KENWOOD KDC-MV6521 Service Manual

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Service Manual for KENWOOD KDC-MV6521, downloadable as a PDF file.

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© 2002-1 PRINTED IN JAPAN
B51-7893-00 (N) 3415
Antenna adaptor
(T90-0523/0534-05)
: KDC-MV6521
Screw set
(N99-1656-05)
Screw set
(N99-1719-05)
: KDC-MPV619
: KDC-MPV7019
: KDC-MPV7020
Lever
(D10-4589-04)x2
Mounting
hardware assy
(J21-9716-03)
Escutcheon
(B07-3055-02)
Plastic
cabinet assy
(A02-1486-13)
Remote
controller assy
(A70-2025-05)
: KDC-MPV619
: KDC-MPV7019
Remote
controller assy
(A70-2026-05)
: KDC-MPV7020
DC cord
(E30-4940-05)
: KDC-MPV619
: KDC-MPV7019
: KDC-MPV7020
DC cord
(E30-4958-05)
: KDC-MV6521
Front glass
(B10-4168-01)
Panel assy
(A64-2590-02)
KDC-MPV619
Front glass
(B10-4174-01)
Panel assy
(A64-2596-02)
KDC-MPV7020
Front glass
(B10-4169-01)
Panel assy
(A64-2591-02)
KDC-MPV7019
Front glass
(B10-4178-01)
Panel assy
(A64-2600-02)
KDC-MV6521
CD RECEIVER
KDC-MPV619/MPV7019
KDC-MPV7020/MV6521
SERVICE MANUAL
· This service manual does not include information on the CD mechanism assembly (exploded view, parts list,
schematic diagram or mechanism operation description).
For such information, please refer to the CD mechanism assembly service manual (X92-4460-0x : B51-7891-00).
background image
© 2002-1 PRINTED IN JAPAN
B51-7893-00 (N) 3415
Antenna adaptor
(T90-0523/0534-05)
: KDC-MV6521
Screw set
(N99-1656-05)
Screw set
(N99-1719-05)
: KDC-MPV619
: KDC-MPV7019
: KDC-MPV7020
Lever
(D10-4589-04)x2
Mounting
hardware assy
(J21-9716-03)
Escutcheon
(B07-3055-02)
Plastic
cabinet assy
(A02-1486-13)
Remote
controller assy
(A70-2025-05)
: KDC-MPV619
: KDC-MPV7019
Remote
controller assy
(A70-2026-05)
: KDC-MPV7020
DC cord
(E30-4940-05)
: KDC-MPV619
: KDC-MPV7019
: KDC-MPV7020
DC cord
(E30-4958-05)
: KDC-MV6521
Front glass
(B10-4168-01)
Panel assy
(A64-2590-02)
KDC-MPV619
Front glass
(B10-4174-01)
Panel assy
(A64-2596-02)
KDC-MPV7020
Front glass
(B10-4169-01)
Panel assy
(A64-2591-02)
KDC-MPV7019
Front glass
(B10-4178-01)
Panel assy
(A64-2600-02)
KDC-MV6521
CD RECEIVER
KDC-MPV619/MPV7019
KDC-MPV7020/MV6521
SERVICE MANUAL
· This service manual does not include information on the CD mechanism assembly (exploded view, parts list,
schematic diagram or mechanism operation description).
For such information, please refer to the CD mechanism assembly service manual (X92-4460-0x : B51-7891-00).
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KDC-MPV619/MPV7019/MPV7020/MV6521
2
BLOCK
DIAGRAM
CH
CD MECHA
F/E
FM+B
PLL+B
AM+B
BUFF
E-VOL
SYSTEM
MI-COM
DECODER
RDS
MP3
NORMAL
SW
ANALOG
ANALOG
SW
AUX/CH
SW
AUX
WIRED
OEM DISP
RST IC
DET
FLIP
LCD (POSI)
MATRIX
KEY
G/R SW
RST SW
REMO ON
BACKLIGHT
LCD
V-ILL
DRIVER
LCD
REMO
D/A
CONVERTER
GUIDE
ILL
SW
OPEN
OUT
REMO/
BU5V
SW5V
SERVO
+B
PANEL
2WAY MUTE
ACC DET
DIMMER
TEL-MUTE
ACC
DIMMER
POWER IC
SP OUT
MUTE
PRE OUT (FRONT)
PRE OUT (REAR)
MUTE
PRE OUT (NF/REAR)
MUTE
DRIVER
OP AMP
SWITCHED
PROTECTION
THERMAL
NOISE
BUFFER
5V
BU DET
SW14V
A8V
CD
MACHA+B
ILLUMI
+B
(for MP3)
EJECT ILL/DSI
(SW AND LED)
EJECT KEY
X89-252
X89-251
BACK UP
ANT-CON
ANT-CON
P-CON
P-CON
Q45,47
Q46,48
IC7
(E) TYPE
IC1
& N.C. MPX
IC2
Q52
(E) TYPE
Q9,10
IC9
IC10
(M) TYPE
(K,E)
TYPE
IC8
Q54
S1
AVR
LCD
ED1
Q50-64
Q3,4
IC2
Q6
IC3
IC1
Q5
Q16,17
Q18
Q14,15
IC11,Q51
Q19-22
Q33
Q34
Q26
Q13
Q11,12
Q55
Q28,31
Q27,29,30,32
(E) TYPE
P-CON
ANT-CON
(K,M) TYPE
(E) TYPE
IC6
Q43
Q7,8
IC4
Q5,6
Q1-4
IC3,
DATA C
CH-CON
DATA H
REQ H
RST
CLK
REQ C
CD MECHA+B
SERVO+B
PLL DATA
PLL CLK
M STOP
M RST
SW4
MUTE R
MUTE L
LO/EJ
MOSW
SW2
SW3
SW1
S-METER
IFC OUT
SW5V
3
P
A
NEL
DET
GUIDE
ILL
MP IN
AFS
LEVEL
RDDA
FM
AM
A 8V
(for MP3)
BU5V
A8V
3
2
2
3
10
7
3
SW5V
10
SDA
SCL
AUDIO OUT
7
A8V
BACK UP
3
2
O-CLK
O-DATA
O-CE
REMO
RESET
BU5V
MUTE
DRIVER
PANEL5V
PANEL5V
RGB
CONTR
OL
3
2
5
CD
AM+B
FM+B
S-METER
RDCK
RQUAL
BU5V
2
5
BU5V
FLIP
DET
L
D
ATA
S
L
CE
L
CLK
L
D
ATA
L
L-INH
V
-ILL
D
A
T
A
V
-ILL
CLK
EJECT
EJECT
ILLUMI/DSI
ILL
ON
CD
MECHA+B
SW5V
(E) TYPE
(K,M) TYPE
CD (MP3,NORMAL)
3600mV
CHANGER
3600mV
3600mV
1800mV
600mV
FM
AM
1372mV
855mV
3600mV
2
2
2
BU5V
8
2
2
2
QUAL
S MUTE
REAR L/R
FRONT L/R
AFS
NOISE
N/F SW
PRE MUTE
N/F MUTE
P MUTE
MUTE
BEEP
BU5V
MUTE
DRIVER
P-ON
PANEL5V
SW5V
AUX SW
CH-AUX
MODE
PRE OUT OUTPUT VOLTAGE
DIMMER
PHONE
ACC DET
BU DET
251mV (E)
470mV (K,M)
230mV
1200mV
(MP3,NORMAL)
1200mV
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KDC-MPV619/MPV7019/MPV7020/MV6521
3
q SWITCH UNIT (X16-1620-10/X16-1652-70)
COMPONENTS DESCRIPTION
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
LC75808W
LCD driver with key matrix
IC2
RS-171
Remote control sensor IC
IC3
M62333FP
D/A converter
The brightness control of red, green and blue colour
Q1
DTA114EUA or KRA302 Key permission SW
For the key scanning start and the key detection SW
Q3
2SD2114K
Key illumination red SW
When a base goes Hi, RED LEDs are turned on.
Q4
2SD2114K
Key illumination green SW
When a base goes Hi, GREEN LEDs are turned on.
Q5
2SC4081
VLCD AVR
For LCD driver IC
Q6
DTA114EUA or KRA302 5V SW
While a base goes Lo, PAN 5V is supplied to the remote
control sensor IC and D/A converter IC.
Q50
2SC4081
V-I converter
Current driver for blue LED
Q51
2SC4081
V-I converter
Current driver for green LED
Q52
2SC4081
V-I converter
Current driver for red LED
Q53
2SC4081
V-I converter
Current driver for blue LED
Q54
2SC4081
V-I converter
Current driver for green LED
Q55
2SC4081
V-I converter
Current driver for red LED
Q56
2SC4081
V-I converter
Current driver for blue LED
Q57
2SC4081
V-I converter
Current driver for green LED
Q58
2SC4081
V-I converter
Current driver for red LED
Q59
2SC4081
V-I converter
Current driver for blue LED
Q60
2SC4081
V-I converter
Current driver for green LED
Q61
2SC4081
V-I converter
Current driver for red LED
Q62
2SC4081
Buffer
Control voltage buffer for red LEDs brightness
Q63
2SC4081
Buffer
Control voltage buffer for green LEDs brightness
Q64
2SC4081
Buffer
Control voltage buffer for blue LEDs brightness
UPD703030GFA03
IC1
or UPD703033GFA05
System MI-COM.
or UPD703033GFA13
IC2
TDA7407D
E.VOL & N.C.MPX IC
IC3
HD74HC02FP
Mute logic
2-input NOR x 4
or TC74HC02AF
IC4
TA8273H
Power IC
IC6
NJM2123V-TE2
Switched Op. Amp.
IC7
SAA6581T
RDS decoder
IC8
S-80837ANNP
Reset IC
When BU 5V voltage is less than 3.7V, IC outputs Lo.
IC9
TC4066BF(N)
AUX input SW
When 5 pin, 12 pin and 13 pin terminals go Hi, AUX's inputs
are selected.
IC10
TC4066BF(N)
Changer input SW
When 5 pin, 12 pin and 13 pin terminals go Hi, Changer's
inputs are selected.
IC11
SI-8050JD
CD+5V AVR
DC/DC converter
Q1
DTC143TUA
Audio mute SW
When a base goes Hi, Front R Ch. pre-out is muted.
Q2
DTC143TUA
Audio mute SW
When a base goes Hi, Front L Ch. pre-out is muted.
Q3
DTC143TUA
Audio mute SW
When a base goes Hi, Rear R Ch. pre-out is muted.
Q4
DTC143TUA
Audio mute SW
When a base goes Hi, Rear L Ch. pre-out is muted.
Q5
2SD2114K
Audio mute SW
When a base goes Hi, NON-F R Ch. pre-out is muted.
Q6
2SD2114K
Audio mute SW
When a base goes Hi, NON-F L Ch. pre-out is muted.
q ELECTRIC UNIT (X25-9190-XX/X25-9202-70)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
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KDC-MPV619/MPV7019/MPV7020/MV6521
4
COMPONENTS DESCRIPTION
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
Q7
DTA124EUA or KRA303 Mute driver for pre-out mute SW
When a base goes Lo, Q7 is turned on for driving NON-F mute SW.
Q8
DTA124EUA or KRA303 Mute driver for pre-out mute SW
When a base goes Lo, Q8 is turned on for driving Front and
Rear mute SW.
Q9
DTC144EUA or UN5213
AUX/Changer selection SW
AUX selected : (Q9,Q10)=(ON,ON)
Q10
DTA124EUA or KRA303
Changer selected : (Q9,Q10)=(OFF,OFF)
Q11
2SC4081 or 2SD1819A
BU 5V AVR
While BACKUP is applied, BU 5V AVR outputs +5V.
Q12
2SA2057
Q11 and Q12 are inverted Darlington connection.
Q13
2SA1576A or 2SB1218A SW 5V
While a base goes Lo, SW 5V is supplied to the
microprocessor peripheral circuits.
Q14
2SC4081 or 2SD1819A
When Q14's base goes Hi, Q15 is turned on, and A.+8V AVR
A.+8V AVR
outputs +8.3V.
Q15
2SA2057
Q14 and Q15 are inverted Darlington connection.
Q16
DTC124EUA or UN5212
A.+8V AVR and SERVO +B AVR ON/OFF control
Q17
DTA124EUA or KRA303
SW14V
While Q16's base goes Hi, Q17 is turned on, and A.+8V AVR
and SERVO +B AVR are working.
Q18
2SD2375
SERVO +B AVR
When Q18's base goes Hi, SERVO +B AVR outputs +7.6V.
Q19
DTC124EUA or UN5212
ILL +B AVR ON/OFF control
Q20
DTA124EUA or KRA303
ILL +B AVR SW
While Q19's base goes Hi, Q20 is turned on, and ILL +B AVR
is working.
Q21
2SB1184
While Q22's base goes Hi, Q21 is turned on, and AVR
Q22
2SC4081 or 2SD1819A
ILL +B AVR
outputs +10.7V.
Q21 and Q22 are inverted Darlington connection.
Q26
DTC144EUA or UN5213 Small lamp detection SW
When vehicle small lamps turn on, Q26's base goes Hi, and
Q26 is turned on .
Q27
DTC114YUA or UN5214
P-CON SW
When Q27's base goes Hi, Q32 is turned on .
Q32
2SB1277(Q,R) or 2SB1434
Works during POWER ON mode.
Q29
DTA124EUA or KRA303 P-CON. protection inhibit SW
Prevents Q30 tuning ON during start-up after power ON.
Q30
2SA1576A or 2SB1218A P-CON. protection SW
Protect Q32 by turning ON when P-CON output is grounded.
Q28
DTC114YUA or UN5214
P-ANT SW
When Q28's base goes Hi, Q31 is turned on.
Q31
2SB1277(Q,R) or 2SB1434
Works during FM/AM reception mode or RDS reception mode.
While BACKUP is applied, a base goes Hi, and Q33 is turned on.
Q33
2SC4081 or 2SD1819A BU detection SW
When momentary power down has detected, a base goes Lo,
and Q33 is turned off.
Q34
2SC4081 or 2SD1819A ACC detection SW
While ACC is applied, a base goes Hi, and Q34 is turned on.
Q42
DTC124EUA or UN5212 E. VOL. mute SW
When BU detection SW or MI-COM.'s mute is working, a base
goes Hi, and Q42 is turned on.
Q43
DTC143TUA
Noise buffer
Q45
DTC124EUA or UN5212
When Q45's base goes Hi, Q47 is turned on, and A.+8V is
Q47
2SB1277(Q,R) or 2SB1434
FM+B SW
supplied to the F/E. Works during FM reception mode or RDS
reception mode.
Q46
DTC124EUA or UN5212
AM+B SW
When Q46's base goes Hi, Q48 is turned on, and A.+8V is
Q48
2SB1277(Q,R) or 2SB1434
supplied to the F/E. Works during AM reception mode.
Q51
2SC4081 or 2SD1819A CD+5V AVR SW
When a base goes Hi, CD+5V AVR is working.
Q52
DTC143TUA
Composite signal buffer
Q53
DTA114YUA or UN5114 EJECT illumination/DSI SW
When a base goes Lo, Q53 is turned on.
Q54
DTA114YUA or UN5114 Guide illumination SW
When a base goes Lo, Q54 is turned on.
Q55
2SA1576A or 2SB1218A Panel 5V SW
When a base goes Lo, Q55 is turned on.
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KDC-MPV619/MPV7019/MPV7020/MV6521
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
q IC1 (ELECTRIC UNIT : X25-9190-XX/X25-9202-70)
Pin No.
Pin name
I/O
Description
Processing Operation
1
L-DATAS
O
Data line to LCD driver
2
L-CLK
O
Clock output to LCD driver
3
PLL-DATA
I/O
Data input/output terminal with F/E
4
PLL-CLK
I/O
Clock output to F/E
5
AM+B
I/O
AM+B control
Hi: During AM reception
6
FM+B
I/O
FM+B control
Hi: During FM reception,
Hi: During FM reception if with RDS, RDBS
7
CH-CON
O
Changer control output
Lo: Standby mode, Hi: Operation mode
8
CH-RST
O
Reset output to changers
: Reset
9
EVDD
-
Positive power supply connection terminal
Connected to BU 5V lines.
10
EVSS
-
Ground connection terminal
Connected to GND lines.
11
AFS
O
Noise detection time constant switching terminal Hi: During FM reception, Lo: During FM seek or AF search
12
BEEP
O
BEEP sound output
13
REMO
I
Data input from the remote control light
sensor or wired remote control
14
AUX SW
I/O
CH/AUX inputs selector terminal
Hi: AUX inputs, Lo: CH inputs
Lo: No AUX inputs model
Hi: Rear/N-F pre-outs are selected to Front output.
15
N/F SW
O
N-F selector terminal
Lo: Rear/N-F pre-outs are selected to Rear output.
Lo: No Rear/N-F pre-outs model
16
IC2-SDA
I/O
Data line with IC2,CD mechanism MI-COM.
17
IC2-SCL
I/O
Clock line with IC2,CD mechanism MI-COM.
18
PRE-MUTE
I/O
Pre-out mute control terminal
Lo: When momentary power down detected,
when M-MUTE input is Lo.
Lo: When momentary power down detected, N-F pre-
19
N/F-MUTE
O
N-F pre-out mute control terminal
outputs selecting or OFF, when M-MUTE inputs is Lo.
Lo: No Rear/N-F pre-outputs model
20
DIMMER-CON
O
Dimmer control output
Not used (N.C.)
21
TEST
-
Test terminal
Not used (Connected to GND lines)
22
SVR
O
Power IC SVR control output
Not used (N.C.)
23
P-MUTE
O
Power IC mute output
Lo: ALL OFF model, POWER OFF mode, TEL MUTE on
24
P-STBY
O
Power IC STBY control output
Hi: Power IC on, ALL OFF mode, Lo: Power IC off
25
MUTE
O
Mute control output
Lo: Mute off, Open: Mute on
26
SW5V
I/O
SW5V control terminal
Lo: SW5V on, Hi-Z: SW5V off
27
BU DET
I
Momentary power down detection input
Hi: When momentary power down detected or BU OFF
Lo: BU ON
28
ACC DET
I
ACC detection terminal
Hi: ACC OFF, Lo: ACC ON
29
N.C
O
Not used (N.C.)
30
DIMMER
I
Small lights detection input
Lo: During vehicle small lamps turn on.
31
N.C
O
Not used (N.C.)
32
P-CON
I/O
Power control output
Hi-Z: POWER OFF mode, ALL OFF mode,
Hi: POWER ON mode
33
ANT-CON
O
Antenna control output
Hi: During TUNER mode, TI reception mode, last FM mode
34
RESET
I
Reset input terminal
Lo: System reset
35
XT1
I
Sub clock resonator connection terminal
Clock count during POWER OFF mode
36
XT2
-
Sub clock resonator connection terminal
37
REGC
-
Capacitor connection terminal for regulator
inside microprocessor
38
X2
-
Main clock resonator connection terminal
Oscillation: POWER ON mode, Oscillation stop:
POWER OFF mode or momentary power down detected
39
X1
I
Main clock resonator connection terminal
40
VSS
-
Ground connection terminal
Connected to GND lines.
41
VDD
-
Positive power supply connection terminal
Connected to BU 5V lines.
42
CLKOUT
O
Internal system clock output
Not used (N.C.)
43
CD MECH +B
I/O
MP3 CD mechanism power supply control output Lo: Power supply on, Hi-Z: Power supply off
44
P-ON
I/O
SW14V control terminal
Lo: POWER OFF mode, Hi: POWER ON mode
45
O-DATA
I/O
Data line with the external display device
Lo: The model without the external display device
46
O-CLK
I/O
Clock line with the external display device
Lo: The model without the external display device
47
O-CE
I/O
CE line with the external display device
Lo: The model without the external display device

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