2
Dec. 2005
RT-20
Cautionary Notes
Before beginning the procedure, please read through this document.
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 ******** cannot 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).
Part Replacement
When replacing components near the power-supply circuit or a heat-
generating circuit (such as a circuit provided with a heat sink or including a
cement resistor), carry out the procedure according to the instructions with
respect to the part number, direction, and attachment position (mounting so as
to leave an air gap between the component and the circuit board, etc.).
Circuit Diagram
In the circuit diagram, ‘NIU’ is an abbreviation for ‘NOT IN USE’.
The circuit board and circuit-board diagram show silkscreened indications, but
no components are mounted.
Summary of Contents for BOSS RT-20
Page 4: ...4 Dec 2005 RT 20 Location of Controls fig panel 1 2 4 3 7 11 6 5 b a 4 8 9 10...
Page 19: ...19 Dec 2005 RT 20...
Page 20: ...Dec 2005 RT 20 Block Diagram fig block L 21 20...
Page 21: ...22 Dec 2005 RT 20 Circuit Board JACK BOARD fig board jack L...
Page 22: ...23 Dec 2005 RT 20 Circuit Board PANEL BOARD fig board PANEL L...
Page 25: ...27 Dec 2005 RT 20 MEMO...
Page 26: ...MEMO Dec 2005 RT 20...
