SRS Labs SIM928 User manual

SIM928 Replacement Battery Pack Installation Instructions
Required tools: a small Philips-head screw driver
Step 1: With the front of the SIM928 facing you, open the RIGHT shell from the SIM928 by
removing the two top and the two bottom screws. The other shell should be left in place.
Step 2: Lay the SIM928 flat on the table and remove the four screws holding the battery in place.
Step 3: Pull the battery connector off the printed circuit board (not off the battery!) and gently
pull the battery out of the SIM928. The folded flat ribbon cable does not have to be disconnected
from the chassis. The battery takes up approximately one third of the space and fits in very
tightly.
The black PVC shrink wrap which holds the battery pack together fits tightly inside the
compartment. This is normal and there should be no difficulty to remove and insert a battery
pack even if there is some mechanical resistance. Care should be taken not to put stress on any of
the electronic components on the printed circuit boards.
Step 4: Insert the new battery pack into the module and fasten it in place with the four screws. It
is very important to connect the green/yellow grounding wire with one of the screws to the
closest tab!
Failure to re-connect the grounding tab can lead to an electrical hazard!
Step 5: Reconnect the ribbon cable to the printed circuit board exactly as it was removed. The
red stripe on this connector has to be oriented towards the edge of the PCB.
The flat ribbon cable on the connector is keyed with a small plastic insert. It is very
important that this insert stays in place and the cable is inserted properly into the 10 pin
connector which has a missing pin in place of the keying insert. Failure to replace the
battery connector properly on the PCB connector will result in destruction of the battery
pack and the SIM928.
Step 6: Fold the flat ribbon cable back in place and close the shell of the SIM928.
The next time the SIM928 is turned on, it will recognize the new battery and continue working as
before.
In case of a battery or interconnect failure, the display will show “bat”. The module should be

checked for proper installation of the battery pack. If it continues to fail to detect the new battery,
the SIM928 and all battery packs should be sent in for inspection.