Meridian Tuner 204

[etsang3]

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/b206/etsang3/Meridian 204 Tuner/CN1displaymodule.jpg

Change to IC socket for easy maintenance
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/AddICsockets.jpg

The Logical Control Board
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/MPUBoard.jpg

SAA3006(RC-5) output when Button #2 is pressed
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/Button2.jpg

Add filter cap for lower hum noise figure
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/Addfiltercap.jpg

SAA3006 and the control keys
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/SAA3006Incircuit.jpg

SAA1061 for LED display
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/SAA1061display.jpg

Display Module connection to front panel
http://i20.photobucket.com/albums/b206/etsang3/Meridian 204 Tuner/Keypanelconnect.jpg

 

[smitsch]

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]

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]

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]

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]

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

 

[smitsch]

scheme!

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

 

[etsang3]

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

 

[dray177]

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

 

[ds2aaw]

Pattern was lost while repairing PCB due to battery leakage. What is the connection of this pattern?

Microsoft OneDrive - Access files anywhere. Create docs with free Office Online.

We would appreciate if you could show the EPROM pattern picture.

 

[Kaufman2019]

Meridian 204 FM Tuner - RF Input is loose, need screw type, and possibly a pin

Hello,
I love my Meridian 204 FM Tuner (and 508.20->.24 CDP).
My RF Input is loose and I disassembled the unit and a screw and pin appear to be missing.
Could someone please check their 204 and tell me what the screw type, thread type/pitch and if there is a pin to the left of the RF Input, and if so what size the pin might be?
I’m new and appreciate all the help from fellow audio enthusiasts.
Thank you, K