Roland 074021E19, Service Notes, Page: 2 / 59

Jan. 2012
CAUTIONARY NOTES
2
Note: Specifications are subject to change without prior notice.
Cautionary Notes
according
Before beginning the procedure, please read through this document. The matters described may differ
to the model.
About Disassembly Operations
DIGITAL KEYBOARD BK-5 Series
•To prevent accidents, when performing disassembly of the unit, be sure
to first switch off the power to the unit and unplug the power cord.
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 ******** 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).
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
components indications, but no are mounted.
230VE
117V U/CS
230V EU
100V
117V US
117V BL
BK-5
074021E32
074021E49
074021E65
074021E28
074021E59
074021E22
074021E19
074021E26
240VA
220V CN