Yamaha YW50AP Service Manual page 67

Charging method using a constant-voltage type charger
Volt meter
YES
Charge the battery until the
battery's charging voltage is 15
volts.
NOTE:
Set the charging time at 20 hours
(maximum).
Check the open-circuit voltage after hav-
ing left the battery for 30 minutes
after charging.
12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is neces-
sary.
Under 12 V --- Replace the battery.
Charging method using a constant current type charger
This type if battery charger Can not charge the MF battery.
Measure the open-circuit volt-
Charger
age prier to charging.
AMP meter
Connect a charger and AMP
meter to the battery, and start
charging.
Make sure the current is higher
than the standard charging
current written on the battery.
BATTERY INSPECTION
3-28
INSP
ADJ
NOTE:
Voltage should be measured 30 min-
utes after the machine is stopped.
NO
This type of battery charger Can
not charge the MF battery. A
variable voltage charger is rec-
ommended.