9. ADJUSTM ENT
The SA-9500 ll amplifier employs the same type of power amplifier assemblyin both left and right channels. Any adjustment will thus have to be identica.lin both channels,and is limited to adjustments of the idler current. 1. Disconnectthe jumper plugs,and terminate the POWER IN terminals with a 5.1k(2 resistoru. 2. Connect 8Sl resistors to the SPEAKERS A terminals, and set the SPEAKERS switch to A. 3. Turn VR, in fully a counter-clockwise. 4. Tum the POWER switch ON, and then readjust VR, so that the voltage between terminals N o . 3 ( + ) a n d N o . 9 ( ) r e a d s3 0 m V . 5. Now check that the voltage belween terminals N o . 6 ( + ) a n d N o . 1 2 ( ) r e a d s3 0 m V t 1 0 m V (in order to check the current distribution, sincethe final stages in parallel). are 6. Leave the amplifier ON for about 30 minutes, then repeat steps4 and 5. 7. Finally, apply an actual signal, and check for no crossover distortion.
