Yaesu FT-51R, Technical Supplement

Page: 11 / 83

Disassembly and PCB Access
Figure
9.
D This completes the disassembly procedure, reas­
semble all units in the reverse manner, paying at­
tention to screw type and location. With the CNTL
Unit removed, the translucent keyboard mem­
brane,
PTT
or
POWER
switch covers can be
popped out for replacement if needed.
Be sure to keep the rubber gasket around the
CNTL Unit
MIC & EAR
jack, and to carefully
align it with case cut-out when reinstalling the
CNTL Unit into the case.
Lithium Backup Battery Replacement
The lithium backup battery does not normally
need to be replaced for several years. However,
to replace the cell, order Yaesu P /N Q9000627.
FT-51R Technical Suoolement
Lithium Backup
Battery BT1001
(P/NQ9000627)
D With the CNTL Unit exposed, note the tab polarity
of BT1001.
(8J
�,.,,
+Lead
oooooooooooooooooooooooooaaooooooooooooooo
DDDDOOOODDDDDDDDDDDDDDDDDDDDDDODD DDDDDDDD
-Lead
D To remove the old cell, carefully unsolder each
terminal from the CNTL Unit PCB and lift it free.
D
Mount the replacement cell in the similar manner,
observing proper polarity when installing it. Next,
peel off the adhesive backing from the plastic insu­
lating seal (P /N R7150420), and place the seal on
top of the cell.
Insulating Seal
P
/
N R7150420
Lithium Backup Battery
P/N 09000627
2-3