RAPID CHARGER
KSC-24
SERVICE MANUAL
© 2001-5 PRINTED IN JAPAN
( )
B51-8583-00 N 1775
AC adapter
(W08-0523-15) : K
(W08-0524-15) : E
(W08-0939-05) : T
Relay terminal
(E23-1058-08) x 4
Cabinet (Upper)
(A02-3626-08)
Photo is K type.
Circuit Description
I Power Supply Section
I Charging Switch Section
1. The power supply generates constant current (1.1A)
from the input voltage (rated 15V DC) from the adapter.
2. IC101 is a DC/DC converter.
1. Q201 is a transistor that turns quick charging on and off.
2. Q202 is a transistor that turns trickle charging on and off.
3. The resistor (R204) determines the leakage current.
3. R117 is a resistor for current detection.
4. R110 and R111 are resistors for no-load voltage detec-
tion (non-load voltage : 14V).
5. IC201 is a power supply/reset IC for the microcomputer
(IC202).
I Display Section
1. LED201 is a two-color LED that indicates the charging
state.
2. Red on ............... Quick charging or warming up
Green on ............ Charging is complete
Red blinking ....... Abnormal (short terminal, short bat-
tery, or open terminal)
· Power output : 5V
· Reset output : “H” (Normal)
· After reset : “L”
I Charging Control Section
1. The microcomputer (IC202) controls the following;
· Peak detection (Detected when fully charged, pin 27 of
IC202)
Charging
The charging time for each pack is shown in the table.
Battery
Approximate
Battery
Pack
Battery Voltage
Capacity Charging Time
· Temperature control (Pin 2)
· Detection of abnormality, such as a short terminal (Pin
27)
· LED control (Red : Pin 21, Green : Pin 22)
· Trickle charging (Pin 18)
· Quick charging (Pin 17)
Type
(Volts)
(mAh)
600
(Minutes)
KNB-14
KNB-15A
KNB-16A
KNB-17A
KNB-20N
KNB-21N
KNB-22N
Ni-Cd
Ni-Cd
Ni-Cd
Ni-Cd
Ni-MH
Ni-MH
Ni-MH
7.2
7.2
7.2
7.2
7.2
7.2
7.2
40
60
1100
1100
1500
1600
1600
2100
60
80
2. X201 is an oscillator that generates clocks for the micro-
computer (4MHz).
80
80
110
KSC-24
CIRCUIT DIAGRAM
3
KSC-24
SPECIFICATIONS
Charging current ....................................... 1100 ± 150mA
Source voltage .......................................... Approx. 15V
Usable temperature range........................ 0°C to 40°C (32°F to 104°F)
Line voltage (AC adapter) ......................... 120V AC (K)
230V AC (E)
230V AC (T)
Dimensions (Body only)............................ 2-11/64 in (55mm) H x 4-1/8 in (105mm) W x 5-5/16 in (135mm) D
Weight (Body only) ................................... Approx. 180g / 6.3oz
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501, Japan
KENWOOD SERVICE CORPORATION
P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A.
KENWOOD ELECTRONICS CANADA INC.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrücker Str. 15, 63150 Heusenstamm, Germany
KENWOOD ELECTRONICS BELGIUM N.V.
Mechelsesteenweg 418 B-1930 Zaventem, Belgium
KENWOOD ELECTRONICS FRANCE S.A.
13, Boulevard Ney, 75018 Paris, France
KENWOOD ELECTRONICS U.K. LIMITED
KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom
KENWOOD ELECTRONICS EUROPE B.V.
Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
KENWOOD ELECTRONICS ITALIA S.p.A.
Via G. Sirtori, 7/9 20129 Milano, Italy
KENWOOD IBERICA S.A.
Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(A.C.N. 001 499 074)
16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia
KENWOOD ELECTRONICS (HONG KONG) LTD.
Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong
KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.
Sales Marketing Division
1 Ang Mo Kio Street 63, Singapore 569110
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