Electronic Circuit Diagram for repair
R2 ............... 56K
R5 ............... 330K
VR ............... trimport 100K
C1 ............... 33pF
C2 ............... 22uF/10V
C3 ............... 100nF
C4 ............... 4,7uF/10V
C5,6 ............. 20nF
C7 ............... 100uF/10V
Q1 ............... 9012
Q2 ............... 9013
IC1 .............. UM 3483/MB 683
S1 ............... Push on Sw
SP ............... 8 ohm