Question about Bose Wave Radio

4 Answers

Older AWR1-1W not series III

I have an AWR1-1W that won't power up, makes a loud pop when unplugged. I know the fix for the newer version of this radio is the 5vdc power supply transistor. This is the older version with the 3 AA batteries for back up not the 9VDC battery. Do you have any suggestions. I can't even find the 5vdc supply in this radio, do you have a schematic. I have schematic for the series III of this radio but not the older version. If you can offer some info I'd appreciate it. Thanks

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  • cicincorp Mar 14, 2008

    "when I have the back up" ? I don't understand what you mean. I have an older AWR1-1W Bose wave radio, NOT series III, an earlier version. The radio will not power up, it makes a loud POP when unplugged. I've checked the main power after the rectifier and I have 15VDC. I'm looking for suggestions on what else to look for. I suspect it may be the 5VDC supply like on the series III but I can't figure out where the 5VDC supply is in this earlier version. Do you have any suggestions on what to look for ?

  • cicincorp Mar 14, 2008

    ok, I didn't know that, I only have a service manual for series 3. So, do you have any suggestions as to what components to look at that could cause this problem ?

  • cicincorp Mar 14, 2008

    I've determined from other posts that it's either an open R406 or a bad Q401 (SMD located other side of the board from R402). Can anyone tell me a replacement part number for Q401 ?

  • cicincorp Mar 14, 2008

    None of these links have anything to do with Q401 in the Bose radio ???

  • cicincorp Mar 14, 2008

    This expert was no help at all. I've determined from other posts that the problem is likely Q401 (SMD transistor located under R402 on the other side of the board)but I need to find a part number for it. If anyone know the part number please let me know. Thanks

  • cicincorp Mar 14, 2008

    What 9vdc adaptor ? The Bose wave radio doesn't use a 9 vdc adaptor.

  • cicincorp Mar 14, 2008

    The 3 AA's are for power back up for the alarm clock. There is no ac adaptor, would kind of defeat the purpose of a power back up wouldn't it.

  • cicincorp Mar 14, 2008

    Fuse is good, I have voltage after the main rectifier. Not sure what an electric closet is ? I need someone with a schematic who can give me a part number for Q401.

  • cicincorp Mar 14, 2008

    It's Q401, it is on main board, I need the part number for replacement.

  • cicincorp Mar 14, 2008

    I don't understand what your saying.

  • cicincorp Mar 14, 2008

    Are you telling me if I call Bose and ask them for the part number for Q401 they will tell me OR I'll have to order it from Bose.

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4 Answers

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Q401 is listed as a Sanyo 2SC4695. It is marked "WT." It should be on the bottom of the main board, on the side with the terminals that accept the battery springs (this applies only to units with the three "AA" backup batteries, board numbers 177171 and 179551 AFAIK).

With the board upside down in front of you, the battery terminal end (with the "W" shape) should be on your left. Near the middle peak of the "W", slightly towards the front, the third transistor from the left edge of the board should be Q401, adjacent to test point M30 (the +5V supply), as well as R405 and test point Z27.

Note that the test points are just normal board vias with labels, they have no special shape or size to help you identify them. :(

If there is no +5V on test point M30, but the +12V supply on nearby test point M32 is OK, Q401 may be bad. I have successfully used an Infineon BC817 NPN AF transistor in the SOT23 package as a replacement for the original 2SC4695.

Posted on Jan 14, 2010

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  • Master
  • 818 Answers

Check the fuse, 2 see the voltage on the radio and finally check your electric closet.

Posted on Mar 14, 2008

  • 1 more comment 
  • Sergio Scalfaro
    Sergio Scalfaro Mar 14, 2008

    call 1-800-367-4008 the Bose Customer Service.
    Remember the parts that you need for speed the send of your products.
    Sergio

  • Sergio Scalfaro
    Sergio Scalfaro Mar 14, 2008

    when call the service, the same will call you what part do you need.
    Sergio

  • Sergio Scalfaro
    Sergio Scalfaro Mar 14, 2008

    i think that you have to order from bose.
    Sergio

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  • Master
  • 796 Answers

Have you tried that 9v DC adapter?

Posted on Mar 14, 2008

  • isaac johny
    isaac johny Mar 14, 2008

    i am talking about the external adapter.

    instead of using 3AA batteries you can use a external adapter right?

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  • Master
  • 1,894 Answers

When you have the back up what suggestion you are asking from us sir?

sir please be specific with what you want

Posted on Mar 14, 2008

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3 Answers

Bose AWR1-1W older version, not Series III, no power, pop when unplugged.


I've got a simillar problem... will be looking into it this weekend. U402 is supposed to be the 5Volt regulator.
The input to U402 is U401 its a 12Volt regulator.
You should check both...

Mar 14, 2008 | Bose Wave Radio

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