2
Feb. 2010
AC-33
Cautionary Notes
Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
No User Data
This product cannot save user data. Backing up user data during servicing is
not required.
Parts List
A component whose part code is ******** will not be supplied as a service part
because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and supplied as
a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
• Because it is carried in electronic data on the Roland web site.
• Because it is a package or an accessory irrelevant to the function
maintenance of the main body.
• Because it can be replaced with an article on the market. (battery or etc.)
Circuit Diagram
In the circuit diagram, “NIU” is an abbreviation for “Not in Use,” and
“UnPop” is an abbreviation for “Unpopulated.” They both mean non-mounted
components. The circuit board and circuit board diagram show silk-screened
indications, but no components are mounted.
Updating the System
Updating the system is accomplished by replacing the Main Board.
Summary of Contents for Acoustic Chorus AC-33
Page 4: ...4 Feb 2010 AC 33 Location of Controls fig panel eps...
Page 8: ...8 Feb 2010 AC 33 Plain View 1 fig bunkaizu 1 eps a a b c b j e View 1 View 2...
Page 10: ...10 Feb 2010 AC 33 Plain View 2 fig bunkaizu 2 eps c f d d g View 3 View 4...
Page 20: ...20 Feb 2010 AC 33 Block Diagram Wiring Diagram fig block eps L A B I J K G H L M...
Page 22: ...22 Feb 2010 AC 33 Circuit Board Main Board fig b main 1 eps...
Page 23: ...23 Feb 2010 AC 33 fig b main 2 eps...
Page 24: ...24 Feb 2010 AC 33 Circuit Diagram Main Board Power fig d main power eps L...
Page 25: ...25 Feb 2010 AC 33 fig d main power eps R...
Page 26: ...26 Feb 2010 AC 33 Circuit Diagram Main Board Digital fig d main digital eps L...
Page 27: ...27 Feb 2010 AC 33 fig d main digital eps R...
Page 29: ...29 Feb 2010 AC 33 fig d main analog eps R rms 1 30Vrms 1 30Vrms 2 90Vrms 2 90Vrms ms...
Page 31: ...31 Feb 2010 AC 33...
Page 34: ...34 Feb 2010 AC 33 Circuit Diagram Panel Board fig d panel eps L...
Page 35: ...35 Feb 2010 AC 33 fig d panel eps R...
Page 36: ...36 Feb 2010 AC 33 Circuit Diagram Jack B Board fig d jackB eps...
Page 37: ...37 Feb 2010 AC 33 Circuit Diagram Phones Board fig d phones eps 0 87Vrms...
