Modification of Tape Sends & 2 Track Return Level

All input Tape Sends are factory set to suit -10dBV equipment. If a level of +4dBu is required the output level may be changed by removing resistors R130/R131 from the Input PCB SC2970. This can be done without removing the PCB by carefully cutting the leads of the resistor above the board at the points marked as shown below.

The Master 2-Track Return can similarly be changed to suit +4dBu equipment by removing resistors R14/R17/R54/R57 from the Master PCB SC2973 as shown below. The PCB will need to be removed from

INPUT PCB SC2970

 

 

 

 

 

 

 

 

 

R24

 

 

R29

 

C14

 

 

 

 

 

 

 

 

 

 

 

 

 

R33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC1

 

 

 

 

 

C16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R27

R32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R31

 

 

 

R130

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R131

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C13

 

 

 

 

 

 

 

 

 

MASTER PCB SC2973

 

 

 

R54

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R57

 

 

 

 

 

 

 

 

 

SW5

 

R17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C46

 

 

 

 

 

 

 

 

 

 

 

R130

 

 

 

 

 

R14

 

 

 

 

 

 

 

 

R129

R125

R119

LFR3

 

R130

R131

 

CUTCUT

Remove resistors as shown

Edge view of PCB

R54

R57

R17

R14

RFR3

Page 32

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Image 34
SoundCraft Audio Mixing Console Model Spirit Studio Modification of Tape Sends & 2 Track Return Level, Master PCB SC2973