SERVICE NOTES
Issued by RJA
Copyright © 2007 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.
Printed in Japan (0400) (SC-MZ)
17058507E0
Jul. 2007
AC-90
Table of Contents
Cautionary Notes ..............................................................2
Specications........................................................................2
Location of Controls .........................................................4
Location of Controls Parts List........................................5
Exploded View (Cabinet).................................................6
Exploded View (Cabinet) Parts List ...............................7
Exploded View (Chassis) .................................................8
Exploded View (Chassis) Parts List................................9
Parts List ...........................................................................10
Verifying the Version Number......................................14
Test Mode .........................................................................14
Block Diagram/Wiring Diagram..................................20
Circuit Board (Main, XLR Board)..................................22
Circuit Diagram (Main Board: Digital) ........................24
Circuit Diagram (Main Board: Analog, XLR Board) ..26
Circuit Diagram (Main Board: Power Supply) ...........28
Circuit Board (Jack Board) .............................................30
Circuit Diagram (Jack Board) ........................................32
Circuit Board (Panel Board)...........................................34
Circuit Diagram (Panel Board)......................................36
Circuit Board
(
PS1 Board)..............................................38
Circuit Diagram (PS1 Board) .........................................39
Circuit Board (Amp Board)............................................40
Circuit Diagram (Amp Board).......................................42
Summary of Contents for AC-90 Acoustic Chorus
Page 4: ...4 Jul 2007 AC 90 Location of Controls fig panel eps...
Page 13: ...13 Jul 2007 AC 90...
Page 20: ...Jul 2007 AC 90 Block Diagram Wiring Diagram fig AC90 block eps L 21 20...
Page 21: ...Jul 2007 AC 90 23 Circuit Board Main XLR Board fig AC90 pcb main 01 eps L 22...
Page 22: ...Jul 2007 AC 90 25 Circuit Diagram Main Board Digital fig AC90 sch main digital eps L 24...
Page 24: ...28 Jul 2007 AC 90 Circuit Diagram Main Board Power Supply fig AC90 sch main power Sup eps...
Page 25: ...29 Jul 2007 AC 90...
Page 26: ...Jul 2007 AC 90 31 Circuit Board Jack Board fig AC90 pcb jack borad 01 eps L 30...
Page 27: ...Jul 2007 AC 90 33 Circuit Diagram Jack Board fig AC90 sch main jackborad eps L 32...
Page 28: ...Jul 2007 AC 90 35 Circuit Board Panel Board fig AC90 pcb panel 01 eps L 34...
Page 29: ...Jul 2007 AC 90 37 Circuit Diagram Panel Board fig AC90 sch main panel eps L 36...
Page 30: ...38 Jul 2007 AC 90 Circuit Board PS1 Board fig AC90 pcb PS1 eps...
Page 31: ...39 Jul 2007 AC 90 Circuit Diagram PS1 Board fig AC90 sch main power eps...
Page 32: ...40 Jul 2007 AC 90 Circuit Board Amp Board fig AC90 pcb amp 01 eps...
Page 33: ...41 Jul 2007 AC 90 fig AC90 pcb amp 02 eps...
Page 34: ...Jul 2007 AC 90 43 Circuit Diagram Amp Board fig AC90 sch amp eps L 42...
Page 35: ...MEMO Jul 2007 AC 90...
