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SCHEMATIC DIAGRAM (AMPLIFIER)
S4950-3
P
R
18K
R4805
P
S4950-8
1000P
1000P
C4705
R
C4805
P
18K
R
R4705
S4950-7
8
9
10
11
NC
NF2
OUT2
IC410
BA3314
CN406
L-CH
FILTER
IN2
VCC
GND
R/P
7
6
5
HEAD
R-CH
P
R
MAGNETIC
E HEAD
P
S4950-1
R
S4950
P
S4950-2
R
CN405
(MYLAR)
Q4904
2SC3330
L4902
CN490
TU_GND
1
TU_RCH
2
TU_LCH
3
CD_LCH
4
A_GND
5
CD_RCH
6
CD_GND
7
CD+B
8
TAPE_PLAY
14
V_CHECK
13
SYNC_REC
12
+5.6V
11
VOL_DATA
10
NC
9
VOL_CLK
8
POWER_RY
7
GND
6
BEAT
5
ST_BY
4
SURROUND
3
A_MUTE
2
VOL_CE
1
CN491
Q4106
KRC102M
TO FRONT
Each precaution in this manual should be followed during servicing. Components identified with the IEC symbol
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
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.
R4820
4.7K
R4821
27K
R4822
56K
P
R
S4950-4
R4825
22K
15
12
13
14
NC
NC
OUT1
NF3
ALC
GND
IN1
NF1
NC
4
3
2
1
16
1000P
C4708
C4702
2200P
R4761
1.2K
R4720
P
R
C4808
R4708
4.7K
2200P
18K
R4721
27K
R4861
R4725
1.2K
22K
R4722
56K
18K
R4808
C4701
10/25
C4915
1/50
R4912
330
0
0
C4919
0.6
4.3
0.01
Q4902
0
R4910
2SC3330
0.1
10K
PLAY
REC
Q4104
KRC102M
PRODUCT SAFETY NOTICE
! ! !
, use only the replacement parts designated, or parts with the same ratings of resistance,
- 24 -
R4922
1K
C4833
R4923
1/50
1K
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TA
CD
TU
AU
R
R
R
R
R
R
TEST
VSS
CE
DI
R
R
R
R
SELO
VRIN
TRE
BASS1
BASS2
OUT
IC411
LC75348
L
L
L
L
L
L
L
L
L
L
TA
CD
TU
AU
SELO
VRIN
TRE
BASS1
BASS2
OUT
TIM
Vref
VDD
CL
17
18
19
20
21
22
23
24
25
26
27
28
29
30
R4959
R4963
470K
100
1/50
C4733
R4924
1K
R4110
1K
Q4321
Q4320
KTA1266
2SC3330
10K
R4325
and
mark in the
R4757
8.2K
KRC102M
Q4740
Q4751
2SD1012
R4756
4.7K
PR496
20K
1500mA
4
12
C4726
R4716
C4751
1/50
1K
1/50
30
B.S.1
5
1
CH-1
6
2
OUT1
C4826
R4816
C4851
1/50
1/50
1K
BIAS CIRCUIT
7
3
THERAMAL SHUT DOWN
PROTECTION CIRCUIT
Q4851
2SD1012
OUT2
8
10
CH-2
R4856
4.7K
9
11
30
20K
IC412
KIA6282K
R4857
8.2K
Q4840
KRC102M
(FUSE)
IC446
NJM78L05A
1
2
3
R4956
4.7K
Q4996
Q4997
2SC3330
2SC3330
R4955
47K
14.0
9.0
PR495
1500mA
Q4951
9.6
KTD2058
Q4992
KTA1271
R4953
4.7K
Q4994
KRC107M
T4981
FU401
T2.5A L 250V
CN411
+14V
FUSE(TH)
POWER SUPPLY
R6512
R6513
R6514
680
820
1K
CN455
CN452
BL
L4591
AC230V
BW
50Hz
CN603
CN451
KEY2
D_GND
TO_TUNER
This is a basic schematic diagram.
- 25 -
C4913
4700/25
(FUSE)
CN421
R4781
L4781
150
22U
C4716
1000/16
C4912
R4881
L4881
150
22U
47/25
C4816
HEAD PHONE
1000/16
LEFT
WOOFER
SP471
CN402
CN401
SP481
RIGHT
WOOFER
Q4995
KTA1271
(AMP BLOCK)
S4904: MECHA MOTOR SW
S4950-1~2 R/P SW
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