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Kenwood DM-3090 Service Manual

Kenwood DM-3090
48 pages
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In compliance with Federal Regulations, following are
reproductions of labels on, or inside the product relating to
laser product safety,
KENWOOD-Corp. certifies this equipment conforms to
DHHS Regulation No.21 CFR 1040.10, Chapter 1,
Subchapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM.
*Refer to parts list on page 49.
STEREO MINIDISC RECORDER
DM-3090
SERVICE MANUAL
© 1997-11/B51-5396-00 (K/K) 1812
MULTI CONTROL
TIME DISPLAY
DISPLAY/CHARAC.
TRACK/EDIT
ON/STAND BY
STEREO MINIDISC RECORDER
TIMER/
DELETE
ENTER
REC REC LEVEL
0 10
PHONES LEVEL
MIN MAX
PHONES
R
L
R
L
PLAY
OUT
REC
IN
DIGITAL
LINE
2
REC IN
1
REC INPLAY OUT
OPT.
RESET
KENWOOD badge
(B43-0302-04)
Front glass
(B10-2457-08)
Front panel
(A60-1370-08)
Knob (JOG)
(K29-6946-08)
Knob (REC/HP)
(K29-6947-08)
AC power cord bushing
(J42-0338-08)
AC power cord *
(E30-)
Optical digital output
(W02-2643-08)
Switch (RESET)
(S68-0091-08)
Analogue output terminal
(E63-1031-08)
Optical digital input
(W02-2643-08)
Knob (POWER)
(K27-2261-08)
Knob
(K27-2262-08)
Head phone jack
(E11-0345-08)
Panel
(A29-0898-08)
Digital input terminal
(E63-1032-08)
DM-3090(K) COVER 97.11.29 0:18 AM y[W 2
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Kenwood DM-3090 Specifications

Digital Audio Performance IconDigital Audio Performance
frequency response (playback mode)8 Hz ~ 20 kHz, ± 1 dB
signal to noise ratio (playback mode)More than 100 dB
wow & flutterLess than unmeasurable limit
Analog Specifications IconAnalog Specifications
analog input sensitivity / input impedance0.5V / 22 kΩ or more
analog output level/output impedance2.0 V / Less than 2 kΩ
headphone output15 mW/32 Ω load
Digital Input/Output IconDigital Input/Output
digital input coaxial0.5 Vp-p / 75 Ω
digital input optical- 15 dBm ~ - 21 dBm
digital output optical- 15 dBm ~ - 21 dBm
General Specifications IconGeneral Specifications
power consumption17 W
dimensions width440 mm (17 - 5 / 16”)
dimensions height94 mm (3 - 11 / 16”)
dimensions depth300 mm (11 - 13 / 16”)
Weight IconWeight
weight3.55 kg (7.9 lb)

Summary

Controls

Front Panel Controls

Identifies and explains the functions of the front panel controls and indicators.

Remote Control Unit

Details the buttons and functions of the remote control unit for operating the device.

Disassembly for Repair

MD Mechanism Section

Provides step-by-step instructions for removing main parts of the MD mechanism.

Block Diagram

Circuit Description

IC1101 RF Signal Control Circuit

Describes the pin functions and operations of the RF signal control IC.

IC1201 ENDEC/ATRAC Circuit

Details the pin functions and operations of the ENDEC/ATRAC processor IC.

IC1401 MD System Microcomputer Circuit

Explains the pin functions and operations of the MD system microcomputer.

IC901 System Control Microcomputer Circuit

Details the pin functions and operations of the system control microcomputer.

Troubleshooting

Troubleshooting Error Displays

Lists error messages, their meanings, and corrective actions for common issues.

Mechanism Error Explanations

Details specific mechanism errors and their corresponding troubleshooting steps.

Troubleshooting Operation Failures

Provides diagnostic flowcharts for various operational failures like power or playback issues.

Adjustment

Adjustment Preparation

Outlines prerequisites and test discs required for calibration procedures.

Test Mode Operation

Explains how to enter and navigate the device's test and adjustment modes.

Automatic Adjustment Modes

Covers AUTO pre-adjustment and AUTO adjustment modes for device calibration.

RESULT Adjustment Modes

Details the RESULT sub-mode and final adjustment mode for detailed calibration.

Manual Adjustment Modes

Explains manual adjustment procedures for low reflection and high reflection discs.

Specialized Test Modes

Describes TEST-PLAY and TEST-REC modes for specific functional testing.

Mechanism Adjustment Procedures

Covers optical pickup grating and jitter adjustments for mechanism calibration.

Parts Descriptions

Exploded View

Exploded View (Mechanism)

Illustrates the mechanical components and their assembly for the MD mechanism.

Exploded View (Unit)

Shows the overall assembly of the device unit, including front panel and main chassis parts.

Parts List

Specifications

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