Kenwood NX-900 Service Manual page 24

NX-900
Ref. No. Part Name
IC707 IC
IC708 IC
IC709 IC
IC710 IC
IC711 IC
IC713 IC
IC714 IC
IC715 IC
IC716 IC
IC717 IC
IC718 IC
IC719 IC
IC720 IC
Q1 Transistor
Q2 FET
Q4 Transistor
Q5,6 FET
Q7,8 FET
Q9 Transistor
Q10 Transistor
Q11 FET
Q150 FET
Q151 FET
Q201,202 Transistor
Q203 Transistor
Q204,205 Transistor
Q208 Transistor
Q212 Transistor
Q401 Transistor
Q402 Transistor
Q403 Transistor
Q404 FET
Q405 Transistor
Q406 FET
Q407 Transistor
Q408 Transistor
Q409 Transistor
Q410 FET
Q411 Transistor
Q412 Transistor
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COMPONENTS DESCRIPTION
Description
RXAF/RXEI switch
AF switch (TXO/TXI)
SUM AMP
(AI/TONE/MI1 MI2)/(MOD/DI)
AF switch (AI TONE OPT9/VREF)
SUM AMP (AF)/VREF
AO switch
Level shift
AF power AMP
1st mixer
DSP
AND (CLKX0/SCK1)
D/A converter
DI SMF
Ripple fi lter
LNA
Ripple fi lter
VCO
T/R switch (VCO)
Buffer AMP (VCO)
Buffer AMP (RF)
Buffer AMP (19.2MHz)
TX pre-drive AMP
TX drive AMP
Switch (W/N)
2nd Local buffer AMP (x3)
1st IF AMP
Buffer AMP (Local)
Wide/Narrow switch
Switch
(Over DC supply protection)
DC switch (SB)
DC switch (IGN)
DC switch (SB)
DC switch (SCTAM1)
DC switch (33BU)
DC switch (80T)
DC switch (80R)
DC switch (50R)
DC switch (50MC)
DC switch (33BU)
DC switch (50MC)
Ref. No. Part Name
Q413 Transistor DC switch (80T)
Q414 Transistor DC switch (80R)
Q415 Transistor DC switch (50R)
Q416 FET DC switch (50IF)
Q420 Transistor RF buffer AMP
Q501 FET DC switch
Q701 FET SQL switch (W/N)
Q702 Transistor Noise AMP
Q703 FET Tone switch
Q704,705 Transistor Limit
Q706 FET Mute (MI1)
Q707 FET Mute (MI2)
Q708 Transistor OPT10 switch
Q709 Transistor AF mute
Q710 Transistor Audio mute switch
Q901,902 Transistor DC switch (AUXO1)
Q903 FET Switch
D1 Surge absorber Surge absorption
D2 Diode Bypass diode
Variable
D3,4 capacitance Frequency control
diode
Variable
D7,8 capacitance Frequency control
diode
Variable
D10~12 capacitance Frequency control
diode
Variable
D14 capacitance TX modulation
diode
D21 Diode 2nd Local switch
D101 Diode T/R switch
D103 Diode Antenna switch
D108,109 Diode TX power detect
D201,202 Diode CF switch (W/N)
D205 Diode T/R switch
D401 Zener diode Over DC supply protection
D403 Diode Reverse current prevention
D404 Surge absorber Surge absorption
D405 Diode Reverse protection
D406 Diode Reverse current prevention (BLVL)
D407 Diode DC/DC converter (50M)
Reverse current prevention
D408 Diode
(OR 33M/SBC_2)
Description