REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

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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..............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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 10 April 2019

BOSE SOUNDTOUCH 20 – DISASSEMBLING PROCEDURE – HOW TO REPLACE THE SPACERS – HOW TO REMOVE THE AMPLIFIER

Bose SoundTouch 20 – Disassembling procedure – How to replace the spacers – How to remove the amplifier

Bottom Cover Removal
Remove the 6 screws indicated
Lift off the bottom cover.
I/O PCB RemovalRemove the FFC from connector J606.
Remove the four screws securing the I/O PCB.
Lift up the I/O PCB and disconnect the cable harness from J610. Figure
Disconnect the FFC from J607.
Press on J605’s two connector release tabs and carefully pull out the FFC.
Side Panel RemovalGrasp the side panel and slide it upward to remove the side panel from the enclosure.
Grille and Top Cover Removal
Remove the two screws securing the grille assembly to the bottom of the matrix.
Remove the two screws, on either side, securing the grille assembly to the side of the matrix.
With the unit on its back, lift up on the lower part of the grille and rotate it backward until grille and top cover are disengaged.
Remove the FFC from the button and display PCB.
Important Note: Take ESD precautions when disconnecting the OLED display.
Button PCB Removal
Remove the four screws securing the button PCB to the top cap. Slightly lift up the foam to expose to the two screws furthest from the grille.
Remove the six screws securing the display assembly to the grille. Lift out the display assembly.
Important Note: Take ESD precautions when connecting or disconnecting the OLED display.
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.
Wi-Fi Module RemovalRemove the FFC from J902 and J802.
Remove the two screws securing the WiFi Module to the matrix and lift out the Wi-Fi Module.
Remove the FFC from J901. Press on J801’s two connector release tabs and carefully pull out the FFC.
Baffle and Driver Removal
Remove the 16 screws securing the baffle to the matrix.
The baffle gasket might cause it to stick to the matrix. Using a flat tool, slightly pry up on the top edges. Lift up the top edge of the baffle.
Note: If the baffle gasket peels away from the baffle, a new baffle with gasket should be used to prevent air leaks.
Disconnect the amp/power supply harness J200. Disconnect the driver harness connectors J302 and J303.
Remove the drivers from the enclosure. Lift out the baffle with amp/power supply PCB connected.
Amp/Power Supply PCB RemovalRemove the four screws securing the amp/ power supply shield.
Remove the two screws securing the amp/ power supply to the baffle. Lift out the amp/ power supply PCB.
Posted By: FRANK at 04:58
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