Arcam AV8 Home Theater System User Manual


 
LM337Ts. IC801 is a voltage regulator and is set for
+15V. IC802 gives -15V and its output is also used to
derive -5.1V using a Zener diode. IC803 gives a +5V
supply. R806 is used to reduce the voltage drop across
IC803 and therefore reduce heat dissipation in the part.
General Overlay / Interconnections
Refer to circuit diagram L921 sheet 9
Switch SW901 allows a “ground lift” facility. 0V_SIG is
either isolated from the chassis or tied by R901 and C912
in parallel. Header SK917 connects to the headphone jack
board. R910 and R911 provide a switched 3.3V control
signal from a 5V supply back to the micro to indicate
when headphones are connected.