Nec vn211 vcr

[debe]

Some time ago we had 305V AC mains for about 1Hr instead of 240V AC. Result was a lot of wrecked apliances. Have found the mains bridge rectifier is burnt out & R101 2.7ohm 2W resistor. Not sure about IC101 which is the switching chip. The numbers on the chip are A6351 SK323 2045. Does any one have a circuit of the powersuply on these machines, or info on the chip. Havent been sucesful on finding any info on this chip.

 

[audioguru]

vcr?
I haven't used my vcr since replacing it with a digital Personal Video Recorder about 10 years ago. My cable TV company recently replaced it with a PVR that records 2 channels at the same time in high definition (if I want) for many hours. It records on its hard drive, not on tape.

 

[debe]

I still have a huge Video tape library. Cable TV had a short life here & was only in major citys. Other option is Satelite TV but that cost too mutch. Only cheep option is Digital TV.

 

[kimbear]

I still have a huge Video tape library. Cable TV had a short life here & was only in major citys. Other option is Satelite TV but that cost too mutch. Only cheep option is Digital TV.

Whats a VCR??
I think I have heard of 'em.......many years ago..wen dinosaurs ruled the earth

 

[bryan]

Some time ago we had 305V AC mains for about 1Hr instead of 240V AC

How does that happen?

 

[debe]

Quite easy, the local power Substation there is a Auto tap changer Transformer to maintain voltage. It apears to have changed up to maximum voltage tap & stayed there. There was major destruction of any thing electrical in the district. I only lost $800 worth of gear, some people lost a lot more.

 

[33by47]

http://www.datasheetcatalog.org/datasheets2/39/395484_1.pdf

You may also need IC102 and IC103 (LM431 Adjustable Precision Zener Shunt Regulator? **broken link removed**

 

[debe]

Hi 33by47. Thanks for that data sheet on the A6351 chip, thats exactly what ive been looking for. Ive been lucky the only damage was burnt out bridge rectifier , resistor & the large 400V electrolytic cap was cooked. Machine now works again.