hifi engine

need YAMAHA str6180 service manual

i have problem to turn it on as it only on for a second and then off.

i disconnect pl_det, pri, prd to the board but still the same.

the voltages at each out are about 8V.+BV to the pre_amplifier is about 37, which is little low to my understanding.

anyone has SM please help me for the schematic.