Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Tuesday 5 March 2019

BOSE SOUNDTOUCH PORTABLE – DISASSEMBLING – TEST PROCEDURE – SOFTWARE UPDATE PROCEDURE – SHIP MODE – AUDIO SYSTEM REPAIR AND

BOSE SoundToucH Portable – Disassembling – Test procedure – Software update procedure – Ship mode – audio system repair and

Category: Audio System repair and Service

Contents of this article

Disassembling procedure
Test Procedure
Software update procedure

BOSE SoundToucH Portable

DISASSEMBLY PROCEDURE

1. Grill removal

1.1 Remove the two screws located on the bottom of the product using a standard 2.5mm allen key. Bose part number 349601-0025.

1.2 Push the rear cover down and lift upward to release

1.3 Remove the two screws securing the grille assembly.

1.4 Push the grille assembly down and lift upward to release. Then remove the cable from the Wi-Fi Module to the display board connector J200.

Important Note: Take ESD precautions when connecting or disconnecting the OLED display. Refer to page 5 for ESD precautions.

Important Note: The display assembly must be replaced with the display assembly listed in the main part list. There are different OLEDs that need to match the display PCB. The display assembly listed in the main part list uses a matched OLED and display PCB

2. End Cap Removal

2.1 Remove the two screws holding the end caps to the enclosure.

2.2 Push each end cap down to release the hooks holding them in place.

3. Rear Cover and Top Cap Removal

3.1 Remove the three screws holding the

rear cover. Then remove the two screws

holding the top cap.

TEST PROCEDURES

SoundTouch Portable Digital Music

System Functional Tests

Equipment Required

Audio Signal Generator

Notes:

1. Begin the test with the volume set to zero.

2. Confirm the Audio Signal Generator output is set to zero volts before connecting.

1. Air Leak Test

1.1 Connect the audio signal generator to the mini jack AUX input on the back of SoundTouch Portable

1.2 Set the signal generator output to:

A. Voltage = 0V

B. Frequency = 80Hz +/- 10%

1.3 Press the power button on the SoundTouch Portable, and select AUX input. Press and hold the volume plus button for 15 seconds, this should set the system to max volume.

1.4 Set the Signal generator output to:

A. Input Voltage = 0.06 Vrms +/- 10%

B. Frequency = 80Hz +/- 5Hz

1.5 Listen for air leaks around all the cabinet seams, joints, and wire harness throughholes.

PASS if no audible air leaks can be heard at a distance of less than 1ft (0.3M) from any exterior surface of the enclosure.

FAIL if any air leaks can be heard at a distance less than 1ft (0.3M) from any exterior surface of the enclosure.

2. Left / Right Driver Test

2.1 Apply an input signal to the SoundTouch left channel only. Set the generator as in step

1.4 except set the frequency to 800Hz and confirm that only the left driver plays.

2.2 Reduce the generator output to zero volts

2.3 Repeat step 3.1 for the right channel.

2.4 Reduce the input signal to zero volts and reconnect the right channel.

3. Frequency Sweep Test

3.1 Set audio signal generator to:

A. Voltage = 0.120 Vrms +10%

B. Sweep range = 70Hz - 3KHz +10%

3.2 Execute the sweep for a minimum of 3 seconds up and 3 seconds down.

3.3 Listen for any extraneous noises such as buzzes, rattles, ticks, and distortion.

PASS if no noise can be heard at a distance of less than 1ft (0.3M).

FAIL if any noise can be heard at a distance less than 1ft (0.3M).

3.4 Reduce the input signal to zero volts.

SOFTWARE UPDATES

SoundTouch Portable Digital Music

Software Update using a USB flash drive

This procedure describes using a thumb drive to update the SoundTouch Portable software. The software file is available on the Technical Services website.

Software updates can also be done with a key press once the product is connected to the internet via a Wi-Fi network. To update using the Wi-Fi network, press and hold “volume -” and “preset 4”.

Equipment Required

1. USB Flash Drive

2. USB A Female to Micro B Male Adapter

1. USB Flash Drive

1.1 Download the latest version of software from the Technical Services Website.

1.2 Place the software on a USB flash drive.

1.3 Connect the USB flash drive to the Micro USB A connector on the back of the system using the adapter cable described above.

1.4 Press and hold the AUX button for 12 to

14 seconds to reset the system.

1.5 Within a second of releasing the AUX button to reset the product, press and hold the “Volume -” and “preset 1” until the hand with a lineshows on display

The hand will continue to be displayed until

the software update is complete. The product will then reboot and start up normally.

1.6 Press and hold “volume -” and “preset 5” to see the system information. Scroll through the menu using the volume - and + buttons to confirm the software has been updated. Bose Application Firmware under the SoundTouch Information shows the systems software version.

4. SoundTouch Information

4.2 Bose Application Firmware

SHIP MODE

1. Entering Ship Mode

1.1 Connect the SoundTouch Portable to a computer as shown in the TAP command set up documented on pages 24 and 25. A prompt (->) should appear within the Tera Term window when boot up is complete.

1.2 Remove power from the SoundTouch Portable. Power must be removed prior to typing the TAP command in the next step.

1.3 Type TAP command “ba s” then press enter. Once the command in entered, the system will be in ship mode and will not “wake up” until power is reapplied.

1.4 Confirm the system does not respond to any button presses.

Note: For products that have the potential of staying in ship mode for an extended period of time - make sure the the battery charge level is between 30 and 70%.