Kenwood DM-3090 Service Manual

DM-3090
1 RF1 I
I
I
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
O
I
O
O
O
O
–
–
–
–
–
–
–
–
–
–
I
–
I
O
O
O
O
–
O
O
RF signal input terminal 1 Input of RF signal output of pickup
2 RF2 RF signal input terminal 2 Input of RF signal output of pickup
3 RF3 RF signal input terminal 3 Input of RF signal output of pickup
4 RF4 RF signal input terminal 4 Input of RF signal output of pickup
5 REFI Reference voltage amp. input terminal
6 REFO Reference voltage amp. output terminal
7 RFADD RF1 to 4 resistance addition output terminal
8 TCGI Track cross detection signal amp. input terminal for groove
9 AIN Servo signal amp. (focus servo system) inversion input terminal
10 BIN Servo signal amp. (focus servo system) inversion input terminal
11 EIN Servo signal amp. (tracking servo system) inversion input terminal
12 FIN Servo signal amp. (tracking servo system) inversion input terminal
13 BIAS Bias input terminal
14 AVCC Analog section power terminal
15* VSTBY Logic signal output terminal (STBY signal inversion signal is output.)
16* XDISC Logic signal output terminal (DISC signal inversion signal is output.)
17* XSGAIN Logic signal output terminal (SGAIN signal inversion signal is output.)
18 AGND Analog section GND terminal
19 DGND Digital section GND terminal
20 DTEMP Chip temperature detection terminal
21 LATCH Latch signal input terminal
22 CLOCK Clock signal input terminal
23 DATA Serial data input terminal
24 DVCC Digital section power terminal
25 FOUT Servo signal amp. (tracking servo system) output terminal
26 EOUT Servo signal amp. (tracking servo system) output terminal
27 BOUT Servo signal amp. (focus servo system) output terminal
28 AOUT Servo signal amp. (focus servo system) output terminal
29 TCGO Track cross detection signal amp. output terminal for groove
30 WBO Comparator output terminal for ADIP signal binary-coding
31 22KI Comparator input terminal for ADIP signal binary-coding
32 22KO ADIP signal HPF amp. output terminal
33 ADLPFO ADIP signal LPF amp. output terminal
34* NC NC
35 ADIPO ADIP signal primp. output terminal
36 ADIPI ADIP signal AGC amp. output terminal
37 ADAGC ADIP signal AGC smoothing capacitor connection terminal
38 ADAGI ADIP signal AGC amp. input terminal
39 RF2-1 RF1 and RF2 difference signal
40 EFMO RF signal primp. output terminal
41* WFMI RF signal AGC amp. output terminal
42 AVCC Analog section power terminal
43 AGND Analog section GND terminal
44 EFMAGC EFM signal AGC smoothing capacitor connection terminal
45 EFMAGI EFM signal AGC amp. output terminal
46* ATTR Pins 47 and 48 output signal attenuation terminal
47 GOUT Output of signal of RF1+RF2-RF3-RF4 for groove
48 POUT Rf1 to 4 resistance addition output for pit
IC1101 VHiiR3R55//-1:RF Signal Control (IR3R55)
Pin No.
Terminal Name I/O
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
CIRCUIT DESCRIPTION
9
DM-3090(K) COVER 97.11.29 0:20 AM y[W 38

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)