File name Kenwood-KDC8090R car rec.pdfCD RECEIVER
KDC-8090R
SERVICE MANUAL
© 2001-1 PRINTED IN JAPAN B51-7721-00(S) 1947
Knob(EJECT) (K25-1215-03)
Front glass (B10-3262-01)
Panel assy (A64-2159-02)
KDC-8090R
PTY
ANG
DIGITAL AUDIO COMPACT
TEXT
OFF SRC
DISC DAB
K 3i
DISP NAME
50Wx 4 LOUD CLK
EX
MENU SCAN RDM REP M. RDM TI VOL ADJ AUD DISC
Knob(VOL) (K25-1216-03)
Knob(1-6) (K25-1221-03)
Knob(FM/AM) (K25-1218-03)
Antenna Adaptor (T90-0523-05)
Plastic cabinet assy (A02-1497-03)
Torsion coil spring (G01-2924-04)
Remote controller assy (A70-0886-15)
Screw set (N99-1704-05)
DC cord (E30-4956-05)
Mounting hardware assy (J21-9716-03)
Remote controller assy (A70-2015-05)
Lever (D10-4562-04)
QUAL
KDC-8090R
S-METER SDA SCL S-METER
AFS
RDCK RDDA QUAL
SDA SCL
AFS
BU5V
S-METER
IFC OUT
A8V
NOISE
RESET
PANEL RST SC REQ MC REQ MC CLK SC DATA MC DATA
SRM DET SRM SW1 SRM SW2 SRM SW3
RST REQ C CLK DATA H CH-CON REQ H DATA C MUTE DRIVER
SRM SUB+ SRM SUB-
2
A8V
F/E IC4 POWER IC
470mV (K TYPE) 251mV (E TYPE)
SW5V
PLL+B
FM+B IC2 SP-OUT
AM+B
230mV FM
IF+B Q37-42 MUTE PRE OUT E-VOL
CD
AUDIO OUT
Q52 BUFF
AM
IFC OUT CH SW5V SW5V
IC7 MUTE DRIVER PRE OUT OUTPUT VOLTAGE
1200mV
IC14 RDS DECORDER
MODE CD FM AM CHANGER
CD
Q36 NOISE BUFFER
MS CLK MS DATA
IC1
PRE MUTE MUTE
IC8 SPEANA AGC OPAMP
4.5V PRE K TYPE E TYPE 4500mV 4500mV 2250mV 1715mV 750mV 1069mV 4500mV 4500mV
1.8V PRE K TYPE E TYPE 3600mV 3600mV 1800mV 1372mV 600mV 855mV 3600mV 3600mV
SERVO+B
Q14 EX.AMP CONTROL Q15 DIMMER 2WAY MUTE Q31 ACC DET. Q3 SW5V Q51 PANEL 5V Q1,2 BU5V P CON Q26-29 ANT-CON
EX.AMP CONTROL DIMMER TEL-MUTE NAVI-MUTE ACC
SW1 SW2 SW3 M STOP M RST MUTE L MUTE R LO/EJ MO SW
u-COM
1200mV
CH
BACK UP
ANT-CONT P-CON BACK UP Q9 SERVO AVR Q4-6 A8V Q7,8 SW14V
BLOCK DIAGRAM
BU5V
Q30 BU DET.
IC16 RESET IC
SRM MECHA
IC15 SRM DRIVER
FL(NORMAL) TYPE (X16-128)
RESET SW IC1 G/R SW PANEL u-COM IC3 REMO
PANEL 5V
IC2 SPEANA BFP
KEY MATRIX
VFD (NORMAL)
FL+B FAC
DC/DC BOX
DC/DC REG
KDC-8090R
MICROCOMPUTER'S TERMINAL DESCRIPTION
System µ-com: UPD703033GC051 qTerminal description
Pin 1 2 3 4 5 6 7 8 9 10 11 Function AM+B FM+B AFS PLL-DATA PLL-CLK Evdd Evss N.C BEEP N.C PRE-MUTE L I/O O O O I/O I/O O O O O Description AM power terminal FM power terminal Switching terminal for noise detection Data I/O terminal to F/E CLK terminal to F/E Positive power terminal GND terminal Open (not used) BEEP output terminal Open (not used) L (during CD): when M MUTE L is L (low) L during momentary power down Fixed at H only during 2 zone L (during CD): when M MUTE R is L (low) L during momentary power down Fixed at H only during 2 zone IC2, IC5, CD mechanism, DATA line IC2, IC5, CD mechanism, CLK line Open (not used) Open (not used) Open (not used) Test terminal Power IC MUTE terminal Power IC STBY terminal MUTE termianl Open (not used) Open (not used) ACC detection terminal Small detection terminal 5 volt power terminal External AMP control terminal (200ms) Processing Operation H: During AM radio op |