Important Notes When Replacing Parts - Roland ME-25 Service Notes

Feb. 2010
Important Notes When
Replacing Parts
The specifications of each of the parts described below have changed as of
production number B**1350. Pre-modification parts must not be used in
combination with modified parts.
• Main Board Assy (#********)
• Key Unit (#5100011393)
• 7 Seg Cover (old: #5100012842 -> new: #5100002398)
Replacement of the Main Board Assy
The Main Board Assy is included in the Main Sheet Assy (#5100009941). The
part code before and after modification is unchanged. To distinguish new and
old items, check the revision number on the circuit board, or refer to the
photos below.
Note that only the modified Main Board Assy is supplied for service use.
Accordingly, when replacing a pre-modification Main Board Assy, also replace
the Key Unit and 7 Seg Cover with the modified items at the same time.
fig.main-b-old-e.eps
Lens-equipped LEDs (#05015956)
Pre-modification Main Board Assy
fig.main-b-new-e.eps
Chip-type LEDs (#5100006346)
Modified Main Board Assy
8
Replacement of the Key Unit
For the Key Unit as well, the part code before and after modification is
unchanged (#5100011393). To distinguish the new and old items, refer to the
following figures.
Note that only the modified Key Unit is supplied for service use. Accordingly,
when replacing a pre-modification key unit, also replace the Main Board Assy
and 7 Seg Cover with the modified items at the same time.
fig.keyunit-old-e.eps
Stamp: G2497028R0
Pre-modification Key Unit
fig.keyunit-new-e.eps
Stamp: G2497028R1
Modified key unit
Replacement of the 7 Seg Cover
The part code for the 7 Seg Cover before and after modification is unchanged.
To distinguish the new and old items, refer to the following photos.
Note that both the pre-modification and 7 Seg Cover and the modified 7 Seg
Cover are supplied for service use.
fig.7seg-cover-old.eps
Pre-modification 7 Seg Cover
fig.7seg-cover-new.eps
Modified 7 Seg Cover
ME-25
Equipped with lenses