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Electronics => Repair => Topic started by: spike47 on August 04, 2021, 05:53:35 pm

Title: Akura Retro Phono n BT Player AITVS550 BTRB
Post by: spike47 on August 04, 2021, 05:53:35 pm

Hi have been given a couple of Akura Retro Phono n BT Players and of course they don't work, where do I start to test voltages etc on it, getting 5vdc out of transformer and to the board, the battery is giving out 3.7vdc , don't realy know where to test for any voltages , tried to find a schematic etc for it, but no luck up to now.
Spike
Attachme

Title: Re: Akura Retro Phono n BT Player AITVS550 BTRB
Post by: spike47 on August 04, 2021, 08:11:01 pm

Exactly the same has these

https://vinylrestart.com/victrola-vs-crosley-turntable-comparison/

Title: Re: Akura Retro Phono n BT Player AITVS550 BTRB
Post by: spike47 on August 05, 2021, 08:54:23 am

IC's as in order left to right as per pic uploaded:
1st: top 28pin, BK3254SS28B
2nd: top 8pin, HT135T
1st: bottom 6pin, B6286T
2nd: bottom 16pin, YD3412

Title: Re: Akura Retro Phono n BT Player AITVS550 BTRB
Post by: spike47 on August 05, 2021, 08:57:27 am

On one of them the charging light comes on and a blue ( bluetooth ) led comes on then blinks and I can connect my phone to it, but then after a short time it goes off and only the charging light remains on, but no activity with the turntable motor activating !.
on the other one no lights come on .

cheers
Spike

Title: Re: Akura Retro Phono n BT Player AITVS550 BTRB
Post by: spike47 on August 06, 2021, 08:22:04 am

New
Found the same burnt out chip on both boards .
4054, Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

spike