CCE MD-K555 Service Manual
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MD-K5554. CALIBRATION SCRIPTObs.: These procedures can be used to orientation, the factory engineering can change someitem for best application and improve the factoring process.FM RANGETunning in 87,5 MHz, adjust the coil OSC-FM (L.102) to obtain ~ 2,0 V in the tunnig voltage(terminal 28 of IC101 with resistor of 10K in serie with the voltimeter).Tunnig in 108,1 MHz, and verify if the tunnig voltage is ~ 7,1 V.The voltage values can be slightly changed to help the production.FI-FMConnect a FM sweepings generator in the FM input.Tunning the radio in 98,1 MHz.Verify the shape of curve “S”, in the pin 23 of the IC101.TRACKING FMConnect a FM sweeping generator in the FM input.The generator output must have a very low RF signal and cannot saturate the IC output (pin 23of the IC101).Tunning in 90,1 MHz and adjust the RF-FM coil (L.101) to obtain maximum output signal.Tunning in 106,1 MHz and adjust VC.102 to obtain maximum output signalAM RANGETunning in 520 kHz, adjust the OSC-AM coil (T.101) to obtain ~ 1,0 V in the tunning voltage.Tunning in 1650 kHz, and verify if the tunning voltage is ~ 6,5 V.The voltage values can be slightly changed to help the production.FI-AMAdjust an AM generator to1000 kHz with 30% of modulation in 400 Hz.Tunning the radio in 1000 kHz.Must be used a very low RF signal.If haves undesirable noises, this frequency can be displaced for + or -, together with a frequencyof generator frequency.Adjust the FI-AM coil (T.104) to obtain the maximum detected signal.TRACKING-AMIrradiate an AM sweeping to the ferrite antenna.Tunning in 600 kHz and adjust the coil ANT-AM (T.102) to obtain maximum output signal.Tunning in 1400 kHz and adjust VC.101 to obtain maximum output signal.Remake the adjust three times to obtain the best adjust point. |
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