Resistor identification in Kenwood B7 Amp

Im trouble shooting a prolem with a Kenwood B7 amp from a UD-701 component system. Does anyone have a diagram for this amp or know the value of resistor R305. Main problem is the front display does not work and the power supply toggles on and off 4 or 5 times a second. Glue on the board has become conductive also. The value or a diagram would be appreciated. Thanks in Advance.