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CD RECEIVER

KDC-8021/M9021/X859
SERVICE MANUAL
C 2002-2 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)

KDC-X859
NF
DAB
KDC-X859
COMPACT


DIGITAL AUDIO
TEXT




Panel assy
PREOUT


SIRIUS
Escutcheon assy
READY



(A64-2567-02) IN
OFF
SQ
AUD
ATT ST LOUD
REP
RDS
RDM F.SEL
TI
MENU
(B07-3007-03)
SCN PTY/D.REP P.M/M.RDM

50Wx4 AUTO SCRL ANG

SRC 1/5 2/6 3/7 4/8




KDC-M9021 NF
DAB
KDC-M9021



Panel assy
COMPACT


DIGITAL AUDIO
TEXT
Escutcheon assy
(A64-2587-02) PREOUT
IN
OFF
P/S
AUD
ATT ST LOUD
REP
RDS
RDM F.SEL
TI
MENU
(B07-3007-03)
SCN GSM PTY/D.REP P.M/M.RDM

50Wx4 TI SCRL ANG

SRC 1/5 2/6 3/7 4/8




KDC-8021
DAB
KDC-8021



Panel assy
COMPACT


DIGITAL AUDIO
TEXT
Escutcheon assy
(A64-2588-02) IN
OFF
P/S
AUD
ATT ST LOUD
REP
RDS
RDM
TI
MENU
(B07-3007-03)
SCN GSM PTY/D.REP P.M/M.RDM

50Wx4 TI SCRL ANG

SRC 1/5 2/6 3/7 4/8




DC cord DC cord Plastic cabinet assy Remote con.assy Remote con.assy Antenna adaptor
(E30-4939-05) (E30-4956-05) (A02-1497-13) (A70-) (A70-0886-15) (T90-0523-05)




Lever Screw set Screw set
(D10-4562-04) (N99-1722-05) (N99-1704-05)
Escutcheon Mounting hardware assy
(B07-3010-02) (J21-9716-03)



Bracket (L)
(J19-5051-03)
Torsion coil spring
(G01-2924-04)



Bracket (R)
Depends on model. Refer to the parts list. (J19-5052-03)
KDC-8021/M9021/X859
2


A 8V
SW5V +B
F/E IC11-13
PLL+B
FM: AM:
470mV (K) TYPE 4.5V
IF+B FM+B 230mV 4.5V PRE OUT
251mV (E) TYPE
PRE AMP
B.U.5V
AM+B IC2 IC5 PRE OUT OUTPUT VOLTAGE
AUDIO 4.5V PRE 1.8V PRE
FM E-VOL SYSTEM MUTE -B
SW5V MODE (K) TYPE (E) TYPE (E) TYPE
AM N.C. E'S+
1200mV CD 4500mV 4500mV 3600mV
IC14 MPX
CD FM 2250mV 1715mV 1372mV
RDS 1200mV
BUFFER CHANGER AM 750mV 1069mV 855mV
DECODER




SDA
SCK
CH 4500mV 4500mV 3600mV
IC9
S-METER S METER
AFS S MUTE MUTE DRIVER B.U. 5V 1.8V
IFC OUT SW5V
PLL DATA
PRE OUT
PLL CLK




SDA
SCK
NOISE QUAL BACK UP
BUFFER IC4

POWER IC
IC10 SP OUT




AC GND
SPEANA




MUTE
AGC OP AMP THERMO
SW5V
PROTECT


AM+B
FM+B


SDA
SCK
RCLK PRE MUTE
QUAL MUTE
RDATA P MUTE




BLOCK DIAGRAM
CD NOISE BEEP
S METER EXT AMP CONT EXT AMP CONT EXT AMP CONT
MS CLK AFS
MS DATA
IFC OUT
DIMMER DIMMER ILL
PLL DATA
PLL CLK PHONE TEL MUTE TEL MUTE
SW1 SW1 IC1
SW2 SW2 SYSTEM u-COM ACC DET ACC DET ACC
SW3 SW3
M STOP M STOP
M RST M RST ANT CONT ANT CON ANT CON
MUTE L MUTE L
MUTE R MUTE R P CON P CON
P CON
LO/EJ LO/EJ
MO SW MO SW PAN5V PAN5V
SERVO +B B.U. DET B.U DET SW5V B.U. 5V
CH CLK
CD4.7V REQ H PAN5V




CD-MECHA+B
(MP3. WMA) REQ C SW5V SW5V B.U. 5V
MASK SW1
MASK SW2
MASK SW3
MASK DET




B.U. 5V DATA C
DATA H MASK +



O-DATA
A8V
MASK -
RESET




BACK UP




ILL ON
O-CLK
REMO
CH CON



O-CE
P ON
CH RST
CH MUTE REMO EXTERNAL DISPLAY
CH O-DATA
O-CLK STEERING REMOTE
CH CLK
REQ H IC8 O-CE CONTROL
REQ C IC15
DATA C RESET MASK A8V A8V SW14V
B.U. 5V
DATA H MECHA MASK
CH CON DRIVER SERVO
CH RST
CH MUTE SERVO+B AVR
IC7
+B 4.5V PRE
-B DC/DC
BACK UP


FL (2 COLOR) TYPE (X16-160) FL (GRADATED) TYPE (X16-158) CD4.7V CD4.7V
(X16-161) (X16-159)
PANEL 5V SPEANA PANEL 5V SPEANA DC/DC
BPF BPF DC/DC REG
ROM

REMO PANEL G/R SW REMO PANEL G/R SW
u-COM u-COM
KEY KEY
MATRIX MATRIX

RESET PANEL 5V RESET PANEL 5V
SW SW
FL3.3V SW FL+B SW FL3.3V SW FL+B SW

VDD1 VDD2 VDD1 VDD2
FAC FAC
VFD (GRADATED) VFD (GRADATED)
KDC-8021/M9021/X859
COMPONENT DESCRIPTION
ELECTRIC UNIT (X25-91xx-xx)
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
"L" when Mask uCOM detection voltage is 3.7 V or less or
IC8 RESET IC
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".
FL & ILLUM AVR ON/OFF SW.
Q11,12 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".
"L" when B-U is present. "H" when B-U is absent or momentary power
Q31 B-U detection
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
When the panel is attached, the base goes "L", turning the transistor
Q50 PANEL 5V SW
ON to supply 5 V to the panel.
3
KDC-8021/M9021/X859
COMPONENT DESCRIPTION
SWITCH UNIT (X16-16xx-xx)
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".
Lights green key-illumination when Q6's base level goes "H".
Q6,7 KEY ILLUMINATION SW
Lights red key -illumination when Q7's base level goes "H".




4
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
PANEL MICROCOMPUTER UPD703032GFA03 (X16)
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.
3 NC O
4 DATA1 O Data communication with FL driver.
5 CLK O Clock communication with FL driver (rise data shifting).
6 NC 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

5
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
PANEL MICROCOMPUTER UPD703032GFA03 (X16)
Pin Name I/O Processing Operation
93 SRC KEY I SOURCE KEY "H":ON "L":OFF
94 VREF CON O Vref control. During operation: "H"
95 MC REQ I Request from System uCOM. "H": Requested.
96 KS4 I/O Key scan. (Hi-Z/L scan)
97 KS3 I/O Key scan (Hi-Z/L scan). (Flash uCOM write port) (DI)
98 KS2 I/O Key scan (Hi-Z/L scan). (Flash uCOM write port) (DO)
99 KS1 I/O Key scan (Hi-Z/L scan). (Flash uCOM write port) (CLK)
100 MC DATA I Data communication with System uCOM.




6
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD703033AGF-***-3BA (X25)
Processing During Processing During
Pin Name I/O Purpose Processing Operation
Non-Operation STBY
DATA line to Panel
1 MC-DATA I/O Hi-Z Hi-Z
uCOM.
Panel attached: "H".
2 MC-CLK O CLK line to Panel uCOM. H
Detached: "Hi-Z".
3 PLL-DATA I/O DATA I/O to/from F/E. Hi-Z Hi-Z
4 PLL-CLK I/O CLK I/O to/from F/E. Hi-Z Hi-Z
AM power supply
5 AM+B I/O During AM operation: "H". Hi-Z Hi-Z
terminal.
During FM operation: "H".
6 FM+B I/O FM power supply terminal. With RDS and RBDS Hi-Z Hi-Z
only, last FM: "H".
7 CH-CON O CH control output. ON:H OFF: L L L
Normally "H". In recovery
after system RST,
8 CH-RST O CH reset output. L L
remains H for 400 ms
then goes L"
Positive power supply
9 Evdd -
terminal.
10 Evss - GND terminal.
Last FM with RDS
During FM seek and
Time constant switching and RBDS: "H".
11 AFS O AM search: L. L
upon noise detection. Without RDS and
During reception; H.
RBDS: "L".
12 BEEP O Beep output terminal. L L
Since there is no
Wired remote input
13 REMO I wired remote control,
terminal.
connected to GND.
14 N.C O Output Open. Not used. L
15 N.C O Output Open. Not used. L
IC2, IC5 and CD
16 IC2-SDA I/O Hi-Z Hi-Z
mechanism DATA line.
IC2, IC5 and CD
17 IC2-SCL I/O Hi-Z Hi-Z
mechanism CLOCK line.
"L" when M MUTE R is
L (during CD playback).
"H" (other sources
18 PRE-MUTE R O PREOUT(Rch)MUTE "L" during momentary H
than CD)
power down. "H" only in
2-zone operation.
"L" when M MUTE R is
L (during CD playback).
H (other sources
19 PRE-MUTE L O PREOUT(Lch)MUTE "L" during momentary H
than CD)
power down. "H" only in
2-zone operation.
20 N.C O Output Open. Not used. L
21 TEST - Test pin. Normal: "L". During
power OFF: "H" in 5 sec. "H" ("L" in 5 sec.
22 N.C(SVR) O
Power OFF: H after Power OFF).
Power OFF: L All OFF: "L ("H" in 5 sec.
23 P-MUTE O Power IC MUTE terminal. H
"L". Tel muting: "L" after P-ON OFF).
POWER IC ON: H
24 P-STBY O Power IC STBY terminal. POWER IC OFF : L L L
ALL OFF: H
ON: Open. OFF: "L".
Open ("H" in 5 sec.
25 MUTE O Muting terminal. Time constant: 0.48 ms L
after P-ON OFF). 7
(with both ON/OFF)
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD703033AGF-***-3BA (X25)
Processing During Processing During
Pin Name I/O Purpose Processing Operation
Non-Operation STBY
"L ("Hi-Z" in 10 sec.
26 SW5V I/O 5V power supply terminal. ON: L OFF: Hi-Z Hi-Z
after Power OFF).
B-U present: "L".
Momentary power down
27 BU-DET I B-U absent (momentary
detection terminal.
power down): "H".
Acc present: "L".
28 ACC-DET I Acc detection terminal.
Acc absent: "H".
29 N.C O Output Open. Not used. L
30 DIMMER I Small detection terminal. ON: L OFF: H
"L for 40 ms: Bass Boost
Off.
EXT-AMP- External amp control "L" for 70 ms: Bass Boost
31 O H H
CONT terminal (200 ms). Low.
"L" for 100 ms: Bass
Boost High.
POWER ON: H
32 P-CON I/O Power control terminal. POWER OFF: Hi-Z Hi-Z Hi-Z
ALL OFF: Hi-Z
TUNER, TI ON: H Other
sources in last FM with
33 ANT-CON O Antenna control terminal. RDS: "H". Other sources L L
in last FM with RBDS,
TI ON: "H".
34 RESET I Reset input terminal. Normal: "H". Reset: "L".
Sub-clock connection Clock count. Working
35 XT1 I
terminal. while power is OFF.
Sub-clock connection
36 XT2 -
terminal.
Output terminal for
37 REGC - capacitor of Reg.
in uCOM.
During power ON:
Oscillating. During power
Main clock connection
38 X2 - OFF and momentary
terminal.
power down: Oscillation
stopped.
Main clock connection
39 X1 I
terminal.
40 Vss - GND terminal.
Positive power supply
41 Vdd -
terminal.
Internal system clock
42 CLKOUT O
terminal.
With CD source: "L".
Other sources than CD:
"Hi-Z". Models without
43 CD MECHA+B I/O CD 4.7 V output terminal. MP3 or WMA: Output "L". Hi-Z Hi-Z
ON: 50 ms faster than
M-STOP. OFF: 50 ms
slower.
POWER ON: H "H ("Hi-Z" in 10 sec.
44 P-ON I/O SW 14 V control terminal. Hi-Z
POWER OFF: Hi-Z after power OFF).
External display DATA Models without external
45 O-DATA I/O L L
terminal. display: Output "L".
8
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD703033AGF-***-3BA (X25)
Processing During Processing During
Pin Name I/O Purpose Processing Operation
Non-Operation STBY
External display CLK Models without external
46 O-CLK I/O L L
terminal. display: Output "L".
External display CE Models without external
47 O-CE I/O L L
terminal. display: Output "L".
FL and ILLUM output
48 ILL-ON I/O ON:H OFF: Hi-Z Hi-Z Hi-Z
terminal.
Destination type switching
49 TYPE0 I
port.
Destination type switching
50 TYPE1 I
port.
Destination type switching
51 TYPE2 I
port.
IC2 destination type
52 IC2TYPE0 I Default: "L".
terminal.
IC2 destination type
53 IC2TYPE1 I Default: "L".
terminal.
54 N.C O Output Open. Not used.
55 N.C O Output Open. Not used.
Muting request from CD
56 M-MUTE R I ON:L
mechanism. (R CH)
Muting request from CD
57 M-MUTE L I ON:L
mechanism. (L CH)
Positive power supply
58 BVdd -
terminal.
59 BVss - GND terminal.
Normal: "H". Reset: "L".
Reset output According to the
60 M-RST O H H
to CD mechanism. mechanism control
specification.
Stop request
61 M-STOP O STOP: L CD: H L L
to CD mechanism.
62 N.C O Output Open. Not used. L
CD Down SW detection
63 CD-SW3 I Chucking: "H". L
terminal.
CD mechanism Loading/ Stop, braking: "Hi-Z".
64 LO/EJ I/O Hi-z Hi-Z
Ejection switching. Loading: "L". Ejection: "H".
CD mechanism motor Loading, ejection,
65 MOSW O L L
power supply SW. braking: "H".
66 N.C O Output Open. Not used. L
Normal: "H". Reset &
Reset output Panel attached: "H". Panel attached: "H".
67 PAN-RESET O momentary power
to Panel uCOM. Panel detached: "L". Panel detached: "L".
down: "L".
MC-REQ/ REQ terminal to Panel
68 I/O Panel attached: "L". Hi-z Hi-Z
PANEL uCOM/Panel detection.
69 N.C O Output Open. Not used. L
Panel attached: "L". Panel attached: "L".
70 PAN5V I/O Panel 5 V control terminal.
Panel detached: "Hi-Z". Detached: "Hi-Z".
Mask mechanism
71 MASK+B O L
sub-motor output terminal.
Mask mechanism
72 MASK-B O L
sub-motor output terminal.
AD reference voltage Same timing as P-ON.
73 AVCONT O L L
control output. During operation: "H"

9
KDC-8021/M9021/X859
MICROCOMPUTER'S TERMINAL DESCRIPTION
SYSTEM MICROCOMPUTER uPD703033AGF-***-3BA (X25)
Processing During Processing During
Pin Name I/O Purpose Processing Operation
Non-Operation STBY
Positive power supply
74 Avdd -
terminal.
75 Avss - GND terminal.
A/D converter reference
76 Avref I
voltage supply terminal.
TEL muting: 1 V or less.
77 PHONE I Phone detection terminal.
NAVI muting: 2.5 V or more.
E2PROM detection E2PROM present: "H".
78 E2PROMDET I
terminal. E2PROM absent: "L".
Refer to the 01MASK
Mask mechanism
79 MASK-SW1 I mechanism position
position detection.
detection chart
Refer to the 01MASK
Mask mechanism
80 MASK-SW2 I mechanism position
position detection.
detection chart
Refer to the 01MASK
Mask mechanism
81 MASK-SW3 I mechanism position
position detection.
detection chart
Mask mechanism Mechanism present: "L".
82 MASK-DET I
detection. Mechanism absent: "H".
FM noise detection
83 NOISE I
terminal.
S-meter detection
84 S-METER I
terminal.
RDS decoder DATA Models without RDS and
85 R-DATA I
input terminal. RBDS: Connected to GND.
RDS decoder OUAL Models without RDS and
86 R-QUAL I
input terminal. RBDS: Connected to GND.
F/E IFC OUT input Station detected: 2.5 V
87 IFC-OUT I
terminal. or more.
88 CH-MUTE I Muting request from CH.
89 CH-REQH O Request output to CH. Request: "L". H H
RDS decoder CLK input Models without RDS and
90 R-CLK I
terminal. RBDS: Connected to GND.
91 CH-REQC I Request input from CH. Requested: "L".
Communication request
92 SC-REQ I
from Panel uCOM.
Loading start: "L".
Loading SW detection Take care that the logic
93 CD-SW1 I
terminal. in power OFF is different
from Flip.
12 cm disc: "L". Take care
12 cm disc detection
94 CD-SW2 I that the logic in power
SW terminal.
OFF is different from Flip.
95 N.C O Output Open. Not used. L
96 N.C O Output Open. Not used. L
DATA input terminal
97 CH-DATAC I
from CH.
DATA output terminal
98 CH-DATAH O Last state held. L
to CH.
CLK input/terminal
99 CH-CLK I/O Hi-Z
from/to CH.
DATA line from
100 SC-DATA I Hi-Z
Panel uCOM.
10
KDC-8021/M9021/X859
TEST MODE
Test Mode
1. How to enter test mode