Bose FreeSpace E4 Series II, Руководство по обслуживанию

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PART LIST NOTES
1. This part is not normally available from Customer Service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCBs are listed in the Electrical Part List.
3. This part is critical for safety purposes. Failure to use a substitute replacement with the
same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer
to the next higher assembly for a replacement part.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
• Perform work at an electrically grounded work station.
• Wear wrist straps that connect to the station or heel straps that connect to conductive
floor mats.
• Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
• Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays.
AMPLIFIER MODULE REPAIR INFORMATION
The Amplifier / Power Supply PCB assembly, part number 278982-001, originally used in the
E4 Series II amplifier is no longer available. This is due to the Tripath amplifier driver module
going obsolete.
For amplifier board related failures in the E4 Series II, the amplifier module assembly used in
the FreeSpace
®
4400 amplifier must be used as a replacement part. This requires some minor
modifications to the E4 II chassis and a kit of parts that includes adapter brackets, screws and
an EMI gasket. The entire amplifier assembly, including the heatsink, must be replaced. Refer to
service bulletin 278977-B2, located in the back of this manual as well as on the Bose
® Service
web sites at http://intranet.bose.com/tsg or http://serviceops.bose.com for more information.
Required Parts:
•
FreeSpace 4400 Amplifier Module Assembly, Bose
®
part number 301391
• FreeSpace 4400 Amplifier Module adapter kit, Bose part number 311963
Note: This procedure cannot be used on any of the E4 Series I amplifier versions. In addition,
it cannot be used on the E4 Series II Japan version, product code 036006.