Meridian Tuner 204 - diyAudio
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Old 22nd May 2007, 08:31 AM   #1
etsang3 is offline etsang3  Hong Kong
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Join Date: Feb 2005
Location: Hong Kong
Default Meridian Tuner 204

I have just repaired a faulty Meridian 204 Tuner (cannot be turned ON) and would like to share some photos.
Front Panel Module
http://i20.photobucket.com/albums/b2...playmodule.jpg

Change to IC socket for easy maintenance
http://i20.photobucket.com/albums/b2...dICsockets.jpg

The Logical Control Board
http://i20.photobucket.com/albums/b2...r/MPUBoard.jpg

SAA3006(RC-5) output when Button #2 is pressed
http://i20.photobucket.com/albums/b2...er/Button2.jpg

Add filter cap for lower hum noise figure
http://i20.photobucket.com/albums/b2...dfiltercap.jpg

SAA3006 and the control keys
http://i20.photobucket.com/albums/b2...6Incircuit.jpg

SAA1061 for LED display
http://i20.photobucket.com/albums/b2...061display.jpg

Display Module connection to front panel
http://i20.photobucket.com/albums/b2...nelconnect.jpg
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Old 13th March 2009, 04:33 AM   #2
smitsch is offline smitsch  Switzerland
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Join Date: Sep 2008
Hi There

i've got same issue here - did u replaced only the both SAA's ? or is the display module also affected ? (i have a newer design on PCB, do not need to unsolder it for IC change)

- what should i check before i plug the Mains?

thanks for any help, Mitsch
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Old 10th December 2009, 06:12 AM   #3
hew128 is offline hew128  Singapore
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Join Date: Jan 2006
Location: Singapore
Hi,

I recently replaced the battery on my 204 and initially it acts as if it was dead. Then after the battery charges up, works fine when coupled to my 201.
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Old 10th December 2009, 11:10 PM   #4
smitsch is offline smitsch  Switzerland
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Join Date: Sep 2008
Yep,
my Meridian 204 tuner is also working again, but it was more then just the Battery to replace...it was:
key driver chip, display driver chip and even CPU!

i have a scheme as pdf if anyone needs it...

CPU: if there is something like in between Hi and Lo (+/-3V) on Busses, it has to be replaced...

a fine tuner who is worth to be repaired...i like it, but if anybody wants it, i cold even sell it...

stay FM!
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Old 11th December 2009, 12:05 AM   #5
hew128 is offline hew128  Singapore
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Join Date: Jan 2006
Location: Singapore
Hi,

Please sent the PDF to hew128@hotmail.com

Don't suppose you have the RC5 codes for the 209 as well?

Many thanks!
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Old 11th December 2009, 09:37 PM   #6
smitsch is offline smitsch  Switzerland
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Join Date: Sep 2008
i will do, but for now until January 4th im travelling...be patient...
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Old 24th February 2010, 01:43 AM   #7
smitsch is offline smitsch  Switzerland
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Join Date: Sep 2008
Default scheme!

this is what may help! good luck! sorry, no rc- codes...
Attached Images
File Type: jpg 204MK2ccts_1.jpg (538.6 KB, 157 views)
File Type: jpg 204MK2ccts_3.jpg (139.0 KB, 119 views)
File Type: jpg 204MK2ccts_2.jpg (475.2 KB, 111 views)

Last edited by smitsch; 24th February 2010 at 01:51 AM. Reason: better pics
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Old 24th February 2010, 09:49 AM   #8
etsang3 is offline etsang3  Hong Kong
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Join Date: Feb 2005
Location: Hong Kong
Hi Smitsch, Thank you very much indeed. Have a nice day.
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Old 5th March 2011, 04:08 PM   #9
dray177 is offline dray177  France
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Join Date: Apr 2008
Quote:
Originally Posted by smitsch View Post
Yep,
my Meridian 204 tuner is also working again, but it was more then just the Battery to replace...it was:
key driver chip, display driver chip and even CPU!

I have a scheme as pdf if anyone needs it...
Many Thanks SMITSCH for your contribution ( your schemes ).

My Meridian is out of order :
- display panel with erratic functions
- battery NiMh < 0,5 volt
I will do changing to solve ( hope it the reason of troubles ).

Raymond
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