I have an old Sony LBT D505 (with a SONY TA D505 amp) its abundled system but for some reason it automatically sets source to tuner and i cant change source. I have checked the system control cables and they are fine.

yes

Hi David, do you want to connect the ST-D505 tuner to the TA-D505 amplifier?
You just have to connect an audio cable of two RCA (red and white) from the audio output L and R of the tuner ST-D505 to the input of Tuner in the amplifier TA-D505
Remember to connect the FM antennas and the AM Antenna Loop on the ST-D505 tuner
To listen to it, you have to select Tuner on the TA-D505 and enjoy the favorite radio stations
I hope you have my comments
Greetings Franco Dosil

Hola David, quieres conectar el sintonizador ST-D505 al amplificador TA-D505?
Simplemente tienes que conectar un cable de audio de dos RCA(rojo y blanco) desde la salida de audio L y R del sintonizador ST-D505 a la entrada de Tuner en el amplificador TA-D505
Recuerda conectar las antenas de FM y la Loop Antena de AM en el sintonizador ST-D505
Para poder escucharlo, tienes que seleccionar Tuner en el TA-D505 y disfrutaras de las estaciones de radio preferidas
Espero que te sirvan mis comentarios
Saludos Franco Dosil

https://elektrotanya.com/sony_lbt-d505_d505cd_d505cdm_d505m.pdf/download.html

It sounds like the output device may have failed. Check the manual it may explain it.

That is really old. Once you have tried fresh batteries there is not much more to do.

Amazingly there is one for auction on eBay. Good luck. Personally though, I would not buy it used at that price, I'd get a nice new hifi, maybe DAB radio,

http://www.ebay.co.uk/itm/Original-RM-S530-SONY-Remote-Control-Audio-system-for-HiFi-video-CD-Tuner-Tape-/200986250606?pt=UK_AudioTVElectronics_Video_RemoteControls&hash=item2ecbb6cd6e

Does the deck light-up at all, or is it completely dead? I've found that in aging tape decks, the belts will deteriorate, and change into tar. I've repaired several of the TA series Sony systems, and that's usually the case. If the deck is just 'dead,' I would recommend retrofitting standard RCA jacks on the back of the amplifier. The pins on the ribbon cable are clearly marked on the PC board inside the amp. Then, you could use any deck you want, or even a CD recorder. Hope this helps. :)

Since you have 2 receivers, you can either use the Sony STR-AV570X or the TA-AX380. You will need 3 Stereo RCA Cables to connect your CD Player, Tuner, and Tape Player. The speakers connect to the receiver you choose using the speaker input terminals.

Here is the diagram (click on picture to enlarge):




I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

SONY MHC-EX50

Het is al een paar weken verder, maar ik ben eruit: C161 en C162 (100uF/35V) in de voeding zijn slecht.
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wel 105 graden elco's gebruiken en hoger dan 35 volt, liefst 100v
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et gaat dus om een VFD (Vacuum Fluorescent Display) die geen gloeispanning krijgt. Het vervangen van C161 en C162 lost het probleem helemaal op.
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Radio: ST-EX100
Amp: TA-EX50
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Symptome=Tuner-Display zeigt nichts an, sonst Tuner OK.
Defekt=C161 und C162 (100µF,35 V) auf der Tunerplatine ersetzen.
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Wenn bei dem Sony-Tuner RDS EON ST-EX100 (z.B. zu der Anlage Sony MHC-EX5, aber auch MHC-EX 70) pünktlich eine Woche nach Ende der Garantiezeit die Beleuchtung im Display wegfällt und man deshalb leider keine Sender mehr programmieren kann, dann handelt es sich vermutlich um eine fiese Soll-Bruchstelle.

Auf der Platine des Tuners sind zwei Kondensatoren zu schwach ausgelegt und gehen zwangsweise früher oder später kaputt. Die Reparatur ist ganz einfach. Man kauft zwei neue Kondensatoren (100µF,35 V) - kosten nur ein paar Cent! - und besorgt sich einen Lötkolben. Dann schraubt man den Tuner auf, entfernt auf der Platine die Kondensatoren C161 und C162 (die sind namentlich gekennzeichnet) und ersetzt sie durch die neuen.

Your in luck there is a user guide online that has all you need to know.Here is the link

Hi juicer, If you use the switched outlet, then everything will be turned on/off when you operate the preamp power switch. Use the unswitched, then you have to turn off each unit separately. You choose which one you want. It wont matter.

What connection do you intend to use to connect the LBT zx6 to the Onkyo preamp??

How do I remove the protect mode from my Sony LBT-LX5 Stereo?