Schematy są ale można wysilić się i zrobić kolorowy skan i o większej rozdzielczości. Wtedy schematy płytek będą czytelniejsze. Całość super jako wartość merytoryczna. Wszystkie dane potrzebne do podłączenia różnego rodzajów urządzeń takich gramofon, CD itd.
jedyne do czego mogę mieć zastrzeżenie to jakość zdjęć zawartych w przesłanej instrukcji serwisowej ponieważ są fatalnej jakości, praktycznie nieczytelne. tak poza tym jestem zadowolony to jest to czego szukałem.
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SECTION 2 ELECTRICAL ADJUSTMENTS
Note : 1. Use transmitter with check and adjustment already completed. 2. Thetransmittersectionadjustmentsshouldbecompletedbefore performingtheheadphonessectionadjustment. 3. On adjusting the headphones section, use the transmitter as a jig. Headphones MDR-RF430 MDR-RF450 Setting : Transmitter TMR-RF450R Separation check and adjustment 1. Set the transmitter channel to CH2. 2. Set the transmitter noise filter SW to OFF . 3. Input a signal of 1kHz 316mVrms to onl y the transmitter L-c h (J403). 4. Connect an digital voltmeter (AC range) and oscilloscope to the L-ch speaker outputs (both sides of MDD01). 5. Receive signals b y turning the TUNING VOL (RV302). 6. Adjust the VOL (RV301) so that the RX boar d L-c h speaker outputs (both sides of MDD01) are 155mVrms. 7. Connect an digital voltmeter (AC range) and oscilloscope to the R-ch speaker outputs (both sides of MDD02) and measure thevoltages. 8. At this time, check to make sure the level separation of L-ch and R-ch speaker outputs is more than 20dB. If the separation is less than 20dB, turn R V303 on the RX boar d so that the R-c h output is minimal, then check to see if the level separation of Lch and R-ch speaker outputs is more than 20dB. 9. Input a signal of 1kHz 316mVrms to onl y the transmitter R-c h (J402). 10. Adjust the VOL (RV301) so that the RX boar d R-c h speaker outputs (both sides of MDD02) are 155mVrms. 11. Connect an digital voltmeter (AC range) and oscilloscope to the L-ch speaker outputs (both sides of MDD01) and measure thevoltages. 12. At this time, check to make sure the level separation of L-ch and R-ch speaker outputs is more than 20dB. Connection points and Adjustment Location : RX board (See page 5)
AF OSC L-CH (J403) 1kHz 316mVrms (�7.8dB) Jig ATT Transmitter 600 � J404 power supply (DC 11V)
1. Feed a signal to jig (transmitter) and connect a power supply to DC IN 9V jack (J404). Receive frequency check and adjustment 1. Set the transmitter channel to CH2. 2. Set the transmitter noise filter SW to OFF . 3. Input a signal of 1kHz 316mVrms to onl y the transmitter L-c h (J403). 4. Placetransmitterandheadphonesatadistanceofmorethan5m apart. 5. Set the VOL (RV301) to MIN. 6. Position RX boar d TUNING VOL (RV302) to the center . 7. Connect a digital voltmeter (DC range) and an oscilloscope between IC301 pin @¡and GND. 8. First check to make sure that a demodulated waveform of 1kHz (appr oximatel y 13mVrms) is outputted to the oscilloscope , then chec k to make sure the DC v oltmeter reading is DC 1�1.2V . 9. If a demodulated waveform of 1kHz is not outputted to the oscilloscope or if the DC level is not within the range specified above, adjust the RX board L301 so that a demodulated waveformof1kHzisoutputtedtotheoscilloscopeandwhilethewaveform is outputted, further fine adjust the L301 so that the DC voltmeter reading is DC 1.1V . 10. Whencompleted,makesuresignalscanbereceivedwhenswitching the transmitter channel to CH1 or CH3 by turning RX board TUNING VOL (RV302). Connection points and Adjustment Location : RX board (See page 5)
