Kenwood KDC-X679 User manual

© 2004-1 PRINTED IN JAPAN
B53-0122-00 (N)764
CD RECEIVER
KDC-X679
SERVICE MANUAL
Size AA battery
(Not suplied)
Plastic cabinet assy
(A02-2732-03) Lever (D10-4589-04)
x2
Screw
(N09-6212-05)
DC cord
(E30-6294-05)
Screw set
(N99-1723-05)
Mounting hardware assy
(J21-9716-03)
Panel assy
(A64-3212-12)
Remote controller assy (RC-505)
(A70-2059-05)
CD MECHANISM EXTENSION CORD (24P) :W05-0935-00
MODEL TDF PANEL No. TDF NAME
KDC-X679 Y33-1990-60 TDF-46DX
TDF PANEL INFORMATION
Escutcheon
(B07-3083-02)

KDC-X679
2
BU
BU
SW5
BU5
SW3 F+/F-
FL+B
(X34-300)
(X16-251)
F/E
LX-BUS
PANEL-
MECHA
DXM6540W
DXM6110W
CD
INGAIN
STD
MAIN
SUB
PHONE
/NAVI
INPUT-MPX
INGAIN
+
TREBLE
BASS
VOLUME
MID
0
AUTOZER
OUT-SEL SOFT
MUTE
FRONT
REAR
NF/R
FRONT
REAR
NF
FADER
DC
DET
OFFSET
SYSTEM E'S+
E-VOL PW-IC
PRE-OUT
PRE-OUT
PRE-OUT
SP-OUT
MUTE 5V PRE
MUTE 5V PRE
MUTE 5V PRE
ACCACC-DET
REG.ANT-SW
SERVO
CD REG. P-CON
REG. BU
SW BU5V
PRE REG.
DC/DC
SW11V
FL
F+/F-
FL +B
PRE
SW5V
5V
MECHA
PANEL
DRIVER+B
5V
BU5V
ILL+B
A8V
CD-4.7V
BU-DET
ANT-CON
SYSTEM u-COM
REMO
KEY
MATRIX
u-COM
PANEL
SHIFT
LEVEL FL
SW
AC IN
MUTE
MUTE
METER
LEVEL
A2
IC2
IC14
IC5 Q56,57
Q58,59
IC1
IC3 IC1
ED1 Q3 A1
IC20 Q15,16
IC7
Q35
IC3,Q8
Q27Q25Q10,11Q7,9
Q3 Q1,2
IC8,Q17,20,23
Q36
IC15
IC17
IC16Q49,50
Q51,52
Q47,48
IC4
SW REG.
BU5
MPX
CH
CD
NAVI
CH/AUX
AC IN0
AC IN1
AC IN2
AC IN3
AC OUT
SUB
IN1 : HPF
IN2 : 2ZONE
IN3 : LPF
ACIN 3+LPF
: FREE ONLY
2ZONE
NF
R
DC
MUTE L/R
FRONT
MUTE L/R
REAR
MUTE L/R
NF
R/L
R/R
F/L
F/R
MONO 2ch
PON P-CON
PON
PON CD/MD
PON
AUDIO
PWIC
POWER
DET
PON ILL
TYPE
PANEL
FL+B
F
CD SERVO
BLOCK DIAGRAM

KDC-X679
3
●SUB-CIRCUIT UNIT (X16-2510-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 Panel µcom
IC2 3.3V Regulater The power supply of IC and VFD (Logic) which are driven by 3.3V
IC3 Remote Control IC
IC4 Buffer IC It is change into 3.3V from 5V
Q1 FL BLK SW VFD is turned on when Q1’s base level goes “H”
Q2,3 FL+B SW FL+B (VDD2) is turned on when Q2’s base level goes “H”
Q4 SW5V The power supply of IC3 is turned on when Q4’s base level goes “L”
Q6 ∇LED SW ∇LED is turned on when Q6’s base level goes “H”
Q7,9 Red LED SW RED LED is turned on when Q7’s base level goes “L”
Q8,10 Green LED SW GREEN LED is turned on when Q8’s base level goes“L”
Q11,12 Blue LED SW BLUE LED is turned on when Q11’s base level goes “L”
●ELECTRIC UNIT (X34-3000-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 System µCOM Controls FM/AM tuner, the changer, CD/MD mechanism, Panel, volume and tone.
IC2 E.Vol & N.C.MPX Controls the source, volume, tone and FM multiplex detector
IC3 A8V Ref Power Supply Output 1.27V
IC4 Power IC Amplifies the front L/R and the rear L/R to 50W or 47W maximum.
IC5 System E’s 4HPF&1Gain Controll
IC7 SW Regulator Power Supply for mp3
IC8 ±9V AVR Power Suppil for 5V Pre Out
IC10 Muting logic IC Controls logic for muting.
IC11 Reset IC “L” when detection voltage goes below 3.6V or less.
IC13 Panel mecha motor driver Panel mecha control
IC14 Level meter Buffer The signal of IC2 is sent to Panel µcom
IC15~17 5V Pre-out Amp
IC20 SW Regulator Power Supply for VFD
Q1,2 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q3,4 SW5V When Q4’base goes Hi, SW5V outputs +5V.
Q5 SW14V When Q5’2pin goes Hi, SW14V outputs 14V.
Q6,8 AUDIO8V AVR When Q6’2in goes Hi, A8V AVR outputs 8.0V.
Q7,9 SERVO+B AVR When Q9’base goes Hi, S+B AVR outputs 7.5V.
COMPONENTS DESCRIPTION
IN Panel mecha
IN1 IN2
LL WAIT
LH OPEN
HL CLOSE
HH STOP

KDC-X679
4
Ref. No. Application / Function Operation / Condition / Compatibility
Q10,11 SERVO+B AVR (Panel Mecha) When Q10’base goes Hi, S+B AVR outputs 8.5V.
Q12 SW for IC7 When Q12’base gose Lo, IC7 is turned on.
Q13,15,16 FL&ILL AVR When Q13’2pin goes Hi, ILL AVR outputs 10.5V.
Q17,18 AUDIO 10.5V AVR When Q16’base goes Hi, AVR outputs 10.5V.
Q19~21 Pre-Amp -9V AVR Q19 and 21 works as a differential amplifier, Q20 works as a driver and -9.1V is supplied
to OP Amp for Pre-out.
Q22~24 Pre-Amp +9V AVR Q22 and 24 works as a differential amplifier, Q23 works as a driver and +9.4V is supplied
to OP Amp for Pre-out.
Q25,26 P-ANT SW When Q23’base goes Hi, P-ANT SW outputs 14V.
Q27,30 P-CON SW When Q30’base goes Hi, AVR outputs 14V.
Q28,29 P-CON Protection Protect Q27 by turning on when P-CON output is grounded.
Q31 Ex Amp Control Buffer
Q32 Small lamp det SW When Q32’base goes Hi, Q32 is turned on.
Q33,34 SERGE Det. When Q33’base goes Hi, IC4 is changed into a standby state.
Q35 BU det When Q35’base gose Hi, Q27 is turned on.
Q36 ACC det When Q36’base gose Hi, Q29 is turned on.
Q37,38 Pre-out mute driver When a base gose Lo, mute driver is turned on.
Q39 Sub-out mute driver When a base gose Lo, mute driver is turned on.
Q40 AC-out mute driver When a base gose Lo, mute driver is turned on.
Q41,42 AM+B SW When Q42’base gose Hi, AM+B is out.
DSI lights when the base is “L”.
Q44 DSI Driver DSI turns off when the base is “H”.
DSI turns on and off when panel is taken off.
Q45,46 Panel 5V SW When Q46’base gose Hi, PANEL 5V is out.
Q47~52 Pre-out mute SW When a base gose Hi, Pre-out is muted.
Q56,57 AC-out mute SW When a base gose Hi, AC-out is muted.
Q58,59 Sub-out mute SW When a base gose Hi, Sub-out is muted.
Q60 Level meter mute SW When a base gose Hi, Level meter is muted.
COMPONENTS DESCRIPTION

KDC-X679
5
MICROCOMPUTER’STERMINAL DESCRIPTION
●SYSTEM MICROCOMPUTER : 30624MGPA27GP (X34 : IC1)
Pin No. Pin Name Module I/O Application
Truth Value
Processing Operation Description
Table
1~4 NC O Not used Output : L
5OPEL_REMO EXTRA I External display remote control input Not used
6BYTE - 0V GND direct connection
7CNVSS I Used when writing to system µcom Pull down
8XCIN I Sub clock input (32.768kHz)
9XCOUT I Sub clock output (32.768kHz)
10 RESET - Reset terminal L : Reset
11 XOUT - Main clock output (16.0MHz)
12 VSS -
13 XIN - Main clock input (16.0MHz)
14 VCC1 -
15 NMI I Not used
16 ES_SW EXTRA O Not used
17 NC I Not used
18 LX_REQ_S LX_M I Communication request from slave unit
19 PON_AM TUNER O AM power supply control AM operation :H, Non-AM operation : L
20 MUTE_LEVEL EXTRA O LEVEL_METER MUTE terminal Mute ON : H, Mute OFF : L
21 TUN_IFC_OUT TUNER I F/E IFC OUT input terminal H : Station detect, L : No detect
22 RDS_AFS_L TUNER I/O Constant switching at noise detect rRefer to truth value table.
23 RDS_AFS_M TUNER I/O Constant switching at noise detect rRefer to truth value table.
24,25 NC I Not used
26 PWIC_BEEP PWIC O Beep output
27 TUN_SCL TUNER I/O F/E I2C clock output terminal (MAX 400kHz)
28 TUN_SDA TUNER I/O F/E I2C data input/output terminal
29 PAN_DATA to PANEL I/O Between-panel communication (Bi-directional)
30 PAN_CLK to PANEL I/O Between-panel communication clock
31 PAN_SCREQ to PANEL I/O Between-panel communication request
termnal (Used also for PN_DET)
32 PAN_PNREQ to PANEL I Between-panel communication request terminal
AUD_SDA AUDIO I/O E-VOL I2C data input/output terminal
33 IC5_SDA AUDIO I/O IC5 data output terminal
CD_SDA CD I/O CD mechanism I2C data input/output terminal
AUD_SCL AUDIO I/O E-VOL I2C clock output terminal
34 IC5_SCL AUDIO I/O IC5 clock output terminal
CD_SCL CD I/O CD mechanism I2C clock output terminal
35 PON_PAN Power supply I/O Panel 5V control terminal ON : H, Momentary power down, Panel come
off and 11 minutes after ACC_OFF : Hi-Z

KDC-X679
6
MICROCOMPUTER’STERMINAL DESCRIPTION
Pin No. Pin Name Module I/O Application
Truth Value
Processing Operation Description
Table
36 DSI EXTRA I/O (D) SI control terminal OFF : Hi-Z, Panel come off : Pulse driven,
ILL_ON and OPEN (Power_ON) :H
37 PM_MOT1 P-MECHA OPanel motor control 1 wRefer to truth value table.
38 PM_MOT2 P-MECHA OPanel motor control 2 wRefer to truth value table.
39 EPM I FLASH EPM input terminal
40 PM_OPEN P-MECHA IPanel full open detect eRefer to truth value table.
41 PM_CLOSE P-MECHA IPanel mechanism close detect eRefer to truth value table.
42 PAN_RST to PANEL O Panel µcom reset output
Normal : H, Reset, Momentary power down, Panel
is detached and 11 minutes after ACC_OFF : L
43 PM_DET P-MECHA IPanel mechanism detect H : Function check
44 SC_CON to PANEL O Between panel Communication control POWER OFF, ACC OFF :L
(FLASH CE)
45 CD_DISC12_SW CD I CD detect terminal (12cm)
46 CD_LOS_SW CD I CD loading detect terminal
47 CD_MUTE_R CD I CD MUTE (Rch) request terminal L : Rch mute request
48 CD_MUTE_L CD I CD MUTE (Lch) request terminal L : Lch mute request
49 CD_MRST CD O CD mechanism µcom RST terminal H : Normal, L : Reset
50 CD_MSTOP CD O CD mechanism µcom stop terminal H : Mechanism µcom operation,
L : Mechanism µcom stop
51 CD_DISC8_SW CD I CD detect terminal (8cm)
52 CD_LOE_LIM_SW CD I CD detect terminal (chucking SW) H : Loading complete, L : No disk
53 CD_LOEJ CD I/O CD motor control terminal iRefer to truth value table.
54 CD_MOTOR CD O CD motor control terminal iRefer to truth value table.
55 TUN_TYPE1 TUNER I Destination setting 1 tRefer to truth value table.
56 TUN_TYPE0 TUNER I Destination setting 0 tRefer to truth value table.
57 PON_ILL Power supply I/O Key ILL power supply control ON : H, OFF : Hi-Z
58 PON_CD CD O CD WMA power supply control terminal CD : L, Other than CD : H, When RESET,
quicker than M-STOP L, Normal CD : NC
59 PON Power supply I/O Power supply control Power ON : H, Power OFF : Hi-Z
60 VCC2 -
61 COR_DET TYPE I E2PROM write request H :Write
62 VSS -
63~65 TYPE_0~TYPE_2 TYPE I Destination switching yRefer to truth value table.
66,67 NC O Not used Output : L
68 OPEL_DATA EXTRA I/O External display DATA Not used
69 OPEL_CLK EXTRA I/O External display CLK Not used
70 OPEL_CE EXTRA I/O External display control request Not used
71 EXT_CONT EXTRA O External amp control
72 P_CON Power supply I/O External amp control terminal Power ON : H, Power OFF : Hi-Z, All OFF :Hi-Z

KDC-X679
7
MICROCOMPUTER’STERMINAL DESCRIPTION
Pin No. Pin Name Module I/O Application
Truth Value
Processing Operation Description
Table
73 ANT_CONT TUNER O Power antenna control Tuner ON : H
74 ILLMI_DET EXTRA I Dimmer ILL detect L : ON, H : OFF
75 BU_DET Power supply IMomentary power down detect BU detect : L, BU no detect and Momentary
power down : H
76 ACC_DET Power supply IACC Power supply detect ACC detect : L, ACC no detect : H
77 (PWIC_SVR) PWIC O SVR electrical discharge circuit Power OFF and Momentary power down, for
5s : H and then L
78 PWIC_MUTE PWIC O Power IC MUTE terminal A ll OFF and Momentary power down : L, TEL mute : L
79 PWIC_STBY PWIC O Power IC standby control Power ON : H, Power OFF :L
80 LX_CON LX_M O Startup request to slave unit H : Slave unit ON, L :Slave unit OFF
81 RESET2 O MUTE terminal for reset Output : L
82 MUTE AUDIO O MUTE terminal ON : H, OFF : L
83 MUTE_ACOUT AUDIO I/O IC2 ACOUT MUTE Muting of CD, MD and LXBUS
84 MUTE_SUBOUT AUDIO I/O IC2 SUBOUT MUTE Muting of CD, MD and LXBUS in 2 zones
85 MUTE_PRE_R AUDIO I/O PRE_OUT MUTE Rch
M MUTE R is L :L (CD), Momentary power down : L,
Only in 2 zones and NAVI interruption, Hi-Z fixed.
86 MUTE_PRE_L AUDIO I/O PRE_OUT MUTE Lch
M MUTE R is L :L (CD), Momentary power down : L,
Only in 2 zones and NAVI interruption, Hi-Z fixed.
87 LINE_MUTE EXTRA I Line MUTE detect
TEL mute : 1V or less, NAVI mute : 2.5V or more,
1V or less and 2.5V or more : NAVI mute (J-type)
88 NC O Not used Output : L
89 PWIC_DC_DET PWIC I DC offset detect terminal
90 LX_RST LX_M O Hard reset to slave unit H : Reset, L : Normal
91 LX_MUTE LX_M I Mute request from slave unit H : Mute ON, L : Mute OFF
92 LX_REQ_M LX_M O Communication request to slave unit
93 RDS_NOISE TUNER I FM noise detect terminal
94 AVSS -
95 TUN_SMETER TUNER I S-meter input
96 VREF I Analog reference potential PON is input
97 AVCC -
98 LX_DATA_S LX_M I Data from slave unit
99 LX_DATA_M LX_M O Data to slave unit
100 LX_CLK LX_M I/O LX BUS clock

KDC-X679
8
MICROCOMPUTER’STERMINAL DESCRIPTION
●Truth ValueTable
wPanel Motor Control
OPEN CLOSE STOP WAIT
PM_MOT1 L H H L
PM_MOT2 H L H L
ePanel Mechanism Control
FULL_OPEN FULL_CLOSE OTHER
PM_OPEN H L L
PM_CLOSE H L H
tTuner Type
TUN_TYPE1 (55 pin) TUN_TYPE0 (56 pin)
Market Model L L
OEM Model 1 L H
OEM Model 2 H L
OEM Model 3 H H
y30624MGPA27GP
TYPE_2 TYPE_1 TYPE_0 Model Name Media
(65 pin) (64 pin) (63 pin)
000KDC-MP625 K WMA/MP3
001KDC-W6527/Y E WMA/MP3
010KDC-X679 K WMA/MP3
011KDC-MP858 M WMA/MP3
100f-CD07 J WMA/MP3
101KDC-MP6025 K WMA/MP3
110KMD-6527 E MD
111f-MD07 J MD
rAFS Control
RDS_AFS_M RDS_AFS_L Condition
AFS LOW L L No sound output in AF search
AFS MID L Hi-Z Sound output in AF search
AFS HIGH Hi-Z Hi-Z Normal Reception
iCD_MOTOR, CD_LOEJ
CD_MOTOR CD_LOEJ
Stop L Hi-z
Load H L
Eject H H
Brake H Hi-z
Use Prohibited L L

KDC-X679
9
MICROCOMPUTER’STERMINAL DESCRIPTION
●PANEL MICROCOMPUTER : 30622MWP111GP (X16-251 : IC1)
Pin No. Pin Name Module I/O Application Processing Operation Description
1NCONot used Output : L
2REMO REMO I Remote control signal input Pulse width DET
3GSO0 FL O FL dot section data output terminal 0 Data output
4NCONot used Output : L
5GCLK0 FL O FL dot section clock output terminal 0 2.0MHz
6BYTE µcom - Not used 0V GND direct connection
7CNVSS µcom - Used when rewriting µcom
8,9 NC O Not used Output : L
10 RESET µcom - Reset terminal L : Reset
11 XOUT µcom - Clock output
12 VSS µcom - GND terminal
13 XIN µcom - Clock input 10.000MHz
14 VCC1 µcom - Positive power supply terminal
15 NMI I Not used
16 SOURCE KEY I Source key input H : ON, L : OFF
17 EJECT KEY I Eject key input H : ON, L : OFF
18 SCCON to SYS I System µcom communication panel operation control H : Operation
19 NC O Not used Output : L
20 GCP FL O FL dot section gradation occurrence Gradation occurrence
21 NC O Not used Output : L
22 GLAT FL O FL dot section data latch output Data latch output
23 NC O Not used Output : L
24 GBK FL O FL dot section data blanking output H : Light ON, L : Light OFF
25,26 NC O Not used Output : L
27 SCL O E2PROM write clock terminal When E2P_DET is H : Input,
Other : I2C clock output terminal
28 SDA O E2PROM write terminal When E2P_DET is H : Input,
Other : I2C data output terminal
29 PN_SDA to SYS I/O System µcom communication data input/output terminal
30 PN_SCL to SYS I/O System µcom communication clock input/output terminal 100kHz
31 SC_REQ to SYS I Panel communication request input
32 PN_REQ to SYS O Panel communication request output L :Transmitting panel side data
33 GSO1 FL O FL dot section data output terminal 1 Data output
34 NC O Not used Output : L
35 GCLK1 FL I FL dot section clock input terminal GCLK0 input
36 E2P_DET I E2PROM write request H :Write
37,38 NC O Not used Output : L
39 EPM I Used when rewriting µcom
40~43 NC O Not used Output : L

KDC-X679
10
MICROCOMPUTER’STERMINAL DESCRIPTION
Pin No. Pin Name Module I/O Application Processing Operation Description
44 CE I Used when rewriting µcom
45~49 NC O Not used Output : L
50 PON_DC_DC Power supply I/O DC/DC control terminal H : FL+B ON, Hi-Z : FL+B OFF
51 BLUE_LED Power supply I/O ILL BLUE ON/OFF Hi-Z : Light OFF, L : Light ON
52 NC O Not used Output : L
53 PON Power supply I/O Power supply control terminal L : ON, Hi-Z : OFF
54 FL_VDD_ON Power supply O FL3.3V Power supply control request H : ON
55~59 NC O Not used Output : L
60 VCC2 µcom - Positive power supply terminal
61 NC O Not used Output : L
62 VSS µcom - GND terminal
63~72 NC O Not used Output : L
73 ATT_KEY KEY I ATT key input H : OFF, L : ON
74 VOL_A KEY I VOL key input Pulse width DET
75 VOL_B KEY I VOL key input Pulse width DET
76,77 NC O Not used Output : L
78 RED_LED Power supply I/O ILL RED ON/OFF Hi-Z : Light OFF, L : Light ON
79 GREEN_LED Power supply I/O ILL_GREEN ON/OFF Hi-Z : Light OFF, L : Light ON
80 TRIANGLE_LED Power supply OILL TRIANGLE ON/OFF L : Light OFF, H : Light ON
81,82 NC O Not used Output : L
83 KS3 KEY I/O Key scan output 3 Output Low, Hi-Z switching
84 KS2 KEY I/O Key scan output 2 Output Low, Hi-Z switching
85 KS1 KEY I/O Key scan output 1 Output Low, Hi-Z switching
86 KS0 KEY I/O Key scan output 0 Output Low, Hi-Z switching
87 KR3 KEY I Key return input 3
88 KR2 KEY I Key return input 2
89 KR1 KEY I Key return input 1
90 KR0 KEY I Key return input 0
91 NC O Not used Output : L
92 LEVEL_METER EXTRA I LEVEL_METER input terminal
93 NC O Not used Output : L
94 AVSS µcom - GND terminal
95 VREF_CONT µcom O VREF control terminal H : ON
96 VREF µcom I Analog reference voltage
97 AVCC µcom - Positive power supply terminal
98~100 NC O Not used Output : L