Identifying The Bf-3(T); Cautionary Notes - Roland BOSS Flanger BF-3 (T) Service Notes

Jun. 2011

Identifying the BF-3(T)

The BF-3(T) exists in two types that have different circuit structures. In this
Service Notes, the older type is called the BF-3, and the newer type is called
the BF-3A. Both have Flanger BF-3 inscribed on the pedal and appear at a
glance to be completely identical, but they can be distinguished as indicated in
the following table.
Production number
Style of component mounting
on the circuit board
System version
After identifying the type of the product being serviced, refer to the
corresponding Service Notes for information on required parts and test
methods.
BF-3: SERVICE NOTES (#17058043E0)
BF-3A: SERVICE NOTES 2ND EDITION (#17058043E1)
This version of Service Notes is for the BF-3A.
2
BF-3 BF-3A
Up through H**8560 and after
H**8559
Single-side Double-side
mounting mounting
Version 1.00 Version 2.00 or later

Cautionary Notes

Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
User Data Cannot Be Backed Up
The setting for the sleep mode is saved on the Main Board even when the
power has been switched off, but neither verification of its status (ON or OFF)
nor backing up the setting is possible. When the Main Board has been
replaced, the sleep mode is returned to its default (ON). For more information
about the sleep mode, refer to About Sleep Mode (Owner's Manual, p. 14).
No user data other than the setting for the sleep mode is saved.
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.).
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.
BF-3(T)