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Becker Mexico TR Mute switch not working
11/8/2008 7:27:36 PMDave Froehlich
Hello All,
I'm working on a Becker Mexico TR. When I press the seek bar, it works and stops at the next strongest stations, but it wont un-mute all the time. Also sometimes if I wait, it will un-mute. But it just takes too long. If I move keep pressing the seek button, at some point it will un mute after finding a station.
Any suggestions about what's going on?

Thanks,

Dave

11/9/2008 6:12:20 PMWarren
:Hello All,
: I'm working on a Becker Mexico TR. When I press the seek bar, it works and stops at the next strongest stations, but it wont un-mute all the time. Also sometimes if I wait, it will un-mute. But it just takes too long. If I move keep pressing the seek button, at some point it will un mute after finding a station.
: Any suggestions about what's going on?
:
:Thanks,

It sure sounds like a dirty mechanical leaf switch. Some radios have this simple mute switch. If it gets dirty it will act just that way ..
:
:Dave

11/9/2008 7:11:38 PMDave Froehlich
Warren,
So where is this switch? I have searched the radio but cannot find it in this model.

Thanks,

Dave
::Hello All,
:: I'm working on a Becker Mexico TR. When I press the seek bar, it works and stops at the next strongest stations, but it wont un-mute all the time. Also sometimes if I wait, it will un-mute. But it just takes too long. If I move keep pressing the seek button, at some point it will un mute after finding a station.
:: Any suggestions about what's going on?
::
::Thanks,
:
:It sure sounds like a dirty mechanical leaf switch. Some radios have this simple mute switch. If it gets dirty it will act just that way ..
::
::Dave

11/9/2008 11:55:12 PMWarren
:Warren,
: So where is this switch? I have searched the radio but cannot find it in this model.
:
:Thanks,
:
:Dave
:::Hello All,
::: I'm working on a Becker Mexico TR. When I press the seek bar, it works and stops at the next strongest stations, but it wont un-mute all the time. Also sometimes if I wait, it will un-mute. But it just takes too long. If I move keep pressing the seek button, at some point it will un mute after finding a station.
::: Any suggestions about what's going on?
:::
:::Thanks,
::
::It sure sounds like a dirty mechanical leaf switch. Some radios have this simple mute switch. If it gets dirty it will act just that way ..
:::
:::Dave

Don't know the model you have. If there is a mechanical switch, it might be in the motor box. See if there is any wires going from the mechanical drive motor works to the amp or detector circuits .. If not then it must be electronic mute. A dry cap would act this lazy way ass well ..

11/10/2008 12:35:53 PMDave Froehlich
Warren,
This is a spring drive. There's no motor in this set. All there is, is a reverse (or limit) switch, and the usual return solenoid. The dry capacitor makes sense. I have replaced the capacitors in the Power Supply/Amplifier section but have not yet replaced the capacitors in the tuner section. I'll replace them here and see if it helps. I think that the same relay that stops the seeking also contains the muting switch (contacts). Maybe the contacts need cleaning. I'll do both. The contacts should be cleaned as part of normal maintenance anyway.

Thanks,

Dave
::Warren,
:: So where is this switch? I have searched the radio but cannot find it in this model.
::
::Thanks,
::
::Dave
::::Hello All,
:::: I'm working on a Becker Mexico TR. When I press the seek bar, it works and stops at the next strongest stations, but it wont un-mute all the time. Also sometimes if I wait, it will un-mute. But it just takes too long. If I move keep pressing the seek button, at some point it will un mute after finding a station.
:::: Any suggestions about what's going on?
::::
::::Thanks,
:::
:::It sure sounds like a dirty mechanical leaf switch. Some radios have this simple mute switch. If it gets dirty it will act just that way ..
::::
::::Dave
:
:Don't know the model you have. If there is a mechanical switch, it might be in the motor box. See if there is any wires going from the mechanical drive motor works to the amp or detector circuits .. If not then it must be electronic mute. A dry cap would act this lazy way ass well ..

11/10/2008 4:24:54 PMEdd







Check out the mark up submitted for some possibilities.


Initially. . . . der is bin schmitt der Zugmagnet. . . or the tuning solenoid driver mechanism at the [ A ] referencing with its
R/C pair of R5-C6 [ C ], with C6 being the sole suspect of the two, IF there is fault in the full loading of the tuning solenoid.

Auto-tuning / triggering will be accomplished with your tuning relay [ B ] with its starting and stopping function of the tuning, initiated
from a DC sampling at the start of the green line path and then into the trio of DC coupled xstr amplifiers at T-401-403-403,
with the final 403 driving the relay.

On the power supply portion of the tuning system, check out filter caps [ D ] and [ E ] .

Check the trim resistor R404 [ F ] for sensitivity / delay setting.


Pee Ess. . . .Wherein doth this Liliputian, magnificient engineering marvel (for its time) reside, perchance, posssibly, within the dash environs of some classic Mercy Days ?



Working Schema Thumbnail:

(FIO. . . .S-3 Solenoid return switch )




73's de Edd



11/10/2008 7:52:44 PMBob E
Edd.
You must have a lot of fun working up your "schemas"
and responses...
This spot, if not educational, is certainly entertaining by the submission of your posts.
My friends (not radioheads) just would not understand it. :O)
Keep up your excellent service to all of us who do not
have a clue :O)
Bob
11/14/2008 9:47:08 AMDave Froehlich
Edd,
I cannot find "beckerschemaiijm5.png". It doesn't appear here in the forum and cannot be found elsewhere. Please re-post the picture.

Thanks,

Dave
:
:
:
:
:
:
:
:
:
:Check out the mark up submitted for some possibilities.
:
:
:Initially. . . . der is bin schmitt der Zugmagnet. . . or the tuning solenoid driver mechanism at the [ A ] referencing with its
:R/C pair of R5-C6 [ C ], with C6 being the sole suspect of the two, IF there is fault in the full loading of the tuning solenoid.
:
:Auto-tuning / triggering will be accomplished with your tuning relay [ B ] with its starting and stopping function of the tuning, initiated
:from a DC sampling at the start of the green line path and then into the trio of DC coupled xstr amplifiers at T-401-403-403,
:with the final 403 driving the relay.
:
:On the power supply portion of the tuning system, check out filter caps [ D ] and [ E ] .
:
:Check the trim resistor R404 [ F ] for sensitivity / delay setting.
:
:
:Pee Ess. . . .Wherein doth this Liliputian, magnificient engineering marvel (for its time) reside, perchance, posssibly, within the dash environs of some classic Mercy Days ?
:
:
:
:
:
:Working Schema Thumbnail:
:
:(FIO. . . .S-3 Solenoid return switch )
:
:
:
:
:
:
:
:
:73's de Edd

:
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11/14/2008 11:35:48 AMEdd







Hmmmm. . . .that do be velly, velly strange. . . . for I am sitting here after just successfully pulling it upon on three different

interconnect modes, via . . . .Explorer,"Godzilla” and even Netscape.


Here is a full and valid direct URL I.D. for its routing:

Here. . .HERE. . . I'm right 'CHERE



Bob Eeeeeeeeeee:

Thank yuh, Thank yuh. . . . .thank yuh very much. . . .a la Elvis-esque.



73's de Edd







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