KRC-13R,178R,23R,278R,280R
2
BLOCK DIAGRAM
IC1
KEY
PANEL 5V SW
MUTE
B.U. DET.
B.U.
ACC
P-CONT.
MUTE
PRE
POWER IC
CH ISO AMP
NC/MPX/
E-VOL.
CD/MD
CHANGER
FRONT Lch
FRONT Rch
REAR Lch
REAR Rch
J2
LCD DRIVER
LCD
ME1
1 Lch
2 Rch
PRE OUT
IC2
IC4
IC3
SP OUT
REAR
J4
RESET SW
PAN IN SW
ACC DET.
P-CONT.
J2
J5
IC1
FRONT-END
J1
FM+B
Q201
AM+B
Q203
AM BPF
FM BPF
C154,157,R206
C153,156,R207
Q320
Q450,451
Q49
Q50
Q350-353
Q353
P-CON.SW
Q54-57
8V
Q58-61
ILLUMI.
B.U.5V
Q51,52
SYSTEM u-COM
P-CONT.
CD-CH
RST SW
Q301
D1-15
PL1,2
ANT.
TEL MUTE
DECODER
RDS
IC7
Q501,502
MP SW
40W
RESET
IC6
ED1
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
P. ON
ACC DET
B.U. DET
SCL
MUTE
SDA
P. CON
P
ANEL
RESET
L CLK
L
D
ATA
S
L
D
ATA
L
FWD/REV
M
OTO
R
CH CON
D
ATA
H
D
ATA
C
REQ H
REQ C
CH CLK
MP IN
AM
MPX
OUT RR
OUT LR
OUT RF
Rch
LEVEL
SCL
SDA
OUT LF
Rch
STBY
MUTE
Rch
Lch
BU5V
8V
B.U.
CHRST
S MUTE
8
5
10
B.U.5V
AM+B
VDD 5V
P
A
CK IN
L RES
PHONE
CHMUTE
BEEP
SVR
AMP. STBY
SVR
AC GND (BEEP)
Lch
Lch
Rch
Lch
1200mV
TAPE :1681mV
CD/MD-CH :3529mV
AM :772mV
FM :1339mV
RF GND
OSC GND
IF2 +B
AUDIO OUT
8V
S-METER
SD
PLL-SCL
PLL-SDA
HD1
55.6mV
BU5V
SW5V
8V
B.U.5V
AM: 170mV
FM: 213mV
AMP. MUTE
FF/REW
BU5V
R QUAL
R CLK
R DATA
SW5V
MP OUT
QUAL
AFC
NOISE
BU5V
ILL
L CE
KRC-13R,178R,23R,278R,280R (E,E,E,E,M)
A1
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TEL 13942296513 QQ 376315150 892498299
