Kenwood KSC-24 Manual Do Utilizador

RAPID CHARGER

KSC-24

SERVICE MANUAL

■ Power Supply 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.
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).
· Power output : 5V
· Reset output : “H” (Normal)
· After reset : “L”

■ Charging Control Section

1. The microcomputer (IC202) controls the following;

· Peak detection (Detected when fully charged, pin 27 of

IC202)

· 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)

2. X201 is an oscillator that generates clocks for the micro-

computer (4MHz).

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)

© 2001-5 PRINTED IN JAPAN
B51-8583-00 (N) 1775

■ Charging Switch Section

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.

■ 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)

The charging time for each pack is shown in the table.

KNB-14

Ni-Cd

7.2

  600

  40

KNB-15A

Ni-Cd

7.2

1100

  60

KNB-16A

Ni-Cd

7.2

1100

  60

KNB-17A

Ni-Cd

7.2

1500

  80

KNB-20N

Ni-MH

7.2

1600

  80

KNB-21N

Ni-MH

7.2

1600

  80

KNB-22N

Ni-MH

7.2

2100

110