A
B
C
D
E
F
G
I
H
1
2
3
4
5
6
7
Q20,43,51,53,71
Q33,34,52,54
D2,21,22,25-28
D52
D53
D61-70
D33
D51,54,71
D41
D31,34,82
D23,24
D18
D17
D16,32
D11
D7
D6
D4
D5,13-15
D3
D1
Q82
Q32,37
Q23,72
Q19
Q18
MA3062WA
RD6.8MW
KDS226 or
DA204K
:
:
:
MA3062-M
1SS133
DAP202U
IMSA-6801
MA8068-M
:
:
:
:
: S1J
:
MA4068(N)-M
MA4062-L or
HZS6C2L
MA3047-M
DAN202U
MA4110-L
:
:
:
:
:
1N5393G-M5
MA4056(N)-M
MA4091(N)-L
1SR154-400
:
:
:
:
: AM01Z
DTC114YUA
2SB1434 or
2SB1277(Q,R)
UN5114 or
DTA114YUA
UN5214 or
:
:
:
UN5212 or
DTC124EUA
2SD1760
2SB1443
UN5211 or
DTC114EUA
:
:
:
:
Q15,21,36,42
Q1-4,44,55
Q11,16,38,39
Q14,31
Q13,35,61
Q12,17
IC10
IC9
IC7
IC8
IC4
IC3
IC1
IC2
UN5213 or
UN5112 or
DTA124EUA
DTC144EUA
KTA1046
2SA1576A
:
:
:
:
2SC4081
UN5216 or
DTC143TUA
LB1930M
:
:
:
SAA6581T
S-80830ANNP
CXA2560Q
TC74HC02AF
TA8263BH
HD74HC02FP or
:
:
:
:
:
TDA7407D
:
:
*
E
*
A1
D41
PRE OUT
RDS DEMODULATOR
J2
Lch
REAR
GND
Rch
Lch
Rch
FRONT
GND
Q3
Q2
Q1
Q4
CH-CN
J3
D51
D34
D52
Q52
FM+B
Q44
Q55
Q54
Q53
AM+B
Q51
CN5
CN1
D53
D54
D31
D25
D26
D32
D27
D28
Q13
Q12
SW5V
Q11
Q38
B.U-DET
Q43
Q42
D17
D16
J1
DC-CN
D15
Q34
Q36
Q35
D14
D13
Q33
D1
D21
D22
D23
Q37
D24
D2
D3
Q39
D18
ACC-DET
P-CON
ANT.C
Q32
*
C
ANT.C
DIMMER
Q31
TEL
MUTE
D11
*
A
D82
*
D
D7
REMO
WIRED
CN4
BU5V
L
R
SUB M
Q72
MOTOR
Q19
D69
D68
D70
Q18
CN3
D5
CN2
A8V
Q17
D33
D4
Q16
SW14V
Q15
Q14
MUTE
D67
D65
D63
D66
D64
D61
Q61
D62
D71
Q21
ILLUM
Q20
Q23
D6
Q82
Q71
PANEL
DET
S1
UPD784225GC158
CN1
J1
S1
2/2
J1
X16-
(X14-68XX-XX)
A E
D
C
RESET
u-COM
EQ AMP/
DOLBY
MPX
E. VOL/
PB LEVEL
PB LEVEL
J4
ANT.
TUNER
EJECT
Lch
HD1
STBY
T-END
FWD/REV
PACK
Rch
PLAY
HEAD
M
M2
SUB
M
M1
MAIN
to DC CORD
POWER
AMP
(2/2)
4.7K
4.7K
4.7K
4.7K
4.7K
22K
22K
22K
22K
4.7K
22K
22K
22K
22K
22K
22K
10K
47K
10K
47K
47K
47K
10K
10K
22K
22K
47K
47K
22K
22K
22K
22K
10K
47K
22K
22K
0V
5V
5V
0V
2.5V
5.0V
2.5V
5.0V
0V
5V
14.4V
1.4V
1.4V
9.0V
1.4V
2.5V
0V
4.9V
4.3V
5V
4.2V
8.3V
0.3-3.5V
0V
4.2V
4.2V
4.2V
5V
0V
0V
5V
4.3V
4.1V
4.1V
4.1V
4.1V
4.1V
4.1V
4.1V
4.1V
4.1V
4.1V
8.2V
4.1V
4.1V
4.1V
0.4V
4.1V
1.4V
1.4V
0V
5V
5.0V
0V
5V
5V
0V
5V
0V
5V
0V
5.0V
0V or
5V
0V
0V
5V
5V
14.4V
0V
8.2V
5V
0V
5V
0V
5V
0V
5V
5V
0V
0V
5V
0V
5V
5V
0V
0V
5V
5V
0V
5.0V
5.0V
0V or
5V
0V
5V
0V
5V
0V
5V
0V
0V
4.1V
4.1V
5V
0V
4.1V
4.1V
2.4V
0V
5V
4.1V
4.1V
4.1V
1.2V
4.1V
0V
5V
4.1V
7.6V
0V or
7.6V
5.0V
7.6V
5.0V
0V or
0V
0V
5V
5V
5V
0V
0V
5V
0V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
0V
5V
5V
0V
5V
0V
0V
5V
5.0V
5V
5.0V
0.6-4.1V
0V
0-4.3V
0V or
5.0V
0V
5V
0V
5V
0V
0V
5V
5.0V
0V
4V
5.0V
0V or
0-3.0V
0V or 5.0V
0V or 5.0V
0V or 5.0V
0V or 5.0V
5V
5V
0V
3.6V
4.1V
0V
5V
0V
5V
0V
5V
0.4V
IC7
IC2
IC3
IC4
IC8
IC9
IC10
IC1
(X14-68XX-XX)
A
(X89-2510-10/2522-70)
CASSETTE MECHANISM
(D40-1150-05)
C121
27P
C122
27P
1
RF GND
L3
2
3
AM ANT
FM ANT
5
6
OSC GND
FM +B
4
L4
4.7uH
8
7
OSC GND
OSC GND
11
10
W/N
OSC GND
9
C113
0.01
13
12
PLL +B
IFC OUT
16
15
SDA
SCL
14
+8V
3
18
16
Vt
AM +B
C111
0.01
18
17
VDD 5V
20
19
RDS OUT
AUDIO OUT
NOISE OUT
4.7uH
+8V
0.01
C117
22
AMIF OUT
S-METER
23
24
IF1 +B
L8 4.7uH
21
IF1 GND
DIG GND
L7
52mH
1
2
5
3
65
R134 2.2K
R36
180
R32 22K
16
R137
15
RDCK
T57
OSCO
14
2.2K
2
QUAL
RDDA
3
VREF
13
OSCI
12
11
VCC
4
MPX
6
OSEL
GND
5
X3
4.332MHz
24
23
R136 2.2K
C125
2.2u50
R28
360
C126
330P
C28
RL
10u16
1
R135 2.2K
0.1
C30
R31 22K
R35
180
R34
R30 22K
180
C29
0.1
R33
180
R29 22K
R27
360
R26
360
RR
C27
C26
FL
10u16
10u16
R25
360
REQ C
4.7K
100
CH CLK
C25
2
FR
10u16
62
10
R145
R148
4
7
8
6
11
9
10
13
12
9
1
5
10
2
6
11
3
7
12
4
8
13
B.U.
D GND
Lch
100
R11
10
D
ATA
H
RST
Rch
4.7K
R12
10
D
ATA
C
4.7K
C11
9
8
0.47u50
C12
53
0.47u50
R147
R146
R144
MUTE
4.7K
R13
4.7K
CH CON
10K
41
REQ H
100
C13
54
55
52
R143
R142
R141
4.7
47u6.3
A GND
15
+
24
22
C83
1u50
PGND
MUTE
20
18
1.5K
16
14
12
C84
0.1
R105
VCC
PGND
IN4
IN2
A
CGND
R106
47K
BU
R102
10
9
TM
TSEL
C127 7
680P
ARI
FILOUT
8
+8V
1K
R121
+5V
+5V
L9
R132
4.7K
79
15
16
4.7uH
22K
R122
1K
R123
36
22K
R124
35
14
13
0.1
MP IN
MP OUT
N.
C
N.
C
38
39
18
17
R113
20
21
22
23
19
RR
+8V
C91
24
25
26
27
28
FR
FL
L2 4.7uH
C92 0.01
100u10
RL
12
11
10
9
8
7
6
5
LEVEL
MPX
AM
N.
C
CH R
CH L
AFS
T
APE R
CH GND
3
2
1
+
VREF
CREF
T
APE L
4
QU
A
L
SCL
SMUTE
SD
A
VDD
GND
OUT RR
OUT FR
OUT FL
A
C
OUT R
A
C
OUT R
OUT RL
4.7K
+8V
4.7K
2
1
3
33u50
180
C3
R3
C94
C18 150P
R15 10K
R16 4.7K
R
G
L
37
C17 0.01
+8V
C5
0.01
R5
2.2K
VR1
R161
4.7
+
47u16
0.1
C7
10K
1
2
40
39
PB FB1
PBTC1
PB OUT1
3
5
6
4
OUT REF1
T
APE IN1
VCC
N.C
C143
C141
0.1
7
8
9
10
G2FB
LINE OUT1
TCH1
TCL1
MSLPF
11
C148
0.47
0.1
C95
R111
0.47
C16
C15
0.033
C93
2.2u50
C9 1
C10 1
L
R
G
100
+5V
1.8K
25
23
21
C21
0.22u50
C65 0.047
FL+
FL-
10K
R21
19
17
13
11
15
C67 0.047
C66 0.047
RL-
C23
C68 0.047
0.22u50
RL+
R23
10K
10K
FL
+5V
BU
RL
FR
R53
2.2K
C55
C56
100u6.3
R54
22K
R104
TH1
R101
1
2
+5V
+8V
C85 0.01
14
13
VDD
12
11
10
+5V
R86
10K
R88
R85
24K
R87
10K
C77
1000P
L11
4.7uH
C162
0.01
C161
47u6.3
41
1
3
4
5
2
R262 100K
R245 10K
DET
40
E2PROM
P-MUTE
R244 1K
R243 10K
R242 1K
R241 1K
39
IC2-DATA
38
IC2-CLK
39
38
22K
10u10
R165
2.7k
EXTRES
CD
OUT4-
OUT3-
IN3
SGND
IN1
C123 0.01
OUT4+
OUT3+
C124
10u6.3
42
BU
C81
0.47u50
10
8
6
4
C82
22u16
SVR
VCC
PGND
ST
-BY
2
BU
BU
PGND
R107
10K
FUSE
16
14
15
B.
U
.
BU
GND
AC
C
TEL MUTE
DIMMER
P
. CON
1
3
2
13
11
12
10
9
RR+
FR-
RR-
FR+
RR+
RR-
FR-
FR+
ANT CON
FL-
RL-
RL+
FL+
FL-
RL+
FL+
RL-
4
6
5
7
8
L1
10
+B
11
2
C75 0.068
C74
3.3u25
R83 22K
R77
4.7K
*
W1
22K
R80
R81 4.7K
C52 0.01
C51
2200u50
9
7
5
C22
C61 0.047
FR+
C62 0.047
C63 0.047
RR+
FR-
R22
3
1
C64 0.047
0.22u50
RR-
50
51
C24
R24
10K
BU
R51
22K
C54
0.01
C53
100u25
RR
2
R90
100K
100K
R91
R84 1K
1/2W
1/2W
R82 1K
1K
1/2W
1K
1/2W
R79
R78
R75
100K
1u50
C72
0.022
R76
2.2K
+5V
C73
R74
10K
11
R73
47K
10K
R71
C71
0.01
10
42
43
44
1K
R246 47K
46
RE
45
+5V
52
53
50
51
54
55
58
57
49
42
43
44
P-STBY
MUTE
45
46
47
48
B
.U-DET
DIMMER
PRE MUTE
A
CC-DET
DIMMER-CON
49
50
52
53
51
P-CON
CH-RST
54
55
57
58
56
P-ON
M
OTO
R
CH-CON
M-STBY
ANT
-CON
CH-REQH
CH-MUTE
REMO
R247 100K
R248
R250
2.2M
R249
2.2K
100K
R251
RE
60
RST
R252
100K
1
2
1
R65
1K
2
3
59
60
RESET
C164
1
61
EJECT
63
64
CH-REQC
KEY-REQ
ILL ON
62
61
62
63
R255
100K
R253 1K
R254 47K
R256 470
4
59
T
-END
R93 100K
C79 0.01
R92
0.01
C78
1/2W
R89
3.3K
33K
48
*
R72
REMO
N.C
OUT1-
OUT2-
TA
B
0.1u50
C76
OUT1+
OUT2+
R52 100
0.22u50
41
HEADL
HEADCOM
GND
9
8
7
470
R166
PACKIN
F/R
SUB(+)
6
5
27
66
4
4
R2
1500P
15K
R1
C154
15K
77
C2
33u10
33u50
C4
180
R4
1500P
MODE+B
MODE
470
2
R169
1
R171
22K
R168
SUB(-)
3
3
38
37
PB GND
PB F IN1
36
PB REF
VCT
35
34
PB F IN2
31
32
PB GND
PB R IN2
33
G1FB
MSTC
MS OUT
N.C
12
13
C147
4700P
15
16
32
14
MUTE SW
TAPE SW
10u10
C146
18
19
30
29
17
NR SW
31
PBTC2
C6
0.01
30
29
R6
2.2K
GND
DIREF
28
26
25
27
0.1
20K
R162
C8
VR2
10K
TCH2
TCL2
MS
MODE
MS SW
24
23
22
21
20
28
0.1
C142
PB FB2
PB OUT2
OUT REF2
T
APE IN2
DR SW
LINE OUT2
10
4
C152
8
0.22
9
N.C
1
N.C
OUT1
N.C
3
2
VCC
3
6
7
C153
0.22
PGND
OUT2
SGND
IN2
5
4
IN1
22
R170
R60
1K
R61
10K
C151
0.1
57
1/2W
C150
10u10
BU
25
58
59
R63 470
7
N.
C
6
5
4
3
GND
N.
C
STBY
T
-END
C131
0.01
61
EJ
17
R191
240
R189
1K
R190
1K
1
1
ESD G
M+B
2
3
4
EJECT
R62 470
GND
2
26
C149
8
+8V
44
43
R57
1K
C59
220u10
6
VSS
7
BU
RST
R240 1K
R209 100K
R239 1K
AFS
36
FM+B
34
AM+B
IC2-TYPE0
35
R237 4.7K
31
R236 10K
R235 4.7K
32
VSS1
MUSIC
31
30
DOLBY
EQ-MUTE
R238 47K
33
37
36
35
32
30
R56
1K
10K
C58
R55
R234 4.7K
R261 1K
R233 1K
R231 1K
29
28
METAL
27
26
FWD/REV
MS-CONT
R229 1K
24
25
SUB(-)
23
22
PAN5V
R-DATA
R-QUAL
SUB(+)
29
28
27
26
22
23
24
25
100u16
R59 2.2
1/2W
R58 2.2
1/2W
47K
R192
4.7K
22
R193
12
14
13
R188
100
R187
100
11
21
470
R186
1K
R184
470
R185
6
5
8
7
L CE
L CLK
L
D
ATA
S
9
11
10
L RST
N.
C
L
D
ATA
L
60
45
R183
1K
1K
R182
4.7K
R181
14
13
RESET
16
15
18
17
D-GND
ILLUM G
P
AN 5
V
ILLUM+B
49
12
REMO
BU
BU
750
R64
21
L-RST
ILL/DSI
N.
C
EJECT
-
PLL-CLK
19
18
20
EJ
18
R225 470
R226 4.7K
63
R228 470
21
R164
33K
N.
C
FLIP DET
EJECT ILL
DIM CON
66
67
68
R-CLK
VDD1
VSS0
PACK-IN
70
12MHz
X1
71
72
X2
TEST
X1
69
65
66
C165
73
X2
32.768kHz
76
75
74
AVDD
VDD0
XT1
77
78
C168
1000P
S-METTER
T-MODE
PHONE
22P
C166
33P
77
78
R258 4.7K
R259 2.2K
XT2
BEEP
FLIP-DET
PLL-D
A
T
A
L-CLK
L-D
A
T
A
S
L-D
A
T
A
L
L-CE
17
16
15
R223
2.2K
14
13
12
11
R216
470
CH-CLK
CH-D
A
T
A
H
CH-D
A
T
A
C
A
VREF1
P
ANEL-DET
IC2-TYPE1
10
9
8
6
5
R212 1K
7
17
15
16
13
12
11
14
9
8
10
R224 100K
R218 1K
R219 1K
R220 470
R221 470
R222 4.7K
R217 100K
R215 100K
R214 100K
C163 0.22
R213 470K
R207 100K
TYPE2
TYPE1
IFC OUT
79
80
100K
TYPE0
NOISE
4
3
2
1
79
*
R201
*
R202 100K
R260 2.2K
3
R211 1K
R205 100K
R203 100K
A
VSS
HEADR
10
C1
PB R IN1
9
37
65
0.01
470
D/A DATA/NC
L-INH/L-RST
NC/DIMMER
ILL+B 17
ILL-GND 18
10
14
VDD 16
D-GND 15
REMO 12
RST 13
11
L-CLK
7
L-DATAL
9
L-CE
8
D/A CLK/NC
5
L-DATAS
6
FLIP DET
4
EJECT ILL
EJECT
3
2
ESD-G
1
L-DATAS
3
ILL-GND
1
ESD-G
2
D/A DATA/NC
10
NC/DIMMER
L-CLK
5
D-GND
4
6
ILL+B
L-CE
7
8
L-DATAL
9
L-INH/L-RST
REMO
11
RST
12
13
D/A CLK/NC
FLIP DET
14
15
VDD
16
4
5
7
6
10
9
8
11
14
12
13
6
7
14
8
11
10
9
12
13
5
4
+5V
+5V
+5V
+5V
+10.5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+B
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+10.5V
+5V
+5V
48
KRC-691Y
KRC-765
MODEL NAME
KRC-691
X86-3342-71
NO
42-70
YES
UNIT
No.
A1
YES
NO
32-71
30-20
YES
NO
YES
NO
X86-3242-70
X86-3240-11
YES
22K
NO
R201
R72
R202
YES
W1
22K
100K
YES
NO
NO
YES
YES
NO
YES
56
56
IC8
46
F1 10A
78
6
3
1
2
5
4
7
9
8
GND
STBY
2
1
3
4
M+R
GND
T-END
5
7
6
FWD/REV
10
PACK
+2V
1
+
R163 220K
C145 0.47
C144 0.033
100K
R167
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+5V
+
+
+
+
+
+
+
+
KRC-765/691/691Y (1/2)
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.
