Marantz SR4000 Service Manual - Page 26

7B-2 TUNER ADJUSTMENT TABLE ( ECO5 FM/MW- and FM/MW/LW - versions with AM-frame aerial ) Waverange Input frequency VARICAP ALIGNMENT FM 87.5 - 108MHz (65.81 - 74, 87.5 - 108MHz) MW FM/AM-version, 10kHz grid 530 - 1700kHz FM/MW-version, 9kHz grid 531 - 1602kHz LW 153 - 279kHz MW FM/MW/LW- version, 9kHz grid 531 - 1602kHz FM IF FM 10.7MHz, 50mV continuous wave FM RF Input Tuned to Adjust Output Scope/Voltmeter 108MHz 5130 87.5MHz (65.81MHz) check 1700kHz 530kHz 5123 check 1602kHz 5123 531kHz check 1 279kHz 5122 153kHz check 1602kHz 5123 531kHz check IC 7101 21 F shortcircuit 2141 5119 2 to block AFC 8V ±0.2V 4.3V ±0.5V (1.2V ±0.5V) 8V ±0.2V 1.1V ±0.4V 6.9V ±0.2V 1.1V ±0.4V 8V ±0.2V 1.1V ±0.4V 8V ±0.2V 1.1V ±0.4V 0 ± 3 mV DC FM 87.5 - 108MHz (65.81 - 74, 87.5 - 108MHz) VCO FM 108MHz 87.5MHz (65.81MHz) A mod=1kHz ∆f=±22.5kHz 98MHz, 1mV continuous wave A 108MHz 87.5MHz (65.81MHz) 98MHz 2155 5131 3142 4 MAX 3 152kHz ±1kHz 1) max. AM IF IC 7101 36 C 100nF 5111 220R MW AM AFC MW AM RF 3) 450kHz 4 ∆f=±15kHz IC 7101 40 connect pin 6 of VRF = 3mV see IC 7101 (AM Osc.) remark 2) 220R 100nF 5112 with short wire to ground (pin 4) C continuous wave 5114 2 VRF = 10mV MW 4) FM/MW/LW- and FM/MW-version ( 9kHz grid) 531 - 1602kHz LW 1494kHz 558kHz 198kHz B 1494kHz 2106 558kHz 5102 198kHz 5103 4 fo symmetric 0 ± 2 mV DC max. MW FM/AM-version, 10kHz grid 530 - 1700kHz 1500kHz 560kHz ∆f = ±30kHz VRF as low as possible 1500kHz 560kHz 2106 5102 fo symmetric Use service test program. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically. ECO5, discr. coil, 090797 1) If sensitivity of frequency counter is too low adjust to max. channel separation (input signal: stereo left 90% + 9%, adjust output on right channel to minimum) 3) For AM RF adjustments the original frame antenna has to be used ! 2) RC network serves for damping the IF-filter while adjusting the other one. 4) MW has to be aligned before LW. Repeat 7B-2 TUNER ADJUSTMENT TABLE ( ECO5 FM/MW- stereo versions with AM-frame aerial ) Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter VARICAP ALIGNMENT FM 108MHz 5130 8V ±0.2V 87.5 - 108MHz FM Japan 76 - 90MHz plus Ch1 95.75MHz, Ch2 101,75MHz, Ch3 107.75MHz MW FM/AM-version, 10kHz grid 530 - 1700kHz MW FM/MW-version, 9kHz grid 531 - 1602kHz 87.5MHz check 107,75MHz 5130 76MHz check 1 1700kHz 5123 530kHz check 1602kHz 5123 531kHz check 4.3V ±0.5V 8V ±0.2V 2.4V ±0.5V 8V ±0.2V 1.1V ±0.4V 6.9V ±0.2V 1.1V ±0.4V FM IF FM 10.7MHz, 50mV IC 7101 21 continuous wave F shortcircuit 2141 5119 2 to block AFC 0 ± 3 mV DC FM RF FM 87.5 - 108MHz FM Japan 76 - 90MHz plus Ch1 95.75MHz, Ch2 101,75MHz, Ch3 107.75MHz VCO FM 108MHz 87.5MHz 107.75MHz 76MHz A mod=1kHz ∆f=±22.5kHz 108MHz 87.5MHz 107.75MHz 76MHz 98MHz, 1mV (83MHz for Japan) continuous wave A 98MHz (83MHz for Japan) 2155 5131 2155 5131 3142 5 MAX 3 152kHz ±1kHz 1) AM IF IC 7101 36 C 100nF 5111 220R max. MW 5 ∆f=±15kHz IC 7101 40 220R 450kHz VRF = 3mV see 100nF 5112 remark 2) AM AFC MW connect pin 6 of IC 7101 (AM Osc.) with short wire to ground (pin 4) C continuous wave VRF = 10mV 5114 2 IF stereo module MW 100nF E 50R ∆f=±15kHz VRF = 1mV 5240 4 AM RF 3) fo symmetric 0 ± 2 mV DC max. max. MW FM/MW-version, 9kHz grid 531 - 1602kHz MW FM/AM-version, 10kHz grid 530 - 1700kHz 1494kHz B 1494kHz 2106 558kHz 558kHz 5102 4 1500kHz ∆f = ±30kHz 1500kHz 2106 560kHz VRF as low as possible 560kHz 5102 fo symmetric Use service test program. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically. ECO5 AM stereo, discr.coil 090797 1) If sensitivity of frequency counter is too low adjust to max. channel separation 2) RC network serves for damping the IF-filter while adjusting the other one. (input signal: stereo left 90% + 9%, adjust output on right channel to minimum) 3) For AM RF adjustments the original frame antenna has to be used ! Repeat