Kenwood KDC MP638U - Radio / CD User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
© 2008-3 PRINTED IN JAPAN
B53-0627-00 (N)429
SERVICE MANUAL
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
CD RECEIVER
KDC-MP638U
KDC-X692
KDC-W7141U
KDC-X7009U
KDC-X7009U
(M type)
KDC-W7041U
KDC-W7141UY
(E type)
KDC-X692
(K type)
SIZE AA BATTERY
(Not supplied)
Panel assy
(A64-4427-02)
MODEL TDF PANEL No. TDF NAME
KDC-X692 Y33-2940-62 TDF-87DX
KDC-MP638U Y33-2940-63 TDF-MP87D
KDC-W7041U/W7141UY Y33-2940-65 TDF-W7041U
KDC-X7009U Y33-2940-67 TDF-X7009U
CD MECHANISM EXTENSIONCORD (30P) : E39-1014-05
DC cord (K,M type)
(E30-6428-05)
DC cord (E type)
(E30-6671-05)
Escutcheon
(B07-3235-03): KDC-X692
(B07-3238-03): K,E,M type
Mounting hardware assy
(J22-0011-03)
Remote controller assy
(A70-2085-05): except KDC-W7041U
Lever
(D10-7012-04) x2
Carrying case
(W01-1664-05): KDC-X692
(W01-1710-05): K,E type
Compact disc
(W01-1723-05)
Screw set (K,M type)
(N99-1757-15)
Screw set (K,M type)
(N99-1730-35)
Panel assy
(A64-4429-02): KDC-W7041U
(A64-4430-02): KDC-W7141UY
RC-547
Panel assy
(A64-4426-02)
Plastic cabinet assy (M type)
(A02-2757-03)
TDF SPARE-PANEL
Cover (KDC-X692)
(F19-1475-04)
Screw set (KDC-X692)
(N99-1790-05)
KDC-MP638U
(K type)
Panel assy
(A64-4432-02)

2
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
BLOCK DIAGRAM
E2PROM
FST
FM/AM
CD/USB
AUX
RST
CH
SAOUT
SAIN
PON
SW14
PON ILL
PON D5
PON ILL
SW VBU
PON ILL
PON PA
PANEL
(X34-579)
SUB PANEL
(X16- )
(X15-119)
AM+B
SW5V
A8V
A8V
AGC
E-VOL
PRE OUT
AUX IN
IC480
BU5V
SW5V
BU5V
BACK UP
BU5V
OPEL DISP
P-CON
ANT-CON
EXT AMP
ACC DET
DIMMER
B.U DET
BU5V
ILL+B
SW 14V
A8V
SW 5V
P CON
ANT CON
EXT.AMP.CON
DIMMER
ACC
BACK UP
LINE MUTE
SP OUT
(FL/FR/RL/RR)
D 3.3V
SW 5V
D 2.5V
FL+B
FL
SW 3.3V
RESET SW
FLASH ROM
KEY ILL
BU5V
SW5V
A8V
FL+B
ILL+B
ILL+B
(F/R SW)
WIRED REMO
KEY
TEL MUTE
KEY MATRIX
REMO.
LX BUS
SW 20V
USB
PAN5V
CD SERVO+B
BU5V
D3.3V
USB
SOC
D3.3V
IC4
IC700
IC500
IC450
Q400
Q371,377
Q370,372-376
Q143
Q120
Q150
Q180
Q122
Q13
Q22
Q10
IC60
Q70
Q50
IC11
IC10
IC1
IC6 ED1
Q13
IC8IC7
IC20
IC602
IC600
IC340
IC530
Q20
IC510
MUTE
SW
MUTE
PRE
MUTE
DRIVER POWER
IC
F/E
(FST)
RDS
DECODER
ROM CORR
SYSTEM
u-COM
EJECT
SW
RESET
IC
ENCODER
ROTARY
ROM CORR
PANEL
u-COM
SHIFT
LEVEL LEVEL
SHIFT
SHIFT
LEVEL
FLIP
DET LEVEL
SHIFT
BU5V
CON.
FL+B
FDC
SW14
+B
SERVO
Q30
SERVO+B
FDC
IC80
USB 5V
PAN5V
SW
HISIDE
IC300
VBUS
Q70
DC/DC
(FL) FL+B
SW
Q45
FDC
PAN5V
Q40
FDC
PAN5V
BVUS

3
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
BLOCK DIAGRAM
DPU1
CD PLAYER UNIT (X32-6130-00) BOARD
MOTHER
(X34- )
EF
A
C
B
TR COIL
FO COIL
APC
IC4
16.934MHz
CLOCK
IC3
LOADING &
MOTOR
DRIVER
MOTOR
SPINDLE
S2
S1
S3
SLED
MOTOR
DM1
DM2
X1
Q1
RF AMP
SERVO
MP3 DECODER
WMA DECODER
1M bit SRAM
PROCESSOR
AAC DECODER
+
+
+
+
+
CR FILTER
CR FILTER
REVERSAL
CIRCUIT
Q13
BU1.5V REG
IC5
IC6
IC11
SW3.3V REG
SW1.5V REG
LOADING &
VREF
12EJE-SW
LOS-SW
LOE-SW
MOTOR
LO/EJ
A.GND
A8V
A,B,C,E,F
TR OUT
FO OUT
DM OUT
FM OUT
A3.3V
LD
SIGNAL
S.GND
S7.5V
FO OUT
TR OUT
DM OUT
FM OUT
DRV MUTE
SO
SRAMSTB
SI
BUCK
CCE
PIO0
SRAMSTB
BUCK
CCE
PIO0
SO
SI
MRST MRST
C88,R82
C87,R83
R-ch
L-ch L-ch
R-ch
ZDET MUTE L/R
D.GND
D GND BU1.5V SW1.5V SW3.3V
AGND
BU5V
P.ON
PD
BSIF LRCK
BSIF ST REQ
BSIF GATE
BSIF BCK
BSIF DATA
BSIF ST REQ
BSIF GATE
BSIF DATA
BSIF BCK
BSIF LRCK
8EJE-SW

4
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
COMPONENTS DESCRIPTION
● ELECTRIC UNIT (X34-579x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC10 Audio8V Ref Power Supply Output 1.27V.
IC20 Regulator Power supply for BU3.3V.
IC60 Switching Regulator Power supply for 65V FL+B. (to PANEL)
IC80 Switching Regulator Power supply for D5V. (to USB/PANEL)
IC300 Hi-side SW Detection of USB Over Current & On/Off SW
IC340 RDS decoder IC RDBS & RDS ecoder. (only K & E type)
IC350 OPAMP Vref of IC480
IC450 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.
IC480 Eelectrical Volume & Source Selecter Controls the source, volume, and tone.
IC500 System μ-com Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
IC510 Reset IC “L” when detection voltage goes below 3.6V or less.
IC520 EEPROM Rom correction
IC530 Muting logic IC Controls logic for muting.
IC600 Logic IC Level Shift (3.3V→5V)
IC602 Logic IC Level Shift (5V→3.3V)
IC700 Sub μ-com USB/CD mechanism control
IC751 EEPROM Rom correction
IC752 iPod Authentication Coprocessor iPod Authentication
Q10 Audio8V AVR When Q11&Q12’ go ON, A8V AVR outputs 8.0V.
Q11,12 Audio8V AVR SW When Q12’ Base goes Hi, Supply current to IC10.
Q13,14 Audio8V AVR SW When Q14’ Base goes Hi, Q13 are ON.
Q20,21 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q22,23 PON5V When Q23’ base goes Hi, PON5V outputs +5V.
Q30 Servo +B SW When Q31’ go ON, Servo +B outputs 8V.
Q31 Servo +B SW When Q13’ go ON, Q30 are ON
Q40,41 PANEL +5V SW When Q41’ base gose Hi, PANEL +5V is outputs.
Q45,46 FDC SW When PON-ILL (μ-CON) goes ON, AVR outputs 5V. (FL Filament)
Q50,51 Illumination+B AVR When Q52&Q53’ go ON, AVR outputs 10V.
Q52,53 Illumination+B SW When PON-ILL (μ-CON) goes ON, Hi, Q52 is ON.
Q70,71 SW15V When Q13’ go ON, The voltage appears. (~15V)
Q80 Change of Oscillation Frequency When Q80 is turned ON, the oscillation frequency at IC80 in the switching regulator
changes from 1MHz to 2.45MHz.
Q120 B.U Detected SW When Q120’ base gose Hi, B.U voltage is detected.
Q122 ACC Detect SW When Q122’ base gose Hi, Acc voltage is detected.
Q123 Surge Detect SW When Q123’ base goes Hi, Surge voltage is detected.
Q140,143 P-CON SW When Q140’ base goes Hi, AVR outputs 14V.
Q141,142 P-CON Protect Protect Q142 by turning on when P-CON output is grounded
Q150,151 Power Antenna SW When Q151’ base goes Hi, power antenna switch outputs 14V.
Q180 Small-lamp Detect SW When Q180’ base goes Hi, Small-lamp is detected.
Q350,351 4VPRE+B When Q353’ go ON, 4VPRE+B is outputs. (~12V)

5
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
COMPONENTS DESCRIPTION
Ref. No. Application / Function Operation / Condition / Compatibility
Q352 4VPRE+B Protect When 4VPRE+B is overcurrent, Q352 turn Q350 off.
Q353,354 4VPRE+B SW When Q354’ Base goes Hi, Q353 is ON.
Q370,372~376 Pre-out mute SW When a base gose Hi, Pre-out is set to mute.
Q371,377 Pre-out mute driver When a base gose Lo, mute driver is turned on.
Q400,401 AM+B SW When Q401’ base gose Hi, AM+B is outputs.
Q500,501 FL+B SW When PON-ILL (μ-CON) goes ON, FL+B outputs 65V.
Q650 X15 LED SW When DSI Port LOW, LED of X15 are ON
Q702,703 3.3V_SW_for_IC700 (flash_type) When base of Q702 is “H”, 3.3V_On.
Q704 Decoder SRAM standby control
Buffer When base of Q704 is “L”, SRAM_STBY.
Q705 CD “LOE_LIM” SW_Buffer When base of Q705 is “H”, Loading_End.
●SWITCH UNIT (X16-625x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 ROM IC Graphics data included
IC3 ROM CORRECTION (EEP_ROM) For program correcting emergency (EEP_ROM)
IC4 PANEL μ-COM FL Vdd Supply (ON/OFF) Encoder Key Led SW (ON/OFF) is controlled by IC4
IC6 REMOTE CONTROL IC Remote control receiver
IC8 BUFFER IC It is change into 5V from 3.3V
IC10 3.3 REGULATOR The power supply for 3.3V
Q1~5 LED DRIVER It is controlled by IC4
Q6 POWER ON/OFF SWITCH OF IC1 It is controlled by IC4
Q11,13 POWER ON/OFF SWITCH OF ED1
(65V) It is controlled by IC4
Q15 LED DRIVER It is controlled by IC4
●CD PLAYER UNIT (X32-6130-00)
Ref. No. Application / Function Operation / Condition / Compatibility
IC3 4ch BTL Driver Driver for focusing & tracking coil, driver for sled & spindle motor, and operation for
disc loading & ejection.
IC4 Servo DSP with built-in Audio DAC With built-in MP3/WMA/AAC decoder and 1M-bit-SRAM.
IC5 D1.5V REG. Power supply for digital 1.5V.
IC6 D3.3V REG. Power supply for digital 3.3V.
IC11 BU1.5V REG. Power supply for back-up 1.5V.
Q1 APC (Auto Power Control) Drives LD (Laser Diode).
Q13 Inverter Inverts ZDET signal.
D2 Laser Diode Protection Prevents reverse bias which is applied to laser. Laser destruction prevention.
D3,4 Static Electricity Countermeasure Prevents malfunction by static electricity.

6
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
MICROCOMPUTER’S TERMINAL DESCRIPTION
●SYSTEM MICROCOMPUTER 30624MGPB77GP (X34: IC500)
Pin No. Pin Name I/O Application Truth
Value Table
Processing / Operation / Description
1 WIRED_REMO I Remote controller input Pulse width detection
2 RDS_QUAL I RDS decoder QUAL input terminal
2 NC O Not used. (In models without RDS) Output L fixed
3 S_SYS_DATA O System μ-com →SOC data 400k
4 S_SOC_DATA I SOC →System μ-com data 400k
5 S_SOC_CLK I Host is SOC. CLK from SOC 400k
6 BYTE
7 CNVSS
8 XCIN 32,768Hz
9 XCOUT 32,768Hz
10 RESET
11 XOUT 12MHz
12 VSS
13 XIN 12MHz
14 VCC1
15 NMI I Not used
16 RDS_CLK I RDS clock input terminal
16 NC O Not used. (In models without RDS) Output L fixed
17 FLIP_DET I FLIP panel open detection
H: Open, L: Close
Shut down power to panel system in synchronous
with opening the panel. Audio shall be kept on
18 SRC_KEY I Source key input H: OFF, L: ON
19 RDS_DATA I RDS decoder DATA input terminal
19 NC O Not used. (In models without RDS) Output L fixed
20 PANEL_SW_DET I FLIP panel detach detection
H: Panel attached, L: Panel detached
Enter PowOFF condition simultaneously with
detection
21 EJECT_KEY I Eject key input H: OFF, L: ON
22 PANRST O Panel reset terminal H: Normal, L: Reset
23 DSI (EJECT_ILL) I/O DSI control terminal L: Turns on, Hi-Z: Turns off
24 NC O Not used (SW_REG frequency setup terminal 2) Output L fixed
25 F_SEL1 I/O SW_REG frequency setup terminal 1 tH: For AM, Hi-Z: For other than AM
26 PWIC_BEEP O Beep output 2kHz 1kHz
27 TUN_SCL I/O F/E I2C clock input/output terminal MAX 400k
28 TUN_SDA I/O F/E I2C data input/output terminal MAX 400k
29 PAN_SYS_DATA O System μ-com →Panel data UART MAX500k
30 PAN_PAN_DATA I Panel →System μ-com data UART MAX500k
31 PAN_SYS_REQ O System μ-com →Panel communication request
32 PAN_PAN_REQ I Panel →System μ-com communication request
33,34 NC O Not used Output L fixed
35 NC (D5V_DIS) O Not used Output L fixed

7
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
Pin No. Pin Name I/O Application Truth
Value Table
Processing / Operation / Description
36 PON_ILL I/O
Panel LED
FL filament power supply
FL bias power supply control
H: ON, Hi-Z: OFF
Turned OFF when the display is black out.
Turned OFF when panel is dismounted/opened.
37 NC O Not used Output L fixed
38 PON_PANEL I/O Power supply for panel μ-com
Required for panel authentication
H: ON, Hi-Z: OFF
Turn OFF when panel is dismounted/opened or
when power is off.
39 ROMCOR_DET I ROM correction writing-in request H: Can re-write ROM (ROM correction)(I2C is open)
39 EPM I EPM input terminal for re-writing ROM. ROM is
re-writable when the input is “L” at the boot up.
40 CD_MOTOR O CD motor control terminal wRefer to the truth value table
41 CD_LOE_LIM_SW I CD detection terminal (Chucking detection) H: Loading completed, L: No disc is found.
42 CD_LOS_SW I CD loading detection terminal L: Ejection completed.
43 CD_DISC12_SW I CD disc detection terminal (12cm) L: 12cm disc
44 PAN_SC_CON O Panel operation control terminal
CE when the system μ-com is re-written H: In normal condition, L: Stop the panel.
45 CD_LOEJ I/O CD motor control terminal wRefer to the truth value table
46 S_SOC_REQ I SOC →System μ-com communication request
47 SOC_STOP O SOC stop terminal H: Normal, L: Stop SOC.
48 SOC_RST O SOC reset terminal H: Normal, L: Reset
49 S_SYS_REQ O System μ-com →SOC communication request
50 SOC_MUTE I SOC mute request L: MUTE request, H: In normal condition
51 PON_D5V I/O 5V power supply control terminal for FL filament,
panel, and USB. H: ON, Hi-Z: OFF
52 PON I/O Power supply control terminal H: ON, Hi-Z: OFF
53 OEM_DISP_DATA I/O External display DATA External display
53 NC O Not used (Model without OEM_DISP) Output L fixed
54 OEM_DISP_CLK I/O External display CLK External display
54 NC O Not used (Model without OEM_DISP) Output L fixed
55 OEM_DISP_CE I/O External display control request External display
55 NC O Not used (Model without OEM_DISP) Output L fixed
56 P_CON I/O PCON control terminal POWER ON: H, POWER OFF: Hi-Z
STBY source: Hi-Z
57 ANT_CON O ANTCON control terminal TUNER source: H, POWER OFF: L
STBY source: L
58 NC O Not used Output L fixed
59 ILLUMI_DET I Dimmer illumi detection L: ON, H: OFF
60 VCC2
61 MUTE_0 O IC-2 FRONT MUTE control L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
62 VSS
63 MUTE_1 O IC-2 REAR MUTE control L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
MICROCOMPUTER’S TERMINAL DESCRIPTION

8
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
Pin No. Pin Name I/O Application Truth
Value Table
Processing / Operation / Description
64 MUTE_2 O IC-2 SW MUTE control
L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
Shall be used together with MUTE_PRE_SW
IC2 shock noise measure
65 LINE_MUTE I Line mute detection
TEL MUTE: 1V or less, NAVI MUTE: 2.5V or higher
66 NC (SA_IN) O Not used Output L fixed
67 NC (SA_RST) O Not used Output L fixed
68 NC (SA_CLK) O Not used Output L fixed
69 NC (MUTE_SA) O Not used Output L fixed
70 PWIC_DC_DET I DC offset detection terminal
71 ACC_DET I ACC detection L: ACC found, H: ACC not found
72 BU_DET I BU detection L: BU found, H: When No BU
Reduction of power, and Over voltage
73 LX_REQ_S I Communication request from slave unit
74 MUTE_AFS I/O IC-2 MUTE_C control
AFS MUTE
L: Mute ON, Independent setup of time
constant 0.5ms, Hi-Z: While in normal
74 NC I Not used (For other type than E-TYPE) Input Hi-Z fixed
75 SDA/EVOL_SDA I/O System μ-com →IC-2 data output Communication speed 200-400k
75 SDA/E2P_SDA I/O I2C data for ROM correction Communication speed 200-400k
76 SCL/EVOL_SCL I/O System μ-com →IC-2 CLK output Communication speed 200-400k
76 SCL/E2P_SCL I/O I2C clock for ROM correction Communication speed 200-400k
77 PWIC_MUTE O Power IC MUTE terminal L: While STANDBY source, momentary power
down, L: While TEL MUTE
78 PWIC_STBY O Power IC standby terminal POWER ON: H, POWER OFF: L
79 LX_REQ_M O Communication request to slave unit
80 LX_MUTE I MUTE request from slave unit H: Mute ON, L: Mute OFF
81 LX_CON O Start-up request to slave unit H: Slave unit ON, L: Slave unit OFF
82 LX_RST O Hardware-reset to slave unit H: RST, L: Normal
83 MUTE_PRE_FR O External PREOUT_MUTE F/R “L” when Obit, or momentary power down
84 MUTE_PRE_SW O External PREOUT_MUTE SUB
MUTE_2 shock noise measure
“L” when Obit, or momentary power down
Shall be used in addition to MUTE_2.
85 PON_AM I/O AM+B power supply control terminal H: ON when AM is being received.
Hi-z: OFF in other condition.
86 TUN_IFC_OUT I F/E IFC OUT input terminal H: Station is found., L: No station is found.
87 TUN_SMETER I S meter voltage detection terminal
88 RDS_NOISE I FM noise voltage detection terminal
88 NC O Not used. (In models without RDS) Output L fixed
89 RDS_AFS_M I/O Time constant switching when noise is detected eL: During AF search, Hi-Z: In normal condition
89 NC O Not used. (In models without RDS) Output L fixed
90 TYPE_1 I A/D 5 pattern q
91 TYPE_2 I A/D 5 pattern q
92 G_Y_OUT I Detection of Y direction movement of G analyzer
92 NC O Not used. (In models without G antenna) Output L fixed
MICROCOMPUTER’S TERMINAL DESCRIPTION

9
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
Pin No. Pin Name I/O Application Truth
Value Table
Processing / Operation / Description
93 G_X_OUT I Detection of X direction movement of G analyzer
93 NC O Not used. (In models without G antenna) Output L fixed
94 AVSS
95 NC O Not used Output L fixed
96 VREF A/D analog reference voltage
97 AVCC
98 LX_DATA_S I Data from slave unit
99 LX_DATA_M O Data to slave unit
100 LX_CLK I/O LX BUS clock r
qDestination setting
TYPE_2 (91) TYPE_1 (90) Destination
1 1 KDC-MP738U [∗]
1 2 KDC-X792
1 3 KDC-X692
1 4 SKDCMP9090U(Visteon)
1 5 KDC-MP638U
2 1 KDC-X8009U
22
23
24
2 5 KDC-X7009U
3 1 U737 (J)
32
3 3 (Reserve)
34
35
4 1 KDC-W7541UY
42
43
44
4 5 KDC-W7141UY
5 1 KDC-W7541U
52
53
54
5 5 KDC-W7041U
(Note 1) When there is no destination defined, the unit operates as
the model for [∗].
(Note 2) The voltage is set to higher value.
(Note 3) When the system is set up as “Reserve”, it reads the data
for setting up the destination from E2PROM. Set up for the
destination. In addition, change of the destination shall be
possible from MENU in the test mode.
R540 R530 R529 R528
TYPE1
(90)
1 - - x 22K
2 - - 47k 22k
3 - - 22k 22k
4 - - 22k 47k
5 - - 22K x
TYPE2
(91)
1 x 22K - -
2 47k 22k - -
3 22k 22k - -
4 22k 47k - -
5 22K x - -
MICROCOMPUTER’S TERMINAL DESCRIPTION

10
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
w CD_MOTOR, CD_LOEJ
CD_MOTOR CD_LOEJ
Standby L L
Eject H H
Load H L
Brake H Hi-z
eAFS process
RDS_AFS_M Status
AFS LOW L No sound output AF search
AFS MID L There is sound output in AF search.
AFS HIGH Hi-Z Normal reception
r CH_CLK
AM10k AM9k
122.4 116.5 111.1 106.2 101.7 122.4 116.5 111.1 106.2 101.7
530 1170-1180 860-930 1050-1060 540-660 522-558 864-990 1071-1116 1260-1314 567-657
670-780 1390-1410 1070-1160 790-850 666-801 1125-1215 1323-1350 1449-1512 810-855
940-1040 1280-1380 1590-1680 1224-1251 1359-1413 1521-1629 999-1062
1190-1270 1530-1580 1422-1440
1420-1520
1690-1700
• Other than AM: 122 [kHz]
tF_SEL
ALL-Type
FSEL1 Receiving frequency
Hi-Z Other than AM
H For AM
MICROCOMPUTER’S TERMINAL DESCRIPTION