Kenwood RXD-303, Service Manual, Page: 21 / 36

AO AQ AS AU AW AP AR AT AV AX
2
1
3
5
7
4
6
1
2
3
4
5
6
7
11
12
13
14
15
Lch IN
A.GND
Rch IN
ATT
BEEP
CHECK
SELF
PROTECTION
SP RELAY
H.P Lch
H.P Rch
1 2 3
POW
.GND
+B -B
1 2
R1
1.5K
1.5K
R2
680
R3
680
R4
2.2K
R6
2.2K
R5
2.2K
R10
R9
2.2K
Q1,2
Q3,4
100K
R12
100K
R1
1
0.22u50
+
0.22u50
+
R14 47K
R13 47K
470P
C4
470P
C3
C12
100P
3K
R18
3K
R22
3K
R17
3K R21
12K R16
12K
R15
Q5-8
240 R27
240 R28
330P
C10
330P
C9
R25
10u35
+
10u35 +
R26
R43
22
22 1/4W
R44
22
R41
47P
C25
1.2K
R39
W67
R49
330
VR1
3.3K R37
1/4W
1/4W
13K
6.8K
R35
R31
R33
1/4W
13K
100u50
C29
+
100P
C11
R42
22 1/4W
VR2 330
100u50
C30
+
W61
1.2K
R40
13K
R32
R50
6.8K
R36
13K
R34
R38 3.3K
1/4W
1/4W
1/4W
Q9,10
R127
10u16
C81
+
5.6K
R123
100
R133
Q11,12
0.01
1K
R99
C82 10K
R126 33K
R125
10K
R124
R51
R53
3.3K
R59
3.3K
R61
0.01 C35
C33
1.6K
R57
R55
R46
R48
3.3K
R62
3.3K
R60
R56 C34
C36 0.01
1.6K
R58
C43
C41
10 1/4W
R71
W64
10 1/4W
C42 W65
C44
R72
Q13,15
Q14,16
R84 15K
10K
R83
R63 4.7K
39K R81
R64
4.7K
24K R86
100u10
C51
+
39K R82 15K R87
1
2
3
4
1
2
3
4
47K
R102
2.2K
R103
5
12
11
4700P
C62
4700P
C61
K1
Lch
Rch
GND
DET
ON
OFF
C72
+
150
R112
1/4W
11
12
5
1/4W
1/4W
R106 1.2K 2W
UNIT No.
0-11
EUROPE
DESTINATION
COUNTRY
U.S.A.
ABB.
K
E,E1
R39,40,
106
R49,
47K
50
A
NO
YES
C41,
42
NO
C43,
0.1
44
D5,
6
W61,
YES
67
47u63
C72
2SD2493A
Q13,14 Q15,16
2SB1624A
VR1,
NO
2
CN3
NO
1K
R30
47K
R24
C16
C26 47P
R131 330 2W
R132 330 2W
C15
47K
R23
1K
R29
MTZJ18(B) or
HZS18N(B2) MTZJ13(B) or
HZS13N(B2)
D3,4 D7,8
P1
100
R128
10u16
C83
+
MATRIX
R130
680
R25,
26
1.2K
56
R55,
+12V
+B
+B +B
+12V
B B
+12V
B
+B
+B +B
+B
+B
+B
B
BB
+B
+B
9
8
10
CONT.
MUTE
+12V
56P
C5
2.2K
R20
R19
2.2K
1M
R7
1M
R8
C1
C2
100P
C17
C19 220P
220P
C20
C13
C14
R65 560
R45
R47
R85
1K
R52
R54
R66 560
1/4W
4
R
TN.GND
10u100
C18
+
R105 3.3K 1W
R104 3.3K 1W
4 3
1K
B
+B
14
33u16
C21
+
47K R96
10K R94
1M
R95
0.47u50
C8
+
R93
R91
220K 220K
R92
14
2-72 YES 1.3K
NO
R51-54,
104,105 R45-
48
2W
0.22
4.3K
5.1K
R93
YES 0.22
0.022
C33,
34
MTZJ20(B) or
HZS20N(B2)
HZS16N(B2)
MTZJ16(B) or
NO
YES
67
YES
W61, R55,
1K
1.2K
P
EUROPE
CANADA
2-71
E,E1
YES
0-10 NO
ABB. COUNTRY
DESTINATION
UNIT No. A
NO 470
0.47
2W
YES 1K
106
R39,40, R25,
26 48
R45-
104,105
R51-54,
50
R49,
56
C72
47u63
0.033
4.3K
3.9K
YES 0.22
NO 0.1
C33,
R93
34
C41,
42 44
C43,
NO
YES
MTZJ20(B) or
HZS20N(B2)
HZS18N(B2)
MTZJ18(B) or
MTZJ16(B) or
HZS16N(B2)
MTZJ24(B) or
HZS24N(B2)
D5,
D3,4
6
D7,8
2SB1647 2SD2560 YES YES
Q15,16 Q13,14
2
VR1,
CN3
K U.S.A.
680 YES
0.22
2W
NO 47K 0.022
22u100 NO
2SB1624A 2SD2493A NO NO
67
W61,
1.2K
R55,
T U.K.
X AUSTRALIA
2-71 YES
ABB.
DESTINATION
COUNTRY
UNIT No.
A
YES 680
0.22
2W
NO 47K
R39,40,
106
R25,
26
R45-
48
R51-54,
104,105 R49,
50 56
47u63
C72
0.022 4.3K YES 0.22
C33,
R93
34
C41,
42
C43,
44
YES
MTZJ20(B) or
HZS20N(B2) MTZJ16(B) or
HZS16N(B2)
D5,
6
D3,4 D7,8
2SB1624A 2SD2493A YES NO NO
Q15,16 Q13,14
VR1,
2
CN3
E,E1
EUROPE
D7,8
6
D3,4
44 42 34 56 50 104,105 48 26 106
NO
COUNTRY
CANADA
U.S.A.
ABB.
K,K1
P,P1
0-10
2W
0.47
470 NO 1K YES 3.9K 1K NO 0.033 0.1
MTZJ18(B) or
HZS18N(B2)
22u100
HZS24N(B2)
MTZJ24(B) or
NO
DESTINATION
UNIT No.
R45-
A
R25, R39,40, R49, R51-54,
R93
R55, C41, C33, C43,
C72
D5,
2
Q13,14 Q15,16
2SD2560 2SB1647 YES YES
VR1,
CN3
YES
GENERAL MARKET M,M5
COUNTRY
PX
DESTINATION
UNIT No.
ABB.
Y
2-71
2W
48
R45-
0.22
R39,40,
A
R25,
26
680
106
YES
R49, R51-54,
50
47K
104,105
NO
R93
R55,
4.3K
56
1.2K
C41, C43, C33,
42
YES
34
0.022
44
0.22
HZS16N(B2) HZS20N(B2)
MTZJ20(B) or
D3,4 C72
47u63
D7,8
D5,
MTZJ16(B) or
6
YES 2SD2493A
Q13,14
VR1,
Q15,16
2SB1624A
2
NO
CN3
NO
U.K.
AUSTRALIA
T,T1
X
EUROPE E,E1
Q44
Q43 Q42
0.47 2W
0.47 2W
0.47 2W
0.47 2W
0.22
R97
47K
NO
65
W64,
NO
YES
W64,
65
W64,
YES
65
NO
Q9,10
2SC2631(R,S)
2SC1845(F,E)
Q9,10
2SC1845(F,E)
Q9,10
2SC1845(F,E)
2SC2631(R,S) NO YES
W61,
67 65
W64,
Q9,10
Q9,10
2SC1845(F,E) YES
67
NO
65
W61, W64,
A A
B
A
B A
3.9K 2W
0.22
C15,
16
7P
C15,
16
C15,
16
7P
7P
3P
7P
C15,
16
C15,
16
3P
+12V +12V +12V
+12V
+12V
+12V
10P C86
10P C85
C84 4.7u50
Q21
+
NO
C85,
86
NO
YES
86
C85,
C85,
NO
86
C85,
YES
86
C85,
NO
86
HZS18N(B2)
MTZJ18(B) or
R49,
2-72
UNIT No.
COUNTRY
PX
AUSTRALIA
U.K.
EUROPE
GENERAL MARKET
DESTINATION
T
KOREA H
E,E1
M,M5
X
ABB.
Y
YES 680
A
R25,
26
0.22
YES
2W
47K
R45- R39,40,
106 48 50
5.1K NO 1.3K
R51-54,
104,105 R55,
56
7P 0.022
16
C15,
R93
C33,
34
47u63
C72
0.22 YES
44
C43, C41,
42
NO
C85,
86
D3,4
VR1,
HZS13N(B2)
MTZJ13(B) or
YES
D5,
6
D7,8
YES NO
67
W61, W64,
65
Q13,14
2SD2493A 2SC1845(F,E)
Q9,10
2SB1624A
Q15,16
NO NO
2
CN3
HZS20N(B2)
MTZJ20(B) or
R49,
UNIT No.
0-11
COUNTRY
CANADA
U.S.A.
DESTINATION
P
K
ABB.
A
NO 680
R25,
26
R45-
0.22
YES
106
R39,40,
2W
47K
48 50
4.3K
R51-54,
NO
104,105
1.2K
56
R55,
16
C15,
7P
R93
0.022
C33,
34
C72
47u63
44
C43,
0.1 NO
C41,
42
NO
C85,
86
D3,4
VR1,
NO
MTZJ16(B) or
HZS16N(B2)
NO
6
D5,
D7,8
W61,
67
NO YES
W64,
65
2SD2493A
Q13,14
2SC1845(F,E)
Q9,10 Q15,16
2SB1624A NO
2
CN3
OFF: -1.6V
ON: 2.1V
MUTE
-40.7V
-40.3V
0.6V
0V
-41.3V
-1.2V
-0.6V
42.4V
0V
43.5V 43.5V
0V
0V
12.7V
37.0V
-40.7V -40.3V
0.6V
0V
2.9V
0.7V
41.8V
-41.3V
-42.0V
-1.2V
-0.6V
1.2V
0V
42.4V
0.7V
2.9V
0.7V
13.2V
0V
12.7V
42.5V
1.2V
0V
4.25V
-1.2V
0V
1.2V
0V
-1.0V
-1.2V
0V
-1.0V
43.5V
0V
12.2V
22.0V
ON: 0.7V
POWER
1.2V
12.2V
1.2V
CN1
CN2
CN3
Q3
Q1
Q2 Q4
-10dB
ATT
MUTING
Q6
Q8
Q5 Q7
DIFFERENTIAL
AMPLIFIER
Q9
Q10
Q13
Q15
Q14
Q16
Q11
Q12
VOLTAGE
AMPLIFICATION
D3
D1
D2
D4
D7
D8 D6
D5
D30
TEMPERATURE
COMPENSATING
D32
D33
Q43
Q42
D11 D15
D13
Q17
Q19
Q20
Q18
D12 D16
D14
POWER
AMP
AMP
POWER
PROTECTION
/CURRENT
CURRENT
LIMITER
PROTECTION
/CURRENT
LIMITER
CURRENT
D21
Q21
E2 E1
WH1
D31
Q31
Rch 2
Lch 1
FRONT
SPEAKER OUT
RELAY
SPEAKER
SWITCH
ON/OFF
Q22
Q23
VOLTAGE
PROTECTION
PROTECTION
IDLING
1 Rch
2 Lch
S1
J2
J4
A
2/4
X13-
CN4
RXD-303/303E (X07-316X-XX)
Q1,2
: 2SC2878(B)
Q3,4
: 2SD2144S(U,V)
Q5-8,19-21
: 2SA992(F,E)
Q9,10
:
Q11,12
: 2SC4137F50(V,W)
Q13,14
:
Q15,16
:
Q44
: 2SC2003(L,K)
Q42
: 2SA954(L,K)
D1,2,5,6,9,10,13-16,31,33
: 1SS133 or
HSS104A
D3,4
:
D7,8
:
D21
: MTZJ5.1(B) or
HZS5.1N(B2)
D30
: MTZJ13(B) or
HZS13N(B2)
D32
: MTZJ10(B) or
HZS10N(B2)
Q44
D10
SURROUND
SPEAKERS
L R
MATRIX
KTC3199(Y,GR)
Q24
:
GND LINE
SIGNAL LINE
B LINE
B LINE
IDLING
(Lch)
(Rch)
IDLING
DRIVER
Q24
D9
CANCEL
BASS
DRIVER
RXD-503/503EX07-316X-XX)
RXD-653/653E (X07-3162-71)
X13-
2/4
WH4
RXD-A53/A53-GR (X07-3160-10)
RXD-553/553E/553-GR/553E-GR (X07-3162-71)
POWER
A CLASS
SWITCHING
Q42 ON/OFF
CONTROLLER +B POWER
SUPPLY SW
Q17,18,22,23,31,43
2SC1845(F,E) :
1SS244
D11,12
:
The Dc voltage is measured
with a RXD-353 (M TYPE).
RXD-353/353E (X07-3162-72)
RXD-A33 (X07-3160-11)
POWER AMPLIFIER UNIT (X07-316X-XX) (A/2)
C
RXD-653/653E (3/4)
RXD-303/303E/353/353E (3/4)
RXD-503/503E/553/553E/553-GR/553E-GR (3/4)
RXD-A33/A53/A53-GR (3/4)
(X07- ) (B/2)
SURROUND UNIT
MATRIX
D
RXD-303/353/503/553/653/A33/A53
Y39-3420-10
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to
parts list).
indicates safety critical components. For continued protection against risk of fire, replace only with same type
and rating fuse(s). 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.
The DC voltage is an actual reading measured with a high impedance type volt-
meter with no signal input. The measurement value may vary depending on the
measuring instruments used or on the product.