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I just finished this rare Luxman SQ-202 early solid state amp with a fully recap. It works great and just needs a little fine tuning with some adjustments. I do have a service manual but there are no further informations about the adjustments. There are four trimmer in on the phono board. Two...

Hey everybody! I got a nice Tuner from Scott. Model Stereomaster 312-D. Not playing (no output) at the moment. I could track the problem back to the FM IF Amplifier board. Here the sound disappears after the output of IC304 in T304 . So, it seems to me than this part T304 is the problem...

Hello everybody. I got this Accuphase P-300 in my hands and had to rebuild the Speaker select switch and recap the boards. Situation now is a DC offset of 2,3V on each channel. Relais are working - amp is playing on both channels. Bias is around 170mV and not really adjustable. As I tested all...

Hey everybody! I just finished reworking a rare Technics/N.P. amp from 1969. A National Panasonic SU-50A which should be the first transistor amp from Technics at that time. The amp is running very good and the sound is surprisingly nice and smooth. I recapped the whole unit with new caps...

Hey everybody, I need your help with my Pioneer SA-9900. I reworked the whole amp in the last days. Replaced Caps and Transistor - like a lot of you here in this forum. So, everything works fine except for one thing I don´t have a explanation for. If the Amp runs with a source hooked up (let´s...

I got this nice little pre-amp with no further informations. It looks to me like a self made unit...!? It´s well made - the inputs are relays driven and the the jacks are in good quality. I tested it today and it works fine, if the right switch is on (green light) and the left switch (red light)...

Hello everybody, I got a pretty rare Scott 490 Amp from the beginning 70´s. It´s working fine on the HF inputs but does have a problem with the phono section. No sound at all! I already reaped the phono board with no result. It contains a unknown IC and I need an advice what this could be. I...

I own since some time a nice Scott Alpha Kombo (Alpha 1 Pre and Alpha 6 amp) and got recently a second Alpha 6 amp. On the back of the Alpha 6 is a switch STEREO/MONO - so what happened exactly when you switch the amp to Mono? My idea is to use two amp on one preamp. Possible? Maybe somebody...

Hello everybody. I got stuck with a problem in an old Rank Arena Receiver Model T2600. Somehow I can´t find the problem on the power supply board and need someone to have a look at the shematic. Situation: AC goes into to bridge correctly with 36V Output on the DC side should be +36V and...

Hello. I have a nice KC-6060 scope and had it stored for some years. It´s still working but I need to turn the intensity up all the way to get a picture. After 10 minutes the scope disappeared totally. I need to wait another 10 min. switching off the unit and then it works again a few...

Hello to everybody, have something special today. A Toshiba Receiver from 1969. Pretty rar unit with nice wodden cabinet. The inside is impressive. Toshiba spend a lot of material in this Receiver! I searched long time for a sm. Now I found one but what a surprise - no adjustment advices for...

Hello everybody, I have a vintage LLOYD´s Receiver on my table and ask myself how to adjust this baby. It´s a four channel Receiver Model B629 - or same thing a B795 - they are basically the same. There is not very much to find in the web - no manual or schematic etc. The power amps do have...

Hello - I do have a old Kenwood Console Tapedeck here for repair. It´s a KX-910 from the beginning 70s. Nice vintage sound! I own a KX-710 - the little brother and this is running just fine. My problem - I can´t find the speed adj. for the motor on the KX-910!? The KX-710 has a little...

Hello everybody! After updating several Kenwoods I started to make some experiments the last years. Mostly to get better sound out of the old units. This time I overworked my KA-9150 in a special way. After recapping the whole unit I decided to optimize the Signal Path dramatically. I did...