Meridian Tuner 204

etsang3 · 22nd May 2007, 08:31 AM

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

smitsch · 13th March 2009, 04:33 AM

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

hew128 · 10th December 2009, 06:12 AM

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.

smitsch · 10th December 2009, 11:10 PM

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!

hew128 · 11th December 2009, 12:05 AM

Hi,

Please sent the PDF to hew128@hotmail.com

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

Many thanks!

smitsch · 11th December 2009, 09:37 PM

i will do, but for now until January 4th i´m travelling...be patient...

smitsch · 01:51 AM

this is what may help! good luck! sorry, no rc- codes...

etsang3 · 24th February 2010, 09:49 AM

Hi Smitsch, Thank you very much indeed. Have a nice day.

dray177 · 5th March 2011, 04:08 PM

Quote:

Originally Posted by smitsch

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

22nd May 2007, 08:31 AM	#1
etsang3 diyAudio Member Join Date: Feb 2005 Location: Hong Kong	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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13th March 2009, 04:33 AM	#2
smitsch diyAudio Member 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

10th December 2009, 06:12 AM	#3
hew128 diyAudio Member 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.

10th December 2009, 11:10 PM	#4
smitsch diyAudio Member 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!

11th December 2009, 12:05 AM	#5
hew128 diyAudio Member 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!

11th December 2009, 09:37 PM	#6
smitsch diyAudio Member Join Date: Sep 2008	i will do, but for now until January 4th i´m travelling...be patient...

24th February 2010, 09:49 AM	#8
etsang3 diyAudio Member Join Date: Feb 2005 Location: Hong Kong	Hi Smitsch, Thank you very much indeed. Have a nice day.

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