
FILTER
LOW BOOST
(40Hz)
‡ SLJQDO SDWK
            : AUDIO
SENSING
POWER ON
2
3
1
3
1
7
LPF
IC806 (2/2)
LPF
6
5
SUBSONIC FILTER
IC804 (2/2)
6
RV803-2
RV805-2
RV804-2
S803-2
S802-2
6
5
5
7
7
FAN MOTOR
ON/OFF
Q700,701
TEMP.DET
Q702,703
FAN901
DC FAN
DC FAN
CONTROL
Q704
RV805
XM-GTR4A
XM-GTR4A
11
11
• 
 : Uses unleaded solder.
3-2.  PRINTED  WIRING  BOARDS
1
A
B
C
D
E
F
G
H
J
I
2
3
4
5
6
7
8
9
10
11
IC807
IC806
IC804
IC805
IC803
IC801
IC901
IC802
1
2
1
2
1
2
1
2
CN906
CN907
R980
R981
R982
CN907
D919,920
(ILLUMINATOR-R)
D921,922
(ILLUMINATOR-L)
CN905
RED
WHT
1
2
CN700
FAN901
DC FAN
RED+
BLK–
RED
WHT
R983
R984
D919
D920
C980
1
2
CN908
R985
RED
WHT
RED
WHT
R986
R987
R988
R989
D921
C981
D922
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
E
B
B
C
C
TP8
1
2
-4
-8
-5
-1
-4
-8
-5
-1
B   C   E
B   C   E    
1
2
B      C      E
B      C      E
B  C  E
B  C  E
B  C  E
E  C  B
B  C  E
E  C  B
B  C  E
E  C  B
E  C  B
B  C  E
ECB
ECB
ECB
ECB
ECB
ECB
E               C                B
E               C                B
E               C                B
E               C                B
E               C                B
E               C               B
E               C               B
E               C               B
E               C               B
ECB
ECB
ECB
BCE
BCE
ECB
E  C  B
G      D      S
G      D      S
G      D      S
G      D      S
G      D      S
G      D      S
B  C  E
B  C  E
G R
B     C     E
B     C     E
B     C     E
B     C     E
BCE
BCE
BCE
BCE
1
8
9
16
BB1
JR169
R401
BB2
R402
R403
R210
R404
JW181
R211
R405
JW182
R212 R112
R406
JW183
JW156
JW69
R213
R407
JR168
R408
R409
JR174
JR150
JR178
R410
R414
JR69
R411
R412
R314
R413
JW190
JW191
R415
1
4
8
5
1
4
8
5
1
4
8
5
1
4
8
5
1
4
8
5
1
4
8
5
1
4
8
5
JW70
R417
JR70
JW194
R418
R800
JW195
R915
R916
R419
JW196
R802
JW128
JW11
JR184
JW163
JW161
JR185
R806
R807
JR188
R420
R416
R808
JR189
R421
R810
R81
1
R812
R813
ECB
ECB
R814
R815
R816
R817
R818
JR199
C201
C202
C205
C206
C207
C208
C209
C401
C402
C210
C21
1
C405
C212
C406
C407
C408
R251
C409
R252
C216
R253
C217
R254
R255
R256
R257
R258
C410
R259
C41
1
C412
C413
R451
C415
R452
C416
R453
C417
C418
R260
R454
C419
R261
R455
R262
R456
C802
R263
R457
R264
R458
R265
R459
C805
R266
R267
R268
C420
C808
R269
C809
R460
ECB
ECB
ECB
ECB
ECB
ECB
R461
R462
R463
R270
R464
C810
R271
R465
C81
1
R171
ECB
ECB
R466
R272
R919
C812
R467
C813
R468
R850
C814
R275
R469
R851
C815
R276
R852
R277
R853
C817
R278
C818
C819
R470
R471
R472
R473
R474
C820
R475
R476
R477
R478
R860
C824
R479
R861
C825
S801
C826
S802
C827
S803
R480
R481
C251
C252
C253
C254
JW170
JW106
C255
JW166
JW167
JW169
JW125
JW168
C257
JW204
C258
JW205
Q101
JW1
17
Q102
JW120
Q103
JW208
Q104
JW209
C451
Q105
C452
Q106
C453
Q107
Q108
B  C  E
Q208
C455
Q109
B  C  E
Q209
C456
C457
D203
C458
D204
JW211
Q301
JW212
Q302
JW213
Q303
JR200
JW214
Q110
Q304
JW215
Q111
Q305
JR202
Q112
Q306
JW217
Q307
JW218
JW44
JW43
JW35
Q114
D400
Q115
Q309
Q308
D403
D404
JW220
C850
Q310
E               C                B
Q31
1
E               C                B
Q316
E               C                B
Q317
JW129
C851
JW135
C852
Q312
B  C  E
ECB
Q313
JW136
C853
JW224
Q314
JW225
Q315
JW226
JW227
JW228
Q700
Q701
JR216
JR14
Q702
Q703
Q704
JR219
JW230
C860
C861
D801
JW232
D802
C863
D803
C864
D804
Q900
D805
Q901
D806
Q902
BCE
ECB
Q815
ECB
JW237
D807
Q903
BCE
JW238
JW239
Q905
Q906
Q907
BCE
BCE
Q908
Q909
JW240
C870
JW241
C871
JW104
C872
JW243
JW244
Q910
JW245
Q91
1
JW246
Q912
JW247
Q913
JW248
JW249
Q915
L901
L902
L903
JW10
JW107
JW108
JW12
JW13
JW250
JW14
JW251
JW15
JW252
JW16
JW253
JW17
JW254
JW18
JW255
JW19
JW256
JW49
JW45
JW46
JW47
JW259
JW20
JW21
JW22
JW260
JW24
JW261
JW25
JW262
JW26
JW263
JW27
JW264
JW28
JW265
JW29
R101
JW266
R102
JW267
R103
R104
R105
R106
R107
JW30
R108
JW31
R109
JW32
JW33
JW34
PL1
R301
PL2
JW36
R302
JW37
R303
R110
R304
JW39
R111
R305
R306
R113
R307
R308
R309
JW40
JW41
JW71
JW42
D850
R310
D851
R311
R312
R313
Q950
Q951
R315
Q952
R316
Q953
R317
-1
-1
-1
-3
-2
-4
-1
-3
-2
-4
-2
-1
-1
-2
-2
-2
-1
-2
R700
R319
R701
R702
R703
JW50
R704
JW51
R705
JW52
R706
JW53
R707
JW54
D860
R320
R708
JW55
D861
R321
JW56
D862
JW57
D863
JW58
R900
JW59
R901
R902
R903
R904
R905
R906
R907
JW60
R908
JW61
R909
JW62
JW63
JW64
JW65
C101
JR4
JW66
C102
JW67
JW68
R910
CN700
R91
1
C105
R912
C106
C107
C108
C109
R917
R918
C301
JR2
C302
JR3
C1
10
JR5
JW75
C
111
C305
CN901
JR6
JW76
C112
C306
JW77
C307
JW78
R920
C308
CN904
JW79
R151
R921
C309
CN905
R152
R922
C116
R153
R923
C117
R154
R924
R155
R925
R156
R926
R157
R927
JW80
R158
R928
C310
JW81
R159
R929
C31
1
JW82
C312
JW83
C313
JW84
JW85
R351
C315
JW86
R352
C316
JW87
R353
C317
JW88
R160
R354
R930
C318
C700
JW89
R161
R355
R931
C319
C701
R162
R356
R163
R357
R164
R358
R934
TP1
R165
R359
R935
TP2
R166
TP3
R167
R937
R803
Q814
R801
TP4
JW90
R168
R938
ECB
BCE
ECB
C320
TP5
JW91
R169
R939
TP6
JW92
TP7
JW93
JW94
R360
TP9
JW95
R361
C901
JW96
R362
C902
JW97
R363
C903
R170
R364
R940
C904
R365
R941
TH901
R172
R366
R942
C906
TH902
R367
R943
C907
TH903
R368
R944
C908
TH904
TH905
R175
R369
R945
C909
R176
R946
R177
R178
R370
C910
R371
C91
1
R372
C912
R373
C913
R374
R950
C914
R375
R951
RV801
R376
R952
RV802
R377
R953
C917
RV803
R378
R954
C918
RV804
R379
R955
C919
C920
RV805
-2
-1
R956
R957
R380
R936
R381
C151
C921
C152
C153
TP10
R960
C154
TP11
JW101
R961
C155
R962
R914
TP12
JW102
TP13
JW103
C157
TP14
C158
TP15
JW105
TP16
TP17
TP18
TP19
JW109
JW1
C351
JW2
C352
C353
JW4
JW5
C355
JW6
C356
JW7
C357
D103
TP20
JW8
C358
D104
TP21
JW9
Q201
TP22
Q202
TP23
JW1
13
Q203
TP24
JW114
Q204
TP25
JW1
15
Q205
TP26
Q206
TP27
Q207
JR104
JW1
18
D300
JW1
19
JR106
JR107
D303
JR108
D304
Q401
Q402
Q403
JW142
Q210
Q404
JW143
Q211
Q405
JW122
Q212
Q406
JW123
Q407
BCE
ECB
JW1
10
Q214
Q408
JR111
JW
111
JW1
12
JW1
16
Q215
Q409
JR112
JW23
JW3
JW48
JW174
JW100
JW127
JW72
JW73
JW74
JW98
JW99
JR1
16
C950
Q410
Q411
Q412
Q413
JW130
Q414
D700
JW131
Q415
D701
JW126
JW132
Q416
D702
C957
JW133
Q417
D703
JW134
JR1
1
JW124
JW121
Q802
JW137
Q803
JW138
Q804
JW139
Q805
Q806
Q807
Q808
Q809
D901
D902
D903
JW140
D904
JW141
D905
D906
D907
JW144
Q810
JW145
Q811
BCE
BCE
BCE
BCE
BCE
ECB
ECB
ECB
BCE
JW146
Q812
JW147
BCE
Q813
JW148
ECB
Q914
JW149
JW173
JW150
JW151
JW152
JW153
JW154
D918
JW155
JR142
JW157
JW158
JW159
JR38
JW160
T901
JW162
T902
JW164
JW171
R201
JW172
R202
R203
R204
R205
JW176
R206
JR163
JW177
R207
R208
JW179
R209
JR166
JR167
1-877-899-
(12)
12
1-877-900-
(12)
12
1-877-898-
(12)
12
MAIN BOARD
LED1 BOARD
LED2 BOARD
ECB
R318 JR161
FRONT SPEAKER OUT
L
REM
GND
+12V
REAR SPEAKER OUT
CN903
(L+R)
-3
L
-4
R
CN901
HIGH LEVEL INPUT
J101
REAR
FRONT
(L+R)
LEVEL
LOW BOOST
(40Hz)
RV805
RV801
D918
S803
(LPF)
RV804
OFF        LPF
HIGH PASS
FILTER
POWER/
PROTECTOR
G
(POWER)
R
(PROTECTOR)
SENSING POWER ON
FL
FR
RL
RR
INPUT
F901
30A
F902
30A
OFF        ON
LOW PASS
FILTER
RV803
SUBSONIC
FILTER
(15Hz)
S802
-1
L
-2
R
LEVEL
S801
(HPF)
RV802
OFF        HPF
R
L
R
XM-GTR4A
XM-GTR4A
12
12
3-3.  SCHEMATIC  DIAGRAM  – MAIN Section (1/3) –
J
8
H
G
13
5
6
C
D
1
4
7
A
9
15
F
2
11
I
14
3
B
10
E
12
(3/3)
BOARD
MAIN
2
1
MAIN BOARD (2/3)
0
0
0
0
0
0
0
0
0
-14.5
13
0
0
0
0
0
13
14.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
13
-14.5
13
-14.5
13
-14.5
13
-14.5
0
0
0
0
0
-14.5
13
J101
S802
22k
R102
22k
R103
22k
R203
22k
R202
22k
R302
22k
R303
22k
R403
22k
R402
RV801
20kX4
1
2
3
4
5
6
7
8
9
10
11
12
16V
220
C802
2.2k
R802
16V
100
C815
220k
R104
220k
R105
0.1
C116
0.1
C117
0.1
C416
220k
R404
0.1
C316
220k
R304
220k
R405
0.1
C417
220k
R305
0.1
C317
0.1
C216
220k
R204
0.1
C217
220k
R205
0.5%
15k
R106
0.5%
15k
R206
0.5%
15k
R306
0.5%
15k
R406
47p
C105
47p
C205
47p
C405
0.5%
15k
R107
0.5%
15k
R207
0.5%
15k
R307
0.5%
15k
R407
0.22
C108
3.3k
R109
3.3k
R108
0.22
C208
3.3k
R208
3.3k
R209
S801
50V
4.7
C111
50V
4.7
C211
16V
100
C110
16V
100
C210
0.5%
10k
R110
0.5%
10k
R111
0.5%
10k
R211
0.5%
10k
R210
50V
4.7
C311
16V
100
C310
50V
4.7
C411
16V
100
C410
0.5%
10k
R310
0.5%
10k
R311
0.5%
10k
R410
0.5%
10k
R411
RV803
20kX4
1
2
3
4
5
6
7
8
9
10
11
12
3.3k
R312
3.3k
R313
3.3k
R412
3.3k
R413
S803
16V
100
C315
16V
100
C415
0.5%
680
R112
6.8k
R113
6.8k
R213
47p
C320
0.5%
10k
R317
0.5%
10k
R417
47p
C420
6.8k
R319
2.2k
R318
2.2k
R418
6.8k
R419
330
R321
330
R421
750
R320
50V
2.2
C319
50V
2.2
C318
50V
2.2
C419
50V
2.2
C418
750
R420
0.5%
10k
R315
0.5%
10k
R415
10k
R316
10k
R416
NJM4565M(TE2)
IC801
8
POWER
4
GND
+
–
NJM4565M(TE2)
IC801
3
2
1
+
–
NJM4565M(TE2)
IC801
5
6
7
+
–
NJM4565M(TE2)
IC803
5
6
7
+
–
NJM4565M(TE2)
IC803
3
2
1
NJM4565M(TE2)
IC803
8
POWER
4
GND
NJM4565M(TE2)
IC805
8
POWER
4
GND
+
–
NJM4565M(TE2)
IC805
5
6
7
+
–
NJM4565M(TE2)
IC805
3
2
1
+
–
NJM4565M(TE2)
IC807
5
6
7
+
–
NJM4565M(TE2)
IC807
3
2
1
NJM4565M(TE2)
IC807
8
POWER
4
GND
NJM4565M(TE2)
IC806
8
POWER
4
GND
+
–
NJM4565M(TE2)
IC806
5
6
7
+
–
NJM4565M(TE2)
IC806
3
2
1
+
–
NJM4565M(TE2)
IC804
5
6
7
+
–
NJM4565M(TE2)
IC804
3
2
1
NJM4565M(TE2)
IC804
8
POWER
4
GND
NJM4565M(TE2)
IC802
8
POWER
4
GND
+
–
NJM4565M(TE2)
IC802
3
2
1
+
–
NJM4565M(TE2)
IC802
5
6
7
DAN202K-UST-146
D906
DAN202K-UST-146
D907
0.5%
10k
R943
0.5%
10k
R944
0.5%
10k
R946
0.5%
10k
R945
1
2
3
4
5
6
7
8
8P
CN901
100p
C101
100p
C102
100p
C201
100p
C301
100p
C401
100p
C302
100p
C202
100p
C402
1SS355TE-17
D103
1SS355TE-17
D104
1SS355TE-17
D204
1SS355TE-17
D203
1SS355TE-17
D304
1SS355TE-17
D303
1SS355TE-17
D404
1SS355TE-17
D403
1k
R850
1k
R851
1k
R853
1k
R852
0.5%
680
R212
2.2k
R101
2.2k
R201
2.2k
R401
2.2k
R301
RV804
10kX2
1
2
3
4
5
6
7
8
0.22
C109
0.22
C209
0.1
C308
0.1
C309
0.1
C408
0.1
C409
RV802
10kX2
1
2
3
4
5
6
7
8
47p
C106
47p
C107
47p
C207
47p
C206
47p
C307
47p
C306
47p
C406
47p
C407
33p
C112
33p
C212
0.22
C870
0.22
C872
0.22
C871
220k
R308
220k
R309
220k
R409
220k
R408
RV805
10kX2
1
2
3
4
5
6
TP4
0.1
C312
0.1
C313
0.1
C413
0.1
C412
1000p
C808
1000p
C809
1
2
3
4
5
6
7
8
9
10
220k
R314
220k
R414
MAIN BOARD (1/3)
PRE AMP (FRONT)
IC801
IC802
PRE AMP (REAR)
HPF
IC803
GAIN CONTROL AMP
IC805
SUBSONIC FILTER
IC804
LPF
IC806
GAIN CONTROL AMP
IC807
L
4P
R
FRONT (L+R)
HIGH LEVEL INPUT
SENSING POWER ON
R
L
REAR (L+R)
INPUT
(1/3)
(3/3)
(HPF)
-1
-2
OFF
HPF
(1/3)
(3/3)
(2/3)
(1/3)
(3/3)
(2/3)
(2/3)
(3/3)
(1/3)
(2/3)
(3/3)
(1/3)
(2/3)
(1/3)
(3/3)
(2/3)
(2/3)
(3/3)
(1/3)
(40Hz)
LOW BOOST
-1
-2
-1
-2
FILTER
LOW PASS
LEVEL
-1
-2
-3
-4
-1
-2
-1
-2
-3
-4
OFF
LPF
(LPF)
-1
-2
OFF
ON
-1
-2
SUBSONIC
FILTER
(15Hz)
LEVEL
HIGH PASS
FILTER
-1
-2
-3
-4
S802
RV803
S803
S801
RV801
FL +
FR +
RL +
RR +
FL –
FR –
RL –
RR –
47p
C305
(Page 13)
(Page 14)
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