Kenwood KRC-20SA User manual

©2002-1 PRINTED IN JAPAN
B51-7881-00 (N)1924
CASSETTE RECEIVER
KRC-20SA/G
SERVICE MANUAL
40Wx4
HIGH POWER
KRC-20S
LOUD
PWR
OFF
AMEAUTO ADJ
CLK
SRC
AUD
T. CALL
A. ADJ
CRSC
REW
PR FF OG
Lever
(D10-3031-04)x2
Plastic cabinet assy
(A02-1486-13)
Escutcheon
(B07-2124-02)
Knob (ATT)
(K25-1388-03)
Cassette lid
(A53-1638-13) Panel assy (A64-2519-02)
Mounting hardware assy
(J21-9491-13)
DC cord
(E30-4959-05)
Antenna adaptor
(T90-0523-05)

KRC-20SA/G 2
BLOCK DIAGRAM
IC1
KEY
PAN 5V
MUTE
B.U. DET. B.U.
ACC
POWER IC
EQ. AMP.
CH ISO AMP
NC/MPX/
E-VOL.
FRONT Lch
FRONT Rch
REAR Lch
REAR Rch
J2
LCD DRIVER
LCD
MAIN
TAPE MECHA.
IC5
IC2 IC4, Q151
IC3,Q150
SP OUT
PAN IN SW ACC DET.
P-CONT.
J2
IC1
FM+B
Q200,201
AM+B
Q202,203
AM BPF
FM BPF
Q320
Q50
Q350-353
Q53
SW 5V
Q54-57
COM+B
Q58-61
ILLUMI.
B.U. 5V
Q51,52
SYSTEM u-COM
RST SW
Q301
MOTOR SW
RST
Q260,261
ED1 Q1
FM ANT
AM ANT
RF GND
FM+B
AM+B
OSC GND
OSC GND
OSC GND
VT
PLL +B
IFC OUT
SDA
SCL
DIG GND
IF1+B
IF1 GND
S-METER
IF2 GND
SD
FM+B
SW5V
ACC DET
B.U. DET
SCL
MUTE
SDA
P CON
PANEL HOLD L CLK L DATA S L DATA L FWD/REV MOTOR
Rch
COM
Lch
MP IN
AM
MPX
OUT RR
OUT LR
OUT RF
LEVEL
SCL
SDA
OUT LF
STBY
MUTE
Rch
Lch
T-MUTE
FWD
REV
B.U.5V
B.U.
8V B.U.
S MUTE
4
65
B.U.5V
AM+B
VDD 5V
PACK IN L RES
ANT CON
BEEP
SVR
AMP. STBY
SVR
AC GND (BEEP)
Rch Lch
8V
RF GND
OSC GND
IF2 +B
AUDIO OUT
8V
S-METER
SD
PLL CLK
PLL DATA
PLAY
HEAD
R
L
55.6mV
B.U.5V
SW5V
8V
B.U.5V
AM: 170mV
FM: 400mV
TAPE
PACK IN
(FF/REW)
AMP. MUTE
FF/REW
B.U.5V
ILLUMI.
(X16- )
(X14- )
M
A1
5V
D200
P-CONT.
/ANT-CONT.

KRC-20SA/G
3
● SWITCH UNIT (X16-1492-XX)
COMPONENTS DESCRIPTION
Ref.No.
Component Name Application/Function Operation/Condition/Compatibility
IC1 LC75853NE LCD driver with key-matrix
Q1
DTA114EK or UN2111 or
KRA102S
Key-matrix permission SW Ready on key-matrix
● SYNTHESIZER UNIT (X14-6852-71)
Ref.No.
Component Name Application/Function Operation/Condition/Compatibility
IC1 LC72366-9592 System MI-COM. System control
IC2 TDA7461ND E-VOL. & N.C. MPX Controls sound volume. Selects each source.
IC3 HD74HC27FP Mute logic 3-input NOR gate ×3
IC4 TDA7384A Power IC Amplifies power so that the speaker can drive audio signal.
IC5 LA3161 Equalizer amplifier Equalizer amplifier for cassette tape sound
Q50
2SC2412K or 2SD601A
BACK-UP detection
While BACK-UP is added, a base becomes Hi, and Q50 is
(Momentary power down detection) SW turned on.
Q51 2SB1443 BACK-UP 5V AVR While BACK-UP is added, AVR outputs +5V.
Q52
2SC2412K or 2SD601A Q51 and Q52 is inverted Darlington connection.
Q53
DTA114YK or UN2114 or
KRA107S
P.ON 5V SW While a base becomes Lo, Q53 is turned on.
Q54
DTC144EK or UN2213 or
KRC104S
COM+B SW While Q54's base becomes Hi, Q55 is turned on.
Q55
DTA124EK or UN2112 or
Works during POWER ON mode.
KRA103S
2SA2057 or 2SB1548 (P) or
Q56
2SB1565(E,F) or While Q57's base becomes Hi, Q56 is turned on.
2SB1655(E,F)
COM+B AVR Q56 and Q57 is inverted Darlington connection.
Q57 2SC2412K or 2SD601A
Q58
DTC144EK or UN2213 or
KRC104S
Illumination +B SW While Q58's base becomes Hi, Q59 is turned on.
Q59
DTA124EK or UN2112 or
Works during POWER ON mode with a panel
KRA103S
attached to the set.
2SA2057 or 2SB1548 (P) or
Q60 2SB1565(E,F) or While Q61's base becomes Hi, Q60 is turned on.
2SB1655(E,F)
Illumination +B driver Q60 and Q61 is inverted Darlington connection.
Q61 2SC2412K or 2SD601A
DTC124EK or UN2212 or
When BACK-UP detection SW or CHANGER RESET SW or
Q150
KRC103S
Electric volume mute SW MI-COM.'s mute works, a base becomes Hi, and Q150
is turned on.
Q151
DTC114YK or UN2214 or When POWER IC RESET is activated, a base becomes Hi,
KRC107S
SVR discharge SW Q151 is turned on.
Q200
DTC124EK or UN2212 or
KRC103S FM +B SW Q201 is turned on when Q200's base becomes Hi.
Q201 2SB1277(Q,R) Works during FM reception mode.
Q202
DTC124EK or UN2212 or
KRC103S AM +B SW Q203 is turned on when Q202's base becomes Hi.
Q203 2SB1277(Q,R) Works during AM reception mode.

KRC-20SA/G
4
COMPONENTS DESCRIPTION
Ref.No.
Component Name Application/Function Operation/Condition/Compatibility
Q260
DTC114YK or UN2214 or
KRC107S Motor +B SW When Q260's base becomes Hi, Q261 is turned on.
Q261 2SB1443 Works during TAPE mode.
Q301 DTA144EK or UN2113 Changer reset SW When a base becomes Lo, Q301 is turned on.
Q320 2SA1037K Panel 5V SW While a panel is attached to the set, a base becomes Lo, and
Q320 is turned on.
Q350 2SB1277(Q,R) P-CON. driver When Q353's base becomes Hi, Q350 is turned on.
Q351 2SA1037K P-CON. protection SW Works when P-CON is being short-circuited on GND.
Q352
DTA124EK or UN2112 or
KRA103S
P-CON. protection inhibit SW Inhibits protection SW function when P-CON works momentary.
Q353
DTC114YK or UN2214 or Q353 is turned on when a base becomes Hi.
KRC107S
P-CON. SW Works during POWER ON mode.
Q370 2SB1277(Q,R) Q370 is turned on when Q371's base becomes Hi.
Q371
DTC114YK or UN2214 or ANT-CON. SW Works during TUNER mode.
KRC107S

KRC-20SA/G
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
● Terminal Description (IC1 : X14-6852-71)
Pin No. Pin name I/O Description Processing Operation
1 XIN I Main clock resonator connection terminal
2 GND - TEST terminal 2 Connected to GND lines.
3 L DATA L I Data input from the LCD driver IC
4 L DATA S O Data output to the LCD driver IC
5 L CLK O Clock output to the LCD driver IC
6 L CE O CE output to the LCD driver IC
7 SDA I/O Data input/output with the E-VOL. IC
8 PLL DATA I/O Data input/output with the F/E
9 PLL CLK O Clock output to the F/E
10 SD I SD input from the F/E Hi : Station detected
11 DATA C I Data input from changers
12 DATA H O Data output to changers
13 CH CLK I/O Clock input/output with changers
14 - O - N.C. (Not used)
15 MOTOR O Cassette motor on/off output Hi : Motor ON
16 SCL O Clock output to the E-VOL. IC
17-24 - O - N.C. (Not used)
25 AM+B O AM+B ON/OFF output Hi : during AM reception
26 FM+B O FM+B ON/OFF output Hi : during FM reception
27 PACK IN I Cassette tape Pack-in detection input Lo : Pack-in
28 FF/REW I FF/REW detection input Lo : FF/REW, Hi : PLAY
29 GND I - Connected to GND lines.
30 GND I - Connected to GND lines.
31 VDD - Positive power supply connection terminal Connected to B.U. 5V lines.
32 REQ C I Request input from changers Lo : Request
33 MUTE O Audio mute on/off output Hi : Mute ON
34 CH CON O Changer control Lo : Standby, Hi : ON
35 REQ H O Request output to changers Lo : Request
When the momentary power down, after ACC
36 SVR O Power IC reset terminal ON/OFF is detected and after POWER OFF,
the output becomes Hi temporarily.
37 AMP STBY O Power IC standby control output Hi : POWER ON mode
38 AMP MUTE O Power IC mute control Lo : Mute
39 P CON O Power control Hi : POWER ON mode
40 ANT CON O Antenna control Hi : during FM/AM reception
41 SW5V O SW 5V control Lo : POWER ON mode
42 ILL O Illumination AVR ON/OFF control terminal Hi : POWER ON mode
43 - O - N.C. (Not used)
44 BEEP O BEEP sound output
45-47 - O - N.C. (Not used)
48 ROLL OFF I Roll off input Pull down to GND lines. (Not used)
49 NOISE
CANCELLER I Noise canceller input Pull down to GND lines. (Not used)
50 SEL1 I Destination input 1 Hi : KRC-20S
51 SEL2 I Destination input 2 Hi : KRC-20S
52 SEL3 O Destination input 3 N.C. (Not used)

KRC-20SA/G
6
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin name I/O Description Processing Operation
53 EQ MUTE O Tape equalizer mute on/off output N.C. (Not used)
54 FWD/REV I FWD/REV mode detection input Lo : REV mode
55 - O - N.C. (Not used)
56 REMO I Data input from the remote control N.C. (Not used)
light sensor
57-60 - O - N.C. (Not used)
61 ACC DET I ACC detection input Hi : ACC ON
62 B.U. DET I Momentary power down detection input Hi : When momentary power down detected or
B.U. OFF, Lo : B.U. ON
63 S METER I S-meter input from the F/E
64 PANEL I Panel detaching detection input Lo : Panel not detached
65 GND I - Connected to GND lines.
66 GND I - Connected to GND lines.
67 HOLD I MI-COM. HOLD input Lo : Hold
68 VDD - VDD connection terminal Connected to B.U. 5V lines.
69 GND I - Connected to GND lines.
70 GND I - Connected to GND lines.
71,72 - O - N.C. (Not used)
73 VDD - Positive power supply connection terminal Connected to B.U. 5V lines.
74 GND I - Connected to GND lines.
75 GND I - Connected to GND lines.
76 VSS - Ground connection terminal Connected to GND lines.
77,78 - O - N.C. (Not used)
79 GND - TEST terminal 1 Connected to GND lines.
80 XOUT O Main clock resonator connection terminal

KRC-20SA/G
TEST MODE / ADJUSTMENT
1. How to enter the test mode
• Reset the unit while holding the FM key and preset 6 key.
• All indication segments go ON at the beginning of the test
mode.
2. How to release the test mode
• Simply reset the unit.
• (NOTE) The test mode is not canceled by ACC OFF,
power OFF, momentary power down or the panel off.
3. Audio adjustment
• Set the volume level to -10dB (which is shown as "30" on
the display).
• Loudness OFF.
• The BASS / TREBLE and BALANCE / FADER controls
can be set to the full boost / full cut and full right / full left
and full front / full rear respectively by pressing the Track
Up / Track Down keys.
• Sound coordination doesn't appear for the Audio mode
feed.
Set the controls and switches as follows.
BALANCE : center position BASS : center position LOUDNESS : OFF
FADER : center position TREBLE : center position
(2-LINE TAPE)
B
A
B
A
(FWD)
(RVS)
HEIGHT
(FWD)
HEIGHT/AZIMUTH
(FWD) HEIGHT/AZIMUTH
(RVS)
TAPE SPEED
HEIGHT
(RVS)
F''
F
R
R
TEST MODE
ADJUSTMENT
7
ITEM TAPE OUTPUT
SETTINGS RECIEVER SETTINGS
ALIGNMENT
POINTS
No.
HEAD
HEIGHT
HEAD
AZIMUTH
SCC-1659
TCC-153
10kHz
-
Connect an AC
voltmeter and
oscilloscope to
SP outputs.
TAPE PLAY
TAPE PLAY
Head
Height
Screw
Head
Azimuth
Screw
ALIGN FOR
1) During FWD transport adjust ⁄Fand ⁄
F' so that line A
of 2-LINE TAPE passes through the center of the
head shield plate (core center area)
2) During RVS transport adjust ⁄
Rand ⁄R' so that line B
of 2-LINE TAPE passes through the center of the
head shield plate (core center area)
3) After the alignment above, reverse the transport
direction and check the FWD alignment again. If it
is deviated, perform alignment again. (Tape used :
SCC-1659, manufactured by A-BEX)
Adjust the azimuth for each L ch/R ch or FWD/RVS
becomes maximum.
[1]
[2]
CASSETTE DECK SECTION

ABCDE
1
2
3
4
5
6
7
AM
FM
AUD
PL1
RST654321
PL2
ATT
CLIKAUTO
SRC
129
D2
D1
D4
D3
D5
D6
D7
D8
D9
D10
D11
D12
D14
D15
D13
X16-1492-xx (J74-1298-02)
PC BOARD
Refer to the schematic diagram for the values of resistors and capacitors.
(COMPONENT SIDE VIEW) (FOIL SIDE VIEW)
8
X16-1492-xx (J74-1298-02)
R13
R14
R18
R8
R11
R12
R19
C4
C2
C1 C5
R3
R4
R2
R1
R21
R20
R5
R6
C6
6449
48
12
33 16
1
1732
11
1
2
EB
Q1
IC1
D17
J1
Ref. No. address
IC1 3D
Q1 4D
X16-1492-xx

FGHIJKLMNO
1
2
3
4
5
6
7
REMO
GND
W100
W28
W75
W85
W22
W33
W73
W67
W72
W65
W13
W96
W35
W200
W36
W68
W64
W15
W8
W31
W71
W69
W27
W79
W76
W34 W39 W43 W46
W51
W98
W99
W23
L3
R50
R65
R351
R353
R66
W48
W10
X1
C50
C17
C18
C160
C152
C55
W40
W20
C15
C16
C161
C350
C352
C162
C450
C451
C150
C159
C56
C58
C53
C57
W58
W94
W95
W101 W54 W41
W53 W29
W12
W16
W18
W7
R261
L5
R260
L4
C402
C400
C401
W5
W14
W17
W11
C4
C3
C9
C250
C10
W92
W9
W70
W59
W30
W25
W50
W24
W87
W80
W97
W93
W89
W88
W103
W86
W90
W78
W61
W3
W2
W1
W56
W82
W44
W47
W83
W19
W74
W81
W49
W77
W37
W63
W32
W55
W102
W57
W52
W60
W62
W38
W84
W42
W21
W45
L1
4.5MHz
R202
R55
R67
R350
R370
W105
R371
L8
C206
L9
R373
R116
W26
C320
R138
R132
916
18
25 1
224 2
1765109
3841112 13
LR
1
24
2
1
6
1
1
5
1
8
111
122
E
B
E
B
B
E
BE
B
E
B
E
B
E
B
E
(J74-1317-12)
CN1
Q60
Q56
D411
D405
D352
Q51
Q350
D401
D400
D56
D52
D51
D55
D54
D402
D408
D409
D403
D350
D351/W104
D53
Q201Q203
D200
Q261
D404
D260
IC5
J4
J5
J2
J3
J1
A1
D370
IC4
D50
Q370
D371
D151
D150
D152
P1
WH1
D100
CN2
D261
X14-6852-71
W122
R58
R155
R15
W112
R14
R62
W113
R152
R129
R59
W133
W119
R413
C202
R16
R13
W111
W121
R372
R151
C101
C600
R324
C163
R161
W135
R102
R118
R119
R115
R114
R126
R52
R54
R105
R106
R103
R207
R206
C164
R352
R320
C155
C154
C157
C156
C153
C151
C506
R127
R154
R150
R153
R322
R401
R400
R408 R409
R407
R406
R412
R410
R411
R303 R304
R306
R305
R403
R301
R402
R321
W129
C54
R63 R64
R57
W114
C52
W116
R201R203
R200
C200
C452
C201
R205 R455
R453
R454
R451 R450
R452
R104
C1 C2
C6
C5
C7 C8
R6
R7
R5
R2
R3
R4
C14
R8
C13
R1
C251
R251
R323
W131
W125
C102
C103
W128
W130
R160
W124
W118
R158
W117
W115
W123
R157
R156 R159
R250
R405
R404
R137
W134
W120
R122
R125
R120
R121
R123
R111
R109
W126
R110
W127
R108
W132
R131
C321
TH1
C351
EB
17
148
114
28 15
1
80
64
25
40
24
41
65
EB
EB
BE
BE
EB
BE
EB
EB
EB
EB
EB
EB
BE EB
BE
BE
BE EB
EB
EB
BEBE
Q61
Q52
Q371
Q59
Q58 Q57
Q153
Q151
Q150
Q55
Q54
Q53
Q50
Q353
Q301
Q320
Q352
Q351
Q202
Q200
Q451
Q450
Q260
IC3
IC2
IC1
Ref. No. address
IC1 5J
IC2 5K
IC3 5K
IC4 2J
IC5 5H
Q50 4I
Q51 4H
Q52 4H
Q53 4H
Q54 4H
Q55 3H
Q56 2G
Q57 3G
Q58 4G
Q59 4G
Q60 3G
Q61 3G
Q150 4L
Q151 3J
Q200 4L
Q201 4L
Q202 5L
Q203 4L
Q260 6L
Q261 6L
Q301 6I
Q320 6H
Q350 4I
Q351 4J
Q352 4I
Q353 4I
Q370 3J
Q371 4J
X14-6852-71
PC BOARD (FOIL SIDE VIEW)
Refer to the schematic diagram for the values of resistors and capacitors. 910

ABCDEFGHIJ
1
2
3
4
5
6
7
126
345
47K
47K
22K
10K
47K
22K
22K
47K
10K
47K
47K
47K
10K
47K
10K
22K
22K
47K
22K
47K
22K
22K
22K
22K
22K
47K
10K
22K
IC3
IC5
KRC-20S (1/2)
SYNTHESIZER UNIT (X14-6852-71)
IC4
IC2
IC1
A
ME1 (D40-1136-05)
0V
0V
5V
0V
5V
0V
5V
10.2V
5.0V
5.0V
5.0V
14.4V
14.2V 8.2V
0V 5V
5V
0V
0V 5V
5V 0V
0V
0V
5.0V
5V
0V
0V 5V
5V
13.6V
14.4V
14.4V
14.4V
13.6V
10.2V
0V
0V or 5.0V
5V
0V
5V 0V
0V
5.0V
0V
5.0V
0V
0V
0V
0V
1.3V
0.8V
3.5V
0V
8.2V
3.5V
0.8V
1.3V
0V
7.3V
4.9V
7.3V
14.4V
7.3V
0V
7.3V
7.3V
7.2V
7.2V
0V
7.2V
7.2V
7.3V
7.3V
0V
7.3V
14.4V
7.3V
3.3V
7.3V
0V
5V
0V
0V 5V
0V 5V
0V 5V
0V
5V
0V
5.0V
4.0V
4.0V
4.0V
4.0V
4.0V
4.0V
4.0V
4.0V
4.8V
4.0V
0V
5V
0V
5V
0V
8.2V
8.2V
8.2V
8.2V
8.2V
8.2V
8.2V
5.1V
3.4V
0V 4V
0V 4V
0V 5V
SW
ANT-CON.
A1
J2
D50
WH1
D261
D260
Q260
D52
D51
Q50
D370
4.7K
R350
Q350 P-CON.
Q351
D352
Q353
Q352
Q151
D151
D152 D150
Q150
Q201
D200
Q203
FM+B SW
J1
CN1
J3
Q320
Q55
Q54
D55
Q56
Q57
+B SW
Q301
Q53
Q52
Q51
D53
D54
Q58
Q60
Q61
Q59
D56
Q371
Q261
DRIVER
Q51,52
BACK-UP
5V AVR
BACK-UP DETECTION
(MOMENTARY POWER
DOWN DETECTION)
SW
COM
AMPLIFIER
EQUALIZER
IC1 :
IC2 : TDA7461ND
LC72366-9592
IC3 : HD74HC27FP
IC4 : TDA7384A
IC5 : LA3161
Q50,52,57,61 : 2SC2412K or
2SD601A
Q51,261 : 2SB1443
Q53 : DTA114YK or
UN2114 or
KRA107S
KRA103S
2SA2057 or
KRC104S
Q54,58 : DTC144EK or
UN2213 or
Q55,59,352 : DTA124EK or
UN2112 or
Q56,60 :
2SB1655(E,F)
2SB1565(E,F) or
2SB1548(P) or
Q201,203,350,370 : 2SB1277(Q,R)
Q301 : DTA144EK or
UN2113
Q320,351 : 2SA1037K
D50 : S2V20
∗
A or
1N5393G-M6
D51 : MA4068(N)-M or
D52 : MA4051-L
D53,260,261,350,351,370,371
: AM01Z or
ERA15-01 or
DSM1SD2
HZS7A3L
D54 : MA4056(N)-M
D55 : MA4091(N)-L
D56 : MA4110-L
D100,150-152,352: 1SS133
D200 : MA4051(N)-M
Q200 Q202
J1
X16-
2/2
D371
D351
Q370
D100
Q150,200,202 UN2212 or
KRC103S
KRC107S
DTC124EK or:
Q151,260,353,371 UN2214 or DTC114YK or:
HD1
S3
M
M1
S1 S2
ILLUMINATION
+B SW
ILLUMINATION
+B DRIVER
+B SW
MOTOR
POWER IC
P-CON.
SW
P-CON.
PROTECTION SW
Q352
P-CON.
PROTECTION
INHIBIT SW
P.ON
5V AVR
SYSTEM MI-COM
RESET
SVR DISCHARGE SW
MUTE
LOGIC
PANEL 5V
SW
COM+B
AVR
E-VOL. &
N.C. MPX
FM+B
SW
AM+B
SW
AM+B
SW
FRONT-END
ELECTRIC
VOLUME
MUTE SW
+B B LINE
GND LINE
SIGNAL LINE
BU
BU
BU
BU BU BU
BU
BUBU
BU
BU
BU
BU
BUBU
BU
BU
BUBU
BU
BUBUBU
+5V
+5V
+5V
P5V
+5V
+5V
+5V +5V
+5V
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B +B +B
+B
+B
+B
+B +B
+B
+B+B
+B +B
+B
P5VP5V
+5V+5V
+5VP5V
+5V+5V
+5V
P5V
+5V+5V P5V
P5VP5V
+5V+5V
+5V
L8 4.7uH
41
0.01
C321
0.01
C202
R129 22K
AM+B
19
23
20
21
22
AUDIO OUT
SD
S-METER
IF1+B
14
17
18 VDD 5V
IF2+B
15
16
SDA
SCL
DIG GND
10
11
12
13
OSC GND
VT
PLL+B
IFC OUT
7
8
9
OSC GND
OSC GND
OSC GND
FM ANT
3
4
5
6
AM ANT
OSC GND
FM+B
1
2RF GND
16 15 14 13 12 11 10 9
8765 432 1
FL+
RL+
FL-
RL-
FR-
RR-
FR+
RR+
P-ANT
P-CON
ACC
B.U
GND
19
23
17
21
9
3 7 5
17
23
21
19
L1
140uH
3300u16
C50
+
6
5
4
3
2
1
T.MUTE
GND
MOT GND
MOT +B
PACK IN
GND
10K
R261
1K
R260
43K
R57
0.01
C52
47K
R55
33K
R52
10K
R54
4.7K
R370
R351
1K
R352
3.3u25
C350
+
22K
C351
0.1u50
C352
+
R353
0.068
4.7K
R16
0.22u50
C18
0.22u50
C17 4.7K
R15
0.22u50
C15 4.7K
R13
0.22u50
C16 R14
4.7K
100u10
C159
+
+
C160
10u16
R152 1K
R151 4.7K
R153 91K
430
180K
C162 1u50
+
R157 100
R158 33K
R155
R156
22 23
24
25
0.01
C151
47u10
C150
+
L3 4.7uH
0.1
C506 4.7K
R150
0.1
C155
0.015
C153
0.22
C154
0.033
150P
C157
C156
0.22 0.22
1u50
C152
+
24 IF1 GND
IF2 GND
0.01
C200
W200
0.01
C201
22K
R203
22K
R201
1K
R202
1K
R200
R205
150
9
8
L9 4.7uH
63
10
C206 47u10
+
1
2
3
4
5
FWD/REV
GND
HEAD R
HEAD COM
HEAD L
0.047
C251 10K
R251
1500P
C2
1500P
C1
22K
R1 22K
R2
12 11 10 987654321
PAN SW
L DATA S
L CLK
L CE
L DATA L
u GND
PAN5V
RESET
ILL GND
LAMP +B
ESD GND
R322 2.2K
R301 1K R303 1K R305 1K R304 1K
27K 47K
R320R321
R324
100u16
C57
+
R62
100u10
C58
+
1K
R64
1K
R63
R65
2.2 1/2W
R66
2.2 1/2W
4.7K 2.7K
R207 R206
3
4
25 23
36 37
38
5
4 6
3
67
28
15
62
40
C56
100u6.3
+
10u10
R58
22K
100
R59
C55
+
C54
0.01
100u16
+
39
1K
R67
3 7 5
9
44
GND
7
R160 47K
6
5
4
3
C164
0.01
2
1
9
8
11
10
12
13
VDD 14
+
0.022
3
C7
120K
R7
100u10100
+
100P
C5
C9
R5 6.8K
R3
L IN 8
L NF
L OUT
7 6
C3
47u6.3
4
10
R250
120K
R8
C250
100u10
R6 6.8K
+
C8
0.022
C10
100u10
R4
100
GND
VCC
R OUT
5
4
100P
C6
R NF
3 2
+
+
C4
47u6.3
R IN 1
1/2W
16
7
24
22
C53
25
26
F1 (10A)
3.3K
R50
1/2W
61
R371
Q370,371
R373
1K
1K
R372
22K
40
1
2 3
4
5 6 7 8
9
10
11
12 13
14
15 16 17 18
19
20
21
22 23
24
25
TAB GND RR- STBY RR+ VCC FR- GND FR+ SVR FRI RRI GND FLI RLI AC GND RL+ GND RL- VCC FL+ MUTE FL- GND CD
R159 100K
28 27 26 25 24 23 22 21 20 19 18 17 16 15
AC OUT L
AC OUT R
CREF
OUT LF
OUT RF
OUT LR
OUT RR
VDD
GND
SDA
SCL
S MUTE
MUX R
MUX L
1
2 3
4
5 6 7 8
9
10
11
12 13
14
AC IN L AC IN R TAPE R TAPE L CDR CDRG CDL CDLG PHONE AM MPX LEVEL MP IN MP OUT
54
64
C13
C14
L4
52mH
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
65 66 67 68
69
70
71
72 73
74
75 76 77 78
79
80
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
ANT CON
P CON
AMP MUTE
AMP STBY
SVR
REQ H
CH CON
MUTE
REQ C
VDD
GND GND
FF/REW
PACK IN
FM+B
AM+B
SCL
MOTOR
CH CLK
DATA H
DATA C
SD
PLL CLK
PLL DATA
SDA
L CE
L CLK
L DATA S
L DATA L
GND
XIN
GND GND HOLD VDD GND GND VDD GND GND VSS GND XOUT
SW5V
ILL
BEEP
ROLL OFF
NOISE CANCELLER
SEL1
SEL2
SEL3
EQ MUTE
FWD/REV
REMO
ACC DET
B.U. DET
S METER
PANEL
R110 47K
R108 47K
38 37 36
27 28
26 25
27
R154 750 C161 1u50
+
61
62
41
44
R120 47K
R122 47K
54
64
67
X1
4.5MHz
C103
22P
C102
22P
6
4
3
5
9
10
7
8
R116 4.7K
R119 2.2K
R118 2.2K
1K
10
R306
1K
63
15
2
2
R131 10K
R114 22K
16
R106 1K
47K
47K
R127
R126
39
TH1
0.01
C101
47K
R125
R105
R132
100K
2.2M
R103
R138
22K
47K
R137
1K
R115
P1
47u6.3
C320
+
47
R323
1/2W
1/2W
1/2W
T.MUTE
GND
MOT GND
MOT+B
GND
PACK IN
Lch
12
FWD
REV
Rch
Ref.99
6
345
Q260,261
Q58,59
Q60,61
1K 1/2W
Q350
Q351
Q151
IC3
Q320
10K
Q54,55
IC2
Q150
(E30-4959)
DC CORD
ACC GND
B.U
P.CON
P CON
ANT CON
RED
BLU/WHT
BLU/WHT
WHT/BLK
GRY/BLK
FR-
FR+
FL-
GRY
FL+ WHT
2
4
3
RR-
RR+
RL-
RL+
GRN/BLK
VIOL/BLK
VIOL
6
5
7
GRN
8
BLK YEL
1
15
13
14
11
12
10
9
16
8
7
A31
24
5
6
7
8
B13
24
5
6
RL+
RR+
RR-
FR+
FL+
FR-
FL-
RL-
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, leak-
age-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.
!
2SB1565 DTA114EK
DTA114YK
DTA124EK
DTA144EK
DTC114YK
DTC124E
K
DTC144E
K
KRC103S
2SB1548 2SA1037K KRA102S
KRC104S LA31612SB1277 2SB1443

KLMNO
12
11
10
9
8
7
6
5
4
3
2
1
PANEL SW
L DATA S
L CLK
L CE
L DATA L
N.C.
u-GND
PAN 5V
RST
ILL-GND
ILL+B
ESD-GND
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
24
23
22
21
20
19
18
17
31
30
29
28
27
26
25
1
2 3
4
5 6 7 8
9
10
11
12 13
14
15 16
50
51
52
53
54
56
57
58
59
60
61
62
63
64
KS5
KS4
KS3
KS2
KS1
COM3 COM2
COM1
S40
S39
S38
S37
S36 S35
S34
S33
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
KEY S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16
KI1
KI2
KI3
KI4
KI5
VDD
VDD2
VDD1
VSS
OSC
DATA L
CE
CLK
DATA S
KI1
KI2
KI4
KI3
C4 0.047
C5 1000P
C1 0.047
R19 56K
C2 0.01
R8 4.7
R18 1K
63
64
62
61
62
61
63
R11 100
R13 100
R14 100
R12 100 64
25
12 13
14
15 16
26
27
28
29
30
31
32
18
19
20
21
22
23
24
17
CO3 CO2
CO1
37 36 35
34
33
PL1PL2 13
13
R21
R6
470
470
R5
330
R4
R3
330
R1
470
R2
330
KS1
KS2
KS3
KS4
KS5
KI4
KI3 KI2
KI1
29
28 27 26 25
24
23 22
21
20
19
18 17 16 15
14
13 12
11
10
9
8 7 6 5
4
3 2
1
S16 S15 S14 S13 S12 S37 S36 S35 S34 S33 S32 S31 S30 S29 S28 S27 S26 S25 S24 S23 S22 S21 S20 S19 S18 S17
COM1 COM2 COM3
17 18
19
20
21
22 23
24
25 26 27 28
29
30
31
32 33
34
35 36 37
12 13
14
15 16
R20
S2 S3
32
KS1
KS2 KS3
KS4
KS5
49
Q1
KS6
55 TEST
J1
Q1
2
1
CLK ATT
AM
6
5
VOL+
FMAUDIO
D17 :
D1-13,15
Q1 : UN2111 or
KRA102S
IC1 :
J3
X14-
1/2
AUTO VOL-
T.UP
43
T.DOWN
SRC
RST
∗D1
∗D4
∗D6
∗D5
∗D8∗D7
∗D9 ∗D11
∗D12 ∗D13
∗D14 ∗D15
∗D10
∗D2 ∗D3
D17
:
D14 :MA3062-M
DTA114EK or
LC75853NE ∗
∗
KEY-MATRIX
PERMISSION
SW
LCD DRIVER
WITH
KEY-MATRIX
CO3
CO2 CO1
ED1
IC1
SWITCH UNIT (X16-1492-7X)
KRC-20S (2/2)
A
10K
10K
0V 5V
5.0V
0V
0V
0V
3.3V
1.7V
5V
3.3V
0V
5V
0V
5V
1.7V
3.3V
5V
0V
0V
5V
0V
5V
5V
10.2V
5.0V
0V
+B
+B
+5V +5V +5V
+B B LINE
GND LINE
2-72
MODEL NAME
KRC-20SA (E)
UNIT No.
2-71
KRC-20SG (E)
(X16-1492-7X)
B30-1566-05
D1-13,15
B30-1565-05 B30-1511-05
D14
B30-2025-05
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.
!

KRC-20SA/G
EXPLODED VIEW (MECHANISM)
Parts with the exploded numbers larger than 700 are not supplied.
AB
1
2
3
31
54
4
99
101
115
53
111
102
102
12
103 111
31
33
14
102
114
52
39
10
40
34
58
57
39
9
35
112
113
7
626
25
HD1
56
100
106x2
37
36
38
M1 20
5
1
23
22
105x2 113
112
16
18
17
19 102
104
14

KRC-20SA/G
15
EXPLODED VIEW (UNIT)
Parts with the exploded numbers larger than 700 are not supplied.
CD
1
2
3
M3x4
φ3x5
φ3x10
φ3x8
φ3x20
φ2.6x6
M3x8
: N30-3004-46
: N83-3005-46
: N35-3010-46
: N80-3008-46
: N83-3020-46
: N86-2606-46
: N30-3008-46
A
B
C
D
E
F
K
B
B
B
B
(X14-)
Ax2
Ax2
737
K
K
Refer to the
following page.
ME1
A1 F1
244
211
DC1
242
206
201
221
766
216x2
(X14-)
J1 (X14-)
(X14-)
J5
(X14-)
J4
(X14-)
772
(X14-)
771
(X14-)
770
(X14-)
773
(X14-)
J2
(X14-)
L1
724
702
B
B
E
D
Cx2
Fx2
263

KRC-20SA/G
16
EXPLODED VIEW (PANEL)
Parts with the exploded numbers larger than 700 are not supplied.
EF
1
2
3
G
J
H
G
φ2x6
φ1.5
φ2x8 (BLK)
: N80-2006-46
: N29-0205-04
: N80-2008-45
G
H
J
Jx2
Jx2
203
228
218
219
229
217
704
767
(X16-)
(X16-)
(X16-)
277
(X16-)
278
(X16-)
279
(X16-)
ED1
(X16-)
276
780
207
230
241
253
709
249
222
205
PA1
250
246
252
251
254
248
251
255
227
227
227
247
226

KRC-20SA/G
17
PARTS LIST
∗New Parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
d
N
e
wParts No. Description
Dest
inati
on
KRC-20SA/G
201 1C A02-1486-13 PLASTIC CABINET ASSY
203 1F A22-2386-13 SUB PANEL ASSY
205 2F A46-1748-01 REAR COVER
206 1D A52-0756-02 TOP PLATE
207 1F A53-1638-13 CASSETTE LID
PA1 3E ∗A64-2519-02 PANEL ASSY
211 3C B07-2124-02 ESCUTCHEON
- B46-0100-50 WARRANTY CARD
- B46-0606-04 ID CARD
- B58-1365-04 CAUTION CARD
-∗B64-2206-00 INSTRUCTION MANUAL
216 1C D10-3031-04 LEVER
217 1F D10-4446-03 LEVER
218 1F D10-4447-03 LEVER
219 1F D21-2329-04 SHAFT
ME1 2C D40-1136-05 CASSETTE MECHANISM ASSY
221 2D E29-1585-04 LEAD PLATE
222 2F E29-1869-02 CONDUCTIVE RUBBER
DC1 1C E30-4959-05 DC CORD
F1 2D F52-0006-05 FUSE (MINI BLADE TYPE)
F1 2D F52-0011-05 FUSE (MINI BLADE TYPE)
226 1F G01-2525-04 TORSION COIL SPRING
227 3F G01-2793-14 COMPRESSION SPRING
228 1F G01-2987-04 TORSION COIL SPRING
229 1F G01-2988-04 EXTENSION SPRING
230 2F G01-2990-04 COMPRESSION SPRING
- H10-4685-12
POLYSTYRENE FOAMED FIXTURE
- H25-0337-04
PROTECTION BAG (180
×
300
×
0.03)
- H25-1111-04 PROTECTION BAG (280
×
450
×
0.03)
-∗H54-2238-03 ITEM CARTON CASE E8
-∗H54-2239-03 ITEM CARTON CASE E9
241 3E J19-5125-02 HOLDER
242 1C J21-9491-13 MOUNTING HARDWARE ASSY
244 3D J61-0307-05 WIRE BAND
246 3F K24-3545-04 KNOB (EJECT)
247 3F K24-3546-04 KNOB (FF)
248 3F K24-3547-04 KNOB (REW)
249 3E K24-3817-03 KNOB (SRC)
250 2E K24-3818-04 KNOB (REL)
251 3E K24-3819-04 KNOB (SEEK)
252 3E K25-1387-03 KNOB (AUTO)
253 3E K25-1388-03 KNOB (ATT)
254 3E K25-1389-03 KNOB (FM,AM)
255 3E K25-1390-03 KNOB (VOL)
A 3D N30-3004-46 PAN HEAD MACHINE SCREW
B 3D N83-3005-46 PAN HEAD TAPTITE SCREW
G 3E N80-2006-46 PAN HEAD TAPTITE SCREW
H 2F N29-0205-04 RETAINING RING (1.5)
J 2F N80-2008-45 PAN HEAD TAPTITE SCREW
K 1D N30-3008-46 PAN HEAD MACHINE SCREW
Ref. No. A
d
d
N
e
wParts No. Description
Dest
inati
on
263 1C T90-0523-05 ANTENNA ADAPTOR
C1,2 CK73GB1H152K CHIP C 1500PF K
C3,4 CE04CW0J470M ELECTRO 47UF 6.3WV
C5,6 CC73GCH1H101J CHIP C 100PF J
C7,8 CK73GB1E223K CHIP C 0.022UF K
C7,8 CK73GB1H223K CHIP C 0.022UF K
C9,10 CE04CW1A101M ELECTRO 100UF 10WV
C13,14 CK73GB1A224K CHIP C 0.22UF K
C15-18 C90-5296-05 NP-ELECT 0.22UF 50WV
C50 C90-5242-05 ELECTRO 3300UF 16WV
C52 CK73GB1H103K CHIP C 0.010UF K
C53 CE04CW1C101M ELECTRO 100UF 16WV
C54 CK73GB1H103K CHIP C 0.010UF K
C55 C90-2594-05 ELECTRO 10UF 10WV
C56 CE04CW0J101M ELECTRO 100UF 6.3WV
C57 CE04CW1C101M ELECTRO 100UF 16WV
C58 CE04CW1A101M ELECTRO 100UF 10WV
C101 CK73GB1H103K CHIP C 0.010UF K
C102,103 CC73GCH1H220J CHIP C 22PF J
C150 CE04CW1A470M ELECTRO 47UF 10WV
C151 CK73GB1H103K CHIP C 0.010UF K
C152 C90-2608-05 ELECTRO 1.0UF 50WV
C153 CK73GB1H153K CHIP C 0.015UF K
C154 CK73GB1A224K CHIP C 0.22UF K
C155 CK73GB1C104K CHIP C 0.10UF K
C156 CK73GB1E333K CHIP C 0.033UF K
C156 CK73GB1H333K CHIP C 0.033UF K
C157 CC73GCH1H151J CHIP C 150PF J
C159 CE04CW1A101M ELECTRO 100UF 10WV
C160 C90-2597-05 ELECTRO 10UF 16WV
C161 C90-2935-05 ELECTRO 1.0UF 50WV
C162 C90-2608-05 ELECTRO 1.0UF 50WV
C164 CK73GB1H103K CHIP C 0.010UF K
C200-202 CK73GB1H103K CHIP C 0.010UF K
C206 CE04DW1A470M ELECTRO 47UF 10WV
C250 CE04CW1A101M ELECTRO 100UF 10WV
C251 CK73GB1E473K CHIP C 0.047UF K
C320 CE04CW0J470M ELECTRO 47UF 6.3WV
C321 CK73GB1H103K CHIP C 0.010UF K
C350 C90-2598-05 ELECTRO 3.3UF 25WV
C351 CK73GB1C683K CHIP C 0.068UF K
C352 C90-2602-05 ELECTRO 0.10UF 50WV
C506 CK73GB1C104K CHIP C 0.10UF K
CN1 E40-3240-05 PIN ASSY
J1 E04-0312-05 RF COAXIAL CABLE RECEPTACLE
J2 E58-0863-15 RECTANGULAR RECEPTACLE
J3 E58-0888-05 RECTANGULAR RECEPTACLE
P1 E23-0745-05 TERMINAL
WH1 E39-0344-05 WIRING HARNESS
L1 L33-1063-15 CHOKE COIL
L3 L40-4795-91 SMALL FIXED INDUCTOR (4.7UH,J)
L4 L33-1123-05 LINE FILTER COIL
!
!
!
SYNTHESIZER UNIT (X14-6852-71)
indicates safety critical components.
!
E8 : KRC-20SA E9 : KRC-20SG

KRC-20SA/G
18
PARTS LIST
Dest
inati
on
∗New Parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
d
N
e
wParts No. Description
Dest
inati
on
L8,9 L40-4795-91 SMALL FIXED INDUCTOR (4.7UH,J)
X1 L77-1163-05 CRYSTAL RESONATOR (4.5M)
X1 L77-1165-05 CRYSTAL RESONATOR (4.5MHZ)
B 1D N83-3005-46 PAN HEAD TAPTITE SCREW
C 1D N35-3010-46 BINDING HEAD MACHINE SCREW
E 1D N83-3020-46 PAN HEAD TAPTITE SCREW
F 2D N86-2606-46 BINDING HEAD TAPTITE SCREW
R1,2 RK73GB2A223J CHIP R 22K J 1/10W
R3,4 RK73GB2A101J CHIP R 100 J 1/10W
R5,6 RK73GB2A682J CHIP R 6.8K J 1/10W
R7,8 RK73GB2A124J CHIP R 120K J 1/10W
R13 RK73EB2E472J CHIP R 4.7K J 1/4W
R14,15 RK73GB2A472J CHIP R 4.7K J 1/10W
R16 RK73EB2E472J CHIP R 4.7K J 1/4W
R50 RD14DB2H332J SMALL-RD 3.3K J 1/2W
R52 RK73FB2B333J CHIP R 33K J 1/8W
R54 RK73FB2B103J CHIP R 10K J 1/8W
R57 RK73GB2A433J CHIP R 43K J 1/10W
R58 RK73FB2B223J CHIP R 22K J 1/8W
R59 RK73GB2A101J CHIP R 100 J 1/10W
R62 RK73GB2A103J CHIP R 10K J 1/10W
R63,64 RK73GB2A102J CHIP R 1.0K J 1/10W
R65,66 RD14DB2H2R2J SMALL-RD 2.2 J 1/2W
R103 RK73GB2A225J CHIP R 2.2M J 1/10W
R105,106 RK73GB2A102J CHIP R 1.0K J 1/10W
R108 RK73GB2A473J CHIP R 47K J 1/10W
R110 RK73GB2A473J CHIP R 47K J 1/10W
R114 RK73EB2E223J CHIP R 22K J 1/4W
R115 RK73GB2A102J CHIP R 1.0K J 1/10W
R118,119 RK73GB2A222J CHIP R 2.2K J 1/10W
R120 RK73GB2A473J CHIP R 47K J 1/10W
R122 RK73GB2A473J CHIP R 47K J 1/10W
R125 RK73GB2A473J CHIP R 47K J 1/10W
R126,127 RK73EB2E473J CHIP R 47K J 1/4W
R129 RK73GB2A223J CHIP R 22K J 1/10W
R131 RK73GB2A103J CHIP R 10K J 1/10W
R137 RK73GB2A473J CHIP R 47K J 1/10W
R150,151 RK73GB2A472J CHIP R 4.7K J 1/10W
R152 RK73FB2B102J CHIP R 1.0K J 1/8W
R153 RK73GB2A913J CHIP R 91K J 1/10W
R154 RK73GB2A751J CHIP R 750 J 1/10W
R155 RK73GB2A431J CHIP R 430 J 1/10W
R156 RK73GB2A184J CHIP R 180K J 1/10W
R157 RK73EB2E101J CHIP R 100 J 1/4W
R158 RK73GB2A333J CHIP R 33K J 1/10W
R159 RK73GB2A104J CHIP R 100K J 1/10W
R160 RK73GB2A473J CHIP R 47K J 1/10W
R200 RK73EB2E102J CHIP R 1.0K J 1/4W
R201 RK73EB2E223J CHIP R 22K J 1/4W
R203 RK73EB2E223J CHIP R 22K J 1/4W
R205 RK73EB2E151J CHIP R 150 J 1/4W
R206 RK73GB2A472J CHIP R 4.7K J 1/10W
R207 RK73GB2A272J CHIP R 2.7K J 1/10W
R250 RK73FB2B100J CHIP R 10 J 1/8W
Ref. No. A
d
d
N
e
wParts No. Description
R251 RK73GB2A103J CHIP R 10K J 1/10W
R260 RD14DB2H102J SMALL-RD 1.0K J 1/2W
R301 RK73EB2E102J CHIP R 1.0K J 1/4W
R303-306 RK73EB2E102J CHIP R 1.0K J 1/4W
R320 RK73GB2A473J CHIP R 47K J 1/10W
R321 RK73EB2E273J CHIP R 27K J 1/4W
R322 RK73EB2E222J CHIP R 2.2K J 1/4W
R323 RK73EB2E470J CHIP R 47 J 1/4W
R324 RK73EB2E100J CHIP R 10 J 1/4W
R351 RD14DB2H102J SMALL-RD 1.0K J 1/2W
R352 RK73FB2B223J CHIP R 22K J 1/8W
R353 RD14DB2H102J SMALL-RD 1.0K J 1/2W
R371 RD14DB2H102J SMALL-RD 1.0K J 1/2W
R372 RK73FB2B223J CHIP R 22K J 1/8W
R373 RD14DB2H102J SMALL-RD 1.0K J 1/2W
W111-114 R92-2053-05 CHIP R 0 J 1/8W
W116 R92-2052-05 CHIP R 0 OHM J 1/10W
W117 R92-2053-05 CHIP R 0 J 1/8W
W118 R92-2052-05 CHIP R 0 OHM J 1/10W
W119 R92-2053-05 CHIP R 0 J 1/8W
W120,121 R92-2052-05 CHIP R 0 OHM J 1/10W
W122 R92-2053-05 CHIP R 0 J 1/8W
W123 R92-2052-05 CHIP R 0 OHM J 1/10W
W127-133 R92-2053-05 CHIP R 0 J 1/8W
W134 R92-2052-05 CHIP R 0 OHM J 1/10W
W135 R92-2053-05 CHIP R 0 J 1/8W
D50 S2V20∗A DIODE
D50 ∗1N5393G-M6 DIODE
D51 HZS7A3L ZENER DIODE
D51 MA4068(N)-M ZENER DIODE
D52 MA4051-L ZENER DIODE
D53 AM01Z DIODE
D53 DSM1SD2 DIODE
D53 ERA15-01 DIODE
D54 MA4056(N)-M ZENER DIODE
D55 MA4091(N)-L ZENER DIODE
D56 MA4110-L ZENER DIODE
D100 1SS133 DIODE
D150-152 1SS133 DIODE
D200 MA4051(N)-M ZENER DIODE
D260,261 AM01Z DIODE
D260,261 DSM1SD2 DIODE
D260,261 ERA15-01 DIODE
D351 AM01Z DIODE
D351 DSM1SD2 DIODE
D351 ERA15-01 DIODE
D352 1SS133 DIODE
D370,371 AM01Z DIODE
D370,371 DSM1SD2 DIODE
D370,371 ERA15-01 DIODE
IC1 LC72366-9592 MI-COM IC
IC2 TDA7461ND ANALOGUE IC
IC3 HD74HC27FP MOS-IC
IC4 TDA7384A ANALOGUE IC
SYNTHESIZER UNIT (X14-6852-71)
indicates safety critical components.
!
E8 : KRC-20SA E9 : KRC-20SG

KRC-20SA/G
19
PARTS LIST
Q351 2SA1037K TRANSISTOR
Q352 DTA124EK DIGITAL TRANSISTOR
Q352 KRA103S DIGITAL TRANSISTOR
Q352 UN2112 DIGITAL TRANSISTOR
Q353 DTC114YK DIGITAL TRANSISTOR
Q353 KRC107S DIGITAL TRANSISTOR
Q353 UN2214 DIGITAL TRANSISTOR
Q370 2SB1277(Q,R) TRANSISTOR
Q371 DTC114YK DIGITAL TRANSISTOR
Q371 KRC107S DIGITAL TRANSISTOR
Q371 UN2214 DIGITAL TRANSISTOR
TH1 PTH9C42BD471Q POSITIVE RESISTOR
A1 X86-3320-11 TUNER UNIT
276 2E ∗B11-1376-04 OPTICAL DIFFUSER
277 2E B11-0992-04 REFLECTION SHEET
278 2E B19-2019-03 LIGHTING BOARD
D1-13 B30-1565-05 LED (1608,PG) E9
D1-13 B30-1566-05 LED (1608,RED) E8
D14 B30-1511-05 LED (1,RED) E8
D14 B30-2025-05 LED E9
D15 B30-1565-05 LED (1608,PG) E9
D15 B30-1566-05 LED (1608,RED) E8
ED1 2E B38-1022-05 LIQUID CRYSTAL
PL1,2 B30-1483-05 LAMP (5.5V 0.125A)
C1 CK73GB1E473K CHIP C 0.047UF K
C1 CK73GB1H473K CHIP C 0.047UF K
C2 CK73GB1H103K CHIP C 0.010UF K
C4 CK73GB1E473K CHIP C 0.047UF K
C4 CK73GB1H473K CHIP C 0.047UF K
C5 CK73GB1H102K CHIP C 1000PF K
279 2E E29-1600-04 CONDUCTIVE RUBBER
J1 E59-0831-05 RECTANGULAR PLUG
R1 RK73EB2E331J CHIP R 330 J 1/4W
R2 RK73EB2E471J CHIP R 470 J 1/4W
R3,4 RK73EB2E331J CHIP R 330 J 1/4W
R5,6 RK73EB2E471J CHIP R 470 J 1/4W
R8 RK73GB2A4R7J CHIP R 4.7 J 1/10W
R11-14 RK73GB2A101J CHIP R 100 J 1/10W
R18 RK73GB2A102J CHIP R 1.0K J 1/10W
R19 RK73GB2A563J CHIP R 56K J 1/10W
R20,21 RK73EB2E130J CHIP R 13 J 1/4W
D17 MA3062-M ZENER DIODE
IC1 LC75853NE MOS-IC
Q1 DTA114EK DIGITAL TRANSISTOR
Q1 KRA102S DIGITAL TRANSISTOR
Q1 UN2111 DIGITAL TRANSISTOR
1 2A A10-4328-08 CHASISS CALKING ASSY
4 3B J26-4017-08 PRINTED WIRING BOARD ASSY
5 2A J21-7778-08 MOUNTING HARDWARE
6 2B D10-4091-08 SLIDER
Dest
inati
on
∗New Parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
d
N
e
wParts No. Description
Dest
inati
on
IC5 LA3161 IC (PREAMP×2)
Q50 2SC2412K TRANSISTOR
Q50 2SD601A TRANSISTOR
Q51 2SB1443 TRANSISTOR
Q52 2SC2412K TRANSISTOR
Q52 2SD601A TRANSISTOR
Q53 DTA114YK DIGITAL TRANSISTOR
Q53 KRA107S DIGITAL TRANSISTOR
Q53 UN2114 DIGITAL TRANSISTOR
Q54 DTC144EK DIGITAL TRANSISTOR
Q54 KRC104S DIGITAL TRANSISTOR
Q54 UN2213 DIGITAL TRANSISTOR
Q55 DTA124EK DIGITAL TRANSISTOR
Q55 KRA103S DIGITAL TRANSISTOR
Q55 UN2112 DIGITAL TRANSISTOR
Q56 2SA2057 TRANSISTOR
Q56 2SB1548(P) TRANSISTOR
Q56 2SB1565(E,F) TRANSISTOR
Q56 2SB1655(E,F) TRANSISTOR
Q57 2SC2412K TRANSISTOR
Q57 2SD601A TRANSISTOR
Q58 DTC144EK DIGITAL TRANSISTOR
Q58 KRC104S DIGITAL TRANSISTOR
Q58 UN2213 DIGITAL TRANSISTOR
Q59 DTA124EK DIGITAL TRANSISTOR
Q59 KRA103S DIGITAL TRANSISTOR
Q59 UN2112 DIGITAL TRANSISTOR
Q60 2SA2057 TRANSISTOR
Q60 2SB1548(P) TRANSISTOR
Q60 2SB1565(E,F) TRANSISTOR
Q60 2SB1655(E,F) TRANSISTOR
Q61 2SC2412K TRANSISTOR
Q61 2SD601A TRANSISTOR
Q150 DTC124EK DIGITAL TRANSISTOR
Q150 KRC103S DIGITAL TRANSISTOR
Q150 UN2212 DIGITAL TRANSISTOR
Q151 DTC114YK DIGITAL TRANSISTOR
Q151 KRC107S DIGITAL TRANSISTOR
Q151 UN2214 DIGITAL TRANSISTOR
Q200 DTC124EK DIGITAL TRANSISTOR
Q200 KRC103S DIGITAL TRANSISTOR
Q200 UN2212 DIGITAL TRANSISTOR
Q201 2SB1277(Q,R) TRANSISTOR
Q202 DTC124EK DIGITAL TRANSISTOR
Q202 KRC103S DIGITAL TRANSISTOR
Q202 UN2212 DIGITAL TRANSISTOR
Q203 2SB1277(Q,R) TRANSISTOR
Q260 DTC114YK DIGITAL TRANSISTOR
Q260 KRC107S DIGITAL TRANSISTOR
Q260 UN2214 DIGITAL TRANSISTOR
Q261 2SB1443 TRANSISTOR
Q301 DTA144EK DIGITAL TRANSISTOR
Q301 UN2113 DIGITAL TRANSISTOR
Q320 2SA1037K TRANSISTOR
Q350 2SB1277(Q,R) TRANSISTOR
Ref. No. A
d
d
N
e
wParts No. Description
indicates safety critical components.
!
SYNTHESIZER UNIT (X14-6852-71)
E8 : KRC-20SA E9 : KRC-20SG
SWITCH UNIT (X16-1492-XX)
CASSETTE MECHANISM ASSY (D40-1136-05)

KRC-20SA/G
PARTS LIST / SPECIFICATIONS
KENWOOD follows a policy of continuous advancements in development.
For this reason specifications may be changed without notice.
FM Section
Frequency Range ........................... 87.5MHz~108.0MHz
Frequency step ..................................................... 50kHz
Channel Space Selection ............................. 50k/200kHz
Usable Sensitivity (S/N : 30dB) ....... 9.3dBf (0.8µV/75Ω)
Quieting Sensitivity (S/N : 50dB) ... 15.2dBf (1.6µV/75Ω)
Frequency Response (±3.0dB) ................... 30Hz~15kHz
S/N (dB) .................................................... 70dB (MONO)
Selectivity ........................................... ≥80dB (±400kHz)
Stereo Separation ....................................... 40dB (1kHz)
AM Section
Frequency Range ............................... 531kHz~1611kHz
Frequency step ....................................................... 9kHz
Channel Space Selection ................................. 9k/10kHz
Usable Sensitivity (S/N : 20dB) ................. 28dBµ(25µV)
Cassette Section
Tape Speed .................................................. 4.76cm/sec
Wow & Flutter ......................................... 0.12% (WRMS)
FREQ. Response (Hz) (±3.0dB) .... 30Hz~14kHz (120µs)
Separation ................................................... 40dB (1kHz)
S/N (dB) .................................................................. 52dB
AMP Section
Maximum Power ................................................ 40W ×4
PWR DIN45324, +B=14.4V ................................ 26W ×4
Tone Section
Bass ............................................................ 100Hz±10dB
Treble .......................................................... 10kHz±10dB
General
Operating Voltage .................. 14.4V (11~16V allowable)
Current Consumption ................................................ 10A
Installation Size (W) × (H) × (D) ..... 182 × 53 × 158 (mm)
Weight ................................................................... 1300g
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501 Japan
∗New Parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
d
N
e
wParts No. Description
Dest
inati
on
7 2B D13-1323-08 GEAR
9 2B D10-4200-08 ARM ASSY (F)
10 2A D10-4201-08 ARM ASSY (R)
12 3A A11-0930-08 SUB CHASSIS CALKING ASSY
14 3A J26-4018-08 PRINTED WIRING BOARD ASSY
16 1B G01-2826-08 TORSION COIL SPRING
17 1A D10-4094-08 SLIDER
18 1B D10-4095-08 SLIDER
19 1A D10-4096-08 ARM
20 1A J19-4736-08 HOLDER ASSY
22 2A G01-2827-08 TENSION COIL SPRING
23 2A D10-4097-08 LEVER
25 2B D10-4098-08 SLIDER
26 2B G09-2019-08 SPRING
31 3A D01-0608-08 FLYWHEEL ASSY
33 3A G01-2828-08 TENSION COIL SPRING
34 2B G01-2829-08 TENSION COIL SPRING
35 2B D10-4099-08 ARM
36 1A D10-4100-08 ARM
37 1A D14-0682-08 ROLLER
38 1A D10-4101-08 LEVER
39 2A G01-2830-08 COMPRESSION COIL SPRING
40 2A D10-4102-08 ARM
52 2A D13-1110-08 GEAR
53 2B D15-0909-08 PULLEY
54 3B D16-0606-08 BELT
56 1B D10-4105-08 ARM ASSY
57 2B D10-4104-08 ARM
58 2B G01-2831-08 TENSION COIL SPRING
99 3B E39-0181-08 WIRE HARNESS
100 1B J11-0618-08 CLAMPER
101 3B N09-4328-08 SCREW
102 3A N09-4326-08 SCREW
103 3A N09-4191-08 SCREW
104 1B N09-4192-08 SCREW
105 2A N09-4058-08 SCREW
106 1A N09-4109-08 SCREW
111 3A N19-2082-08 FLAT WASHER
112 2A N19-2083-08 FLAT WASHER
113 2A N19-2084-08 FLAT WASHER
114 3A N19-2043-08 FLAT WASHER
115 2B N19-2038-08 FLAT WASHER
HD1 1B T31-0229-08 PLAYBACK HEAD
M1 1A T42-1025-08 MOTOR ASSY
E8 : KRC-20SA
E9 : KRC-20SG
indicates safety critical components.
!
CASSETTE MECHANISM ASSY
SPECIFICATIONS