Kenwood KRC-391 User manual

©2001-10 PRINTED IN JAPAN
B51-7853-00 (S) 1929
SERVICEMANUAL
CASSETTE RECEIVER
KRC-391/391Y
KRC-36/36Y/30Y
LOUD SCRL SCAN REP T.CALL M.RDMB.S/RDM MENU TI VOL ADJCLK
KRC-391
SRC
OFF
45Wx4
AUD
DISC
∗Front glass
(B10-4127-01)
Knob(1-6)
(K25-1392-03)
Knob(SRC)
(K24-3820-04)
Knob(FM,AM)
(K25-1393-03)
Knob(VOL)
(K25-1395-03) Cassette lid (A53-1687-03)
∗Panel assy
(A64-2538-02)
●KRC-391
Knob(AUD)
(K24-3821-04)
Mounting hardware assy
(J21-9641-13)
Antenna adaptor
(T90-0523-05)
Lever
(D10-4589-04) DC cord (E30-4792-05)
Plastic cabinet assy
(A02-1486-13)
MECHANISM EXTENSION CORD
W05-0477-00 (7P)
W05-0609-00 (10P)
∗Refer to the PARTS LIST

KRC-391/Y,36/Y,30Y
2
BLOCK DIAGRAM
FM ANT
AM ANT
RF GND
FM+B
AM+B
AM LO/DX
FM LO/DX
IF SELECT
RDS OUT
FM SD OUT
REQUEST
K2I-VTH
VCO-GND
FSD OUT
FM DET OUT
AM DET OUT
IF GND
COMMON+B
P-ON 5V
DIG GND
PLL DATA
PLL CLK
PLL CE
HI UP ADJ
FM+B
AM+B
A8V
SW5V
LO/DX
SD
S-METER
PLL-DATA
PLL-CE
SW5V
ACC-DET
BU-DET
SCL
MUTE
SDA
EN1
EN2
EN3
PANEL
RESET
DSI
CH MUTE
NOISE
DATA H
DATA C
REQ H REQ C
CH RST
CH CON
CH CLK
Rch
COM
Lch TAPE L/R
MP IN
AFS
QUAL
AM
MPX
OUT RR
OUT LR
OUT RF
LEVEL
SCL
SW5V
SDA
SCL
SDA
OUT LF
STBY
MUTE
SMUTE
5
10
BU5V
AFS
R QUAL
R CLK
R DATA
BU5V
REMO
SW5V
GREEN
RED
BU5V
PHONE
BEEP
SVR
P-MUTE
P-STBY
SVR
AC GND(BEEP)
TAPE L/R
PLL-CLK
SW5V
L-RES
L-CLK
L-DATA S
L-DATA L
MUSIC
EQ-MUTE
MS-CONT
MUSIC
EQ-MUTE
MS-CONT
FWD/REV
PACK IN
M-STBY
T-MODE
T-END
L-CE
340mV
SUB+
SUB-
Rch
Lch
PACK
T-END
M-STBY
T-MODE
FWD
REV
AUDIO
8V
MOTOR
BU14V
SW5V
IN
PLAY HEAD
SW5V
BU14V
BU5V
BU14V
EN1
EN2
EN3
P,CON
ILLUM
B.U.5V
AM+B
AUDIO
FM+BFM+B
AM+B
AUDIO 8V
AUDIO 8V
AUDIO 8V
BU5V
SW5V
TAPE
CD-CH
AM
FM
: 1719mV
: 3424mV
: 550mV
: 1727mV
TAPE
CD-CH
AM
FM
: 1786mV
: 3546mV
: 850mV
: 1345mV
AM : 160mV
FM : 213mV
CD L/R
1200mV BU14V CD L/R
8
RDS
ANT.
DECODER
SYSTEM u-COM
KEY
PAN 5V
MUTE
E2PROM
EQ AMP
CD ISO AMP
E-VOL
LCD DRIVER
LCD
DSI
REMO RST SWPAN IN SW
GREEN
RED or
RST IC
TEL DET TEL MUTE
DRIVER
MAIN
SUB
AVR
SW5
B.U. DET
SURGE-DET
B.U.
ACC
P-CONT
DC CONNECTOR
REGULATOR
ACC DET
J2
VOLTAGE
MUTE
PRE
R-Lch
R-Rch
AMP
SVR
MUTE
THERMO
PROTECTION
FRONT Lch
FRONT Rch
REAR Lch
REAR Rch
IC4
J4
POWER IC
TDA7386
CD/MD
CHANGER
SP OUT
J5
PRE OUT
IC10
SUB MOTOR
DRIVER
MOTOR
DRIVER
IC1
IC2
IC12
IC9
IC2
IC1
IC11
IC7
IC8
Q2,3
IC6
TUNER
(X16)
(X14)
MM
TAPE MECHA

KRC-391/Y,36/Y,30Y
3
COMPONENT DESCRIPTION
●SWITCH UNIT(X16-1532/1722-XX)
REF.No. FUNCTION OPERATION
IC1 LCD DRIVER
IC2 REMOTE SENSOR
Q1 KEY SCAN SW Receives key signal when the base terminal voltage becomes "L".
Q2 KEY ILLUMINATION SW Key illumination color becomes green when the base terminal voltage becomes "H".
Q3 KEY ILLUMINATION SW Key illumination color becomes red when the base terminal voltage becomes "H".
●SYNTHESIZER UNIT(X14-6892/9002-XX)
REF.No. FUNCTION OPERATION
IC1 SYSTEM µ-COM
IC2 E-VOLUME
IC4 POWER AMPLIFIER Speaker output
IC6 RDS DECODER
IC7 POWER IC
IC8 MUTE CONTROL LOGIC 3 input NOR gate x 3
IC9 EQUALIZER AMPLIFIER For full logical cassette mechanism control
IC10 SUB MOTOR DRIVER For full logical cassette mechanism sub motor driver
IC11 RESET IC Detection voltage below 3.0V
IC12 EEPROM
Q1 P.CON.DETECTION Detects P.CON voltage.
Q10 BACK-UP DETECTION Detects the back-up voltage.
Q11 SERGE DETECTION Detects serge voltage.
Q20 ACC DETECTION Detects ACC voltage.
Q40 PREOUT MUTE DRIVER Mutes when the base terminal voltage level becomes "L".
Q50 5V SW Works when the base terminal voltage level becomes "L".
Q101 DSI SW LED for DSI works when the base terminal voltage level becomes "H".
Q151 PANEL 5V SW Works when the base terminal voltage level becomes "L". Supplies VDD to panel.
Q201 NOISE DETECTION Detects noise.
Q221-224 PREOUT MUTE Mutes when the base terminal voltage level becomes "H".
Q251 POWER IC SVR SW Discharges the capacitor's voltage of SVR terminal after the base terminal voltage
becomes "H".
Q301 LOCAL SEEK SW Changes to the local seeking after the base terminal voltage becomes "H".
Q501 MOTOR DRIVER AVR Works when the base terminal voltage becomes "H". Supplies the power to the motor
driver.
Q551 MAIN MOTOR SW Works when the base terminal voltage becomes "L".
Q552 MAIN MOTOR SW Works when the base terminal voltage becomes "H".

KRC-391/Y,36/Y,30Y
4
MICROCOMPUTER'S TERMINAL DESCRIPTION
●(X14-) IC1: µ-COM
PORT No. PORT NAME I/O FUNCTION OPERATING CONDITION
1 DSI O DSI control.
2 PANEL I Panel detection. "L": Panel exists.
3- --
4 AVSS - GND.
5 L-RST O LCD driver reset.
6 L-CE O LCD driver chip enable.
7 AVREF1 I Reference voltage
8- --
9 PLL-DATA I/O Front-end communication data.
10 PLL-CLK O Front-end communication clock.
11 L-DATA L I LCD driver communication data.
12 L-DATA S O LCD driver communication data.
13 L-CLK O LCD driver communication clock.
14 R-DATA I RDS data.
15 R-QUAL I RDS QUAL.
16 CH-DATA C I Changer communication data.
17 CH-DATA H O Changer communication data.
18 CH-CLK I/O Changer communication clock.
19 M-STBY I Cassette tape stand-by detection. "H": Stand-by.
20 T-END I Tape end detection. "H": Run. "L": Stop.
21 ACC-DET I ACC detection.
22 BU-DET I Back-up detection.
23 IC2 TYPE 0 I For service. "L": Normally.
24 IC2 TYPE 1 I For service. "L": Normally.
25 TYPE 0 I Destination discrimination.
26 TYPE 1 I Destination discrimination.
27 TYPE REF O Reference voltage for destination and service.
28 MOTOR O Cassette mechanism motor. "H": ON. "L": OFF.
29 PLL-CE O Front-end communication chip enable.
30 SD I Station detection. "H": Station exists. "L": Station does not exist.
31 ASF O Noise detection time constant switch.
32 LO/DX O Local seeking switch. "H": LO. "L": DX.
33 VSS1 - GND.
34 P-MUTE O Power amplifier muting.
35 SVR O SVR control.
36 - - -
37 IC2-SCL O E-volume communication clock.
38 IC2-SDA I/O E-volume communication data.
39 MUTE O Muting control.
40 P-STBY O Power amplifier stand-by.
41 P.CON-DET I P.CON short-circuited detection.
42 CH-CONT O Changer control.
43 - - -
44 CH-REC H O Changer request.
45-47 - - -
48 EN2-1 O Power supply IC control.
49 EN2-0 O Power supply IC control.
50 BEEP O Buzzer.
51 EN3 O Power supply IC control.
52 EN1 O Power supply IC control.
53 SW 5V O P.ON 5V control. "H": OFF. "L": ON.
54 MUSIC I Tape signal detection. "H": Signal does not exist. "L": Signal exist.
55 MS-CONT O Tape advanced sensitivity control. "H": Play. "L": FF/REW.
56 EQ-MUTE O Cassette tape muting. "H": ON. "L": OFF.

KRC-391/Y,36/Y,30Y
5
KRC-391/Y,36/Y,30Y
6
MICROCOMPUTER'S TERMINAL DESCRIPTION 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 should not released in conditions
of ACC OFF, power OFF, momentary power down or
the panel off.
3. Test mode
• Blanking Skip (B.S) OFF.
• Eject a tape by pressing "ATT" key.
4. Audio adjustment
• Enter the audio mode by pressing the "AUD" key or
"OPEN/CLOSE" key on the remote controller.
• Set the volume level to be -10dB. In that case, "30" should
be shown on the display.
• Loudness OFF.
• The BASS/MIDDLE/TREBLE and BALANCE/FADER
can be adjusted to the full-boost/full-cut and full-front/
full-rear each by pressing the "UP" and "DOWN" keys.
5. Menu mode
• Enter the menu mode by pressing "CLK" key or "DNPP"
key on the remote controller.
• Only on models with RDS function, Local Seeking should
be first menu.
No. ITEM INPUT OUTPUT RECEIVER ALIGNMENT ALIGN FOR FIG.
SETTINGS SETTINGS SETTINGS POINTS
CASSETTE DECK SECTION Head azimuth Adjust so that output
1 AZIMUTH TCC-153 SP OUT TAPE PLAY screw level in playing "FWD" (b)
10kHz (FWD/REV) and "REV" becomes
(ME1) maximum each.
ADJUSTMENT
BALANCE/FADER/BASS/TREBLE : CENTER
T.ADV/METAL/DOLBY NR/AUTO : OFF
(b) AZIMUTH
PANEL FRONT
FWD REV
TESTMODE
PORT No. PORT NAME I/O FUNCTION OPERATING CONDITION
57 FWD/REV I Cassette tape running direction detection. "H": FWD "L": REV.
58 SUB+ O Sub motor control.
59 SUB- O Sub motor control.
60 RESET I System reset.
61 REMOTE I Remote control.
62 R-CLK I RDS clock.
63 CH-REQ C I Changer request.
64 PACK-IN I Cassette tape pack-in detection.
65 KEY-REQ I Key signal detection.
66 - - -
67 VSS0 - GND.
68 VDD1 - VDD.
69 X2 - Main system clock.
70 X1 I Main system clock.
71 IC - -
72 - - -
73 XT1 - VDD.
74 VDD0 - VDD.
75 AVREF 0 I Reference voltage.
76 S-METER I SD detection. "H": SD exists. "L": SD does not exist.
77 T-MODE I Cassette tape mode detection.
78 PHONE I Navi mute: Over 2.5V. Tel mute: less than 2.5V.
79 NOISE I Noise detection during FM mode.
80 AV CONT O Reference voltage.

ABCDEFG IH
1
2
3
4
5
6
7
J4
CN1
D401
D402
D404
D403
D409
D411
D410
DET.
ACC
D10
D11
Q11Q10
DET.
SERGE
DET.
BACK-UP
Q40
Q501
EQUALIZER
AMPLIFIER
SUB MOTOR
DRIVER
Q552
Q551
E-VOLUME
CN2
MOTOR
D551
AVR
MOTOR DRIVER
HEADRch
Lch
MAIN
T-END
STBY
SUB
PACK
FWD/REV
M
HD1
M
M1M2
PLAY
IC1 :
IC2 : TDA7407D
IC4 :
IC6 : TDA7479D
IC9 : HA12221F
IC7 : TDA3682ST
IC8 : HD74HC27FP
Q1,301 : DTC124EUA or
Q10,11,20,101,201
2SD1819A
Q40 : DTA124EUA or
Q50 : 2SA1036K
Q223,224 : DTC143TUA or
Q251 : DTC114YUA or
Q501 : 2SD1760
Q551 : 2SB1443
Q552 : DTC114EUA or
D1 : S2V20 A
D2,3 : 1GWJ43 (TPB5)
D4,551 : AM01Z or
D10,11,401,402
: MA4068 (N) -M
D20 : MA4051 (N) -M
D40,101,251-253
: B30-1567-05
403,404,407,409-411
: 1SS133
MUTE DRIVER
PREOUT
J2
D40
D20
Q20
D1
D2
D3D4
D30
Q201 DETECTION
NOISE
B
DRIVE
MUTE
IC12
IC10
IC11 LB1930M S-80835ANNP
: BR24C01AF
:
:
Q151 DTA114YUA or:
MA4047-M or:D30
D102
MA4062-L or:
D153,154,157,159-161,
B-PART
A-PART
TDA7386
2SC4081 or:
UN5112
UN5114
UN5216
UN5214
UN5211
1N5393G-M6 or
ERA15-01
HZS5B1
HZS6C1
D407
TEL
MUTE
B LINE
GND LINE
SIGNAL LINE
(X14-689X-XX)
CB
UN5212
CH-IN
DC-IN/SP-OUT
22K
22K
10K
10K
3.6V
0V
0V
5V
0V
8.3V
4.1V
4.1V
4.1V
4.1V
0V
0V
4.1V
4.1V
4.1V
4.1V
4.1V
4.2V
3.8V
3.8V
3.8V
3.8V
0V
5V
5V
0V
5V
1V 8.0V
4.0V
4.0V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
0V
3.8V
7.7V
5.0V
5.0V
0V 0V
7.6V
7.6V
0V
5V
0V
5V
0V
0V
5V
0V
5V
5V
0V
5.0V
0V 4.1V
4.9V
0V 5.0V 2.5V
0V
3.8V
IC2
IC9
IC10
IC8
CASSETTE MECHANISM
(D40-1150-05)
SYNTHESIZER UNIT (X14-689X-XX)
(E30-4792-05)
DC1
DATA C
GND
REQ H
CON
MUTE
S GND
Rch
RST
2
4
3
812
7
6
11
10
159
DATA H
Lch
CLK
REQ C
13
R404 100
R405 4.7K R406 4.7K
R402 10
R403 4.7
R407 4.7K R409 4.7K R408 4.7K
R411 100 R410 100
R401 10
C403 100u10
+
C402 1u50
+
C401 1u50
+
13
1
3
2
4
5
L GREF VREF CD R R PH-
6
7
8
CD GND CD L
10
9
11
12
AFS MPX AM LEVEL MP IN
28
AC OUT L
OUT RL
OUT FR
OUT FL
AC OUT R 26
27 25 24
GND
VDD
OUT RR 23
21 22
QUAL
S MUTE
SCL
SDA 19
20 18 17
MP OUT
14 16
15
MUX OUT L
MUX OUT R
FR
RR
RL
FL
5
7
6
30 29 28 27 26 25 24 23 22 21
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5 6
7
8 9
10
31
32
33
34
35
36
37
38
39
40
M-OUT (R)
EQ OUT (R)
D IN (R)
RAI (R)
PB OUT (R)
MS GV (S)
MS GV (R)
MA OUT
MSI
MS DET
VCC
MUSIC
S/R (MSGV)
F/R
MTL
M-OUT (L) RQ OUT (L) D IN (L) RAI (L) PB OUT (L) MUTE
NFI (R)
R IN (R)
RIP
F IN (R)
F IN (L)
V REF
R IN (L)
NFI (L)
1
2
3
4
5
6
7
8
9
10
MODE
MODE+B
SUB(-)
SUB(+)
PACK IN
F/R
GND
HEAD L
HEAD COM
HEAD R
9
71u50
+
C509
B.U.
42
44
16
63
18
17
5
4
3
2
1
SGND
IN2
IN1
NC
VCC
6
7
8
9
10
PGND
OUT2
NC
OUT1
NC
470
0.01
330K 5.1K
0.1u50
+
22u6.3
+
C514
150
R514
0.01
330K 5.1K
+
R513
150 C513 22u6.3
+
C517 0.1u50
15K
1500P
R533 470C532 0.01
R534 100K
470
54
55
47u10
C501
+
0.01
C502
56
180K
R502
0.22u50
C505
+
C506
4.7
R501
57
64
3.3K
R20
R32 22K
10K
R30
C30 0.01
1/2W
10K
R11
1000P
C14
R14
82K
56K
R15
100K
R16
30K
R10
R415 100K
C404 0.01
VDD
GND
1
2
14
13
312
11
4
5
6
7
10
9
8
C40 0.01
77
59
58
0.01
C508
24K
R504
0.47u50
C507
+
1.6K
R503
10u10
+
22
R537
C533C534
9
7
37
38
5
7 6
2.2u50
+
0.01
C202
47u10
+
C201
4.7uH
L201
C203
C206 0.015
C207 0.47
R201 2.7K R202 4.7K
R551 10K
STBY
T-END
GND
GND
4
6
7
5
2
3
1
M+B
R552
1K
20
19
R556 470
R554 470
1/2W
C205 1
C204 1
4.7K
R203
C209 0.1
C208 0.1
C211 150P
C210 0.033
10
9
6
8
7
5
4
1
3
2
HEAD R
HEAD COM
HEAD L
GND
F/R
PACK IN
SUB(+)
SUB(-)
MODE+B
MODE
MODE
FWD/REV
PACK
M+R
GND
T-END
STBY
GND
R413 100K
R414 100K
R412 100K
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
B.U B.U B.U GND GND GND T.MUTE P.CON ACC A.5 RR- RR+ RL- RL+ FL- FL+ FR+ FR-
L1
C20 0.01
R22 47K
47K
R21
R12 100K R23 100K
78
21
22
R31 47K RR-
RR+
RL-
FR+
FR-
RL+
FL-
FL+
3300u16
+
4.7K
C1
R535
R536
22K
R531
4.3K
C515
R517 R519
12K
R515
C512
R512 15K
1500P
C511
R511
R520R518
C516 12K R516
4.3K
R522
R521
9
11
13 10
R2
7
9
9
7
39
1K
R204
4.7K
R205
C518
3
1
2
7
4
5
6
7B 531
6248
REAR. L
FRONT. L FRONT. R
REAR. R
P.CONT OUT
ACC
ANT.CONT
8
75
64
31
2
BATT
A
RED
BLU/WHT BLK YEL
GRN
WHT
GRY
VIOL
GRN/BLK
WHT/BLK
GRY/BLK
VIOL/BLK
0.22 0.22
C531
0.01
4.7K
R1
+B
KRC-4902Y (E)
KRC-30Y (E)
KRC-36 (E)
KRC-365L (M) 2-71
0-22
2-72
2-70
NO
NO
NO
YES
YES
NO
YES
NOYES
YES
NO
YES
MODEL NAME
KRC-391 (E)
UNIT R111C308
KRC-465R (M/I) 0-21 YES YES YES
A1
X86-3512-70
X86-3512-70
X86-3512-72
X86-3512-70
X86-3512-70
IC1
UPD780058GC418
UPD780058GC426
UPD780058GC418
UPD780058GC426
UPD780058GC418 NO NO
YES
YES
NO
R112
NO
NO
YES
YES
YES
R113
+B +B
+2V
+5V
+B
+B
+B
+B
+B
+5V
+5V
+5V
+B
+5V
+B+B +B
+5V
+5V
+B
YES
YES
YES
YES
Q301
NO NONO
YES YES
YES
YES NO NO
YESYES
R146R118
NO
YES
YES
NO
NO
R114
No.
KRC-391Y (E)
KRC-36Y (E)
+B28
+2V
+2V
MUT RST
MT
+8V
+8V
+8V
+8V
DTC114YUA
DTC143TUA
UN5111
UN5114
UN5211
UN5214
UN5216
2SA1036K
2SD1819A
E
C
B
2SD1760
BCE
2SB1443
BCE
2SC4081
B
C
E
DTA114EUA
DTA124EUA
DTC114EUA
DTC124EUA
IN
GND
OUT
DTA114YUA
12
3

JKLMNOP RQ
1
2
3
4
5
6
7
KRC-391/Y,36/Y,30Y
D251
D252
D253
Q224Q223
PRE OUT
J5
J3
Q151
SYSTEM
u-COM
5V SW
POWER
AMPLIFER
Q251
D157
D161
D153 D159
PANEL
5V SW
MUTE
PREOUT
IC SVR
D160
SW
Q301
Q101
D102
EEPRON
DSI
Q50
C
RESET
D101
Q1
P.CON.
DETECTION
RDS DECODER
LOCAL
SEEK SW
2/2
X16-
J1
(E30-4933-05)
ANT
WH1
D154
POWER
POWER
SUPPLY
LR
4.7K 4.7K
47K
10K
47K
10K
22K
22K
22K
22K
0V
7.3V
7.3V
7.3V
7.3V
7.2V
0V
4.7V
14.4V
7.3V
7.2V
7.2V
0V
14.4V
3.3V
0V
7.3V
7.2V
0V
0V
5V
0V
0V
5V
5.0V
0V
5V
2.3V
2.3V
0V
5.0V
0V
0V 5.0V
0V
5.0V
0V
0V
5V
0V
5V
0V
5V
0V
0V
5V
5V
0V
5.0V
5V
0V
5V
0V
5V
0V 5V
0V
5V
0V
0V
5V
0V
5V
4.3V
0V
5V
0V
5V
0V
0V
0V
0V
5.0V
5V
0V
5V
0V
0V
5V
0V
5V
5V
0V
0V
5V
5V
0V
5V
0V
0V
0V
5V
0V
5V
5V
0V
0V
5V
5V
0V 5V
0V
5V
0V
5V
0V
5V
0V
0V
5V
5V
0V
0V
5V
5V
0V
REV : 0V
FWD : 5.0V
0V
5V
0V
5V
5V
0V
5V
0V
0V
5.0V
0V
5.0V
5V
0V
4V
0V
2.5V
5V
0V
1V 2.5V 1.6V
0V
5V
0V
5V
0V0V0V
5.0V
5.1V
14.1V
10.4V
5V
0V
0V
8.0V
8.3V
0V
13.8V
14.4V
8.3V
5V
2.5V
IC4
A1
IC1
IC6
IC12
IC11
A
IC7
2 4 6 8 10 12 14 16 18 20 22 24
GND
STBY
VCC
GND
SVR
IN2
IN4
GND GND
VCC
MUTE
GND
1
3 5
7
9
11
13 15
17
19
21
23 25
TAB OUT2- OUT2+ OUT1- OUT1+ IN1 GND IN3
OUT3+ OUT3- OUT4+
OUT4- CD
4.7K 4.7K
C255 1u50
+
C256 100u10
+
R256
R255 33K
1K
R254
R252
0.22u50
C254
0.22u50
C251
RL
RR
RR-
FR+
FR-
RR+
RL+
FL-
FL+
RL-
+
1u50
+
8.2K
R257
R260
750R261
430
35
TH1
R258 100
R259 22K
R262
180K
270
R224 R232
100 100
R231R223
270 10u16
C223
R227
30K R228 30K
10u16
C224
+C225
C258
R251
4.7K
C252
0.22u50
4.7K
0.22u50
C253 R253
RR
RL
RR
FR
RL
FL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
RF GND
FM ANT
AM ANT
FM+B
AM+B
FM LO/DX
K2I-VTH
VCO-GND
FM SD OUT
FSD OUT
FM DET OUT
AM DET OUT
COMMON+B
IF GND
HI UP ADJ
PLL CE
PLL DATA
PLL CLK
P-ON 5V
DIG GND
IF SELECT
REQUEST
RDS OUT
52mH
L301
10
11
8
+
100u10
C304
0.01
C305
13
30
R305
3.3
1
2
3
4
56
7
8
9
10
11
12
13
14
15
ILL GND
D GND
L RST
SW5V
LAMP +B
LED +B
L DATA S
L CLK
L CE
L DATA L
VDD
RST
REMO
PANEL SW
ESD GND
R153 1K
R161 1K
R154 1K
R158 470
R156 1K
R157 1K
R159 1K
R162 47
12
2
61
6
11
13
34
50
C257 1u50
+
Q251
40
47K
R263
R160 100
5
P1
R155 10
0.01
C303
0.01
C302
100u10
C301
+
4.7uH
L303
L304 4.7uH
12
R303
R304 4.7
C308 0.01
10
4.7uH
L305
29
L306
4.7uH
C306
10u16
0.01
+
C307
AM LO/DX
CP101 1K
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
21
22
23
24
25 26
27
28 29 30
31
32
33
34
35 36
37
38 39 40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AV CONT
NOISE
PHONE
T-MODE
S-METER
AV REF 0
VDD 0
XT1
XT2
IC
X1
X2
VDD 1
VSS 0
KEY-REQ
PACK-IN
CH-REQ C
R-CLK
REMO
RESET
SUB-
SUB+
FWD/REV
EQ-MUTE
MS-CONT
MUSIC
SW5V
EN1
EN3
BEEP
EN2-0
EN2-1
CH-REQ H
CH-CONT
P.CON-DET
ACC-DET BU-DET IC2 TYPE 0 IC2 TYPE 1 TYPE 0 TYPE REF MOTOR PLL-CE SD AFS LO/DX VSS 1 P-MUTE SVR GND
IC2-SCL IC2-SDA
MUTE P-STBY
DSI
PANEL
AVSS
L-RST
L-CE
AVREF1
PLL-DATA
PLL-CLK
L-DATA L
L-DATA S
L-CLK
R-DATA
R-QUAL
CH-DATA C
CH-DATA H
CH-CLK
M-STBY
T-END
1
2
3
4
5
6
7
8
QUAL
RDDA
VREF
MPX
OSEL
GND
ARI
FIL OUT
16
15
14
13
12
11
10
9
RDCK
T57
OSCO
OSCI
VCC
EXTRES
TM
TSEL
10P
C356
10P
C355
9
32
C354 0.01
C353 10u6.3
+
R354
330P
C352
10u6.3
+
C351
CP315
2.2K
10
CP104
1K
R132 1K
78
2.2K
R146
4.7K
R142
58
59
57
56
55
54
53
52
51
48
50
R145
10K
44
42
R144
4.7K
CP102 1K
CP103 10K
22K
R123
1
2
3
4VSS
8
7
6
5
VCC
WP
SCL
SDA
4.7uH
L101
2
5
6
10
82.2K
R102
2.2K
R103
11
R104
100K
12
13
R105 2.2K
R106 2.2K
14
15
16
17
18
20
19
R122 10K
R120 10K
37
38
240
R143
160K
4700P
22K
R141
X1
6.8K
R138
C105
15P
C104 15P
4.19MHz
R135
2.2K
R136
2.2M
61
62
R137 4.7K
28
40
39
35
34
21
22
47K
R51
2.2K
R50
53
14
15
62
2.2K
R353
X2
29
30
32
R116 4.7K R115 2.2K R117 4.7K R118 2.2K
R107 47K
R109 47K
R113 47K
R111 47K
R114 47K
R112 47K
TYPE 1
C106
R140
2 1
3
4
100K
0.1
C101 100u6.3
+
C102 0.01
63
C103
R101
C2
120K
R3
100K
R4
4.7K
R129
4.332
MHz
0.01
+5V
+5V
+5V
+5V
+B
+B
+B
+B
+B +B
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+B
+5V
+5V
+5V
+5V
+5V
+5V
+5V
MT
MUT
RST
0.01
77
64
RST
RST VCC
52
C52
10u16
C51
10u16
+
10u16
VP1
+
+5V +BU.5V
13
C55
+C56
100u16
11 ILLUM
12
EN1
10
+
AUDIO GND
8 9
AM+B
7
10u35
+
C50 1
51
48 P.ANT
FM+B EN3
4
5 6
P.CON EN2
2
3
10u50
C54
10u16
+
C53
+10.4V
+10.4V
+10.4V+10.4V
+8V
+8V
+8V +8V
+8V
+8V
+8V +8V
+8V
+8V
+8V
+8V
+5V
+B
+B
+5V
+B
CAUTION:For continued safety, replace safety critical components only
withmanufacturer’s recommendedparts (referto, 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.
UN5212
3
21
BR24C01AF
BR24C01AF-W
14
5
8
LBP1930M
1
5
6
10
TDA7479D
1
8
9
16

STUVWXY AAZ
1
2
3
4
5
6
7
J1
Q1
Q3
Q2
D11
D14
D20
D12
D22
D9
D7
D6
D4
D2
D1
D8 D5 D21
D13,14 : B30-1564-05
: B30-1605-05
D1-14,20-22
Q2,3 : 2SC4081
Q1 : DTA114EUA
IC2 : RS-171
IC1 : LC75883E
J3
X14-
1/2
REMOTE
SENSOR
KEY SCAN
SW
KEY ILLUMI-
NATION SW
RST
D18
D19
D10
LCD DRIVER
VOL+ VOL-
SRC AUD AUTO CLK
ATT 1 2
4356
FM AM
B
A
: MA3062WA
: B30-1633-05
D17-19
D15
GND LINE
D17
D11
D14
D13
D3
D3
D13
D15
B LINE
AB
S5
S6
S7
S8 S2S4
S3 S1
S10
S9 S22
S23
S21 S20
S11
S12 S13 S14
S18 S17 S16 S15
S28S25
S29S24S27S26
S19
10K
10K
5.0V
5.0V
3.0V
1.5V
0V
5V
0V
3.9V
0V
0V
0V 5V
0V
ED1
IC1
IC2
SWITCH UNIT (X16-1XXX-XX)
A
17
14
5
59
54
55
15 16
4
17 18
7 6
19 20
8
21 22
13
11
9
10
23 24
12
25 26
15
14
27 28
16
29 30
33
25
21
19 18
31 32
20
33 34
23
22
35 36
24
37 38
29
27
26
39 40
28
41 42
31
30
43 44
32
45 46
35
34
47 48
36
49 50 51 37
38
52 39
C2
54 55 C1 56 C3 1 242
41
6 4 3 5 7 8
44
43 45
47
46 48
10 9 11 13 12
50
49
51
52
53
ILL-GND
D-GND
L-RES
SW5V
LAMP+B
LED+B
L-DATAS
L-CLOCK
L-CE
L-DATAL
PANEL 5V
RESET
REMO
PANEL SW
ESD-GND
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
2
3
4
5 6
7
8 9
10
11
12
13
14
15 16
17
18 19 20
21
22
23
24
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
KS6 KS5
KS4
KS3
KS2
S56
COM3
COM2
COM1
S55
S54
S53
S52
S51
S50 S49 S48
S47
S46 S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
S32
S31
S30
S29
S28
S27
S26
S25
GREEN RED KEY S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24
KI1
KI2
KI3
KI4
KI5
VDD
VDD1
VDD2
VSS
TEST
OSC
L-RES
L-DATA L
L-CE
L-CLK
L-DATA S
KI1
KI2
KI4
KI3
C3 0.047
C1
C2 0.047
56K
0.01
R4 4.7
R3 4.7K
R2
79
80
78
76
77
80
79
77
78
R5 1K
R6 470
R7 470
R9 470
R8 470
1 4
OUT
VCC
2
3GND2
GND1
R10 1K
76
C5
KS5
25
4 5
6 7 8 9
10
11
12
13
14
15 16
17
18 19
20
21
22
23
24
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
KS4
KS3
KS2
C3
C2
C1
55
54
53
52
51
50
49 48
47
46 45
44
43
42
41
R12
R11
R20 47
2.2K
2.2K
R17
510
R18
510
R23 R16
330
R13
330
R15
330
KI1
KI2
KI3
KI4
KI5
IC2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
59
KS2
KS3
KS4
SK5
2.2
KI5
40
53
Q2,3
R14
0.01
C8
220
R19 220
R22
+B
X16-1532-71
KRC-30Y (E)
KRC-465R (M/I)
KRC-365L (M) X16-1532-70
KRC-391 (E)
MODEL NAME
KRC-36 (E)
KRC-4902Y (E)
X16-1722-70
X16-1532-70
X16-1722-70
UNIT No.
NO
YES
NO
B30-1564-05YES
B30-1605-05
YES
NO
D13,14
YES
KRC-391Y (E)
YES
KRC-36Y (E) X16-1532-70
X16-1532-71
X16-1532-71
C6
0.01 0.01
C7
NO
NO
YES
YES
YES
NO
NO
NO B30-1564-05
B30-1564-05
B30-1564-05
B30-1564-05
B30-1605-05
B30-1605-05
470
470
470
17
360
R14,
360
360
360
360
C4
1000P
R1
+B
+B
+B
+5V
+5V
+5V
+5V
+5V
+5V
TP35
TP33
TP32
TP31
TP30
TP29
TP27
TP28
TP26
TP24
TP23
TP22
TP21
TP5
TP4
TP3
TP1
TP2
TP9 TP8 TP6TP7
TP15
TP14
TP13
TP12
TP11
TP16 TP17 TP18 TP19
47K
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-391/Y,36/Y,30Y