Kenwood KDC-8021 User manual

PREOUT
TEXT
COMPACT
DIGITAL AUDIO
PTY/D.REP
TIRDS LOUD STATTSQIN
F.SEL RDM
P.M/M.RDM
READY
SIRIUS
AUTO
SCN
NF
50Wx4
SRC
DAB
1/5 2/6 3/7 4/8
REP MENU
AUD
OFF
ANG SCRL
KDC-X859
PREOUT
TEXT
COMPACT
DIGITAL AUDIO
PTY/D.REP
TIRDS LOUD STATTP/SIN
F.SEL RDM
P.M/M.RDM
TI
SCN
NF
50Wx4
SRC
DAB
1/5 2/6 3/7 4/8
REP MENU
AUD
OFF
ANG SCRL
KDC-M9021
GSM
TEXT
COMPACT
DIGITAL AUDIO
PTY/D.REP
TIRDS LOUD STATTP/SIN
RDM
P.M/M.RDM
TI
SCN
50Wx4
SRC
DAB
1/5 2/6 3/7 4/8
REP MENU
AUD
OFF
ANG SCRL
KDC-8021
GSM
KDC-8021/M9021/X859
CD RECEIVER
SERVICE MANUAL
C2002-2 PRINTED IN KOREA
B51-7901-00 (K) 3169
The CD mechanism information is not in this service manual.
Please, refer to service manual.
KDC-M9021/X859 : X92-4460-0x(B51-7891-00)
KDC-8021 : X92-4450-01(B51-7889-00)
Panel assy
(A64-2567-02)
KDC-X859
Panel assy
(A64-2588-02)
Panel assy
(A64-2587-02)
KDC-M9021
KDC-8021
Escutcheon assy
(B07-3007-03)
Escutcheon assy
(B07-3007-03)
Escutcheon assy
(B07-3007-03)
1
DC cord
(E30-4939-05)
DC cord
(E30-4956-05)
Plastic cabinet assy
(A02-1497-13)
Remote con.assy
(A70-)
Antenna adaptor
(T90-0523-05)
Escutcheon
(B07-3010-02)
Mounting hardware assy
(J21-9716-03)
Lever
(D10-4562-04)
Bracket (L)
(J19-5051-03) Torsion coil spring
(G01-2924-04)
Screw set
(N99-1722-05)
Screw set
(N99-1704-05)
∗
∗Remote con.assy
(A70-0886-15) ∗∗
Bracket (R)
(J19-5052-03)
∗
∗
∗
Depends on model. Refer to the parts list.
∗

ILL
TEL MUTE
ACC
ANT CON
P CON
BACK UP
EXT AMP CONT
PLL+B
BUFFER DECODER
RDS
E-VOL
MPX
N.C.
IF+B
SYSTEM u-COM
RESET
SW
A8V SW14V
EXT AMP CONT
DIMMER
ACC DET
TEL MUTE
P CON
B.U DET
ANT CON
SW5V B.U. 5V
PAN5V
MASK
MECHA
POWER IC
THERMO
PROTECT
IC4
MUTE
PRE AMP
4.5V
IC11-13
SP OUT
PRE OUT
RESET
AM+B
FM+B
NOISE
BUFFER
SPEANA
AGC OP AMP
SYSTEM
E'S+
MUTE DRIVER
IC9
4.5V
SERVO
AVR
DC/DC
4.5V PRE
IC15
DRIVER
MASK
REMO
O-CE
O-CLK
O-DATA STEERING REMOTE
EXTERNAL DISPLAY
DC/DC
REG
CD4.7V
DC/DC
IC7
MATRIX
KEY
REMO
FL3.3V SW
VFD (GRADATED)
SPEANA
BPF
G/R SW
PANEL
u-COM
FL+B SW
VFD (GRADATED)
MATRIX
KEY
RESET
SW
FL3.3V SW
REMO
ROM
FL+B SW
PANEL
u-COM
SPEANA
BPF
G/R SW
IC10
IC14
IC2
CONTROL
1.8V
PRE OUT
PRE OUT OUTPUT VOLTAGE
IC1
IC5
IC8
251mV (E) TYPE
470mV (K) TYPE
FM: AM:
230mV
F/E
CD
CH
(X16-160)FL (2 COLOR) TYPE
(X16-161)
FL (GRADATED) TYPE (X16-158)
(X16-159)
AUDIO
S-METER
IFC OUT
PLL DATA
PLL CLK
SW5V
FM
AM
CD
CHANGER
S METER
QUAL
SDA SCK
S MUTE
A 8V
MASK SW1
RCLK
QUAL
RDATA
NOISE
S METER
AFS
IFC OUT
PLL DATA
PLL CLK
SW1
M RST
LO/EJ
MO SW
MUTE R
MUTE L
M STOP
SW3
DATA C
CH RST
CH MUTE
SW2
DATA H
CH CON
CH CLK
REQ H
REQ C
MASK DET RESET
AM+B
FM+B
SCK
SDA
PRE MUTE
MUTE
BEEP
P MUTE
ACC DET
PHONE
DIMMER
EXT AMP CONT
P CON
PAN5V
P ON
ANT CONT
B.U. DET
SW5V
SW5V
CH MUTE
CH RST
DATA H
DATA C
CH CON
REQ C
CH CLK
REQ H
BACK UP
1200mV
CD4.7V
SERVO +B
A8V
PAN5V B.U. 5VSW5V
MUTE AC GND
BACK UP
SW5V
B.U.5V
+B
FM
4500mVCD
AM 750mV
2250mV
1069mV
1715mV
(K) TYPE (E) TYPE
4500mV
B.U. 5V
SW5V
SCK SDA
B.U. 5V
-B
SERVO+B
+B
-B
MASK SW2 MASK SW3 O-CE REMO O-DATA O-CLK MASK + MASK - CD-MECHA+B ILL ON
CD4.7V
PANEL 5V
PANEL 5V
VDD1 VDD2
FAC
PANEL 5V
PANEL 5V
VDD1 VDD2
FAC
AFS
MS CLK
MS DATA
M STOP
M RST
MUTE L
MUTE R
MO SW
LO/EJ
SW1
SW2
SW3
A8V
B.U. 5V
(MP3. WMA)
CH
3600mV
1372mV
855mV
(E) TYPE
4.5V PRE 1.8V PRE
MODE
4500mV 4500mV 3600mV
1200mV
KDC-8021/M9021/X859
2
BLOCK DIAGRAM

KDC-8021/M9021/X859
3
COMPONENT DESCRIPTION
Element Purpose & Function Operation, Condition, Compatibility
IC1 System uCOM
IC2 E.Vol & N.C. MPX
IC3 Power Supply IC Error detection in combination with Q8. Audio 8 V AVR drive.
IC4 POWER IC 50Wx4ch
IC5 HPF & LPF & NON-FAD SW
IC6 CD mechanism 4.7 V power SW-Reg.
IC7 4.5 V PRE-OUT DC/DC
IC8 RESET IC "L" when Mask uCOM detection voltage is 3.7 V or less or
when Flash uCOM detection voltage is 4.2 V or less.
IC9 Muting logic IC 4 inputs. NOR gate x 4.
IC10 Spectrum analyzer opamp
IC11 4.5 V PRE-OUT opamp Front output.
IC12 4.5 V PRE-OUT opamp Rear output
IC13 4.5 V PRE-OUT opamp Non-Fad. output
IC14 RDS decoder
IC15 Motor Dr. IC For storage mechanism
IC16 E2PROM
Q1,2 BU 5V AVR Darlington connected.
Q3 SW 5V ON when the base is "L".
Q4,5 SW 14V Turns Q7 ON when the base of Q5 is "H".
Q6,7 AUDIO 8V AVR ON/OFF SW 8 V ON/OFF SW. Q7 turns ON when the base of Q6 is "H".
Q8 AUDIO 8V AVR
Q9 Servo power AVR
Q10 CD 4.7V SW-Reg ON/OFF SW CD 4.7 V SW-Reg ON/OFF SW. ON when the base is "H".
Q11,12 FL & ILLUM AVR ON/OFF SW FL & ILLUM AVR ON/OFF SW.
Q12 turns ON when the base of Q11 is "H".
Q13,14 FL & ILLUM AVR ON/OFF SW
Q15,16 4.5 V PRE-OUT DC/DC converter AVR Darlington connected.
Q17~22 Regulated power supply Tr.
Q23,24 POWER-ANT SW Q24 turns ON when the base of Q23 is "H".
Q25,28 POWER-CONT SW Q25 turns ON when the base of Q28 is "H".
Upon detection of drop in the output voltage, these transistors turn
Q26,27 POWER-CONT circuit output protection Q25 OFF to protect the output. This prevents malfunction of Q26 when
the POWER-CONT SW turns ON.
Q29 External amp control SW Turns ON when a pulse is input to the base.
Q30 Dimmer control SW Small In is detected when the base is "H".
Q31 B-U detection "L" when B-U is present. "H" when B-U is absent or momentary power
down is detected."
Q32 Acc detection "L" when Acc is present.
Q33 Lch MUTE Dr L-ch audio muting SW drive. ON when the base is "L".
Q34 Rch MUTE Dr R-ch audio muting SW drive. ON when the base is "L".
Q35 Spectrum analyzer AGC Tr.
Q36 E-Vol muting SW When the base is "L", turns ON to mute E-Vol.
Q37 Noise buffer
Q38 AUDIO MUTE SW Mutes the Front R CH hen the base is "H".
Q39 AUDIO MUTE SW Mutes the Front L CH hen the base is "H".
Q40 AUDIO MUTE SW Mutes the Rear R CH hen the base is "H".
Q41 AUDIO MUTE SW Mutes the Rear L CH hen the base is "H".
Q42 AUDIO MUTE SW Mutes the Non-FAD R CH hen the base is "H".
Q43 AUDIO MUTE SW Mutes the Non-FAD L CH hen the base is "H".
Q45,46 FM+B SW Q46 turns ON when the base of Q45 is "H".
Q47,48 AM+B SW Q48 turns ON when the base of Q47 is "H".
Q49 Composite signal buffer
Q50 PANEL 5V SW When the panel is attached, the base goes "L", turning the transistor
ON to supply 5 V to the panel.
ELECTRIC UNIT (X25-91xx-xx)

KDC-8021/M9021/X859
4
COMPONENT DESCRIPTION
Element Purpose & Function Operation, Condition, Compatibility
IC1 PANEL u-com
IC2 SPECTRUM ANALYZER IC
IC3 REMOTE CONTROL IC
IC4 BUFFER IC It is changed into 3.3V from 5V
IC5 3.3V REGULATER The power supply of IC and UFD(Logic) which are driver by 3.3V
Q1 REMO ON SW The power supply of IC2 and IC3 is turned on when the base level goes "L".
Q2 SC-CON SW ON when the base level goes "H".
Q3,4 FL+B SW FL+B(VDD2) is turned on when Q3's base level goes "H".
Q5 FL BLK SW ON when the base level goes "H".
Q6,7 KEY ILLUMINATION SW Lights green key-illumination when Q6's base level goes "H".
Lights red key -illumination when Q7's base level goes "H".
SWITCH UNIT (X16-16xx-xx)

KDC-8021/M9021/X859
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin Name I/O Processing Operation
1 SC DATA I/O Data communication with System Controller.
2 MC CLK I Clock input from System Controller.
3NC O
4 DATA1 O Data communication with FL driver.
5 CLK O Clock communication with FL driver (rise data shifting).
6NC O
7 DATA 2 O Data communication with FL driver
8 CLK IN I Data communication with FL driver (fall data shifting)
9 EVDD - PAN.5V
10 EVSS - GND
11 RED LED O ILL Red switching. "H": ON. "L": OFF.
12 GREEN LED O ILL Green switching. "H": ON. "L": OFF.
13 REMO I Input from Remote Control IC.
14 LATCH O Latch for FL driver. "H": Through. "L": Latch.
15 GCP O Brightness gradation control.
16 REMO ON I/O Remote Control IC power ON/OFF. "Hi-Z": OFF. "L"": ON.
17-19 NC O
20 BLK O Display for FL driver. Blanking display. "H": Display ON. "L": Display OFF.
21 TEST I INTEMALLY CONNECTED
22-33 NC O
34 RESET I RESET
35 XT1 - GND
36 XT2 -
37 REGC - Regulator capacitance connection.
38 X2 - MAIN CLOCK
39 X1 - MAIN CLOCK
40 VSS - GND
41 VDD - PAN.5V
42-47 NC O
48 FL +3.3V O FL +3.3V ON/OFF "H":ON "L":OFF
49 FL +B I/O FL+B ON/OFF "H":FL+B ON "Hi-Z":FL+B OFF
50-57 NC O
58 BVDD - PAN.5V
59 BVSS - GND
60-73 NC O
74 AVDD - PAN.5V
75 AVSS - GND
76 AVREF -
77 F01 I BPF(63Hz)
78 F02 I BPF(150Hz)
79 F03 I BPF(330Hz)
80 F04 I BPF(1kHz)
81 F05 I BPF(3.3kHz)
82 F06 I BPF(10kHz)
83 WAVE IN I Voice input.
84 KR3 I KEY RETURN
85 KR2 I KEY RETURN
86 KR1 I KEY RETURN
87 VOLUME B I VOLUME CONTROL
88 VOLUME A I VOLUME CONTROL
89 SC REQ O Request communication with System Controller. "H": Requested. "L": Standby.
90 NC(FAC IN) O (FAC data input) (Flicker prevention circuit input)
91 SC CON I Panel uCOM control. During operation: "L".
92 OPEN KEY I OPEN KEY "H":ON "L":OFF
PANEL MICROCOMPUTER UPD703032GFA03 (X16)