Kenwood TK-3230 Service Manual page 35

OPTIONAL ACCESSORY (KSC-37: RAPID CHARGER)
■ Flow Chart
START
Does T contact?
Yes
Red LED with 1sec
Yes
Are output
terminals shorted?
No
Standby
temperature
LED: Red
–2°C±2°C T
42°C±2°C
Yes
Give B+ terminal power
(4.5V 60mA±20%, 5sec.)
Any output
terminal open
No
Battery voltage
Vchg 4.75V±0.1V
Vchg 1.2V±0.5V
No
Vchg 2.55V±0.1V
No
In
A1
Out
90min timer start?
No
90min
timer
stop
✽
No
Error battery
Yes
LED: Red flash...
Go to start
When T contact is off
No
Yes
Yes
Yes LED: Red
Low battery charging
170mA±20mA
Timer 90min
In
A1
Out
Yes
Yes
Timer 90min
No
Yes
Vchg 1.2V
No
✽
Rapid charge
Constant current: 1050mA±5%
Constant voltage: 4.5V±1%
for Li-ion
LED: Red, 180min timer start
Yes
Vchg 4.75V±0.1V or
Vchg 2.55V±0.1V
No
No
Vchg 4.1V±0.1V
after 10min
Yes
In
A1
Out
Yes
Timer 180min
No
Charging current
200mA±20mA
Yes
I=O
No
Vocv 4.0V±0.1V
Yes
Timer stop
Finish charge
LED: Green
Yes
Vocv 4.4V±0.1V
No
Yes
Vocv 3.65V±0.1V
Error battery
Timer stop
LED: Red flash
Does T contact?
Yes
Go to start
Charge voltage is 4.5V. It is higher than normally
max. battery voltage (Vbattery) 4.2V.
0.3V is offset voltage as the diode Vf which is in
the battery pack.
Vchg: Charge voltage at charging (Vbattery+Vf)
Vocv: Battery voltage at non-chargeing
TK-3230
In
A1
No
T 57°C±2°C or
T –2°C±2°C
No
Yes
Standby
temperature
Timer hold
LED: Red
No
–2°C±2°C T
45°C±2°C
Yes
Timer recount
Out
No
No
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