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THORENS TTA 2000 Service Seite 2

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Wiring:
0.
current supply for protection circuit
1.
speaker output (violet) +
2.
ground for protection circuit
3.+4.
speaker output (black) -
5.
amplifier stage ground
6.
current supply for amplifier stage
7.
Thorens/SAC silver cable for audio frequencies
8.-12. mains cables
13.
mains cable, black (-)
12.
mains cable, red (+)
13.
insulation hose
14. — silicone hose
Electical adjustments:
*
*
Complete circuit board
To begin with, all adjusters should be in center position.
Set operating voltage with R14. Measuring point is upper connector of fuse socket.
Set value at +53V when unit is cold.
Setting bias (left channel R8, right channel r8): Remove fuse from the amplifier
stage to be measured and connect ampere-meter. Set value at 500mA +/- 10mA.
When maximum output voltage is reached, the current consumtpion should not
exceed 2A.
When measurements are complete, insert fuse 2.5A fast blow.
The tension at C1 is 230V AC and approximately 65V in idle mode.
Internal wjring and and procedures for adjustments
Complete unit

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