if you can not found the manual check the protection resistors on the resistor surface you can read the ohm value.You must desolder the resistors and measure them with a multimeter if the value is ok.
Check the link it have a photo from these type of resistor
http://www.wellgainelectronics.com/m...-3fjs100d.aspx
The next step is to check the electrolytic capacitors (the best that you can do is to replace all of them in the power supply board the VCR is very old and the capacitors may are damaged from the age)