Resetting Phenomenon Often Occurs During Operation; Operation Lamp Flashes And Timer Lamp Off - Fisher FSArt-70HF Service Manual

9.4 Resetting phenomenon often occurs during operation.

(That is automatically entering to the status when power is on.)
The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the following procedure:

9.5 Operation lamp flashes and Timer lamp off.

33