Service manual
- 27 -- 26 -
PRODUCT SAFETY NOTICE
Each precaution in this manual should be followed during servicing. Components identified with the IEC symbol
!
!!
and mark in the parts list and the schematic
diagram designated components in which safety and performance can be of special significance. When replacing a component identified by
!
!!
and , use only
the replacement parts designated, or parts with the same ratings of resistance, wattage or voltage that are designated in the parts list in this manual. Leakage-
current or resistance measurements must be made to determine that exposed parts are acceptably insulated from the supply circuit before returning the product
to the customer.
TU_GND
TU_RCH
TU_LCH
CD_RCH
A_GND
CD_LCH
CD_GND
CD_+B
AUX_MUTE
BEAT
BASS
QSOUND
ST/BY
GND
TAPE_PLAY
AC_SENS
5.6V
VOL_CLK
A_MUTE
VOL_DATA
SYNC_REC
VOL_STB
R4911
Q4902
C4920
R4910
C4919
R4912
C4921
C4918
IC412
R4718
C4713
C4911
R4818
C4813
C4815
C4714
C4715
C4814
C4716
C4913
R4781
C4912
C4816
R4881
C4712C4812
C4905
C4909
R4905
CN406
L4902
R4941
CN405
Q4951
D4951
R4951
C4952
C4951
R4952
R4752
R4852
C4953
PR495
C4916
Q4751
Q4851
R4756
R4856
C4983C4982
D4982 D4983
D4981D4980
C4981C4980
R4961
D4961
D4963
D4962
R4962
C4751
C4851
C4961
R4717R4817
R4816
R4716
Q4904
C4906
CN215
CN216
CN421
R4938
C4811
C4711
IC411
R4736
C4735
C4736
R4737
R4738
R4739
C4742
C4734
C4738R4740
R4741
R4742
R4745
C4739
C4740
C4741
R4746
R4747
C4743
C4843
R4843
R4847
R4846
C4841
C4840
C4839
R4845
R4842
R4841
R4840C4838
C4834
C4842
R4839
R4838
R4837
C4836
C4835
R4836
C4726
C4826
C4731
C4732
C4831
C4832
C4837
R4949
R4833
R4834
R4832
R4831
R4948
R4734
R4733
R4732
R4731
R4735
R4730
R4830
C4833
R4835
C4730
C4733
Q4106
R4106
R4704
R4703
R4803
R4804
C4704
C4804
C4703
C4803
R4901
C4901
C4802
C4702
C4807
C4707
C4701
C4801
R4710
R4810
C4805
C4705
R4805
R4705
C4806
C4706
R4708
C4708
C4709
R4709
C4808
R4808
R4809
C4809
R4848
R4849
R4850
R4751
R4748
R4749
R4750
R4851
CN401
CN402
S4950
IC410
R4853
R4753
R4761
R4760
R4861
R4860
Q4103
Q4903
D4102
Q4104
R4107
CN441
PR496
R4770
R4870
R4971
C4844
Q4830
Q4730
C4744
D4953
C4962C4963
R4991
CN490
C4984
C4723
C4823
Q4840
Q4740
R4857
R4859
R4858
R4757
R4759
R4758
R4914
L4781
L4881
C4110
R4110
R4108
Q4108
Q4109
R4109
C4852 C4752
C4853 C4753
C4750
C4850
L4591
CN450
CN451
CN452
Q4992
Q4994
R4953
C4915
IC446
D4993
C4994
C4997
R4104
R4105
CN491
C4993
R4743
Q4995
R4955
R4954
12
2SC3330
0.01
10K
0.01
330
10/25
1000P
TA8229K
TA8229K
390
47/10
330/10
390
47/10
100/16
0.15
100/16
0.15
1000/16
3300/25
150
220/25
1000/16
150
3300P
3300P
10/25
220/10
100
27
KTD2058
MTZJ9.1B
470
0.022
47/25
470
2.2
2.2
470/16
1250mA
180P
2SD1012
2SD1012
4.7K
4.7K
0.01
0.01
RL153 RL153
RL153RL153
0.010.01
10K
1SS133
1SS133
1SS133
1K
1/50
1/50
1;50
15K
15K
1K
1K
2SC3330
1000P
10K
10/25
10/25
LC75392
47K
150P
6800P
18K
1K
47K
2200P
0.01
0.01522K
27K
10K
15K
470P
3300P
47P
82K
68K
10P
10P
100K
68K
82K
47P
3300P
470P
15K
10K
27K
22K0.015
0.01
2200P
47K
1K
18K
6800P
150P
47K
1/50
1/50
1/50
1/50
1/50
1/50
470/6.3
2.2K
3.9K
3.9K
5.6K
47K
2.2K
3.9K
3.9K
5.6K
47K
3.9K
12K
12K
1/50
3.9K
100/10
1/50
KRC102M
10K
3.9K
56
56
3.9K
47/10
47/10
0.022
0.022
510K
47/10
1000P
1000P
2200P
2200P
10/25
10/25
3.9K
3.9K
1000P
1000P
18K
18K
270P
270P
18K
2200P
560P
820
2200P
18K
820
560P
22K
47K
22K
22K
22K
47K
22K
22K
000
BA3314
180K
180K
1K
1.5K
1K
1.5K
KRA102M
TKTC3199
1SS133
KRC102M
47K
1500mA
47K
47K
100
5600P
KTA1267
KTA1267
5600P
1SS133
10/1610/16
10K
0.01
1/50
1/50
KRC102M
KRC102M
8.2K
1.5K
5.6K
8.2K
1.5K
5.6K
2.7K
000
000
100/10
1K
3.3K
KRC107M
KRC107M
3.3K
0.15 0.15
0.22 0.22
0.01
0.01
KTA1271
KRC107M
4.7K
1/50
NJM78L05A
1SS133
47/10
0.01
100K
10K
10/25
100K
KTA1271
47K
4.7K
15 14 13 12 11 10 9
12345678
89101112 13 14
123456789101112131415
302928272625242322212019181716
1234567
1
2
3
4
5
6
7
8
123
1
2
3
4
5
6
7
8
9
10
11
12
13
14
S4950-1~2 R/P SW
S4904 MECHA MOTOR SW
SP471
SP481
LEFT
RIGHT
HEAD PHONE
(1/2)
(2/2)
R
P
ALCNC OUT1NCOUT2NF2 NF3
NF1IN1GNDGNDVCCIN2FILTER
MAGNETIC
EHEAD
WOOFER
WOOFER
+
P
R
R/P
HEAD
-
(FUSE)
L-CH
R-CH
MOTOR
S4904
(FUSE)
(FUSE)
S4950-2
TO CD
(AMP BLOCK)
(MYLAR)
FU401
T2.5A L250V
TO FRONT BLOCK
LVR
OUT
LVR
IN
LT
OUT
LT
COM
LT4
CLASSIC
LT3
POP
LT2
ROCK
LT1
FLAT
L4
IN
L3
IN
L2
IN
L1
IN
VDDCLDI
CE VSS VREF
R1
IN
R2
IN
R3
IN
R4
IN
RT
COM
RT
OUT
RVR
IN
RT1
FLAT
RT2
ROCK
RT4
CLASSIC
RT3
POP
RVR
OUT
P
P
P
P
P
PR
R
R
R
R
R
S4950-1
S4950-5
S4950-6
S4950-7
S4950-8
S4950-4
S4950-3
50HZ
AC 230V
T4981
0
4.3
0
0.6
0
0.1
00 0
5.9
0.6 0.60 6.3
11.3 5.9 12.0 11.3 0 11.6
PLAY
REC
9.0
12.0
9.6
SCHEMATIC DIAGRAM (AMPLIFIER)
This is a basic schematic diagram.