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T ECHNICAL INFORMATION
Models No. DC1850
W
PRODUCT
P1/4
Description Charger
CONCEPTION AND MAIN APPLICATIONS
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 H
* Battery 1250 12V/1.3Ah for model MT061 and MT063 L
* Battery 1450 14.4V/1.3Ah for model MT064
* Battery 1850 18V/1.3Ah for model MT065
Dimensions : mm ( " )
The finish of charging process is sensed by thermostat.
Length (L) 169 (6-5/8)
The batteries to be charged with DC1850 are limited to Width (W) 86 (3-3/8)
1.3Ah Ni-Cd batteries. Refer to the list at page 2. Height (H) 75 ( 2-15/16 )
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Input Output Max. Output (W)
110 - 120 50 - 60 45
220 50 - 60 45
230 - 240 50 - 60 45
Output voltage (D/C) 9.6 V, 12 V, 14.4 V, 18 V
Output current (D/C) 1.4 A
Charging time Approx. * 60 min. Approx.* 60 min.: This figure may be changed depending
Net weight: kg (lbs) 1.3 (2.9) on the condition of battery or room temperature.
Cord length: m (ft) 2.0 (6.6)
< Note >
Because of these ribs, MAKTEC brand batteries
Features and benefits (9050, 1250, 1450, 1850) can be inserted into
MAKTEC brand machines/chargers only.
Groove for MAKTEC batteries
(9050, 1250, 1450, 1850)
Distinctive
orange color
for
Charging lamp:
MAKTEC
Charging lamp lights up in red color
during charge and it will go out when
the charging process finishes.
Battery 1850, 18V / 1.3Ah Battery 1450, 12V / 1.3Ah
Interchangeability
Battery for MAKTEC
series models
Charger for the existing
MAKITA models Battery for the existing
Distinctive orange color
for MAKTEC series model MAKITA models
Equipped with over current protector Battery for MAKTEC
Charger for MAKTEC series models
series models Battery for the existing
MAKITA models
Comparison of products ( Charger ) P2/4
Model No. Maktec Makita
Specifications. DC1850 DC1803
Out put voltage : V 9.6 - 18 9.6 - 18
Maktec 1.3 Ah 60
Ni-Cd
Charging time
1.3 Ah 60 30
Makita
2.0 Ah 45
Maktec 2.2 Ah 50
Ni-MH 2.6 Ah 60
Makita
3.0 Ah 70
Maktec Ni-Cd 9050, 1250, 1450, 1850
Batteries to be charged
9120 9100, 9000, 7000, 7002,
Ni-Cd 1220, 1200, 1210, 1200A 9002, 9120 9100, 9000,
1420 9102, 9102A, 9122,
Makita Ni-Cd 1220, 1200, 1210, 1200A
1202, 1202A, 1222
1420, 1422
1822
7033,
9033, 9133 9134, 9135,
Ni-MH
Ni-MH 1233, 1234, 1235,
1433, 1434, 11435
1833, 1834, 1835
Length (L) : mm 169 201
Dimensions
(") (6-5/8) (7-7/8)
Width (W) : mm 86 105
(") (3-3/8) (4-1/8)
Height (H) : mm 75 78
(") ( 2-15/16 ) ( 3-1/16 )
Net weight : Kg (lbs) 1.3 (2.9) 0.48 (1.1)
Comparison of products ( Battery )
Battery
14.4V 18V
Maktec Makita Maktec Makita
Specifications. Battery 1450 Battery 1420 Battery 1850 Battery 1822
Capacity : Ah 1.3 1.3 1.3 2.0
Type of cell Ni-Cd Ni-Cd Ni-Cd Ni-Cd
Repair P3/4
< 1 > Replacing inner parts
Unscrew 4 pcs. of tapping screws and remove charger case as illustrated in Fig. 1.
Fig. 1
Charger
case
Tapping
screws
( 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.
After passing the lead wires,
inflect them for easy connecting and
connect to the new circuit board
by soldering as this illustration.
Transformer
Make sure, that the 2 lead wires Circuit board
are not short circuited each other
by the solder of overflow.
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".
Repair P4/4
( 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.
Thermistor-acceptance
Charger case
Thermistor
Tapping
screws
Fig. 4