DS-90/90A Feb. 2000
1
SERVICE NOTES
First Edition
Issued by RJA
● System
2 Way Bi-Amplified Monitor
● Enclosure
Bass-reflex type
● Cabinet
3/4" MDF, Baffle: 1" MDF
● LF Driver
160 mm (6-1/2") Foamed
polypropylene cone type, mag-
netically shielded
● HF Driver
25 mm (1") soft dome type,
magnetically shielded
● Frequency Response
48 Hz to 20 kHz (+/-3 dB)
● Crossover Frequency
2.6 kHz (active fourth order)
● LF Amplifier Power
60 W
● HF Amplifier Power
30 W
--- Analog in ------------------------
● Input Sensitivity
0 dBu (0.775 Vrms)
● Input Impedance
20k ohm (Balanced/Unbal-
anced)
--- Digital in -------------------------
● Format
Conformity with S/P DIF
● Sample Rate
25 k Hz to 55 k Hz (de-empha-
sis: automatic detection of ON/
OFF)
● D/A Converter
24 bit
------------------------------------------
● Controls
INPUT LEVEL Knob
LF TRIM Knob (60 Hz, +/-3
dB)
HF TRIM Knob (10 kHz, +/-3
dB)
INPUT SELECT SW
(Analog In/Digital In)
ASSIGN SW (Right/L+R/Left)
DIGITAL INPUT SELECT SW
(Coaxial/Optical)
POWER SW
● Indicators
POWER
DIGITAL IN
● Connectors
ANALOG INPUT(XLR/TRS
PHONE, Balanced/Unbalanced)
DIGITAL INPUT (Optical)
DIGITAL INPUT (Coaxial)
DIGITAL THRU OUT (Coax-
ial)
● Power Supply
AC117 V, AC230 V or AC240 V
● Power Consumption
80 W
● Dimensions
*DS-90
228.6 (W) x 330.2 (D) x 371.5
(H) mm
9 (W) x 13 (D) x 14-5/8 (H)
inches
*DS-90A
228.6 (W) x 381.0 (D) x 371.5
(H) mm
9 (W) x 15 (D) x 14-5/8 (H)
inches
● Weight
*DS-90
13.5 kg / 29 lbs. 13 oz.
*DS-90A
15 kg / 33 lbs. 2 oz.
● Accessories
*DS-90
Owner's Manual English
(17055161)
*DS-90A
Owner's Manual English
(17055213)
AC Cord 117 V (G3497134)
AC Cord 230 VD (G3497135)
AC Cord 230 VE (G3497136)
AC Cord 240 VA (G3497137)
SPECIFICATIONS
Copyright © 2000 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION.
17059965
Printed in Japan AA00 (DP)
DS-90/90A
BI-AMP MONITOR
TABLE OF CONTENTS
SPECIFICATIONS ....................................................................................
LOCATION OF CONTROLS.....................................................................
EXPLODED VIEW ....................................................................................
BLOCK DIAGRAM ....................................................................................
PARTS LIST .............................................................................................
CIRCUIT BOARD (DA BOARD) ...............................................................
CIRCUIT DIAGRAM (DA BOARD) ...........................................................
CIRCUIT BOARD (ANALOG SHEET) ......................................................
CIRCUIT DIAGRAM (ANALOG SHEET) .................................................
CIRCUIT DIAGRAM (ANALOG SHEET) 1/4 ............................................
CIRCUIT DIAGRAM (ANALOG SHEET) 2/4 ............................................
CIRCUIT DIAGRAM (ANALOG SHEET) 3/4 ............................................
CIRCUIT DIAGRAM (ANALOG SHEET) 4/4 ............................................
INFOMATION ...........................................................................................
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