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T ECHNICAL INFORMATION New Tool
For Models DC1209
Description Rapid charger
CONCEPTION AND MAIN APPLICATIONS
CONCEPTION AND MAIN APPLICATIONS
New charger to be able to charge Batteries 7.2V~12V , rapidly
in 9 minutes for the normal capacity and in 12 minutes for the
high capacity. The same detective function for full charge as
68mm
DC1215, + V,- V, thermostat are applied, so that the battery (2-11/16")
life is kep to be equivalent to that of DC1215.
135 /16")
(5-
5
mm
mm
190 1/2")
(7 -
Specifications
Voltage(V) Frequency(Hz) Consuming Power(VA)
100V 50/60Hz 250VA
Capacity
Charging time : 1.2Ah Battery approx. 9 min.
1.7Ah Battery approx. 12 min.
Very light 1.0 kg !
Switching source system is applied.
If you have inserted a hot battery just after use, it will begin charging
Electronic buzzer automatically when the battery temperature has lowered.
When charging has finished or unavailable, it informs you.
Indication charging state with red/green lights.
Indicates before charging/being charged/ charging completed/ waiting/ battery
failure..
Corresponding to High capacity battery
1.2Ah battery( ordinary capacity )... Charging time: 9 min.
1.7Ah battery(high capacity)...Charging time: 12 min.
Performance
Relation between Charging time and Charging capacity
Charging capacity(%) 100
1.2Ah battery
80 1.7Ah battery
60
40
20
1 2 3 4 5 6 7 8 9 10 11 12
Charging time(min)
Charging system
Comparing to Transformers of the equivalent input capacity, it is lighter and
smaller owing to Switching source (inverter) system using high frequency
transformer (approx.135 kHz) instead of ordinary ones(50/60Hz).
Repair
Be sure to pull out a plug from the power point in repairing.
(1) You cannot change only the charging circuit , because it has been embedded
into Charger case cover with urethane resin. When changing charging circuit,
replace Charging circuit complete (6324840).
(2) When Varistor or Fuse is broken, you can repair it according to the following
procedure without replacing Charging circuit complete.
1) How to find broken Varistor
a. If the surface of Varistor(5-mm big gray item in the Figure)has been broken or
has become black and Fuse has been cut, Varistor has been damaged.
b. Varistor may be broken when a plug is inserted into a source of 200V or so.
c. It is considered Varistor has been broken for other reasons when the surface is
not damaged and Fuse is broken. Replace Charging circuit complete.
Varistor
(6473037)
Fuse
(6527054)
Fig.1
Electric source terminal
2) Removing broken Varistor (See Fig.2)
a. Cut Varistor lead wire about 10mm above urethane resin.
b. Take off Lead wire covers , 2~3mm, with Nipper to expose the core.
Broken Varistor
Core 2~3mm
Cover
Cut
approx. 10 mm
Urethane resin (a) Base (b)
Fig.2
3) Attaching new Varistor (See Fig.3)
a. Cut New Varistor lead wires to 10mm, insert them between the left cover and
the core, about 5mm.
b. Solder right/left lead wires , being careful that they may not contact with each
other.
4) Replacing Fuse
Replace melted Fuse with a new one.
New Varistor
approx. 10 mm Soldering Soldering
(a) (b)
Fig.3