Kenwood TS-2000, Service Manual

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32
TS-2000/X
Ref. No. Use / Function Operation / Condition
D9 Switching On when UHF RX preamplifier is on
D10 Switching On when VHF RX preamplifier is on
D11 Switching On when UHF RX preamplifier is off
D12 Switching On when UHF RX ATT is on
D13 Switching On when VHF RX preamplifier is off
D14 Switching On when VHF RX ATT is on
D15 Switching On when VHF RX preamplifier is off
D16 Switching On when VHF RX ATT is off
D17 Switching On when UHF RX preamplifier is off
D18 Switching On when UHF RX ATT is off
D19 Switching On in UHF TX mode
D20 Switching On when UHF RX preamplifier is on
D21 Switching On in VHF TX mode
D22 Switching On when VHF RX preamplifier is on
D23 Switching On when UHF is selected in the
main band
D24 Switching On when VHF is selected in the
main band
D30 Variable capacitor VHF main RX BPF tuning
D31 Variable capacitor UHF main RX BPF tuning
D32 Variable capacitor VHF sub RX BPF tuning
D33 Variable capacitor UHF TX BPF tuning
D34 Variable capacitor VHF main RX BPF tuning
D36 Variable capacitor UHF main RX BPF tuning
D37 Variable capacitor VHF sub RX BPF tuning
D39 Variable capacitor VHF main RX BPF tuning
D40 Variable capacitor VHF sub RX BPF tuning
D41 Variable capacitor VHF main RX BPF tuning
D42 Variable capacitor UHF TX BPF tuning
D43 Variable capacitor UHF main RX BPF tuning
D46 Switching On in VHF sub RX
D47 Variable capacitor UHF TX BPF tuning
D48 Switching On when VHF is selected in the
main band
D49 Switching On when UHF is selected in the
main band
D51 Variable capacitor UHF TX BPF tuning
D52 Switching VHF/UHF TX BPF selection
D53,56 Switching VHF/UHF sub local oscillator changeover
D54 Diode mixer VHF/UHF TX mixer
D57 Switching Wide/narrow switching
D58 AM detector AM detection
D59 Switching Wide/narrow switching
D63~66 Reverse current Paddle key control line
prevention
D68 Reverse current VHF/UHF TX power supply
prevention
D69 Reverse current UHF main RX power supply
prevention
D71 Reverse current UHF main RX power supply
prevention
Ref. No. Use / Function Operation / Condition
D73 Reverse current Produce VURXB by VRXB and
prevention URXB
D74 Reverse current Produce R14 by R20S and R14S
prevention
D74 Reverse current UHF RX power supply
prevention
D76 Reverse current UHF sub RX power supply
prevention
D77 Limiter VHF large input prevention
D78 Limiter UHF large input prevention
D79,80 Variable capacitor VHF sub RX BPF tuning
D81 Switching UHF RX signal line
D82 Switching RX power supply
D83 Rectifier Squelch control voltage noise rectification
D84~86 Variable capacitor VHF main RX BPF tuning
D87 Variable capacitor VHF sub RX BPF tuning
D88 Variable capacitor VHF main RX BPF tuning
D89 Constant voltage AF amplifier power supply
D90,91 Switching UHF sub RX signal line
D92~94 Switching UHF RX signal line
D95 Switching Sub RX signal line
D96 Switching VHF sub RX signal line
D97 Switching RX power supply
D100 Variable capacitor VHF sub RX BPF tuning
D98,99 Reverse current D95 control line
prevention
D101 Switching VHF sub RX signal line
D400 Reverse current Unlock signal detection (HF LO2 VCO)
prevention
D401 Variable capacitor Sub VCO1
D402 Variable capacitor Sub VCO2
D403 Variable capacitor HF LO2 VCO
D404 Switching Sub VCO1 oscillation frequency
changeover
D405 Switching Sub VCO2 oscillation frequency
changeover
D406 Variable capacitor HF LO2 VCO
D407 Reverse current Unlock signal detection (Sub VCO)
prevention
D408 Variable capacitor HF REF VCO
D409,410 Variable capacitor UHF VCO
D411,412 Variable capacitor VHF VCO
D413 Variable capacitor VHF REF VCO
D416 Variable capacitor HFLO1, VCO1
D417 Variable capacitor HFLO1, VCO3
D418 Switching HFLO1, VCO1 output
D419 Switching HFLO1, VCO2 output
D420 Variable capacitor HFLO1, VCO2
D421 Switching HFLO1, VCO2 output
D422 Reverse current Unlock signal detection (VHF VCO)
prevention
DESCRIPTION OF COMPONENTS