Service manual

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Troubleshooting
4 – 10
battery
CHECKING THE BATTERY PACK AND ITS CABLING
A malfunctioning battery pack or a bad connection between the battery pack and the power board may be the cause
of the LEDs’ failure.
CHECKING THE BATTERY PACK
Whether the battery pack functions well or not can be checked by measuring the voltage across battery contacts
BAT and GND. Figure 4-3, on page 4-7, shows the battery pack connector’s location and its associated fuse. Figure
4-4 below is the battery circuit diagram. The measured voltage should be between 9V to 16.8V. (The voltage for a
fully charged Ni-MH battery pack is around 9.6V while Li-Ion battery is around 10.8V for 3S2P or 14.4V for 4S2P.)
If the supply voltage is still not in the correct range, replace the faulty battery pack.
BATTERY CIRCUITRY
FIG. 4 - 4
Li-Ion Battery