R
epair
P 2 / 2
<1> The circuit board can not be repaired, because the circuit itself are molded on the board
with the urethane resin.
It has to be replaced completely with new one.
<2> In case of damaged varistor or fuse, they can be repaired according to the following procedure without
replacing the circuit board.
(1) How to find broken varistor
a. In case that the surface of varistor (ref. to the following illustration) has broken or has become black, and
fuse has been cut, the varistor has been damaged.
b. Varistor can be damaged easily, if the charger is plugged in a double voltage of the rating one.
c. It is considered that the varistor has been broken for other reasons, if the fuse is broken while the surface
of varistor is not damaged. In this case circuit board has to be replaced.
Fuse
Varistor
Circuit board
Charger case set
(2) Replacing damaged varistor
a. Varistor is assembled on circuit board with solder. Remove it from circuit board
with soldering iron.
(3) Replacing damaged fuse
a. Fuse is assembled on circuit board with solder. Remove it from circuit board with soldering iron.
b. Assemble new fuse to the circuit board by soldering.
c. Cut the surplus of fuse's wire with nipper.
b. Assemble new varistor to the circuit board by soldering.
c. Cut the surplus of varistor's wire with nipper.
Varistor
Circuit board
When removing varistor, melt this part with soldering iron
and remove varistor.
Varistor
Circuit board
Less than 3mm
Fig.1
Fig.2
Fig.3
Fig.4
Fuse
When removing fuse, melt this part with soldering iron
and remove fuse.
Less than 3mm
