American lion and dragon amplifier, immediately turn off the boot. Suspected short circuit. Open the inspection, the amplifier section has 10 SAP08, which has two resistors vary greatly. These tranches, each two as a pair, respectively, P-type and N-type, composition of the tube. This means that five channels.Upkservice manual download site
   Now one pair damage, observe or pre-main channel, estimating the output short circuit burned out. So the rear surround sound in exchange, there is a 22 ohm resistor also burned, be replaced, returned to normal playback, but the rear is only one channel. SAP08 internal circuitry and use, you can refer SAP15, they should be Sanken family series.Upkservice manual download site