Roland DS-90A Operating and maintenance manual

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 ...........................................................................................
Page
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DS-90/90A Feb. 2000
2
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[PARTS]
No. PART CODE PART NAME Q'ty
qK17055177 CABINET ASSY (CABIN00016) 1
●17055155 CABINET ASSY(CABIN00017) 1
w17055182 BADGE SILVER LOGO "ROLAND" SML (HARDW00028) 1
e17055183 LED SHEET "DIGITAL IN" LABEL (HARDW00030) 1
r17055184 1'PORT TUBE (HARDW00032) 2
t17055185 EDGE GRILL SPKR RING PAINTED PLASTIC (HARDW00034) 1
y17055191 SPEAKER TWEETER 25 MM/8 OHM S0108C18 (SPEAK00019) 1
u17055190 SPEAKER WOOFER 160 MM/4 OHM S0604F19 (SPEAK00018) 1
iKG281713500 CHASSIS 1
●G281713501 CHASSIS 1
oG2467412 HEATSINK 1
!0 01905145 SEESAW SWITCH (POWER) SDDJF10100 1
!1 22485109 KNOB 248-109 3
[SCREWS]
No. PART CODE PART NAME Q'ty
a17055188 WOOD SCREW-BRT 10-20x1' ZINC (SCREW00043) 8
b17055187 SCREW 6-20x5/8' TORX PAN HEAD TYPE A-B BLK OX (SCREW00042) 4
c17055186 SCREW #8x3/4' SHT MTL PAN HEAD PHILLIPS BLK OX (SCREW00006) 10
K= DS-90, ●= DS-90A
FRONT VIEW REAR VIEW
LOCATION OF CONTROLS

DS-90/90A Feb. 2000
3
EXPLODED VIEW
[PARTS]
No. PART CODE PART NAME Q'ty
qK17055177 CABINET ASSY (CABIN00016) 1
●17055155 CABINET ASSY(CABIN00017) 1
w17055182 BADGE SILVER LOGO "ROLAND" SML (HARDW00028) 1
e17055183 LED SHEET "DIGITAL IN" LABEL (HARDW00030) 1
r17055184 1'PORT TUBE (HARDW00032) 2
t17055185 EDGE GRILL SPKR RING PAINTED PLASTIC (HARDW00034) 1
y17055191 SPEAKER TWEETER 25 MM/8 OHM S0108C18 (SPEAK00019) 1
u17055190 SPEAKER WOOFER 160 MM/4 OHM S0604F19 (SPEAK00018) 1
i01897512 DA BOARD ASSY 1
o01897534 ANALOG SHEET ASSY (230V/240V) 1
!0 H4019130 WIRING AWG-18 GND 70MM 1
!1 H2369418 LED SPACER LED-14T 2
!2 F2199507 LED BOARD SPACER RS-1 2
!3 F2199508 LED BOARD SPACER RS-57 2
!4 H4039102 WIRING AWG-20 UL1430 W BROWN 100MM 3
!5 H4039103 WIRING AWG-20 UL1430 W RED 100MM 3
!6 H4039104 WIRING AWG-20 UL1430 W ORANGE 100MM 3
!7 H4039105 WIRING AWG-20 UL1430 W BROWN 140MM 2
!8 H4039106 WIRING AWG-20 UL1430 W RED 140MM 2
!9 H4039107 WIRING AWG-20 UL1430 W ORANGE 140MM 2
@0 H4039108 WIRING AWG-20 UL1430 W BROWN 180MM 1
@1 H4039109 WIRING AWG-20 UL1430 W RED 180MM 1
@2 H4039101 WIRING AWG-20 UL1430 W ORANGE 180MM 1
@3 G3489210 WIRING W BLACK 90MM 1
@4 G3489211 WIRING W BROWN 90MM 1
@5 G3489206 WIRING 4P 60MM 1
@6 G3489207 WIRING 5P 120MM 1
@7 G3489208 WIRING 6P 150MM 1
@8 KG281713500 CHASSIS 1
●G281713501 CHASSIS 1
@9 G2467412 HEATSINK 1
#0 G2457147 TRANSFORMER 100V/117V 1
G2457148 TRANSFORMER 230V/240V 1
#1 01905145 SEESAW SWITCH (POWER) SDDJF10100 1
#2 G2247106 CUSHION 3
#3 G2537710 CAUTION SEAL FUSE CAUTION 117V 1
#4 G2537608 CAUTION SEAL GND CAUTION 1
#5 22485109 KNOB 248-109 3
#6 G348920501 WIRING 4P 490MM 1
#7 G348920901 WIRING VHR4N L600 + L530 1
[SCREWS]
No. PART CODE PART NAME Q'ty
a17055188 WOOD SCREW-BRT 10-20x1' ZINC (SCREW00043) 8
b17055187 SCREW 6-20x5/8' TORX PAN HEAD TYPE A-B BLK OX (SCREW00042) 4
c17055186 SCREW #8x3/4' SHT MTL PAN HEAD PHILLIPS BLK OX (SCREW00006) 10
d17055189 WOOD SCREW-ZINC #4x3/4' PAN HEAD PHILLIPS (SCREW00047) 2
40013001 SCREW M4x8 PAN W SEMS BZC 6
f40012967 SCREW 3x10 PAN MACHINE SCREW W/SW+PW BZC 6
g40013056 SCREW 3x6 PAN MACHINE W/SW+SMALL PW ZC 5
hK40010245 SCREW 3x6 BINDING BZC 1
●40010245 SCREW 3x6 BINDING BZC 2
I40011312 SCREW 3x8 BINDING TAPTITE P FE BZC 4
j40012501 SCREW 4x12 BINDING TAPTITE P FE BZC 2
k40013012 SCREW M4x10 PAN SEMS FE BZC 4
l40011767 FRANGE HEX NUT M4 FECM 5
m40011889 EXTERNAL TOOTH WASHER M4 FECM 1
17048630 VR ACCESSORY NUT M9 3
o17048631 VR ACCESSORY WASHER M9 3
K= DS-90, ●= DS-90A
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#0
!3 !1
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!0m
@4@3
r
Note : The cabinet structure is slightly different between the
DS-90 and DS-90A. All other parts are indentical.

DS-90/90A Feb. 2000
4
BLOCK DIAGRAM

DS-90/90A Feb. 2000
5
PARTS LIST
*1 *2
↓↓ Q’TY
CASING
# 17055177 CABINET ASSY (CABIN00016) (for DS-90) 1
# 17055155 CABINET ASSY (CABIN00017) (for DS-90A) 1
# 17055184 1'PORT TUBE (HARDW00032) 2
# 17055182 BADGE SILVER LOGO ROLAND SML (HARDW00028) 1
# 17055185 EDGE GRILL SPKR RING PAINTED PLASTIC (HARDW00034) 1
# 17055183 LED SHEET DIGITAL IN LABEL (HARDW00030) 1
CHASSIS
# G281713500 CHASSIS (for DS-90) 1
# G281713501 CHASSIS (for DS-90A) 1
KNOB, BUTTON
22485109 KNOB 248-109 3
SWITCH
01905145 SDDJF10100 SEESAW SWITCH (POWER) 1
# 01900989 SSSF120500 SLIDE SWITCH SW2 on DA. SW1 on AS 2
# 01900990 SSSF123800 SLIDE SWITCH SW3 on DA 1
JACK, EXT TERMINAL
# 01901001 NCJ9FI-H PHONE AND XLR EXT CONNECTOR JK2 on AS 1
00458801 YKC21-3044 PIN 0/0 RCA PIN JACK JK2 on DA 1
01343001 TORX178A OPTICAL DIGITAL IN JK3 on DA (for DS-90) 1
01343001 TORX178A OPTICAL DIGITAL IN JK1 on DA (for DS-90A or New DA) 1
SPEAKER, BUZZER
# 17055191 SPEAKER TWEETER (25 MM/8 OHM) S0108C18 (SPEAK00019) 1
# 17055190 SPEAKER WOOFER (160 MM/4 OHM) S0604F19 (SPEAK00018) 1
PWB ASSY
# 01897512 DA BOARD ASSY 1
# 01897534 ANALOG SHEET ASSY 230V/240V 1
NOTE: 'ANALOG SHEET ASSY' includes the following parts.
******** POWER AMP BOARD
******** HEAD AMP BOARD
******** INLET BOARD
******** LED BOARD
NOTE: Replacement 'ANALOG SHEET Assy' is for 230 V/240 V version only. And 230 V/240 V version only in fusesystem.
When using 'ANALOG SHEET Assy' for 100 V/117 V version, replace fuse of specific voltage version. (refer to TABLE A)
TABLE A
100 V/117 V
230 V/240 V
F1
F2559424 5TT 3 A/125 V
F2559102 5ST 1.25 A/250 V
IC
01451578 AK4324-VF-E2 IC (DAC) IC7 on DA (for DS-90) 1
01451578 AK4324-VF-E2 IC (DAC) IC2 on DA (for DS-90A or New DA) 1
00675290 CS8412-CP IC (DIGITAL INTERFACE) IC2 on DA (for DS-90) 1
00675290 CS8412-CP IC (DIGITAL INTERFACE) IC5 on DA (for DS-90A or New DA) 1
15199190 NJM7805FA IC (V.RGL) IC5 on AS 1
15199209 NJM7815FA IC (V.RGL) IC4 on AS 1
15199208 NJM7915FA IC (V.RGL) IC3 on AS 1
15169625 TC74HC595AP IC (HC MOS) IC4 on DA 1
15169512 TC74HCU04P IC (HC MOS) IC1, IC8 on DA (for DS-90) 2
15169512 TC74HCU04P IC (HC MOS) IC3 on DA (for DS-90A or New DA) 1
15189129 TL072CP IC (OP AMP) IC6 on DA. IC1, IC2, IC6, IC7 on AS 5
15189129 TL072CP IC (OP AMP) IC1 on DA. IC1, IC2, IC6, IC7 on AS
(for DS-90A or New DA) 5
TRANSISTOR
15119111 2SA970-GR TRANSISTOR Q14, Q17, Q18, Q24 on AS 4
15119113 2SA1015-GR TRANSISTOR Q3, Q5 on DA. Q25 on AS (for DS-90) 3
15119113 2SA1015-GR TRANSISTOR Q2, Q4 on DA. Q25 on AS
(for DS-90A or New DA) 3
01455889 2SA1145-Y TRANSISTOR Q11, Q15 on AS 2
15119156 2SA1358-Y TRANSISTOR Q7, Q9 on AS 2
00122245 2SA1671 TRANSISTOR Q2, Q4 on AS 2
15129114 2SC1815-GR TRANSISTOR Q4, Q6 on DA. Q21, Q26 on AS (for DS-90) 4
15129114 2SC1815-GR TRANSISTOR Q3, Q5, Q7, Q8 on DA. Q21, Q26 on AS
(for DS-90A or New DA) 6
15129120 2SC2240-GR TRANSISTOR Q16, Q19, Q20, Q23, Q28-Q32 on AS 9
15129437 2SC2705-Y TRANSISTOR Q12, Q13 on AS 2
15129136 2SC2878-A TRANSISTOR Q1, Q2 on DA. Q22, Q27 on AS (for DS-90) 2
15129136 2SC2878-A TRANSISTOR Q1, Q6 on DA. Q22, Q27 on AS
(for DS-90A or New DA) 2
15129421 2SC3421-Y TRANSISTOR Q5, Q6, Q8, Q10 on AS 4
00122256 2SC4386 TRANSISTOR Q1, Q3 on AS 2
DIODE
F5019209RT 1N4004 DIODE D1, D3, D8, D9 on AS 4
15019126 1SS133 T-77 SWITCHING DIODE D1 on DA. D4-D7 on AS 5
F5019407 MTZ J2.0B ZENER DIODE D1 on DA 1
F5019205 CP1002 10A/200V BRIDGE DIODE D2 on AS 1
# F5029119 L-1154GD LED (GREEN) LED2 on AS 1
# F5029120 L-1154ND LED (ORANGE) LED1 on AS 1
RESISTOR
# F3749114 10 OHM 1/2W CARBON RESISTER R29 on DA (for DS-90) 1
# F3749114 10 OHM 1/2W CARBON RESISTER R35 on DA (for DS-90A or New DA) 1
# 13829904 27 OHM 1/2W CARBON RESISTOR R14, R15 on AS 2
13749189 100 OHM 1/2W CARBON RESISTOR R9, R10, R12, R16 on AS 4
F3839181 0.33 OHM 5W CEMENT RESISTOR R1, R2, R4, R5 on AS 4
# F3839188 82 OHM 5W CEMENT RESISTOR R46 on AS ( for DS-90 ) 1
# F3839654 82 OHM 7W CEMENT RESISTOR R46 on AS ( for DS-90A or New AS) 1
# F3829904 4.7 OHM 1/2W NON-FLAME RESISTOR R3, R6, R7, R8 on AS 4
# F3829905 33 OHM 1/2W NON-FLAME RESISTOR R11, R13, R17, R19 on AS 4
POTENTIOMETER
# 01789045 RK11K1120A0A 10KA 11MM ROTARY POTENTIOMETER VR1 on AS 1
# 01789067 RK11K112002F 50KB (W/C.C.) 11MM ROTARY POTENTIOMETER VR2 on AS 1
# 01789056 RK11K112002K 10KB (W/C.C.)
11MM ROTARY POTENTIOMETER VR3 on AS 1
CAPACITOR
F3519502 EC8472MH CERAMIC CAPACITOR C1 on AS 1
F3519501 PY17FY472MLO 472/250V CERAMIC CAPACITOR C50 on AS 1
13639194RT SKR102MIVJ35 1000UF/35V ELECTROLYTIC CAPACITOR C3, C4, C12, C13 on AS 4
13639175 2200UF/25V ELECTROLYTIC CAPACITOR C26 on AS 1
# F3659231 10000UF/35V ELECTROLYTIC CAPACITOR C8, C9 on AS 2
# F3549258 0.15UF FILM CAPACITOR C38, C42 on AS 2
# 13549282 0.18UF FILM CAPACITOR C54, C55 on AS 2
# F3549263 0.47UF FILM CAPACITOR C32, C35, C38, C40 on DA. C28,
C53 on AS (for DS-90) 6
# F3549263 0.47UF FILM CAPACITOR C3, C4, C17, C18 on DA. C28,
C53 on AS (for DS-90A or New DA) 6
SAFETY PRECAUTION: *1
The parts marked have
safety-related characteristics.
Use only listed parts for
replacement.
CONSIDERATIONS ON PARTS ORDERING
When ordering any parts listed in the parts list, please specify the following items in the order
sheet.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex. 10 22575241 Sharp key C-20/50
15 2247017300 Knob (orange) DAC-15D
Failure to completely fill the above items with correct number and description will result in delayed
or even undelivered replacement.
The parts marked
# are new (initial
parts). *2
DA BOARD ---> DA, ANALOG SHEET ---> AS

DS-90/90A Feb. 2000
6
INDUCTOR, COIL, FILTER
12449268 BL02RN2-R62T2 FERRITE-BEAD L1 on DA 1
12449426 BLM31B601SPT FERRITE-BEAD L2-L6 on DA (for DS-90A or New DA) 5
12449615 PT-10244-615 PULSE TRANSFORMER FL1 on DA 1
FUSE, FUSE HOLDER
F2559102 5ST 1.25A/250V (230V/240V) FUSE 5x20 F1 on AS 1
# F2559424 5TT 3A/125V (100V/117V) FUSE 5x20 F1 on AS 1
F2029601 FH-1 FUSE COVER F1 on AS 1
12199550RT HTF-015 FUSE HOLDER F1 on AS 2
CONNECTOR
13369913 B4P-VH 4P 7A/250V CONNECTOR CN1 on AS 1
13369664 S4B-PH-K-S(4P) CONNECTOR CN2 on DA. CN2, CN6 on AS 3
13369665 S5B-PH-K-S(5P) CONNECTOR CN5 on AS 1
13369666 S6B PH-K-S(6P) CONNECTOR CN1on DA 1
WIRING, CABLE
# G348920501 490MM WIRING 4P CN2 on AS to CN2 on DA 1
# G3489206 60MM WIRING 4P CN6 on AS to CN3 on DA 1
# G3489207 120MM WIRING 5P CN4 to CN5 on AS 1
# G3489208 150MM WIRING 6P CN3 on AS to CN1 on DA 1
# G348920901 VHR4N L600 + L530 WIRING CN1 on AS to WOOFER & TWEETER. 1
# G3489210 W BLACK 90MM WIRING TER4 on AS to POWER SWITCH 1
# G3489211 W BROWN 90MM WIRING TER7 on AS to POWER SWITCH 1
# H4019130 AWG-18 GND WIRING 70MM WIRING JK1 on AS to CHASSIS 1
# H4039101 AWG-20 UL1430 W ORANGE 180MM WIRING POWER AMP BOARD to POWER TR 1
# H4039102 AWG-20 UL1430 W BROWN 100MM WIRING 3
# H4039103 AWG-20 UL1430 W RED 100MM WIRING 3
# H4039104 AWG-20 UL1430 W ORANGE 100MM WIRING 3
# H4039105 AWG-20 UL1430 W BROWN 140MM WIRING 2
# H4039106 AWG-20 UL1430 W RED 140MM WIRING 2
# H4039107 AWG-20 UL1430 W ORANGE 140MM WIRING 2
# H4039108 AWG-20 UL1430 W BROWN 180MM WIRING 1
# H4039109 AWG-20 UL1430 W RED 180MM WIRING 1
TRANSFORMER
# G2457147 100V/117V TRANSFORMER 1
# G2457148 230V/240V TRANSFORMER 1
AC INLET, OUTLET
00125023 PWI1818INL7 10A/250V AC INLET (3P) JK1 on AS 1
SCREWS
40010245 SCREW 3x6 BINDING BZC for TER1 on DA ( for DS-90 ) 1
40010245 SCREW 3x6 BINDING BZC for TER1 on DA ( for DS-90A ) 2
40013056 SCREW M3x6 PAN MACHINE W/SW+SMALL PW ZCfor POWERAMP BOARD on AS 5
40011312 SCREW 3x8 BINDING TAPTITE P FE BZC for JK2-3 on DA. JK2 on AS 4
40012967 SCREW M3x10 PAN MACHINE SCREW W/SW+PW BZC for Q1-6. IC5 & HS1 on AS 6
# 40013001 SCREW M4x8 PAN W SEMS BZC for HEATSINK 6
40013012 SCREW M4x10 PAN SEMS FE BZC for TRANSFORMER 4
40012501 SCREW 4x12 BINDING TAPTITE P FE BZC for JK1 on AS 2
40011889 EXTERNAL TOOTH WASHER M4 FECM for CHASSIS GND 1
40011767 FRANGE HEX NUT M4 FECM for TRANSFORMER & CHASSIS GND 5
# 17055186 SCREW #8x3/4' SHT MTL PAN HEAD
PHILLIPS BLK OX (SCREW00006) for CHASSIS 10
# 17055187 SCREW 6-20x5/8' TORX PAN HEAD
TYPE A-B BLK OX (SCREW00042) for TWEETER 4
# 17055188 WOOD SCREW-BRT 10-20x1' ZINC (SCREW00043) for WOOFER 8
# 17055189 WOOD SCREW-ZINC #4x3/4'
PAN HEAD PHILLIPS (SCREW00047) for LED BOARD 2
17048630 VR ACCESSORY NUT M9 3
17048631 VR ACCESSORY WASHER M9 3
PACKING
# 17055178 SHIPPING CARTON (CARTO00065) (for DS-90) 1
# 17055199 SHIPPING CARTON (CARTO00047) (for DS-90A) 1
# 17055179 SHIPPING INSERT TRAY (CARTO00048) for SHIPPING CARTON (for DS-90) 1
# 17055200 SHIPPING INSERT TRAY (CARTO00052) for SHIPPING CARTON (for DS-90A) 1
# 17055180 TUBE INSERT (CARTO00049) for SHIPPING CARTON (for DS-90) 1
# 17055201 TUBE INSERT (CARTO00053) for SHIPPING CARTON (for DS-90A) 1
# 17055181 DIVIDER INSERT (CARTO00050) for SHIPPING CARTON (for DS-90) 1
# 17055202 DIVIDER INSERT (CARTO00051) for SHIPPING CARTON (for DS-90A) 1
# 17055210 OUTER SHIPPING BOX(BRN) (CARTO00051) (for DS-90A) 1
# 17055211 CORNER PAD(GREEN) Z-PARTS for OUTER SHIPPING BOX (for DS-90A) 8
MISCELLANEOUS
G2537710 CAUTION SEAL FUSE CAUTION 117 V 1
G2537608 CAUTION SEAL GND CAUTION 1
# G2247106 CUSHION for SLIDE SWITCH 3
# G2467412 HEATSINK on CHASSIS 1
# G2467111 HEATSINK K217 H=25 on HS1 on AS 1
# F2199507 RS-1 LED BOARD SPACER on LED BOARD on AS 2
# F2199508 RS-57 LED BOARD SPACER on LED BOARD on AS 2
# H2369418 LED-14T LED SPACER on LED1, LED2 on AS 2
H5039705 1741BS-2 187 TERMINAL on TER1-TER8 on AS 8
ACCESSORIES (Standard)
# 17055162 OWNER'S MANUAL JAPANESE (for DS-90)
# 17055212 OWNER'S MANUAL JAPANESE (for DS-90A) 1
# 17055161 OWNER'S MANUAL ENGLISH (for DS-90)
# 17055213 OWNER'S MANUAL ENGLISH (for DS-90A) 1
# G3497133 AC CORD SET 100 V 1
# G3497134 AC CORD SET 117 V 1
# G3497135 AC CORD SET 230 VD 1
# G3497136 AC CORD SET 230 VE 1
# G3497137 AC CORD SET 240 VA 1

DS-90/90A Feb. 2000
7
CIRCUIT BOARD (DA BOARD)
View from components side
for DS-90 for DS-90A or NEW DA
View from components side

DS-90/90A Feb. 2000
8
TO HEAD AMP BOARD CN6
TO POWER AMP BOARD CN3
Green
Orange
POWER LED
DIGITAL IN LED
LED BOARD
(Analog Sheet)
Wiring
Tighten a screw with TORX178A
FGND
Rch
Rch
Lch
Lch
D
D
D D
D
D
+5D
+5D
D
+5D
D
D
+5D
D
+5D
D
+5D
D
+5D
D
A
A
-15
+15
+5A
D
D
D
A
AA A
A
A
+15
-15
+5A
+5D
D
D
D
+5D
DD
D
+15
-15AAA
DA
+5D
+5D
D
+5D
D
A-15AA
+15
AAA
D
D
D
D
D
D
A
A
A
D
D
DA D
R1
75
R4
1k
R5
10k
R6
10k
R34
10k
R32
15k
C2
0.1
C3
0.01
C8
0.1
C30
470p
R23 1k
R25
2.2k
R26
2.2k
R27
1k
SW3A
SSSF123800
11
12
13
14 15
C4
0.047
R2
47k
R3
2.2k
IC4
TC74HC595AP
QH- 9
QH 7
QG 6
QF 5
QE 4
QD 3
QC 2
QB 1
QA 15
SI
14
SCLR
10
G
13
SCK
11
RCK
12
VCC 16
GND
8
JK3
TORX178A
2 3
1
JK2B
YKC21-3044
22
21
JK2A
YKC21-3044
12
11
IC1D
TC74HCU04AP
9 8
IC1E
TC74HCU04AP
11 10
R30
470
D1
1SS133
1 2
C29
0.1
R31
10k
IC6A
TL072CP
+
-
2
3
1
C33
47/16 R33
220
R37
10k
R41
10k
R43
15k
R39
15k
C37
470p
C41
470p
R38
10k
IC6B
TL072CP
+
-
6
5
7
Q2
2SC2878A
3
1 2
C39
47/16
R42
47k
R40
220
R44
10k
IC6C
TL072CP
+
-
84
Q3
2SA1015GR
3
2 1
R49
47k
R45
47k
R46
47k
Q4
2SC1815GR
3
1 2
R47
47k
R48
47k
C42
0.1
C47
0.1
C44
0.01
FL1
PT-10
1
2
3 4
6
1020
R50
75 L1
BL02RN2-R62
C12
0.1
R53
47k
R51
390
R52
390
C46
0.1
C31
100/35
IC1F
TC74HCU04AP
13 12
IC1C
TC74HCU04AP
5 6
IC1A
TC74HCU04AP
1 2
IC1G
TC74HCU04AP
147
IC1B TC74HCU04AP
34
IC8C
TC74HCU04AP
5 6
IC8A
TC74HCU04AP
1 2
IC8B
TC74HCU04AP 3 4
IC8D
TC74HCU04AP
9 8
IC8E
TC74HCU04AP
11 10
IC8F
TC74HCU04AP
13 12
IC8G
TC74HCU04AP
147
C10
100/35
R29
10 1/2W
C1
100/35 R54
220
R55
220
IC7
AK4324
DVSS
1DVDD 2
CKS
3MCLK
4
PD
5
BICK
6
SDATA
7
LRCK
8
SMUTE
9
DFS
10
DEM0
11 DEM1
12
DIF0
13 DIF1
14 DIF2
15
AOUTR- 16
AOUTR+ 17
AOUTL- 18
AOUTL+ 19
AVSS
20
VREF 21
AVDD 22
DZFR 23
DZFL 24
C24
47/35
C23
47/35
Q5
2SA1015GR
3
2 1
R61
47k
R57
47k
R59
47k
R58
47k
Q6
2SC1815GR
3
1 2
R60
47k
C43
0.1
C45
47/16 BP
CN1
S6B-PH-K-S
1
12
23
34
45
56
6
CN2
4P-SAN
1
12
23
34
4
CN3
S4B-PH-K-S
1
12
23
34
4
C48
0.1
C49
0.1
Q1
2SC2878A
3
1 2
C36
470p
R35
47k
R36
15k
SW3B
SSSF123800
21
22
23
24 25
C32
0.47
C35
0.47
C38
0.47
C40
0.47
LED1
12
LED2
12
CN2
S4B-PH-K-S
11
22
33
44
100
10p
0.1
0.1
0.1
0.1
0.1
1
R56
10k
SW2B
SSSF120500
21
23 22
IC2
CS8412-CP
DGND 8
M3 17
M2 18
M1 24
M0 23
VD+ 7
ERF 25
CBL 15
V28
U14
C1
FSYNC 11
SCK 12
SDATA 26 RXP
9
RXN
10
VA+
22
FILT
20
MCK
19
CS12/FCK
13 SEL
16
C0/E0
6
CA/E1
5
CB/E2
4
CC/F0
3
CD/F1
2
CE/F2
27
AGND
21
C34
0.01
TER1
JH-8M3
1 2 3
4
C27
0.1
C25
100/35
C6
0.1
C26
0.1
0.1
0.1
C5
0.1
C28
100/35
0.1
SW2C
SSSF120500
10 20
JK2C
YKC21-3044
AB
10
SW3C
SSSF123800
10 20
Optical IN
Coaxial IN
Coaxial Through
CIRCUIT DIAGRAM (DA BOARD) for DS-90

DS-90/90A Feb. 2000
9
CIRCUIT DIAGRAM (DA BOARD)
POWER LED
Green
DIGITAL IN LED
Orange
Rch
Rch
Lch
Lch
D
D
D D
D
D
+5D +5D
D
+5D
D
D
+5D
D
+5D
D
+5D
D
+5D
D
A
A-15
+15
+5A
D
D
D
A
AA A
A
A
+15
-15
+5D
D
D
D
+15
-15AAA
DA
+5D +5D
D
+5D
A-15 A
+15
AAA
D D
D
D
D
A
A
A
DA D
D
A
D
+5D
D D
D
D A
+5A
R41
75
R42
1k
R32
10k
R30
10k
R25
10k
R20
15k
C34
0.1
C33
0.01
C10
470p
R17 1k
R23
2.2k
R8
2.2k
R13
1k
SW1A
SSSF123800
11
12
13
14 15
C41
0.047
R39
47k
R34
2.2k
IC4
TC74HC595AP
QH- 9
QH 7
QG 6
QF 5
QE 4
QD 3
QC 2
QB 1
QA 15
SI
14
SCLR
10
G
13
SCK
11
RCK
12
VCC 16
GND
8
JK1
TORX178A
Optical IN
Coaxial IN
Coaxial Through
2 3
1
JK2B
YKC21-3044
22
21
JK2A
YKC21-3044
12
11
D1
ZDi
2.0V
1 2
C23
0.1
R24
10k
IC1A
TL072CP
+
-
2
3
1
C16
47/16 R18
220
R19
10k
R7
10k
R3
15k
R6
15k
C2
470p
C6
470p
R1
10k
Q1
2SC2878A
3
1 2
C1
47/16
R2
47k
R4
220
R5
10k
IC1B
TL072CP
+
-
6
5
7
Q2
2SA1015GR
3
2 1
R11
47k
R9
47k
R10
47k
Q3
2SC1815GR
3
1 2
R26
47k
R12
47k
C13
0.1
R45
75
C27
0.1
R43
47k
R36
390
R29
390
C40
100/35
IC3G
TC74HCU04AP
147
C32
100/35
R35
10 1/2W
R31
220
R37
220
IC2
AK4324
DVSS
1DVDD 2
CKS
3MCLK
4
PD
5
BICK
6
SDATA
7
LRCK
8
SMUTE
9
DFS
10
DEM0
11 DEM1
12
DIF0
13 DIF1
14 DIF2
15
AOUTR- 16
AOUTR+ 17
AOUTL- 18
AOUTL+ 19
AVSS
20
VREF 21
AVDD 22
DZFR 23
DZFL 24
C8
47/35
C7
47/35
Q4
2SA1015GR
3
2 1
R22
47k
R14
47k
R27
47k
R16
47k
C14
0.1
CN1
S6B-PH-K-S
1
12
23
34
45
56
6
C21 0.1
Q6
2SC2878A
3
1 2
C11
470p
R28
47k
R21
15k
SW1B
SSSF123800
21
22
23
24 25
C18
0.47
C17
0.47
C4
0.47
C3
0.47
220
R40
0.1
C22
0.1
C20
0.1
C15
SW2C
SSSF120500
10 20
JK2C
YKC21-3044
AB
10
SW1C
SSSF123800
10 20
IC3B
TC74HCU04AP
3 4
IC3C
TC74HCU04AP
5 6
IC3A
TC74HCU04AP
12
C28
0.1
C25
0.1
R15
47k
Q5
2SC1815GR
3
1 2
Q7
2SC1815GR
3
1 2
R44
47k
R46
47k
Q8
2SC1815GR
3
1 2
L1
BL02RN2-R62
C42
0.1
C37
47/16 BP
C38
0.01
SW2B
SSSF120500
21
23 22
IC3D
TC74HCU04AP
98
IC3E
TC74HCU04AP
1110
IC3F
TC74HCU04AP
1312
FL1
PT-10
1
2
34
6
1020
C29
10/35
C36
0.1
TER1
JH-8M3
1 2 3
4
0.1
C30
C35
0.1
TER2
JH-8M3
1 2 3
4
C24
0.1
0.1
C9
0.1
C26
IC5
CS8412-CP
DGND 8
M3 17
M2 18
M1 24
M0 23
VD+ 7
ERF 25
CBL 15
V28
U14
C1
FSYNC 11
SCK 12
SDATA 26 RXP
9
RXN
10
VA+
22
FILT
20
MCK
19
CS12/FCK
13 SEL
16
C0/E0
6
CA/E1
5
CB/E2
4
CC/F0
3
CD/F1
2
CE/F2
27
AGND
21
IC1C
TL072CP
+
-
84
SW2A
SSSF120500
11
13 12
CN3
4P-SAN
1
12
23
34
4
CN2
S4B-PH-K-S
1
12
23
34
4
0.1
C5
L2 BLM31B601SPT
L6 BLM31B601SPT
L5 BLM31B601SPT
L4 BLM31B601SPT
C12
0.1
C19
100/35
L3 BLM31B601SPT
R47
4.7k
LED2
12
CN2
S4B-PH-K-S
11
22
33
44
LED1
12
TO POWER AMP BOARD CN3
TO LED BOARD
Wiring
TO HEAD AMP BOARD CN6
LED BOARD (Analog Sheet)
NIU
DS-90A
S/No.BN22000 UP
NIU
DS-90A
S/No.BN22000 UP
4.7K
for DS-90A or NEW DA

DS-90/90A Feb. 2000
10
CIRCUIT BOARD (ANALOG SHEET)
View from components side

DS-90/90A Feb. 2000
11
CIRCUIT DIAGRAM (ANALOG SHEET)
INPUT LEVEL
LF TRIM
Analog/Digital
HF OUT
LF OUT
HOT
COLD
Frame Ground
HF TRIM
TO DA BOARD
CN3
TO SPEAKER
Non -Flame Type
Non-Flame Type
Non-Flame Type
Non -Flame Type
Non -Flame Type
Non-Flame Type
Non -Flame Type
Non -Flame Type
4700p/250V
F1
TO DA B OARD CN1
Frame Ground
Wiring
HEAD AMP BOARD
(Mute Section)
INLET Board POWER AMP BOARD
(Power Supply Section)
POWER AMP BOARD
POWER AMP BOARD
POWER AMP BOARD
(Low Freq.Amp Section)
(High Freq. Amp Section)
(New) NCJ9FI-H
+15V +15V
+15V +15V
+15V +15V +15V +15V +15V
+15V
+15V
+15V
+15V+15V
+15V
-15V
-15V
-15V
-15V
-15V
-15V
-15V-15V-15V
-15V-15V
-15V -15V -15V
+15V
-15V
A+5V
A+5V
Frame Ground
10kHz -4.0dB m 489mV
1kHz 0dBm 775mV 1kHz 0dBm 775mV
10kHz -4.0dBm 489mV
1kHz +0.7 dBm
840mV
10kHz -4.0dB m 489mV
1kHz +0.7 dBm
840mV
1kHz +25 dBm
13.8V @4ohm
10kHz -7dBm
346mV
10kHz +25 .5dBm
14.6V @8ohm
+25V
-25V
+25V
-25V
+25V
-25V
+15
+15
-15
-15
+15
-15
A
A A
A A
A A
A
A
A
-15
+15
+15
-15
A
+15
-15
+15
-15A A
A
+15
-15
A
A
A
A
A
+15
-15
A
A
A
A
A
A
A
+15
-15
A
A
A
A A
+15
-15
A
A
A
A
A
A
-15
+5A
A
A
A
+15
+15
A A
+5A
A
+15
A
-15
-15
A
A
A
A
A
A
A
-15
A
+15
+15
A
A
SW1B
SSSF120500
21
23 22
Q28
2SC2240GR
3
1 2
Q32
2SC2240GR
3
1 2
Q31
2SC2240GR
3
1 2
Q29
2SC2240GR
3
1 2
Q30
2SC2240GR
3
1 2
R106
10k
R105
10k
R108
10k
R103
470k
R95
47
R83
10k
R85
56k
R93
10k
R82
10k
R90
12k R92
10k
R88
12k
R80
10k R84
10k
R98
10k
R111
10k
R102
10k
R94
10k
R91
10k
C42
0.15
C38
0.15
C37
0.0039
C34
0.0039
C36
0.0039
C33
0.0039
C52
0.0047
C56
0.0039
C35
0.0039
R86
12k
R89
12k
C51
0.0047
C44
0.0047
IC6A
TL072CP
+
-
2
3
1
IC6B
TL072CP
+
-
6
5
7
IC6C
TL072CP
+
-
84
R113
180k
R110
100k
R109
180k
R115
47k
R101
10k
R114
10k
C55
0.18
C54
0.18
C46
0.22
R116
22k
IC7C
TL072CP
+
-
84
IC7B
TL072CP
+
-
6
5
7
R96
47
C47
0.22
VR1A
RK11K1120A0A
10kA
1
2
3
4
VR2A
RK11K112002F
50kB CC
1
2
3
4
C57
10/35
C49
10/35
C41
10/35
C43
10/35
C45
0.0047
SW1A
SSSF120500
11
13 12
R107 180k
R104
10k
IC7A
TL072CP
+
-
2
3
1
R100
180k
R112
10k
C58
0.047
R87
10k
CN5
S5B-PH-K-S
1
12
23
34
45
5
C53
0.47
Q19
2SC2240GR
3
1 2
Q16
2SC2240GR
3
1 2
Q14
2SA970GR
3
2 1
Q11
2SA1145Y
3
2 1
Q10
2SC3421Y
3
1 2
Q6
2SC3421Y
3
1 2
Q9
2SA1358Y
3
2 1
Q22
2SC2878A
3
1 2
R63
22k
R59
4.7k
R53
4.7k
R58
1.2k
R49
1.2k
R47
1.2k
R60
470
R56
27k
R43
4.7k
R40
27k
R32
390
R34
2.7k
R33
2.7k
R29
390
R18
6.8k
R20
3.9k
R31
22k
R35
22k
R67
10k
R42
22k
R21
8.2k
R16
100 (1/2W)
R12
100 (1/2W)
C2
0.022
C7
0.022
C15
0.22
C22
220p
R22
22k
D5
1SS133
1 2
R17 33 (1/2W)
R8
4.7 (1/2W)
R3
4.7 (1/2W)
R19
33 (1/2W)
IC2A
TL072CP
+
-2
3
1
IC2B
TL072CP
+
-6
5
7
IC2C
TL072CP
+
-
84
C13
1000/35
C12
1000/35
C16
0.1
C11
0.1
R5
SQT5W
0.33
R4
SQT5W
0.33
R15
27 (1/2W)
R39
4.7k
Q12
2SC2705Y
3
1 2
R50
4.7k
Q3
2SC4386
1
3 2
CN1
B4P-VH
1
12
23
34
4
Q4
2SA1671
1
2 3
CN4
5P-SAN
11
22
33
44
55
Q23
2SC2240GR
3
1 2
Q20
2SC2240GR
3
1 2
Q24
2SA970GR
3
2 1
Q17
2SA970GR
3
2 1
Q15
2SA1145Y
3
2 1
Q8
2SC3421Y
3
1 2
Q5
2SC3421Y
3
1 2
Q13
2SC2705Y
3
1 2
Q7
2SA1358Y
3
2 1
Q27
2SC2878A
3
1 2
R74
22k
R71
4.7k
R61
4.7k
R73
470
R64
470
R57
470
R76
470
R68
27k
R55
4.7k
R52
4.7k
R51
27k
R44
390
R41
2.7k
R36
2.7k
R38
390
R23
6.8k
R26
3.9k
R28
22k
R30
22k
R79
10k
R45
22k
R24
8.2k
R48
4.7k
R27
68k
R10
100 (1/2W)
R9
100 (1/2W)
R1
SQT5W
0.33
R2
SQT5W
0.33
C6
0.022
C5
0.022
C24
220p
C14
0.22
R13
33 (1/2W)
R6
4.7 (1/2W)
R7
4.7 (1/2W)
R11 33 (1/2W)
IC1A
TL072CP
+
-2
3
1
IC1B
TL072CP
+
-6
5
7
IC1C
TL072CP
+
-
84
C4
1000/35
C3
1000/35
C17
0.1
C10
0.1
R14
27 (1/2W)
R37
10k
Q1
2SC4386
1
3 2
Q2
2SA1671
1
2 3
R25 220k
D7
1SS133
1 2
C28
0.47
TER8
FASTEN
1
TER5
FASTEN
1
TER4
FASTEN
1
TER7
FASTEN
1
JK1
PWI-1818
2
1
FH2
HTF-015
FH1
HTF-015
C50
PY17FY TER6
FASTEN
1
IC4 NJM7815FA
IN
1OUT 3
GND
2
IC5 NJM7805FA
IN
1OUT 3
COM
2
IC3
NJM7915FA
IN
2OUT 3
COM 1
D2
CP1002
+-
~
~
2 3
14
D9
1N4004G
1 2
D8
1N4004G
1 2
C19
0.1
C18
0.1
C1
EC8472MH
472/250
C21
100/35
C9
10000/35
C8
10000/35
C27
100/35
TER3
FASTEN
1
TER1
FASTEN
1
TER2
FASTEN
1
C26
2200/25
C30
0.1
R46 SQP5W (7W)
82
D3
1N4004G
1 2
D1
1N4004G
1 2
CN3
6P-SAN
1
1
2
2
3
3
4
4
5
5
6
6
R75
100k
C23
10/35
R66
47k
R65
100k
R69
47k
Q26
2SC1815GR
3
1 2
R70
100 R77
47k
Q25
2SA1015GR
3
2 1
R72
47k
C29
47/35
R78
100k
Q21
2SC1815GR
3
1 2
C25
0.22
CN6
S4B-PH-K-S
11
22
33
44
R81
470k
C48
0.047
JK2
(Ol d) NCJ9FK-H
TS
T
RS
R
SS
S
FG
2
3
1
4
5
6
7
8
9
10
VR3A
RK1 1K112002K
10kB CC
1
2
3
4
D6
1SS133
12
D4
1SS133
12
C40
10/35
R97
470k
C32
10/35
R99
10k
C31
10/35
C59
0.1
C39
10/35
C20
100/35
Q18
2SA970GR
3
2 1
R54
1.2k
R62
470

DS-90/90A Feb. 2000
12
INPUT LEVEL
LFTRIM
Analog/Digital
HF OUT
LF OUT
HOT
COLD
Frame Ground
HF TRIM
TO DA BOARD
CN3
HEAD AMP BOARD
-15V
10kHz -4.0dBm 489mV
1kHz0dBm 775mV 1kHz0dBm 775mV 10kHz -4.0dBm 489mV
1kHz+0.7dBm
840mV
10kHz -4.0dBm 489mV
TO POWER AMP BOARD CN4
+15 +15
-15
-15 -15
A
A A
A A
A A
A
A
A
-15
+15
-15
A
-15 -15A A
A
-15
A
A
A
A
A
A
A
A
-15
A
SW1B
SSSF120500
21
23 22
Q28
2SC2240GR
3
1 2
Q32
2SC2240GR
3
1 2
Q31
2SC2240GR
3
1 2
Q29
2SC2240GR
3
1 2
Q30
2SC2240GR
3
1 2
R106
10k
R105
10k
R108
10k
R103
470k
R95
47
R83
10k
R85
56k
R93
10k
R82
10k
R90
12k R92
10k
R88
12k
R80
10k R84
10k
R98
10k
R111
10k
R102
10k
R94
10k
R91
10k
C42
0.15
C38
0.15
C37
0.0039
C34
0.0039
C36
0.0039
C33
0.0039
C52
0.0047
C56
0.0039
C35
0.0039
R86
12k
R89
12k
C51
0.0047
C44
0.0047
IC6A
TL072CP
+
-
2
31
IC6B
TL072CP
+
-
6
57
IC6C
TL072CP
+
-
84
R113
180k
R110
100k
R109
180k
R115
47k
R101
10k
R114
10k
C55
0.18
C54
0.18
C46
0.22
R116
22k
IC7C
TL072CP
+
-
84
IC7B
TL072CP
+
-
6
57
R96
47
C47
0.22
VR1A
RK11K1120A0A
10kA
1
2
3
4
VR2A
RK11K112002F
50kB CC
1
2
3
4
C57
10/35
C49
10/35
C41
10/35
C43
10/35
C45
0.0047
SW1A
SSSF120500
11
13 12
R107 180k
R104
10k
IC7A
TL072CP
+
-
2
31
R100
180k
R112
10k
C58
0.047
R87
10k
CN5
S5B-PH-K-S
1
12
23
34
45
5
C53
0.47
CN6
S4B-PH-K-S
11
22
33
44
R81
470k
C48
0.047
JK2
NCJ9FI-H
TS
T
RS
R
SS
S
FG
2
3
1
4
5
6
7
8
9
10
VR3A
RK11K112002K
10kB CC
1
2
3
4
C40
10/35
R97
470k
C32
10/35
R99
10k
C31
10/35
C59
0.1
C39
10/35
+15
+15
+15
+15
+15 +15
CIRCUIT DIAGRAM (ANALOG SHEET) 1/4

DS-90/90A Feb. 2000
13
CIRCUIT DIAGRAM (ANALOG SHEET) 2/4
TO SPEAKER
Non-Flame Type
Non-Flame Type
Non-Flame Type
Non-Flame Type
POWER AMP BOARD
(High Freq. Amp Se ction)
10kHz + 25.5dBm
14.6V @8ohm
+30V ~
~ -30V
10k Hz -7dBm
346mV
+25V
-25V
MUTE
LF OUT
LF IN
A
A
A
A
+15
-15
A
A
A
A
A
A
A A
-15
A
+15
Q19
2SC2240GR
3
1 2
Q16
2SC2240GR
3
1 2
Q14
2SA970GR
3
2 1
Q11
2SA1145Y
3
2 1
Q10
2SC3421Y
3
1 2
Q6
2SC3421Y
3
1 2
Q9
2SA1358Y
3
2 1
Q22
2SC2878A
3
1 2
R63
22k
R59
4.7k
R53
4.7k
R58
1.2k
R49
1.2k
R47
1.2k
R60
470
R56
27k
R43
4.7k
R40
27k
R32
390
R34
2.7k
R33
2.7k
R29
390
R18
6.8k
R20
3.9k
R31
22k
R35
22k
R67
10k
R42
22k
R21
8.2k
R16
100 (1/2W)
R12
100 (1/2W)
C2
0.022
C7
0.022
C15
0.22
C22
220p
R22
22k
D5
1SS133
1 2
R17 33 (1/2W)
R8
4.7 (1/2W)
R3
4.7 (1/2W)
R19
33 (1/2W)
IC2A
TL072CP
+
-
2
3
1
IC2B
TL072CP
+
-
6
5
7
IC2C
TL072CP
+
-
84
C13
1000/35
C12
1000/35
C16
0.1
C11
0.1
R5
SQT5W
0.33
R4
SQT5W
0.33
R15
27 (1/2W)
R39
4.7k
Q12
2SC2705Y
3
1 2
R50
4.7k
Q3
2SC4386
1
3 2
CN1
B4P-VH
1
12
23
34
4
Q4
2SA1671
1
2 3
C25
0.22
Q18
2SA970GR
3
2 1
R54
1.2k
CN4
5P-SAN
TO
HEAD AMP BOARD
CN5 11
22
33
44
55
D6
1SS133
12

DS-90/90A Feb. 2000
14
Non-Flame Type
Non-Flame Type
Non-Flame Type
Non-Flame Type
POWER AMP BOARD
(Low Freq. Amp Section)
1kHz +25dBm
13.8V @4ohm
+30V ~
~ -30V
1kHz+0.7dBm
840mV
+25V
-25V
MUTE
LF OUT
LF IN
A
A
A
A A
+15
-15
A
A
A
A
A
A
Q23
2SC2240GR
3
1 2
Q20
2SC2240GR
3
1 2
Q24
2SA970GR
3
2 1
Q17
2SA970GR
3
2 1
Q15
2SA1145Y
3
2 1
Q8
2SC3421Y
3
1 2
Q5
2SC3421Y
3
1 2
Q13
2SC2705Y
3
1 2
Q7
2SA1358Y
3
2 1
Q27
2SC2878A
3
1 2
R74
22k
R71
4.7k
R61
4.7k
R73
470
R64
470
R57
470
R76
470
R68
27k
R55
4.7k
R52
4.7k
R51
27k
R44
390
R41
2.7k
R36
2.7k
R38
390
R23
6.8k
R26
3.9k
R28
22k
R30
22k
R79
10k
R45
22k
R24
8.2k
R48
4.7k
R27
68k
R10
100 (1/2W)
R9
100 (1/2W)
R1
SQT5W
0.33
R2
SQT5W
0.33
C6
0.022
C5
0.022
C24
220p
C14
0.22
R13
33 (1/2W)
R6
4.7 (1/2W)
R7
4.7 (1/2W)
R11 33 (1/2W)
IC1A
TL072CP
+
-
2
3
1
IC1B
TL072CP
+
-
6
5
7
IC1C
TL072CP
+
-
84
C4
1000/35
C3
1000/35
C17
0.1
C10
0.1
R14
27 (1/2W)
R37
10k
Q1
2SC4386
1
3 2
Q2
2SA1671
1
2 3
R25 220k
D7
1SS133
1 2
C28
0.47 R62
470
D4
1SS133
12
CIRCUIT DIAGRAM (ANALOG SHEET) 3/4

DS-90/90A Feb. 2000
15
4700p/250V
F1
Frame Ground
(Mute Section)
INLET BOARD POWER AMP BOARD
(Power Supply Section)
POWER AMP BOARD
Frame Ground
+30V ~
~ -30V
+25V
-25V
MUTE
-15
+5A
AA
A
+15 +15 +5A
A A AA
-15
+15
-15
+15
TER8
FASTEN
1
TER5
FASTEN
1
TER4
FASTEN
1
TER7
FASTEN
1
JK1
PWI-1818
2
1
FH2
HTF-015
FH1
HTF-015
C50
PY17FY TER6
FASTEN
1IC4 NJM7815FA
IN
1OUT 3
GND
2
IC5 NJM7805FA
IN
1OUT 3
COM
2
IC3 NJM7915FA
IN
2OUT 3
COM 1
D2
CP1002
+- ~
~
2 3
14
D9
1N4004G
1 2
D8
1N4004G
1 2
C19
0.1
C18
0.1
C1
EC8472MH
472/250
C21
100/35
C9
10000/35
C8
10000/35
C27
100/35
TER3
FASTEN
1
TER1
FASTEN
1
TER2
FASTEN
1
C26
2200/25
C30
0.1
R46 SQP5W (7W)
82
D3
1N4004G
1 2
D1
1N4004G
1 2
R75
100k
C23
10/35
R66
47k
R65
100k
R69
47k
Q26
2SC1815GR
3
1 2
R70
100 R77
47k
Q25
2SA1015GR
3
2 1
R72
47k
C29
47/35
Q21
2SC1815GR
3
1 2
C20
100/35
R78
100k
CN3
6P-SAN
TO
DA BOARD CN1
1
1
2
2
3
3
4
4
5
5
6
6
CIRCUIT DIAGRAM (ANALOG SHEET) 4/4

DS-90/90A Feb. 2000
16
INFOMATION
SW2SW1
C33 C1
CN1 CN3
C35
AK4324
C32
CN2
C48
JK3
TORX178A
CS8412-CP
Roland
DS-90 DA BOARD
01897512
PWB G2927157
10pF
100Ω
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
Cut the Gnd pattern (3 places).
Use a 0.1uF monolithic ceramic capacitor to
connect between Frame Gnd and A Gnd.
View from foil side
XLR Connector Backside
●The following changes were made to the early versions of the DS-90 BOARD.
Ground line is connected to the main body chassis.
0.1uF capactors are connected to the backside.
Use an electrical wire (AWG 24 or equivalent)
to connect to A Gnd (Signal Gnd).
View from components side
View from foil side
DA BOARD for DS-90 ANALOG SHEET for DS-90
(HEAD AMP BOARD BLOCK)