Onkyo TX-DS474 Service Manual - Page 13

fX-DS474 ADJUSTMENT PROCEDURES Preparation 1. Input 2. Outputs FM mono: lkHz,75kHz devi.,60dB/ it V Connect the non-inductive type resistor of 8 ohms FM stereo: 1kHz, 75kHz devi., 60dB/ ft V to the all speaker terminals unless otherwise noted. Pilot signal 19kHz 7.5kHz devi. AM: 400Hz, 30% mod. FM Item Step ofCo.innsntercutmioennt FM SG output Stereo modu- Tuning Output Adjustment lator output frequency indicator point Adjust for Remarks 1 FM 2 Fig.• 1l 99.0MHz IkHz 75kHz devi. 65dBf(60dB) 3 DC voltmeter 99.0MHz AC voltmeter Dainsatol yrztieorn L141 IFT on the front end L142 0 -±20mV Maximum Minimum FM MUTE/MODE switch:ON/STEREO Repeat the steps 1 and 3 until no further adjustment is necessary. Stereo Distortion Fig.2 99.0MHz Ext. Channel L mod.65dBf(60dB) or R 1kHz 99.0MHz Distortion analyzer IFT on the front end Minimum Don't turn more than ±1800 . 1 S tereo Separation 2 Muting Level Fig.2 Fig.3 99.0MHz Ext. mod. 65dBf(60dB) Channel L Channel R 1kHz 99.OMHz AC voltmeter R167 Channel R 1kHz Channel L AC voltmeter 99.0MHz 19. 2dBf (14dB) Oscilloscope 99. OMHz or TUNED R141 indicator Minimum Minimum Maximum and same separation Signal output or light on AM 120V model Step AM SG output 1 Tuning Frequency 530kHz Output Indicator Digital DC voltmeter 600kHz AC 2 400Hz 30% mod. 600kHz 60dB/m voltmeter 999kHz 3 400Hz 30% mod. 990kHz 60dB/m AC voltmeter 230V and worldwide models Step AM SG output Tuning Frequency 522kHz 1 or 531kHz Output Indicator Digital DC voltmeter 603kHz AC 2 400Hz 30% mod. 603kHz 60dB/m voltmeter 999kHz 3 400Hz 30% mod. 999kHz 60dB/m AC voltmeter Adjustment point OSC coil on RF block L171 RF coil on RF block L171 Adjust for 1.4±0.2V Maximum L172 Maximum Adjustment point OSC coil on RF block L171 RF coil on RF block LI71 Adjust for I.4±0.2V Maximum L172 Maximum -24- Reference Specification FM tuned voltage: 87.5141z-108.On More than 1.3V-Less than 9.0V AM tuned voltage: 530kHz-1710kHz 1.4±0.5V-Less than 9. Reference Specification FM tuned vol Cage: 87. Mt-10& 0111z more than I.3V -Less than 9V PM tuned voltage: 522kHz-1611kHz i. 4±0.2V-Less than 9.OV (230V model) AM tuned voltage: 531kHz-1602kHa 1. 4±O. 2V-Less than 9.OV OVorldwide model)