Kenwood KRC-665R Service Manual page 12

A B
Q Q
3 7 6 3 1 5 1 5 0
(2/2)
1 to DC CORD
DC-CN
F1 10A
(X14-68XX-XX)
16 15 14 13 12 11 10 9 FUSE J1
8 7 6 5 4 3 2 1
D1
C51
2200u50
+
C52 0.01
Q34
Q36
22K
D16
Q35
22K
2 R83 22K
R84 1K
Q37
1/2W
10K
P-CON
47K
ANT.C
R91
ACC-DET
100K
2
R90 Q39
D18
100K
3
TEL
MUTE
R73
47K
IC8
IC8
2 5.0V
3 RESET
0V or
5.0V
5V
1 0V
4
T E
L 1 3 9 4 2 2 9 6 5 1 3
R254 47K
5V
R253 1K 5V
0V 61
61 EJECT 0V
62
62 CH-REQC
4
5V
5V
0V
0V 63
63 ILL ON
R256 470 5V
64
KEY-REQ 0V
5V
65
65 R-CLK 0V
5V
66
66 PACK-IN 0V
67
5V
VSS0
0V
5.0V 68
VDD1
69
X2
X1
12MHz
70
X1
71
TEST
C165 72
XT2
22P
X2
32.768kHz
C166 73
XT1
33P 74
VDD0
5.0V 75
AVDD
0.6-4.1V 76 5V
PHONE
5 0V
R258 4.7K
77
77 T-MODE
R259 2.2K 0-4.3V
78
78 S-METTER
0V or
5.0V
R260 2.2K 0-3.0V 79
4V 5V
79 NOISE
*
0V 0V
R202 100K 0V or 5.0V 80
TYPE0
0V or
5.0V
0V or 5.0V PANEL
DET
S1
6
+5V
(X14-68XX-XX)
UNIT
MODEL NAME A1 R201 R202 R203 R204 R205 R206
No. w w w
KRC-665R 30-22 X86-3242-70 YES NO YES NO NO YES
KRC-591YV 32-72 X86-3242-70 YES NO YES NO YES NO
KRC-591Y 32-73 X86-3242-70 NO YES NO YES YES NO
42-71 X86-3342-71 YES NO YES NO YES NO
KRC-591V
KRC-591 42-72 X86-3342-71 NO YES NO YES YES NO
CAUTION:For continued safety, replace safety critical components only with manufacturer's
recommended parts (refer to, parts list).
7
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.
C D
13
9
BU
5V
0V C82
POWER
AMP 22u16
+
IC4
5V
0V
9.0V 1.4V
8.2V
BU
Q12 Q13
D2
Q11
BU5V SW5V
R52 100
56
+5V
+5V
D17
5V
0V
0V or
5.0V
R262 100K
40
E2PROM
DET
R245 10K
5V
0V
39 R244 1K
5V IC2-DATA 39
5V
0V
R243 10K
0V
5V 5V
0V 0V
5V
38 R242 1K
0V
IC2-CLK 38
5V 5V
5V 37 R241 1K
0V 0V AFS 37 0V
R240 1K
36
FM+B 36
5V R239 1K
35
0V AM+B 35
34 R209 100K
0V or 5.0V IC2-TYPE0
33
R238 47K
VSS1
5V R237 4.7K
32
0V MUSIC 32
IC1
31 R236 10K
u-COM DOLBY 31
5V
30 R235 4.7K
0V EQ-MUTE 30
R234 4.7K SW14V
29
METAL 29
5V R261 1K Q15
28
0V MS-CONT 28
27 R233 1K
0V or 5.0V FWD/REV 27
26 R231 1K
SUB(+) 26
R229 1K Q14
25
SUB(-) 25
5V 47K
24
5V 0V R-QUAL 24
23
0V
R-DATA 23 47K
5V
22
5V
0V PAN5V 22
5V 0V
21 R228 470
0V
5V
5V 5V L-RST 21
0V
0V 0V 5V
0V
Q23
5V
0V
Q82
10K
47K
+5V
+5V
x a o
. i
Indicates safety critical components. To reduce the risk
E F
CH-CN
J3
11 12 8 4 3 2
1 5 9
10 6 7 5 1
2 6 10
13
BU
3 7 11
B.U.
4 8 12
R102
D34
10K
41
D52
R101
D53
D31
100
D32
IC2
+5V +5V
E. VOL/
MPX
B.U-DET
R85 R86
Q38
24K 10K
5V
1
+5V
Q43
0V
22K
22K
IC3 MUTE
Q Q
3 7
5V Q42
14 5.0V
0V 1
VDD
13
EQ AMP/
5V
DOLBY
0V 2
5V
12 0V
3
5V
11
0V 4 D33
R165 C148
10
2.7k 0.47 4.1V 11
R164 C147
5 4.1V 12
9
6 33K 4700P
5V 2.4V 13
8
0V
7
14
VSS
32
15
16
31
R59 2.2
1/2W 17
A8V 30
Q17 18
R58 2.2 29
+8V 19
1/2W Q16
20
28
R56 R57
1K 1K
22K
5V
22K
0V
Q71
+5V
BU
Q21
+5V
ILLUM
22K
D63 D65 D67 D69
22K Q20
Q61
22K
D62 D64 D66 D68 D70
22K
EJ
C131
+10.5V
0.01
17 15 13 11 9 7 5 3 1
18 16 14 12 10 8 6 4 2
u 1 6 3
y
DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations
between individual instruments or/and units.
G H
2 4
8 9
PRE OUT
FRONT REAR
J2
R134 2.2K
65
5V
RDS DEMODULATOR
R30 22K R29 22K R32 22K R31 22K
0V
Q2 Q1 Q4 Q3 R135 2.2K 1
24 QUAL
R136 2.2K 2
23 RDDA
C125
2.2u50 2.5V 3
VREF
+
C126
2.5V 4
MPX
330P
5.0V 5
OSEL
6
GND
C127 7
1
ARI
+5V 680P
2.5V
+8V 0V 8
FILOUT
Q44
4.7K
5V
0V
79
Q55
5V
3.6V
0V 36
0V
5V
0V
35
R111
4.7K
78
+5V
+8V
PB LEVEL
6 3 1 5 1 5 0 8
R5 C5
2.2K 0.01
1
4.1V
2
3
R3 C3
180 33u50
40
PB FB1
+ 10
G2FB 39
4.1V
PB R IN1
C1
38
9
G1FB L PB GND
4.1V
1500P
5V 37
MSTC 0V PB F IN1 8
R2
MS OUT 7
36 0V 15K
R166
N.C PB REF
IC9
470
4.1V C154
NR SW
33u10
35
VCT 27 6
+
34
66 5
5V PB F IN2
R
MUTE SW 0V 33
PB GND
4 4
TAPE SW 32
R4 C4
PB R IN2
3 3
180 33u50
DR SW 31
PB FB2
R169
+
MS 2
4.1V
470
MODE
1
R171
R6 C6 22K
0.4V
2.2K 0.01
4.1V
R167
100K
PB LEVEL
C149 R168
0.01 470
BU
MOTOR
Q19
Q72
SUB M
IC10
10
Q18 10K
7.6V 1
N.C
VCC
9 7.6V
2
OUT1 4
10K N.C
8
0V or N.C
0V or
5.0V 3
26 IN1 5.0V
4 7 7.6V
25 IN2 OUT2 3
5 6
SGND PGND
R62 470
R63 470
1 2 3 4 5 6 7
CN2 CN3 KRC-665R/591/591V/591Y/591YV (1/2)
m
c o
.
I
2
9 8 9 9
ANT.
J4
IC1 : UPD784225GC159
IC2 : TDA7407D
IC3 : HD74HC02FP or
TC74HC02AF
IC4 : TA8263BH
IC7 : SAA6581T
5V IC8 : S-80830ANNP
IC7
16 0V
IC9 : CXA2560Q
RDCK
15 IC10 : LB1930M
R137 C121
T57
14 2.2K 27P
OSCO
Q1-4,44,55
: UN5216 or
DTC143TUA
C122 Q11,16,38,39
13 27P : 2SC4081
OSCI
Q12,17 : KTA1046
12 5.0V
VCC Q13,35,61 : 2SA1576A
Q14 : UN5213 or
11 *
TUNER
EXTRES A1 DTC144EUA
10
Q15,21,36,42
TM
9 1 : UN5112 or
TSEL RF GND
DTA124EUA
2
FM ANT Q18 : UN5211 or
3
DTC114EUA
AM ANT
Q19 : 2SB1443
+5V
Q20,43,51,53,71
: UN5212 or
+8V
4 DTC124EUA
L4 OSC GND
Q23,72 : 2SD1760
FM+B R121
Q52 4.7uH 5
1K Q34,52,54 : 2SB1434 or
FM +B
Q51 6
2SB1277(Q,R)
AM +B
7 Q37 : UN5214 or
22K R122
OSC GND
C113 8 DTC114YUA
22K
OSC GND
Q82 : UN5114 or
22K
0.01 9
R123 Q54
W/N DTA114YUA
1K
10
Q53 OSC GND
11 D1 : 1N5393G-M5
Vt
22K
R124
12 D2,21,22,25-28
+8V PLL +B
: AM01Z
22K 13
22K
3 IFC OUT
AM+B D3 : MA4056(N)-M
14
16 SDA D4 : MA4091(N)-L
15
SCL D5,13-15 : 1SR154-400
18
16
D6 : MA4110-L
L7 DIG GND
D11 : MA3047-M
4.7uH 17
+5V VDD 5V D16,32 : DAN202U
18
D17 : MA4068(N)-M
NOISE OUT
19
D18 : MA8068-M
RDS OUT
20 D23,24 : S1J
AUDIO OUT
D31,34,82 : 1SS133
21
AMIF OUT
D33 : DAP202U
22
S-METER D41 : IMSA-6801
D51,54,71 : MA3062-M
D52 : MA3062WA
L8 4.7uH
23
+8V IF1 +B D53 : RD6.8MW
24
D61-70 : KDS226 or
IF1 GND
DA204K
9 2 4 9 8 2 9 9
CN5
CASSETTE MECHANISM
(D40-1150-05)
M2 M1
PLAY SUB MAIN
CN1
HEAD
HEADR M M
10
Rch
HEADCOM
9 HD1
7 M+R
HEADL
Lch 6 GND
8
GND T-END
7
5 T-END
STBY
F/R
6
PACKIN 4 STBY
5
3
SUB(+)
4
2 GND
SUB(-)
3
1
MODE+B
PACK
2 +2V
PACK
MODE
1
FWD/REV
(X89-2510-10/2522-70)
CN1
ILL-GND 18
J1
ILL+B 17 +10.5V
1 ILL-GND
VDD 16 +5V
D-GND 15 2 ESD-G
NC/DIMMER 14 14 6 3 L-DATAS
X16-
RST 13 13 4 D-GND
J1
REMO 12 12
7 5 L-CLK
L-INH/L-RST 11 11 2/2
14 6 NC/DIMMER
D/A DATA/NC 10 10
8 7 L-CE
L-DATAL 9 9
A
8 ILL+B
L-CE 8 8 EJECT
9 9 L-DATAL
L-CLK 7 7 S1
10 10 D/A DATA/NC
L-DATAS 6 6
11 11 L-INH/L-RST
D/A CLK/NC 5 5
12 12 REMO
FLIP DET 4 4
13 13 RST
EJECT 3
5 14 D/A CLK/NC
EJECT ILL 2
4 15 FLIP DET
ESD-G 1
+5V 16 VDD