Yamaha CS-50 Servicing Manual page 57

OUTPUT AMPLIFIER AND HEADPHONE AMPLIFIER
OUT
II
Fl~
I
PA
't
' " "fr
Input signal
~
12
_._
I~
....
+15 ciS
'IS
+ 15
-15
--15
L__j
Delay circuit Output amplifier
Headphone amplifier
• Delay Circuit
Transistors 5 and 6 turn conductive for about 5 seconds after the moment when the POWER switch is turned ON
to lead the noise and unstable sound signal in the transient state to the ground. The delay time is determined by
the 47 pF/16V capacitor and 100 k.Q resistor.
• Output level Adjustment
The maximum output level should be adjusted by VR6 to 0±1 dBm p-p at the HO terminal and -18±3dBm p-p at
the LO terminal.
• Headphone Amplifier
When a headphone (8.11 load) is connected, this circuit provides the maximum PH output level -6±2dBm p-p.
48--------------~-----------------------------------------------------