+12V
+12V
+20V
+20V
+20V
MUTE_LR
-40V
-40V
-40V
-40V
-40V
-40V
-40V
-40V
-40V
-40V
-40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
+40V
RS_EQAUD
RS+SPKR
R_EQAUD
C_EQAUD
L_EQAUD
B_EQAUD
LS_EQAUD
-20V
-20V
-20V
B+SPKR_OUT
B+SPKR
CMP_OUT
CMP_OUT
CMP_OUT
CMP_OUT
CMP_OUT
CMP_BIAS
CMP_BIAS
CMP_BIAS
CMP_BIAS
CMP_BIAS
CMP_BIAS
LS+SPKR
-12V
-12V
-12V
C+SPKR
L+SPKR
STBY
STBY
STBY
STBY
STBY
R+SPKR
7294_MUTE_C
7294_MUTE_LSRS
7294_MUTE_LSRS
7294_MUTE_LR
7294_MUTE_LR
R
FRAMINGHAM, MA 01701-9168
8
7
6
5
4
3
1
2
3
4
5
6
7
8
A
B
C
D
D
C
B
A
1
2.0K
146818
2.0K
1
100K
100K
100K
100K
100K
100K
200
10.0M
TIP146T
SGSD200
TIP146T
SGSD200
2.0K
10/25
10/25
10/25
10/25
10/25
1N5402
1N5402
1N5402
1N5402
1N5402
1N5402
2SA1179
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
1.0
1.0
1.0
TIP141T
SGSD100
TIP141T
SGSD100
3904
3904
3904
3904
3904
3904
3904
3904
5.6V
5.6V
5.6V
5.6V
LM339
(3=+12V,12=-12V)
LM339
(3=+12V,12=-12V)
LM339
(3=+12V,12=-12V)
LM339
(3=+12V,12=-12V)
LM393
(4=-12V,8=+12V)
LM393
(4=-12V,8=+12V)
NC2
MUTE
STBY
IN+MUTE
IN+
IN-
-VS
-PWVS
STBYGND
NC3
+VS
+PWVS
OUT
BTSTRAP
NC1
NC2
MUTE
STBY
IN+MUTE
IN+
IN-
-VS
-PWVS
STBYGND
NC3
+VS
+PWVS
OUT
BTSTRAP
NC1
NC2
MUTE
STBY
IN+MUTE
IN+
IN-
-VS
-PWVS
STBYGND
NC3
+VS
+PWVS
OUT
BTSTRAP
NC1
NC2
MUTE
STBY
IN+MUTE
IN+
IN-
-VS
-PWVS
STBYGND
NC3
+VS
+PWVS
OUT
BTSTRAP
NC1
NC2
MUTE
STBY
IN+MUTE
IN+
IN-
-VS
-PWVS
STBYGND
NC3
+VS
+PWVS
OUT
BTSTRAP
NC1
49.9K
1.5K
1.5K
1.5K
1.5K
1.0K
2.49K
1.0K
2.49K
49.9K
49.9K
49.9K
49.9K
301
4559
(8=+12V,4=-12V)
(8=+12V,4=-12V)
4559
0.1
10/16
1.0/50
0.47/50
1.0/50
10/16
1.0/50
10/16
0.47/50
1.0/50
0.47/50
10/16
10/16
1.0/50
10/16
1.0/50
0.47/50
0.47/50
100/16
.001
.001
.001
.001
.001
.001
.001
.001
.001
.001
.001
.001
.01
.01
.01
.01
3.65K
3.65K
330K
330K
330K
330K
3.65K
3.65K
330K
3.65K
.001
270p
.001
.001
.001
.0033
.0033
.01
3906
3906
3906
3906
3906
3906
3906
140349
332
49.9K
332
332
332
332
49.9K
3.65K
16.5K
2.49K
100K
2.49K
49.9K
16.5K
2.49K
2.49K
49.9K
16.5K
2.49K
4.22k
16.5K
100K
200K
3.65K
100K
3.65K
49.9K
49.9K
16.5K
2.49K
2.49K
100K
3.65K
2.49K
33.2K
100K
2.49K
2.49K
16.5K
100K
100K
220
5.1
75
1.0K
1.0K
1.0K
1.0K
1.0K
100K
1.0K
1.0K
1.0K
1.0K
1.0K
1.0K
1.0K
10K
100K
1.0K
10K
10K
1.0K
10K
1.0K
10K
1.0M
75
0.062
100K
1.0M
BAV99L
BAV99L
BAV99L
BAV99L
BAV99L
BAV99L
TP870
R826
Q726
R825
R788
R725
R772
R779
R728
R743
R733
R786
R783
Q700
Q715
Q705
Q718
R827
C716
C705
C712
C721
C711
D710
D704
D711
D707
D706
D712
Q725
C733
C744
C763
C764
C736
C746
C760
C726
C771
C762
C765
Q706
Q720
Q709
Q719
Q710
Q712
Q713
Q722
Q702
Q703
Q708
Q714
D720
D721
D722
Q724
D709
D703
D708
D701
14
8
9
U702
2
4
5
U702
1
6
7
U702
13
10
11
U702
1
2
3
U706
7
6
5
U706
12
7
13
14
6
5
15
8
1
11
10
9
4
3
2
U703
TDA7294
12
7
13
14
6
5
15
8
1
11
10
9
4
3
2
U700
TDA7294
12
7
13
14
6
5
15
8
1
11
10
9
4
3
2
U701
TDA7294
12
7
13
14
6
5
15
8
1
11
10
9
4
3
2
U704
TDA7294
12
7
13
14
6
5
15
8
1
11
10
9
4
3
2
U705
TDA7294
R756
R705
R703
R706
R702
R741
R775
R732
R797
R721
R752
R777
R736
R794
1
2
3
U707
7
6
5
U707
C761
C708
C717
C709
C702
C715
C713
C718
C707
C720
C714
C710
C706
C704
C722
C727
C723
C719
TP800
TP801
TP802
TP803
TP804
TP805
TP806
TP807
TP808
TP809
TP810
TP811
TP812
TP813
TP718
TP814
TP719
TP716
TP714
TP710
TP815
TP816
TP817
TP818
TP717
TP709
TP711
TP715
TP713
TP712
TP819
TP820
TP821
TP822
TP823
TP824
TP825
TP826
TP827
TP828
TP829
TP830
TP831
TP832
TP833
TP834
TP835
TP836
TP837
TP838
TP840
TP846
TP852
TP858
TP841
TP847
TP853
TP859
TP842
TP848
TP854
TP860
TP843
TP849
TP855
TP861
TP844
TP850
TP856
TP862
TP845
TP851
TP857
TP863
TP865
TP864
TP867
TP866
TP868
TP703
TP706
TP705
TP704
TP701
C725
C734
C754
C737
C745
C747
C756
C738
C743
C748
C735
C755
C757
C751
C741
C752
C742
TP869
R807
R802
R820
R819
R818
R817
R805
R804
R816
R806
C740
C759
C749
C739
C750
C766
C753
D723
C758
Q707
Q717
Q704
Q711
Q721
Q701
Q723
Q716
R904
R781
R905
R900
R901
R903
R720
R731
R723
R719
R742
R729
R749
R750
R748
R753
R738
R737
R739
R793
R790
R768
R789
R760
R767
R734
R787
R758
R757
R759
R755
R744
R762
R722
R784
R812
R776
R782
R780
R821
R727
R711
R710
R712
R735
R726
R766
R795
R792
R778
R773
R769
R763
R761
R774
R771
R745
R785
R796
R747
R746
R770
R730
R740
R764
R765
R791
R707
R822
R824
R823
TP871
D718
D705
D702
D716
D715
D719
1
D
S
-
+
1/4
-
+
1/4
-
+
1/4
-
+
1/4
-
+
1/2
-
+
1/2
-
+
1/2
-
+
1/2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TA-1 Home Theater Amplifier
Amplifier PCB
PCB P/N: 256421 Rev. 02
Sheet 1 of 2
Service Manual P/N: 263494 Rev. 00
2
