Kenwood XXV-02A - 25th Anniversary Products Amplifier, Service Manual

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XXV-02A
17
AD AC AB AA Z
1
2
3
4
5
6
7
X08-4240-10 (2/2)
0V
8.5V
-15.0V
-15.0V
-15.0V
-15.0V 15.0V
15.0V
15.0V
ED2(SEGMENT)
IC8
ED2(COMMON)
XXV-02A (2/2)
S6
LPF +10DB
18DB/oct
IC4(4/4)
INVERTER
PHASE
S.
IC1(3/4)
IC1(4/4)
PHASE
INVERTER
INPOUT SENS.
HPF/OFF/LPF
IC6(1/2)
IC5
E-VOL
OFF/ON
AMP CONTROL
IC4(3/4)
IC6
IC5(1/2)
D1
S5
HPF,12dB/oct,
F=VRcont
IC4(2/4)
IC4(1/4)
(2/2)
(2/2)
IC1,2,4
B30-1641-05
D1 MA3082-M
IC8 E-TDA7409DTR
IC7 LC75853NE-E
D2
NJM2058M-ZB
:
:
:
:
B38-1150-05 ED2 :
:
SIGNAL LINE
B LINE
B LINE
GND LINE
NJM4565MD-ZB : IC5,6
C18 0.01
8
3
6
8
11
0
TP85
C30
0.1
C31
0.15
R32
R33
15K
15K
TP100
R37
47K
TP44
14
12
C72
0.1
13
R38
7.5K
C73
0.15
TP163
8 1 3
2
VR2
7 6 4
5
TP45
50K(C)
9
TP172
9
R112
10K
10
9
TP43
R217
10K
TP170
3
13
12
8
10u35
C114
TP171
C115
10u35
11
14
C9
TP64
470
TP107
3 2 4 5
8 9 7 6
TP106
5 3 2
TP108
R54
470 R53
1
4
6
TP112
7 9 8
TP168
TP167
R50
10K
C51 0.01 C53 0.01
TP169
4
R52
20K
2
3
1
C50
1000P
R16
1K
TP79
R60
R14
1K
6
1K
5
TP80
7
8
1u50
C10
1u50
TP75 TP72 TP71 TP73 TP74 TP76 TP77
TP81
C17
10u35
TP87
R13
47K
R250
47K
47K
R249
TP111
9
10
R43
8
47K
TP166
10K
TP110
R246
10K R51
R245
100
TP109
7
TP173
6
R55
10K
5 8
TP83
R17
1K
C49
1000P
R15
R61
1K
1K
2
TP70
TP82
3
1
4
C1
0.01
C2
0.01
TP63
TP62
0.01
C11
R228 R229
390 390
TP67
TP69
8
13
OUTRR
OUTLR
4 3 2
SE1L
1
SE2L SE1R
7 6 5
SE3L SE2R SE4R SE3R
17 18 19 20
VDD SCL SD
A
14 15 16
OUTLF
MUTE
OUTRF
R19
10
9
CREF SE4L GND
R18
11 12
SWL
SWR
TP65 TP66
TP68
10K
7
10K
1
2
TP84
4 5
8
TP175
36
C52
10u35
10u35
R12
47K
C16
TP60
TP61
10K
R215
R213 10K
100P
C110
20K
R114
47P
C109
3.3K
R35
2.2K
R36
C32 0.022 C76 0.033
2.2K
R242
10K
R241 220K
R243
TP86
TP99
TP101
TP164
TP165
TP98
TP96
TP162
56K R26
TP88
TP90
R22 8.2K
TP102
TP103
C24
0.22 C20
10u35 C22
0.1
47K
R20
TP91
4 5
6
9.1K R24
TP89
TP95
12
6 4 3 9 7 8
5
0.22
C25
TP94
0.1
47K R21
10u35
C21
C23
9.1K
R25
2
3
TP92
8.2K
R23
TP93
C34 0.01
TP104
R28 47K
10u35
C26
7
50K(C)
VR1
R29
56K
R27
47K
C27
10u35
1
TP105
TP78
0.01
C900
0.01
C901
0.01
C902
0.01
C903
0.01
C904
0.01
C905
10u35
C12
100
R230
100
R231
100
R232
10u35
C14
10u35
C15
10u35
C75
10u35
C36
VR3
10K(A)
C33 0.01
2 3 1
C1
C2 C3
S17
S21
S20 S19 S18
S8
S13 S15 S16 S14
S11
S12
S9
S10
S6 S7 S5 S4 S3 S2
S1
11
15K
R42
12K
R244
17 24 23 20 22 21 19 18 6 16 15 13 14 12 10 11 9 8 7 3 5 4 2 1 17 24 23 20 22 21 19 18 6 16 15 13 14 12 10 11 9 8 7 3 5 4 2 1
COM.1
COM.2
SEG.20 SEG.17 SEG.19 SEG.18
SEG.21
COM.3
SEG.11
SEG.16 SEG.15 SEG.12 SEG.14 SEG.13 SEG.10
SEG.9 SEG.7 SEG.8 SEG.6 SEG.4 SEG.5 SEG.3 SEG.2
SEG.1
SEG.6
COM.2
COM.1
SEG.20
COM.3
SEG.21
SEG.19 SEG.18 SEG.16 SEG.17 SEG.15 SEG.13 SEG.14 SEG.12
SEG.9
SEG.11
SEG.10
SEG.8 SEG.7 SEG.5 SEG.4 SEG.2 SEG.3
SEG.1
+
+
+
+
+
+ +
+
+
+
+ +
+
+
+ +
CAUTION : For continued safety, replace safety critical components only with manufacturer’s
recommended parts (refer to parts list).
Indicates safety critical components. To reduce the risk of electric shock, 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 measured with a high impedance voltmeter. Values may vary slightly due to
variations between individual instruments or/and units.
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