Other values not indicated on schematic are:



R31 = 1 KOhm 
R35 = 100 KOhm 
R40 = 3.3 KOhm 
R34 = 100 KOhm 
R36 = 3.3 KOhm 
R39 = 8.2 KOhm 
R43 = 2.2 KOhm 
R25 = 1 KOhm 
R20 = 3.9 KOhm 
R37 = 2.2 KOhm 
R55 = 56 KOhm 
R26 = 2.2 KOhm 
R27 = 2.2 KOhm 
R28 = 1.2 KOhm 
R29 = 910 Ohm 
R13 = 4.2 KOhm 
R24 = 2.2 KOhm 
R11 = 3.3 KOhm 
R12 = 3.3 KOhm 
R41 = 510 Ohm 
VR1 = 2 KOhm 
C18 = 4.7 uF 
C20 = 10 uF 
C12 = 2.2 uF 
C10 = 1 uF 
C13 = 4.7 uF 