Makita Maktec DC1851 Leitfaden

P 1/ 5

Model No.

Description

CONCEPT AND MAIN APPLICATIONS

Specification

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 150 (5-7/8)

100 (3-15/16)

65 (2-9/16)

Model DC1851 is a maktec charger developed specially for

charging new slide-style Li-ion batteries.

New maktec Li-ion batteries model L1451 (14.4V-1.1Ah)

and model L1851 (18V-1.1Ah) can be charged approximately

in 60 minutes. Also, the Makita brand Li-ion batteries designed

with the same concept, model BL1411G (14.4V-1.1Ah) and

model BL1811G (18V-1.1Ah) can be charged.

In order to achieve a cost-competitive advantage, this charger

is not equipped with:

• Optimum Charging System

• Forced air-cooling system

Also note that it is not compatible with:

• ADP01 Interchangeable adapter

• ADP02 Refreshing adapter

• ADP03 Automatic refreshing adapter

• ADP04 Interchangeable adapter

PRODUCT

DC1851

Charger

Continuous Rating (W)

Voltage (V) Cycle (Hz) Input Output Standby power (W)

100 - 240

220 - 240

110 - 120

Current (A)

50/60

50/60 41

0.3

*The charging time may depend on various conditions such as room temperature,

the condition of battery, etc.

Output voltage

Output current

Charging time*

DC 14.4 - 18V

DC 1.65 - 1.1A

approx. 60 min.

Protection against electric shock Double insulation/ Grounding

Weight according to

EPTA-Procedure 01/2003: kg (lbs)

Power supply cord: m (ft)

0.35 (0.77)

2.0 (6.6)

TECHNICAL INFORMATION

Standard equipment

Optional accessories

P 2/ 5

Repair

[1] DISASSEMBLY/ASSEMBLY FOR DC1851

[1] -1. Terminal unit and Charger case complete

Fig. 1

CAUTION: Disconnect the charger from the power source for safety before repair/ maintenance!

DC1851 has two different kinds of specifications. Distinguish them by name plate

“DC1851” and “DC1851 U” and follow each insturction. Do not use the different

parts in repair.

DISASSEMBLING

1. Turn Charger upside down and remove

four tapping screws.

2. Turn Charger over again and open Charger case complete

from rear side.

Charger case complete

Terminal unit

Charger case cover

*Open from

this side

Replace Charger case complete as drawn in Figs. 1 and 2.

Note: Terminal unit is fully integral with Charger case complete.

When it is necessary to replace Terminal unit, replacing

Charger case complete and Charging condition label is required.

Fig. 2

Charging circuit Connector

3. When replacing Charger case complete;

(1) By pinching Push mount tie, remove it from Charging circuit.

(2) Remove Connector from Charging circuit.

Push mount tie

Pinch both levers of Push mount tie

when pulling it off from Charger circuit.

Tapping screws

Indication of DC1851

P 3/ 5

Repair

[1] DISASSEMBLY/ASSEMBLY FOR DC1851

[1] -1. Terminal unit and Charger case complete (cont.)

Fig. 3

1. Set Connector on Charging circuit as drawn below.

Then insert Push mount tie into the hole of

Charging circuit until its levers are fixed in the hole.

3. Assemble Charger case complete to Charger case cover.

Be sure to securely tighten four tapping screws.

ASSEMBLING

Assemble Charger case cover and Charger case complete as drawn in Fig. 3.

Charging circuit

Push mount tie

Connector

Power supply cord

Charger case cover

[1] -2. Replacing Varistor and Fuse

(1) If the cause of Battery charger trouble is the breakage of Varistor and Fuse, you need not replace

Charging circuit, but simply replace Varistor and Fuse.

Sign of Varistor breakage:

Cracks exists in the surface of Varistor.

Cause of Varistor breakage:

Charger is plugged in a power source of two times or more than the rated voltage of Varistor.

Note: If Fuse has burned out meanwhile Varistor is not broken, something else in Charging circuit is probably

causing the trouble. In this case, replace Charger circuit.

(2) Replace Varistor and Fuse. (Fig. 4)

Fig. 4

Varistor/ Fuse is soldered on Charging circuit.

Remove a broken Varistor/ Fuse with soldering iron.

And solder new one with soldering iron.

Fuse

Varistor

2. Push Lead wires firmly between the ribs and

the wall of Charger case cover.

P 4/ 5

Repair

[2] DISASSEMBLY/ASSEMBLY FOR DC1851 U

[2]-1. Terminal unit and Charger case complete

DISASSEMBLING

Replace Charger case complete.as drawn in Figs. 5 and 6.

Important: After disconnecting the charger from the power source, wait more than 5 minutes before repairing work.

Fig. 5

1. Turn Charger upside down and remove

four tapping screws.

2. Turn Charger over again and open Charger case complete

from rear side.

Charger case complete

Charger case cover

*Open from

this side

Note: Terminal unit is fully integral with Charger case complete.

When it is necessary to replace Terminal unit, replacing

Charger case complete and Charging condition label is required.

Terminal unit

Tapping screws

Indication of DC1851 U

ASSEMBLING

Assemble Charger case complete to Charger case cover by

reversing the disassembly procedure.

Be sure to push Power supply cord firmly between the ribs

and the wall of Charger case cover as drawn in Fig. 7.

Fig. 6

Fig. 7

Charging circuit Connector

Power supply cord

3. Hold the connector on Charging circuit and pull up the connector.

P 5/ 5

Repair

[2] DISASSEMBLY/ASSEMBLY FOR DC1851 U

[2] -2. Replacing Varistor and Fuse

Neither Varistor nor Fuse is supplied for the repair.

When they have damages, replace Charging circuit with a new one.

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