Text From Manual (Computer Extracted)
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ECHNICAL INFORMATION PRODUCT T P 1 / 4 DC1803 Models No . Description Charger L CONCEPT AND MAIN APPLICATIONS Both of Ni . Cd and Ni . MH MAKITA batteries H from 7.2V to 18V can be charged with this DC1803 . Its features and benefits are ( 1 ) Approx . 10 - 20 minutes shorter charging time in comparing with DC1801 . ( 2 ) Maintenance ( trickle ) charging system keeps the full charged condition for 24 hours , even if the battery is left in this charger after finishing of charging process . W Dimensions : mm ( " ) Length ( L ) 201 ( 7 - 15 / 16 ) Height ( H ) 78 ( 3 - 1 / 16 ) 105 ( 4 - 1 / 8 ) Width ( W ) Specification Input Voltage ( V ) Cycle ( Hz ) Current ( A ) 50 / 60 75W 110 120 50 / 60 75W 75W 50 / 60 220 50 / 60 75W 230 50 / 60 75W 240 18 Output voltage ; V ( DC ) 7.2 9.6 12 14.4 2.6 Output current : A for 1.3 Ah Ni - Cd battery Approx . 30 for 2.0 Ah Ni - Cd battery Approx . 45 Charging for 2.2 Ah Ni - MH battery Approx . 50 time : min . Approx . 60 for 2.6 Ah Ni - MH battery for 3.0 Ah Ni - MH battery Approx . 70 < Note > The above figures about charging time may differ from condition to condition on batteries ' temperature or room temperature .
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P 2 / 4 Features and benefits Both of Ni . Cd and Ni - MH MAKITA batteries from 7.2V to 18V can be charged . See the list below . Approx . 10 - 20 minutes shorter charging time in comparing with DC1801 . See " Comparison of Product " at P . 3 Chargeable batteries 7.2V 9.6V 12V 14.4V 18V Type and Charging battery battery battery battery battery capacity time : min . - Cd 7000 9000 9100 1200 1200A 1420 1.3Ah Approx . 30 Ni 9120 1210 1220 7002 9002 9102 1202 1202A 1422 1822 2.0Ah Approx . 45 9122 1222 Approx . 50 2.2Ah 7033 9033 9133 1233 1433 1833 - MH Approx . Ni60 2.6Ah 9134 1234 1434 1834 Approx . 70 2.2Ah 9135 9135A 1235 1235A 1435 1835 Ideal charging system in this class with the following installations 1 Controlling by micro computer : The installed micro computer perceives the full charged condition , and control the optimum way to stop the charging process , from the followings . A ) Minus delta V system : Stop the charging process with perceiving the battery's voltage drop . B ) Delta T system : Stop the charging process with perceiving the change of battery's temperature . ( This system is applied to only the charger of 4 terminal - type . ) C ) T system ( Timer ) : Stop the charging process with perceiving the battery's temperature which is input in the micro computer in advance . For instance the charging process is to be stopped at 45 ° C for 1.3Ah battery , at 60 ° C for 1.7 - 2.0Ah battery and 65 ° C for 2.2 - 3.0Ah battery . D ) Timer system : Stop the charging process in 150 minutes after starting the charge , if the full charged condition would not be perceiving with any of the above 3 systems . Minus delta V system 1 Battery's voltage T system 2 Heated battery's temperature . 1 It can not be charged Battery's voltage completely . and temperature 2 3 Battery's normal temperature Delta T in charging process system The process is stopped by delta T system . 3 Charging time Full charged line 2 Current transforming system : The built - in " High - Frequency Tranceformer " supplys the charging current as follows . 1 . Convert alternative current into direct current . 2 . Re - convert the above direct current into alternative current , however , high frequency of approx . 150 - 160 kHz in this stage . 3 . Reduce the voltage to the battery's voltage . The feature of " High - Frequency Tranceformer " is light and compact comparing with the existing trance .
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P 3 / 4 Features and benefits 3 Constant output current ( charging current ) : By keeping the output current ( Ampere ) in the constant level , it is possible to stop the charging process with perceiving the battery's voltage drop exactly . Namely it is possible to perceive the full charged condition by the above " Minus delta V system " . 4 Trickle charging mode : Continue to produce very small charging current ( approx . 40mA ) for full charged battery left in charger . Comparison of products Model No . MAKITA Specifications DC1803 DC1801 Output voltage ; V 7.2 - 18 7.2 - 18 Approx . 30 Approx . 40 for 1.3 Ah battery for 2.0 Ah battery Approx . 45 Approx . 50 Charging for 2.2 Ah battery Approx . 50 Approx . 65 time : min . Approx . 60 Approx . 75 for 2.6 Ah battery Approx . 70 Approx . 90 for 3.0 Ah battery 201 ( 7 - 15 / 16 ) 201 ( 7 - 15 / 16 ) Length 78 ( 3 - 1 / 16 ) 78 ( 3 - 1 / 16 ) Dimensions : mm ( " ) Width Height 105 ( 4 - 1 / 8 ) 105 ( 4 - 1 / 8 ) < Note > The above figures about charging time may differ from condition to condition on batteries ' temperature or room temperature . Repair < 1 > The circuit board can not be repaired , because the circuit itself are molded on the board . It has to be replaced as a set 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 has broken or has become black , and fuse ( F1 ) has been disconnected , 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 . In case of no damaged varistor but disconnected fuse ( F1 ) , the charger can be broken for other reason . The circuit board has to be replaced in this case . ( 2 ) How to find broken fuse ( F2 ) a . If the charging light flashes alternately red and green , when the battery has been inserted into the charger connected with power source , fuse ( F2 ) may be broken . b . If the easily conductive material other than battery would be connected with charger's terminals by mistake , fuse ( F2 ) can be easily broken by short circuit in the charger . c . In case of no damaged fuse ( F2 ) but charging light flashing alternately red and green , the charger can be broken for other reason . The circuit board has to be replaced in this case . LED1 TH1 LED2 Top view of circuit board L1 C2 T1 C1 CN1 VS1 Q1 F2 F1 Power supply cord Varistor Fuse ( F1 ) Fuse ( F2 )
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P 4 / 4 Repair ( 3 ) Replacing damaged varistor a . Varistor is assembled on circuit board with solder . Remove it from circuit board with soldering iron . Circuit board Varistor Fig . 2 When removing varistor , melt this part with soldering iron and remove varistor . b . Assemble new varistor to the circuit board by soldering . c . Cut the surplus of varistor's wire with nipper . Varistor Circuit board Less than 3mm Fig . 3 ( 4 ) 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 . Fuse Fig . 4 Less than 3mm When removing fuse , melt this part with soldering iron and remove fuse .
