What to do if my Bose 3-2-1GS II has no power?
If your Bose Home Theater System has no power to the system, check the transformer primary and secondary connectors. Inspect the line fuse on the I/O board and replace it if necessary. Check the power switch or dual voltage switch, if your unit has one. Also, check the resistance of the transformer primary; if it's open, the thermal fuse has likely opened, requiring transformer replacement.
How to fix no power to console on Bose 3-2-1GS II Home Theater System?
If your Bose Home Theater System console has no power, check the seating of cable 271561-190 between the DSP and I/O board. Also, check F1 on the Input/Output PCB and the console cable (269997-001).
Why is my Bose Home Theater System remote not responding?
If your Bose Home Theater System is not responding to the remote, check transistor Q1 (270841-001) on the IR board and replace it if defective. Ensure that the IR board ribbon cable is properly seated. Also, check that the ribbon cable from the button board to the main PCB at J6700 is properly seated.
How to troubleshoot no optical audio on Bose 3-2-1GS II Home Theater System?
If there is no optical audio on your Bose Home Theater System, check the optical SPDIF input connector J8000 for bent legs on the bottom of the PCB.
Why is there no analog or AM/FM audio on my Bose 3-2-1GS II Home Theater System?
If your Bose Home Theater System has no analog or AM/FM audio, but digital audio is normal, check U4000.
What to do if there is no audio on any channel of Bose 3-2-1GS II?
If there is no audio on any channel of your Bose Home Theater System, check Vraw. If it is above 18 VDC (probably 25~30V), replace Q4 FET (274550-002).
How to troubleshoot no power on Bose 3-2-1GS II?
If your Bose Home Theater System has no power, verify that the input line cord and the system cable are properly connected. Also, check U2 and U17.
Why is my Bose 3-2-1GS II Home Theater System console not initializing properly?
If your Bose Home Theater System console does not initialize properly, ensure the DVD eject pin is correctly aligned with the inner bezel plastics. Also, check that the DVD drive ATAPI cable and power cable are properly seated.
What to do if F1 on the Input/Output PCB blows on Bose 3-2-1GS II Home Theater System?
If the F1 fuse on the Input/Output PCB of your Bose Home Theater System blows, and the console is not attached, inspect the console cable for damage that may be causing shorts. If the fuse blows when the console is plugged in, check the console itself for shorts.
Why does my Bose Home Theater System audio crackle at high volume?
If your Bose Home Theater System exhibits audio crackling or breakup on program peaks at high volume, check all cables and connectors in the ground path to the console, including J150 on the DSP, cable 271561-190, and J3 & J7 on the I/O. Replace any corroded contacts as necessary. Also, check the PCB soldering to J150 on the DSP and re-solder if needed.
General| Audio Channels | 2.1 |
|---|---|
| Type | Home Theater System |
| Number of Speakers | 2 |
| Subwoofer | Yes |
| Remote Control | Yes |
| Media Playback | DVD, CD |
Procedures for testing leakage current.
Procedures for testing insulation resistance.
Exploded view of the 3-2-1 II console assembly.
Exploded view of the 3-2-1GSX console assembly.
Final resistors for the console main PCB.
Final capacitors for the console main PCB.
More transistors for the console main PCB.
Additional resistors for the console tuner PCB.
More capacitors for the console tuner PCB.
More resistors for the bass module DSP/Amplifier PCB.
Final capacitors for the bass module DSP/Amplifier PCB.
Steps to remove the front outer bezel.
Steps to remove the console's top cover.
Steps to remove the inner bezel with PCBs.
Steps to remove the tuner PCB.
Steps to remove the DVD/CD drive.
Steps to remove the hard drive assembly (GSX only).
Steps to remove the main PCB assembly.
Steps to remove the bass module's rear enclosure.
Steps to remove the bass module's main PCB.
Disassembly for standard arrays (grille/nameplate).
Disassembly for Gemstone arrays (grille/driver).
Test for analog audio input/output performance.
Test for coaxial digital audio input/output.
Test for optical digital audio input/output.
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