Check the line rectifier, filter element, no leakage, short circuit phenomenon, switch tube VT801 intact, unplug the demagnetizing coil is still burning fuse. Y6Tservice manual download site
Based on the protection principle of the machine, and analyses the machine caused by burning fuse is a doubler rectifier protection circuit action. Unable to boot to measure dc voltage, the resistance method is adopted to around may cause protection components. In a one-way road test SCR VS805 breakdown not damaged, VD805 normal, R814 no resistance larger or open circuit phenomenon, but the measured bidirectional thyristor VS804 positive and reverse resistance were 0 Ω. With the same SCR after replacement, troubleshooting.Y6Tservice manual download site