Symptoms to two-channel sound-no, because the owner charged with hair swept clean turntable removable case made the sound box makes a lot of "AI-photo" sound, power amplifier immediately become silent when smoking. Apart machine shell, and power observation amplifier machine around channel audio output magnetic sucking, and only left channel magnetic sucking has sucking collection action, and right channel magnetic sucking no sucking collection action, and good obviously right channel has fault components, and will around channel amplifier Board split Xia, and appearance check right channel amplifier Board has a only 10 Europe/1W resistance and a only 150 Europe/1W resistance and another a only 220 Europe potentiometer has serious burn Coke, and again by a Kung Fu, and check out left channel four only amplifier tube has breakdown open (models for 2SA1095 and 2SC2565 each two only) , And right channel four only amplifier tube has breakdown short-circuit (models for 2SA1095 and 2SC2565 each two only), and also has 4·7 Europe/1W resistance 2 only, and 47 Europe/1W resistance 1 only has open, and promoted level has two only field effect tube has short-circuit (models for K2139 and J768), and replaced above damaged components, and boot, and around channel audio output magnetic sucking 7 seconds Hou sucking merged makes amplifier machine no-load output 5 minutes, and hand touch around channel radiator temperature liters for zero, and official entered sound source signal, and Observe right channel level meter include the balance, find the right channel low level, right channel level adjustment potentiometer to balance the level meter around, then it's sound booths, boot, left and right audio booths make good music ... ..., the left radiator temperature normal, troubleshooting.JMsservice manual download site