Flow Chart - Kenwood Ksc-25L Service Manual

START
Does T, S
contact? No
Yes
open/short
check
Yes
No
T 0°C or T 40°C
Temperature
check
Give +B terminal power
8.65V, 60mA, 5 second
Yes
VB >8.85V
No
Are output Yes
terminal shorted?
No
Battery distinguish
Voltage and Above 8.55V or Below 0.5V
open/short
Below 5.8V
check
Above 5.8V
About 5.8V
180min. timer stop
Rapid charge
Constant current
945mA
Constant voltage
8.4V
180min. timer start
LED: Red
Detected full charge
Finish charge
timer stop
Above 8.85V
Below 7.6V LED: Green
A1
A1
Error battery
Timer STOP
LED: Red Flash
No
Does T, S
contact?
Yes
GO to START

FLOW CHART

Error battery
LED: Red Flash
Go to START
when T contact is off
Stand-by
temperature
0°C T 40°C
LED: Red
A1
Low voltage battery
charge: 150mA
180min. timer start
LED: Red
A2
No
A3
Yes
VB >8.85V VB >8.85V VB >8.85V VB >8.85V
5.5V >VB
A2
100mA
A2
A3
A2
T 57°C or timer recount
T 0°C 0°C T 45°C
0°C T 45°C
timer recount
Stand-by temperature
timer hold
LED: Red or Green
KSC-25L
Li-ion : Vs = VB , when Battery is not in charger set.
Vs = 1/3 VB, when Battery is in charger set.
Therefore Ni-Cd/Ni-MH voltage must consider Vf
of protected reverse connection diode.
charge condition and on temperature stand-by condition.
Error battery
timer stop
LED: Red Flash
Go to START
when T contact is off
Stand-by temperature
timer hold
LED: Red
T 0°C Times 2
T 57°C
A3 Count times
Times 2
T 45°C
Stand-by temperature
timer recount
Total 120min.
3