UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - My Sanyo VTC-R4ME Multi-System Betacord

dj_fivos_sak · 2nd Feb 2018, 12:19 am

Hi there. Do you have any luck restoring this machine? From your pictures, I figured out that it's actually using a switching power supply on the secondary side after the main power transformer, just like my VTC 9455. Also, I noticed it has a Texas Instruments TL494CN power IC, just like the Sony SL-C7 and the VTC 9455. So my suspicion is that this IC is toast. I have attached part of the schematic of the SL-C7.

Regards,

Fivos

2nd Feb 2018, 12:19 am	#13
dj_fivos_sak Heptode Join Date: Mar 2015 Location: Lefkada, Greece Posts: 969	Re: My Sanyo VTC-R4ME Multi-System Betacord Hi there. Do you have any luck restoring this machine? From your pictures, I figured out that it's actually using a switching power supply on the secondary side after the main power transformer, just like my VTC 9455. Also, I noticed it has a Texas Instruments TL494CN power IC, just like the Sony SL-C7 and the VTC 9455. So my suspicion is that this IC is toast. I have attached part of the schematic of the SL-C7. Regards, Fivos Attached Thumbnails