KENWOOD KMD-44 Service Manual

Cover page of KENWOOD KMD-44 Service Manual

Service Manual for KENWOOD KMD-44, downloadable as a PDF file.

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© 2001-2 PRINTED IN JAPAN
B51-7737-00 (N) 1529
MD RECEIVER
KMD-44
SERVICE MANUAL
MDLP
LOUD
SCAN
ROM
REP
M.ROM
D.SCN
AUTO
AME CLK
NAME.S
DISC
MENU
45Wx4
KMD-44
PWR
SRC
DISC
OFF
AM
FM
AUD
CD MD-CHANGER CONTROL
MD RECEIVER
Plastic cabinet assy
(A02-1486-13)
Screw set
(N99-1610-15)
DC cord
(E30-4783-05)
Stay
(J54-0606-04)
Screw set
(N99-1632-05)
Lever
(D10-3031-04)x2
Mounting hardware assy
(J21-9491-13)
Front glass
(B10-4030-01)
Escutcheon
(B07-2181-02)
Panel assy
(A64-2261-02)
background image
© 2001-2 PRINTED IN JAPAN
B51-7737-00 (N) 1529
MD RECEIVER
KMD-44
SERVICE MANUAL
MDLP
LOUD
SCAN
ROM
REP
M.ROM
D.SCN
AUTO
AME CLK
NAME.S
DISC
MENU
45Wx4
KMD-44
PWR
SRC
DISC
OFF
AM
FM
AUD
CD MD-CHANGER CONTROL
MD RECEIVER
Plastic cabinet assy
(A02-1486-13)
Screw set
(N99-1610-15)
DC cord
(E30-4783-05)
Stay
(J54-0606-04)
Screw set
(N99-1632-05)
Lever
(D10-3031-04)x2
Mounting hardware assy
(J21-9491-13)
Front glass
(B10-4030-01)
Escutcheon
(B07-2181-02)
Panel assy
(A64-2261-02)
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KMD-44
2
BLOCK LEVEL DIAGRAM
SDA
SCL
AFS
SCL
SDA
SD
S-METER
REMO
L DATAS
L CLK
L CE
L DATAL
L INH
MD +B
SW 5V
P-ON
ILL ON
LOE
SW
EJ
LO
LOS
SW
M
ST
OP
M
RST
A
MUTE
M
SD
A
M
SCL
P
ANEL
D
ATA
C
REQ
H
D
ATA
H
CLK
MUTE
REQ
C
AM
+B
FM
+B
MUTE
VDD
B
U
DET
.
A
CC
DET
.
PHONE
P-ANT
P-CON
LOS
SW
LOE
SW
LO
EJ
M
SD
A
A
MUTE
M
RST
M
ST
OP
M
SCL
AUDIO
BU 5V
S 5.0V
AUDIO 8V
MUTE
AUDIO
FM,AM
CH
SCL
OUT
MD
VDD
SDA
AFS
VDD
PLL +B
FM +B
AM +B
SCL
IF2 +B
AUDIO
IF1 +B
S-METER
SD
SDA
CLK
REQ
C
MUTE
D
ATA
H
D
ATA
C
REQ
H
AUDIO
SW 5V
8V
P-ANT
P-CON
TEL MUTE
ACC
BACK UP
PRE OUT
SP OUT
AUDIO
BU 14V
3529mV
3529mV
588mV
1819mV
3795mV
3795mV
380mV
1200mV
1200mV
1200mV
724mV
1200mV
170mV
166mV
1692mV(J,K)
547mV(J,K)
BU 5V
Q1,2
Q10
Q11-15
IC6
IC3
Q7-9
IC1
IC8
IC1
IC2
IC2
Q25-28
IC4
Q17,18
AVR
SW-REG
S 5.0V
ILLUM +B
AVR
AVR
AUDIO 8V
u-COM
MD MECHA
P-ANT
P-CON
ACC DET.
BU DET.
TEL MUTE
MUTE
PRE OUT
E-VOL
F/E
FM +B
AM+B
POWER IC
CD/MD CH
KEY MATRIX
WITH
LCD DRIVER
SW 5V
REMOCON
LCD
PANAEL
MD MECHA
CD-CH
AM
FM
E-VOL
PRE OUT
ATT
PRE OUT LEVEL
ANT
5V
REG
REAR
LEVEL DIAGRAM
BLOCK DIAGRAM
background image
1
2
4
5
6
7
8
9
3
15
14
I
J
A
B
C
D
E
F
11
12
22
23
25
41
42
19
APC
APCREF
EQADJ
3T
ADJ
WBLADJ
FZC
RF
AUX1
AUX2
PEAK
BOTTOM
ABCD
FE
VC
SWDT
SCLK
XLAT
FOCONT
114
113
84
85
77
76
112
111
SPFD
SPRD
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
25
28
5
34
15
21
20
MNT0
MNT1
MNT2
MNT3
XINT
SQSY
SENS
SRDT
SCLK
SWDT
XLAT
XRST
44
45
46
62
18
20
19
17
16
FZC
XINT
SQSY
SENS
SRDT
SCLK
SWDT
XLAT
XRST
12
56
23
11
15
13
14
43
36
59
60
LDON
SDMUTE
LIMIT
SW
P-ON
AMUTE
MSD
A
MSCL
MST
OP
MRST
TYPE
1
TYPE
2
33
7
8
HOT
ESDA
ESCL
20
19
17
16
29
30
23
22
26
25
24
32
33
TRK+
TRK-
FCS+
FCS-
SLED+
SLED-
SPDL+
SPDL-
VC
VREF0
VCC2
VCC1
LOAD
EJECT
10
11
12
13
6
7
8
9
28
27
3
14
5
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
SPFD
SPRD
REG IN
REG OUT
ENREG
LOAD
EJECT
11
10
8
13
12
19
18
14
17
4
5
1
20
21
6
7
A8V
L-CH
R-CH
MRST
MSTOP
MSCL (IIC BUS)
MSDA
AMUTE
BU5V
S5V
S5V
LOE-SW
LOS-SW
DET-SW
LOAD
EJECT
36
30
29
31
34
35
37
33
38
47
46
48
40
10
28
26
32
17
18
20
27
16
41
40
MORF
RFO
AUX 1
FOCONT
XSTBY
ADFG
22.58MHz
6
7
8
35
16
14
13
10
9
11
104
105
106
107
102
84
93
80
81
82
83
67
73
72
71
70
85
92
91
5
11
13
3
1
12
2
10
6
4
8.38MHz
4
MUTE
1
MUTE
2
1
2
MUTE
3
36
CH1,2
CH3
CH4
2
1
67
SW+5V
DAVDD
AUDIO +B
JITTER
RECORD IN
VC
TE
SE
VC
VC
VC
VC
PD
LD
STBY
TO CH5 OP
S+B
SW+5V
S5V
+3.3V
+2.5V
6
5
BU+5V
1.2V rms
1KHz 0dB
SW+5V
TO SERVO DRIVER
BU+5V
ILCC
LDON
RF AMP
RF AGC & EQ
RF AMP
CXA2523AR
BPF
P-P
PEAK &
BOTTOM
ABCD AMP
IV AMP
IV AMP
CVB
AMP
TEMP
VICCONV
ERROR AMP
FOCUS
AT
AMP
BPF
TRACKING
ERROR AMP
SERIAL
PARALLEL
DECODER
BALANCE
E-F
FIL
TER
PLL
DECODER
ACIRC
EFM
MEMORY
RESISTANT
SHOCK
CONTROLLER
DYNAMIC RAM
ATRAC3
ATRAC/
DECODER
DIGITAL
FILTER
DIGITAL
AUDIO
I/F
CONVERTER
D/A
POST FILTER
CONTROL
MONITOR
ANALOG
MUX
ADIP
DEMODULATOR
DECODER
SPINDLE
SERVO
GENERATOR
PWM
APC
DSP
SERVO
CONVERTER
A/D
CLOCK
GENERATOR
AUTO
SEQUENCER
I/F
CPU
PROCESSOR
SUBCODE
TC74HCT7007AF
MECHA u-COM
UPD780076YGK
CH2
DRIVER
CH1
DRIVER
DRIVER
CH4
DRIVER
CH3
VREF
DRIVER
CH5
NJM4565MD
LPF
SW+8V
A3.3V
REG.
LIMIT SW
LOE-SW
LOS-SW
DET-SW
ATRAC/ATRAC3 DECODER
DET.
REFLECT
APC
CB
DA
F
E
J
I
DETECTOR
TRACKING
COIL
FOCUS
COIL
M
SLED MOTOR
SPINDLE MOTOR
M
LOADING/EJECT MOTOR
M
THERMISTER
EEPROM
BR24C02FV-W
256
8BIT
S-817A25ANB
SW+5V
EFM/ACIRC DECODER
SHOCK PROOF MEMORY CONTROLLER
DIGITAL SERVO PROCESSOR
DIGITAL SIGNAL PROCESSOR
1M-WORD
4BIT DYNAMIC RAM
DIGITAL FILTER. D/A CONVERTER
CDX2667R
FOCUS/TRACKING COIL DRIVER
SPINDLE/SLED MOTOR DRIVER
LA6572
LOADING/EJECT MOTOR DRIVER
IC1
Q1
IC4
Q3
REG.
2.5V
IC2
IC11
IC9
IC5
IC8
LP2982-3.3
Q10
IC12
Q13
Q7
MOTOR ASS'Y
KMS-242B
OPTICAL PICKUP BLOCK
MOTOR BLOCK
X33 UNIT
34
KMD-44
KMD-44
BLOCK DIAGRAM (MD)
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5
KMD-44
COMPONENTS DESCRIPTION
Ref. No.
Component name
Application/Function
Operation/Condition/Compatibility
IC1
LC75808W
LCD driver with key-matrix
IC2
RS-171
Remote control light sensor
Q1
DTA114EK or UN2111
Key-matrix permission SW
Ready on key-matrix, ON when the base goes "Lo".
Q2
2SD2114K
Illumination SW(Red)
ON when the base goes "Hi".
Q3
2SD2114K
Illumination SW(Green)
On when the base goes "Hi".
Q4
2SC2412K or 2SD601A
LCD AVR
Ref. No.
Component name
Application/Function
Operation/Condition/Compatibility
IC1
UPD784216GF531
System MI-COM.
IC2
TDA7407D
E-VOL. & N.C. MPX
IC3
M5237ML
AVR IC
AVR IC is combined with Q5, and it works as the error
detection, the driver.
IC4
TDA7386
Power IC
IC6
LM2595S-ADJ
MD SERVO AVR
A DC/DC Converter wiht the ON/OFF function.
IC7
S-80830ANNP
Reset IC
"L" : detection voltage below 3.0V
IC8
HD74HC27FP
Mute logic
3 input NOR gate x3
IC10
TDA7479D
RDS decoder
Q1
2SC4081 or 2SD1819A
BU 5V AVR
Inverted darlington connection
Q2
2SB1548(P)or 2SB1655(E, F)
On during BU applied.
Q3
DTA124EUA or UN5112
Audio 8V AVR ON/OFF control
Q4
DTC144EK or UN2213
Audio 8V AVR ON/OFF SW
Q3 is turned ON when Q4's base goes "Hi".
or KRC104S
Q5
2SB1548(P)or 2SB1655(E, F) Audio 8V AVR
Output voltage 8.3V
Q7
DTC144EUA or UN5213
Q8
DTA124EUA or UN5112
Illumination AVR
AVR output is ON when Q7's base goes "Hi".
Q9
2SD1760
Q10
2SA1037K
SW 5V
ON when the base goes "Lo".
Q13
2SB1277(Q, R)
Q16
DTC114YK or UN2214
P-CON SW
Q13 is turned ON when Q16's base goes "Hi".
or KRC107S
Q14
2SA1037K
Protect Q13 by turning ON when P-CON output is grounded.
Q15
DTA124EK or UN2112
P-CON protection
Prevents Q14 turning ON during start-up after power ON.
or KRA103S
Q17
2SC2412K or 2SD601A
BU detection
ON when the base goes "Hi" during BU applied.
(Momentary power down detection)
Q18
2SC2412K or 2SD601A
ACC detection
ON when the base goes "Hi"during ACC applied.
Q19
DTA124EK or UN2112
Mute driver for Audio mute SW
ON when the base goes "Lo".
or KRA103S
Q20
DTC144EK or UN2213
E-VOL. mute SW
E-VOL. is muted when the base goes "Hi".
or KRC104S
Q21, 22 DTC143TK or UN2216
Audio mute SW
Audio pre-outs are muted when the base goes "Hi".
Q23
DTC114YK or UN2214
SVR SW
POWER IC RESET is activated when the base goes "Hi".
Q24
DTA114YUAor UN5114
Panel detection SW
ON when the base goes "Lo" during the panel closed.
Q25
DTC124EK or UN2212
or KRC103S
FM+B SW
Q26 is turned ON when Q25's base goes "Hi".
Q26
2SB1277(Q,R)
ON during FM reception
Q27
DTC124EK or UN2212
Q28 is turned ON when Q27's base goes "Hi".
or KRC103S
AM+B SW
Q28
2SB1277(Q,R)
ON during AM reception
Q29
2SC4081 or 2SD1819A
Composite signal output buffer
Q30
2SC4081 or 2SD1819A
Noise buffer
Q33
DTC144EK or UN2213
RESET SW
System RESET is activated when the panel reset SW
or KRC104S
is pushed
Q34
2SC4081 or 2SD1819A
DSI driver
ON when the base goes "Hi".
GSWITCH UNIT (X13-9700-11)
GELECTRIC UNIT (X25-8840-11)
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6
KMD-44
COMPONENTS DESCRIPTION
Ref. No.
Application/Function
Operation/Condition/Compatibility
RF amplifier (Pit-groove switching, AGC, EQ Gain switching, I-V Amp,
IC1
RF Matrix Amplifier for MD
light amount signal output, Peak-hold output, Bottom-hold output, FE output,
TE output, SE output, ADIP dual-value output, Vref output, APC PD amplifier,
FZC generation comparator
EFM decoding, EFM digital PLL, ACIRC decoding, Automatic LINK processing
IC2
Digital signal processor for MD
ADIP decoder, Memory control, Digital servo, (focus, tracking thread, spindle
CLV), 1 bit D/A, ATRAC/ATRAC3 decoding, 4M(1Mx4) DRAM Analog post filter
IC3
+2.5V regulator
Power supply for 2.5V system of IC2
IC4
5chBTL servo driver
Various actuator, Motor drive, Disk loading, Eject motor driver, +3.3V regulatore
IC5
low-pass filter
3-times active filter
IC6
3.3v regulator
D/A audio+B
IC7
CMOS buffer
3.3V/5.0V level shift
IC8
Mechanism micon
Servo control, Memory, control, System control, Various interfaces
IC9
E2PROM
Servo coefficient, Servo adjustment data backup memory
Q1
APC
IC1, IC2 APC ON and ON while Q2 is OFF
Q2
LD SW
ON when laser is OFF (when micro com LDON "L")
Q3
Detection of disk reflection amount
ON when focus is passed during UP search
Q4
+3.3V regular
ON when SW+5V "H" (when Q7 is ON)
Q5
A+8V SW
ON when Q6 is ON
Q6
SW for SW+8V
ON when SW+5V "H" (When Q7 is ON)
Q7
PON (SW+5V)
ON when Pin 11 of IC8 is "L"
GMD Unit (X33-3120-00)

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