Integrated Amplifier_Used semiconductors _ 2SC5198_2SA1941_AN7062P_NJM2068_TMP47C200BN
IDLING CURRENT ADJUSTMENT
Before switching the power ON, set the master volume control
to the minimum position and the balance volume to the center positions. Also
set semi-fixed resistors R755(Lch) and R756(Rch) on PCB P701 to the center
positions.
Each of the cement resistors R767(Lch) and R768(Rch) on the
PCB P701 is provided with three test points.
Connect a digital voltmeter, set for the DC voltage input, to the test
points at the two extremities of the three test points of R767 or R768.
After the setup above, switch the power ON, and adjust semi-fixed
resistors R755(Lch) and R756(Rch) on PCB P701 according to the digital
voltmeter reading. The target setting value is 10 mV(50 mA) for both the Lch and
Rch.
SCHEMATICS [CLICK ON THE PICTURES TO ZOOM IN]
SYSTEM CONTROL
