hifi engine

Sansui TU-55x tuner. Details of memory backup battery

Tuner is not retaining preset stations. Have looked at circuit diagram and seen a 3.2v battery (marked EP1) on the VDD line to the ic. However, this item is not shown in the parts list so has anyone any info so I can replace with a near equivalent Lithium type.



sondurum's picture

Memory backup

Hello
I have has been the same as problem , i did this replace at bellow link this better system.
Buy this battery holder at link
http://i46.tinypic.com/20zxzkz.jpg
Then buy battery code CR2430 put it inside ,you can remove the old battery its no make problem in circuit of TU-S55X dont
vory about it the batterty only backup for 8 preset station lock in memory IC.So if you use battery holder you can replace the battery when ist be come leak or poor no need at this time use the welding gun.
Here spec of Battery Holder link,
http://i46.tinypic.com/2hduqf8.jpg
BR.

Many thanks for your info and

Many thanks for your info and links. I think that I have a CR2430 battery in my workshop so I must make the effort and replace it.
Regards, Will

sondurum's picture

TU-S55X

Hello
As you can see picture the battery place i have remove it, then i fixed battery holder after this action,for welding i open new hole on PCB, for fixing battery holder the dimension of betwen old orginal pin battery is not same,when you make open
new hole ist must be use 1.5 mm max. drill-bit. you need only 1 hole open other hole is be came at the same place on PCB.
Battery holder center pin is (-) negative pin flew, outside pin (+) positive pin flew.
Good luck.
https://www.hifiengine.com/gallery/images/tu-s55x.shtml-0
If you need any Sansui parts you can use this link.
http://www.sansui-parts-shop.com/index.php?page=main
BR. Talip

TU-S55X

Just finished replacing battery. Didn't bother with fitting a battery clip, instead I used a vertical mount coin cell (CR2430) and soldered tags onto those left on the pcb after taking out the old cell. Put a dab of Dow Corning adhesive to give more support. BTW, I obtained my coin cells from the 'Small Battery Company', excellent service.
Will