Monday, February 15, 2016

BOSE SoundTouch Wireless Adapter – air play and non air play – WiFi module test - factory reset - USB port test - disassembling – teat procedure - Audio system repair and service

Category: Audio system Repair and Service 

Contents of this article 

  • Disassembling procedure 
  • Test procedure 

BOSE SoundTouch Wireless Adapter 

1. Top Cover Removal
1.1 With the unit upside down, remove the three screws that secure to two halves of the enclosure together.
1.2 Lift off the bottom enclosure. It will come off with the Wi-Fi PCB assembly mounted in the bottom of it, attached to the I/O board with two ribbon cables. The I/O PCB assembly is mounted to the upper enclosure plastic.

2. I/O PCB Assembly Removal
2.1 Perform procedure 1.
2.2 Remove the two screws that secure the I/O PCB assembly to the upper housing. Lift out the board.
Note: Retain the connector scrim and the reset button scrim for re-use.
2.3 Disconnect the Bose link cable at J201. Disconnect the ribbon cables and J200 and J300.
Note: The Bose link cable is not easily replaceable. It comes as a service part, included with the top housing, pressed in place.

3. Wi-Fi Module PCB Removal
3.1 Perform procedure 1.
3.2 Remove the one screw that secures the Wi-Fi board to the bottom housing. Lift out the PCB assembly.
3.3 Disconnect the two ribbon cables at J1201 and J1203.
Note: Due to complexity, the Wi-Fi module PCB assembly is not repairable at the component level. If you suspect it has failed, you will need to replace the board.

Note: The SoundTouch wireless adapter is powered by +12 over its Bose link cable. You will need to connect the wireless adapter to a compatible SoundTouch product such as an SA-4 amplifier, Stereo JC music system bass module or a Lifestyle SoundTouch media center in order to provide power to it for the following tests.
TAP command setup
Equipment Required:
# Computer w/serial port
# RS232 to TTL converter
# Lifestyle ETAP Cable, P/N 264565
# SoundTouch product, SA-4 amplifier or other compatible
# TeraTerm terminal emulator
TAP commands are sent to the SoundTouch wireless adapter by connecting to the SERVICE connector on the back of the adapter. An ETAP cable and RS232 to TTL Converter are required for this communication. The ETAP cable is available from Bose  (see part number above). The RS232 to TTL Converter is made by B+B electronics, model number 232LPTTL. 
TAP commands are needed for the following procedures:
A. Wi-Fi Test
B. Serial Number Programing
C. Setting Wi-Fi Country Code
1. Tera Term Terminal USB Setup
Tera Term is a terminal emulator and can be downloaded at sourceforge  projects/ttssh2/. It is the interface used to send TAP commands to the SoundTouch wireless adapter.
1.1 Connect the SoundTouch wireless adapter to the computer.
# Connect the RS-232 to TTL converter to the COM port on the PC.
# Connect the TAP cable to the RS-232 to TTL converter.
# Plug the other end of the TAP cable into the SERVICE jack on the back of the SoundTouch wireless adapter.
# Connect the SoundTouch wireless adapter Bose link cable to the SoundTouch product.
# Connect the SoundTouch product to AC power.
2. Teraterm Setup
2.1 Launch a Tera Term terminal window and select serial communication and port
2.2 Select setup, then serial port to set the
baud rate to 115,200 data to 8 bit, parity to
none, stop to 1 bit and flow control to none.
3. Test TAP Communication
3.1 Enter TAP command “sys ver”. The system will respond with the software version similar to: BoseApp version: epdbuild.rel_1.x.hepdswbld05.2013-06- 18T15:50:19.
Functional Tests
Note: The SoundTouch wireless adapter is powered by +12 over its Bose link cable. You will need to connect the wireless adapter to a compatible SoundTouch product such as an SA-4 amplifier, Stereo JC music system bass module or a Lifestyle SoundTouch media center in order to provide power to it for the following tests.
1. Wi-Fi Functional Test Set Up
This test uses TAP commands to connect the product to a Wi-Fi network and stream audio from a Bose . The Bose SoundTouchTM application can be used in place of this test.
Note: Do not download the audio file from the test URL. Determine the security type for your router and select the appropriate TAP command for connecting to a Wi-Fi Router (WEP, WPA, or no security).
2. Connecting to a Wi-Fi Router
2.1 Enter the following TAP command for your router security type setting. Do not enter parentheses.
2.1.1 WEP Security Type  airplay wep profile (SSID) (Password)
2.1.2 WPA Security Type airplay wpa profile (SSID) (tkip or aes) (Password)
2.1.3 No Security airplay Wi-Fi profile (SSID)
2.2 Wait for the Wi-Fi indicator LED on the back of the unit to turn white. This may take up to a minute. While the unit is connecting, it will flash amber. If the indicator does not turn white, enter the TAP command again.
3. Testing the Wi-Fi Module.
3.1 Enter the following TAP commands. Press the <enter> key on your keyboard after each command. You should see an OK response in the Tera Term dialog box. sys configuration DemoAudioURL audio/take5.mp3 <enter> sys configuration DemoNetworkEnabled true <enter> demo enter <enter>
3.2 The song “Take 5” should play. Listen for clean undistorted audio.
3.3 Enter the following TAP command to exit the Wi-Fi test. demo exit <enter>
Note: A Tera-Term macro that includes these TAP commands is available for download on the product’s repair information page. Place the macro file in the same folder as your Tera-Term program. Open Tera-Term, select Control, Macro, wifi_test.ttl. Once the macro runs, follow the prompts.
4. Factory Default Unit
4.1 Enter the TAP command sys factorydefault <enter>
4.2 Provide the customer instructions for reconnecting their system to their Wi-Fi network. Download the instructional sheet on the product’s repair information page.
5. USB Port Test
5.1 Connect the SoundTouch wireless adapter to a computer as shown in the TAP command set up documented.
5.2 Type the command “local_services on” and <enter>. Then press CTRL-C on the keyboard. Then type “e” and <enter>. The command line lisa login: should be displayed on the computer.
5.3 Type the command “root” and <enter>. The command line should be root@lisa:root#.
5.4 Connect a USB thumb drive to the USB port located on the back of the product.
5.5 Type the command “lsusb”.
5.6 Verify the unit responds with the name of the USB thumbdrive. Sample response - Bus 002 Device 002: ID 0781:5151 SanDisk Corp. Cruzer Micro Flash Drive.
5.7 Send the command “rm /mnt/nv/ local_services” and <enter>.
5.8 Send the command “exit” and <enter>. This will return to the TAP interface (CLI) and a TAP command line “->” should be shown.
6. Micro USB Port Test
6.1 Using a micro USB to standard USB cable, insert the micro USB end of the cable into the SoundTouch connector labeled SETUP A (micro USB). Plug the other end of the cable into a USB port on a computer. Ensure that cable is properly seated.
6.2 Open your device manger and look under Network Adapters. You should see the SoundTouch Wi-Fi adapter as an adapter.
Directions: On your computer, click on Start and navigate to Run. In the window that opens, enter “mmc devmgmt.msc”. The device manager will open. In the device manager, expand the network adapters, you should see the SoundTouch wireless adapter as an adapter.
7. Ethernet Connector Test
7.1 Insert an Ethernet cable into the Ethernet connector on the SoundTouch system. Connect the other end of the cable to the router.
7.2 The LED lights on the product’s Ethernet connector should light up yellow and green after a few seconds indicating that the connector is functioning.