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1. Initial Product Test

Note: Before taking the unit apart or performing any repair process, an attempt to verify the cus-

tomer complaint must be made.

1.1 Read any customer note included with the unit.

2. Attempt to verify the complaint before opening the unit or performing any repairs.

2.1 Customer complaint not verified, discuss with customer.

2.2 Customer complaint verified, troubleshoot and repair the unit. Refer to the PS28/28 Trouble-

shooting Tips/Preventative Repair Measures document.

3. Check the software revision of the unit, using the procedures on page 5, procedure 2.3.

Refer to the Bose

service extranet site, http://serviceops.bose.com for information regard-

ing the latest software revision. Update is needed.

4. Verify Performance and all functions.

Note: If a media center is available, use the procedures "With AV28 media center". if a media

center is not available, use the procedures "Without AV28 media center".

1. Audio Signal Generator.

2. Digital Converter (A-D) with S/PDIF output, if AV28 Media Center is not availble.

3. PC (IBM compatible), if AV28 Media Center is not availble.

4. DC power supply for cube phase test.

5. Audio amplifier for cube sweep test.

6. PS28/48 test cable part number 264564.

7. RCA to bare wire cables (to connect cube speakers to bass module).

Black rear cable part number 180644

Black Left/Center/Right part number 180643-4

Note: AC2 connector part number 195505-001 is needed to connect bare wire to Jewel

speaker.

Connect to computer

RS232 port

Connect to D-A

converter

PS28/48 General Test Procedures

Required Test Equipment and Cables

9 PIN D-SUB FEMALE

RCA PLUG

Test cable part number 264564

8 PIN RJ45

RJ45

8 PIN

Cube

Connect to

PS28/48 bass module