Kenwood NX-420 K Service Manual
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NX-42019COMPONENTS DESCRIPTIONRef No. Part Name DescriptionQ403 Transistor Ripple FilterQ404 FET Switch control (Q406)Q405 Transistor DoublerQ406 FET DC switch (VCO)Q407 Transistor Buffer amplifi reQ408 Transistor RF amplifi reQ500 FET DC switch (SB2)Q501 FET Switch control (Q500)Q502 Transistor Switch control (Q504)Q503 FET DC switch (50CS)Q504 Transistor DC switch (50T)Q505 Transistor DC switch (50R)Q506,507 FET Level converterQ508 Transistor Switch control (SB1)Q509 Transistor LoadQ600 FET DC switch (SB2)Q900 Transistor DC switch (SB2)Q901 Transistor Switch control (Q902)Q902 Transistor DC switch (AF AMP)Q903 FET Switch control (AF mute)Q904 FET AF mute switchQ905 FET Level converterQ906 FET AF mute switchD100 Zener diode Over voltage protectionD102-105 Diode Antenna switchD200 Diode LimitterD400 Diode LimitterD402,403 Variable capacitncediode VCO frequency controlD404-407 Variable capacitncediode VCO assist controlD408,409 Variable capacitncediode TX modulationD410 Diode Speed upD411,412 Diode RF switchD500 Diode Receive protection (+B)D501 Diode Speed upD502,503 Diode DC/DC converterD505 Diode BypassD506 Diode Receive current preventionD900,901 Diode Receive current prevention |
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