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Test Setup Parameters and Equipment
Use the dissasembly/assembly procedures found in the AM25/30P Series II service manual part
number 230-90374.921, to access the PCBs.
Speaker Output Loading:
Load the ouputs only when testing the bass module for its rated power output. To reduce
overheating of the outputs all testing should be done with the ouputs unloaded.
Left Front Output:
Right Front Output:
Center Output:
Left Surround Output:
Right Surround Output:
Bass Channel Output:
Equipment Requirements:
- A terminal emulator or in Microsoft
- A SPDIF digital signal source or a DVD player, or item 4 in below table
- Audio signal generator, oscilloscope, dB meter and a multi-meter
- Items listed in the following table
Item
Number
1
2
3
4
5
Test Setup Procedure
(see Figure 45. Test Setup Diagram, located in the Appendix)
Using the test cable, part number 199527, plug the 13-pin din connector into the bassbox.
Connect the RS232 (B+B TTL232 converter) to the 25-pin D connector on the test cable.
Connect the RS232 box to its power supply.
Connect the 25-pin to 9-pin cable to your PC's serial port.
Open "Hyperterm" (used with Windows
compatible P.C.
Perform the Computer Setup Procedure located in the Appendix.
Connect an audio signal generator to the RCA input jacks on the test cable 199527.
To test the SPDIF input, connect the SPDIF output from an SPDIF converter, or from a DVD
player, to the female RCA on the test cable 199527.
To turn the bass module on, connect a 10 VDC supply (9V battery will work) to the 3.5 mm jack on
the test cable 199527.
8 Ohm, 1%, 50W
8 Ohm, 1%, 50W
8 Ohm, 1%, 50W
8 Ohm, 1%, 50W
8 Ohm, 1%, 50W
4 Ohm, 1%, 100W
®
Windows
Description
RS232 to TTL converter
Power Supply for RS232
25 to 9 Pin PC serial port cable
SPDIF Digital Signal Converter
Test Cabl
®
95 or 98) or other terminal emulator on your IBM
®
95 or 98 use "Hyperterm"
PART
Number
232 TTL
232 PS
254858
10050
199527
43
Manufacturer
B+B
B+B
Bose
Fl-Calf
Bose
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Troubleshooting
