Kenwood DM-3090 Service Manual

Figure 28BLOCK DIAGRAM (1/2)
D6.5/4.75 ~ 5.25V
MECHAN1SM
6.5/4.75~5.25V
D3.2V
SYSCLK
DVDD
DVDD
D3.2V
DIGITAL
3.2V
D3.2V
D4.3V
D4.3V
D3.2V
D4.3V
D3.2V
BACKUP
VOLTAGE
REGULATOR
POWER
IC1402
S29294A
E
2
PROM
IC1601
M56758FP
5-CH
MOTOR
DRIVER
BACKUP
MD MICRO COMPUTER
IC1401
IX0227AW
MD SYSTEM
MICRO
COMPUTER
DIGIN(EIAJ)
PDOWN
DIGOUT(EIAJ)
GND
GND
1
2
4
3
BCLK
MUTE
DFS0
DADATA
LRCLK
ADDATA
DFS1
LOAD IN
RESET
MD-ST
DSCK
SERCH
1
2
24
23
22
21
20
19
18
17
16
15
14
4
5
6
7
8
9
13
10
11
12
3
D.GND
D.GND
D.GND
D.GND
DSTB
MDDATA
KDATA
4M
DRAM
ENDEC
ATRAC
IC1201
LR37648
OSCILLATOR
XL1201
(33.8688MHz)
SW1956
SW1955
SW1954
SW1953
SW1952
Q1251~Q1254
MD
RECORDING HEAD
M901
SPINDLE MOTOR
M902
SLED MOTOR
M903
LOADING SWITCH
RECSWITCH
PLAYSWITCH
LEAD INSWITCH
A–BSIGNALE–FSIGNAL
RF1 ~ RF4SIGNAL
HEAD DRIVE
SIGNAL
IC1251
IC1101
IR3R55
RF
SIGNAL
PROCESSOR
LOADING MOTOR
HEAD UP/DOWN
M
M
DIRECT SWITCH
WRITE PRO
M
LASER DIODE
MONITOR DIODE
RF4
RF3
RF2
RF1
LIGHT
RECEIVING
SECTION
ERROR
SIGNAL
LIGHT
RECEIVING
SECTION
RF
F
A
B
E
FOCUS
TRACKING
PICK UP UNIT
IC1202
IX2474AF
CNP1904
CNP1902
IC1906
AND GATE TC7ST08F
IC1907
CLOCK GENERATOR TC92ASF
IC1990
INVERTOR 74AC04FS
IC1916
AND GATE
74VHC08F
DM-3090
7
BLOCK DIAGRAM
DM-3090(K) COVER 97.11.29 0:19 AM y[W 14

Kenwood DM-3090 Specifications

Digital Audio Performance

frequency response (playback mode)	8 Hz ~ 20 kHz, ± 1 dB
signal to noise ratio (playback mode)	More than 100 dB
wow & flutter	Less than unmeasurable limit

Analog Specifications

analog input sensitivity / input impedance	0.5V / 22 kΩ or more
analog output level/output impedance	2.0 V / Less than 2 kΩ
headphone output	15 mW/32 Ω load

Digital Input/Output

digital input coaxial	0.5 Vp-p / 75 Ω
digital input optical	- 15 dBm ~ - 21 dBm
digital output optical	- 15 dBm ~ - 21 dBm

General Specifications

power consumption	17 W
dimensions width	440 mm (17 - 5 / 16”)
dimensions height	94 mm (3 - 11 / 16”)
dimensions depth	300 mm (11 - 13 / 16”)

Weight

weight	3.55 kg (7.9 lb)