Kenwood DM-9090 Service Manual

DISC LOADING MECHANISM
PHONES LEVEL
REC LEVEL
REC INPUT
REC MODE
/CHARA.
SET
ENTER
PHONES
STEREO MINIDISC RECORDER DM -5090
JOG DIAL
4 ¢
1
37
8 ¶
¡
MONITOR
AUTO/
MANU.
EDIT /
SPACE
DELETE
REPEAT
TITLE
SEARCHINPUT
TIME
DISPLAY
LEVEL
METER
MODE
0
TIMER
REC OFF PLAY
- ON – OFF
POWER
MIN MAX
MIN MAX
Dynamic Resolution Intensive Vector Enhancement D.R.I.V.E.
SYSTEM
CONTROL
PLAY
OUT
OPT.COAX.
REC
IN
2 COAX.1 OPT.
DIGITAL
LINE
PLAY
OUT
REC
IN
R
L
R
L
R
R
KENWOOD badge*
(B43-)
Knob*
(K27-)
Panel*
(A29-)
Front glass*
(B10-)
Knob*
(K29-)
Knob*
(K29-)
Phone jack (3P)
(E11-0190-05)
Panel*
(A60-)
Phono jack*
(E11-)
Optic receiving module
(W02-1181-05)
Power cord bushing
(J42-0083-05)
Phono jack
(E63-0120-05)
Phono jack*
(E63-)
Oscillating module
(W02-1114-05)
AC power cord*
(E30-)
Metallic cabinet*
(A01-)
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.
Illustration is DM-5090.
*Refer to parts list on page 40.
STEREO MINIDISC RECORDER
1050MD/DM-5090
DM-9090
SERVICE MANUAL
©
1997-11/B51-5387-00 (K/K) 3191
1050MD/DM-5090(K) COVER 97.11.28 2:25 AM y[W 2
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299

Kenwood DM-9090 Specifications

General

Type	MiniDisc Recorder
Sampling Frequency	44.1 kHz
Digital Inputs	Optical, Coaxial
Digital Outputs	Optical, Coaxial
Analog Inputs	RCA
Analog Outputs	RCA
Power Supply	AC 120V, 60Hz
Weight	4.5 kg
Recording Media	MiniDisc
Recording Format	ATRAC
Playback Formats	ATRAC
Recording System	ATRAC
Playback System	ATRAC
Frequency Response	5 Hz to 20 kHz
Wow and Flutter	Below measurable limits

Summary

External View

Block Diagram

Circuit Description

Mechanism Microprocessor Pin Description

Pin description for the mechanism microprocessor uPD784215GF508.

Sub Microprocessor Pin Description

Pin description for the sub microprocessor uPD784035GC.

Initialization and Control Settings

Details on unit initialization, switch controls, and key voltage matrix.

Sub Microprocessor Block Diagram

Periphery block diagram for the sub microprocessor uPD784035GC.

Test Mode Operations and Setup

Procedures for unit and mechanism test modes, including basic operations.

Microprocessor Reset

Instructions for resetting the microprocessor.

Continuous Recording Operations

Steps for entering, changing points, and terminating continuous recording mode.

Test Mode Display Functions

Explanation of display modes (MODE, error rate, address) in test mode.

Electrical Adjustment Overview

Overview and precautions for electrical adjustments and component handling.

Laser Power Adjustment

Procedure for adjusting and confirming laser power levels.

Traverse Adjustment

Steps for adjusting traverse mechanism using oscilloscope.

Focus Bias Adjustment

Procedure for adjusting focus bias and detecting C1 error.

Error Rate Confirmation

Steps for confirming CD and MO error rates.

Wiring Diagram

PC Board (Component Side View)

Exploded View (Mechanism)

Exploded View (Unit)

Parts List

Specifications