Sharp SD-EX101 Service Manual - Page 15

TEST MODE When the tuner test mode is set, the initial setting of frequencies is stored in the preset memory as shown in Table 1. For details, refer to "4. Tuner test" on page 19. The frequencies registered by the user will be changed when the below setting is performed. Preset Memory M1 M2 M3 M4 M5 Frequency FM Preset Memory 87.5 MHz M6 108.0 MHz M7 90.0 MHz M8 106.0 MHz M9 98.0 MHz M10 Table 1 Memory setting Frequency AM 530 kHz 1,720 kHz 600 kHz 1,400 kHz 990 kHz To clear registered stations Canceling the test mode will clear all the preset data. SD-EX100 SD-EX101 Adjustment for 1 bit amplifier output offset voltage Adjust VRA100 and VRA101 so that the voltage between the positive and negative terminals of the speaker output terminal (JK400) is within 0±5mV at AC 120V. AC 120V Output Speaker Terminal + UNIT - VR : 0 JK400 Input:AUX Electric Voltmeter Figure 15-1 OUTPUT OFFSET LEVEL 1-BIT AMP. PWB VRA100 L-CH OUTPUT OFFSET VRA101 R-CH OUTPUT OFFSET Figure 15-2 ADJUSTMENT POINT CD SECTION A built-in auto adjustment of this CD system does not require readjustment after pickup replacement. You can freely mix and match PWB and pickup. Auto adjustment is performed for each disc to realize optimum playback. - 15 -