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Makita DC1850 Manual

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Models No.
Description
PRODUCT
TECHNICAL INFORMATION
CONCEPTION AND MAIN APPLICATIONS
Specification
P 1 / 3
DC1850
Charger
DC1850 has been developed for charging 9.6V - 18V MAKTEC
series batteries of 1.3Ah, namely for charging the following
batteries.
* Battery 9050 9.6V/1.3Ah for model MT060 and MT062
* Battery 1250 12V/1.3Ah for model MT061 and MT063
* Battery 1450 14.4V/1.3Ah for model MT064
* Battery 1850 18V/1.3Ah for model MT065
The finish of charging process is sensed by thermostat.
L
W
H
Dimensions : mm ( " )
Width (W)
Height (H)
Length (L) 169 (6-5/8)
86 (3-3/8)
75 ( 2-15/16 )
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output Max. Output (W)
220
230 - 240
110 - 120
Current (A)
50 - 60
50 - 60 45
45
50 - 60 45
Output voltage (D/C)
Output current (D/C)
Charging time
9.6 V, 12 V, 14.4 V, 18 V
1.4 A
Approx. * 60 min.
Net weight: kg (lbs)
Cord length: m (ft) 1.3 (2.9)
2.0 (6.6)
Approx.* 60 min.: This figure may be changed depending
on the condition of battery or room temperature.
<Note>
The batteries to be charged with DC1850 are limited to
1.3Ah Ni-Cd batteries.
Repair P 2 / 3
< 1 > Replacing inner parts
Unscrew 4 pcs. of tapping screws and remove charger case as illustrated in Fig. 1.
Fig. 1
Tapping
screws
Charger
case
( 1 ) Replacing circuit board
1. Disconnect the lead wires of transformer from circuit board with soldering iron. And separate old circuit board
from transformer.
2. Pass the two lead wires of transformer through the holes of new circuit board. And connect the lead wires to
circuit board with soldering iron. See Fig. 2.
( 2 ) Replacing power supply cord
1. Disconnect the lead wires of power supply cord from transformer with soldering iron. And take off old
power supply cord.
2. Pass the two lead wires of new power supply cord through the holes of transformer's terminals. And connect
the lead wires to transformer with soldering iron.
( 3 ) Replacing transformer
Refer to ( 1 ) "Replacing circuit board".
After passing the lead wires,
inflect them for easy connecting and
connect to the new circuit board
by soldering as this illustration.
Transformer
Circuit board
Fig. 2
Make sure, that the 2 lead wires
are not short circuited each other
by the solder of overflow.
Repair P 3 / 3
( 4 ) Mounting charger case
Mount charger case, with aligning the thermistor on the circuit boar with the thermistor acceptance
of charger case. See Fig. 4.
Tapping
screws
Thermistor
Thermistor-acceptance
Charger case
Fig. 4