Kenwood NX-720 Service Manual page 18

NX-720(G)/720
Ref. No. Part Name
Q1 Transistor
Q2 FET
Q4 Transistor
Q5 Transistor
Q6 FET
Q7 FET
Q8,9 FET
Q10,11 Transistor
Q102 Transistor
Q105 FET
Q106 Transistor
Q201 FET
Q202 Transistor
Q303 Transistor
Q305 Transistor
Q401 Transistor
Q402 Transistor
Q403 FET
Q404 Transistor
Q405 Transistor
Q407 Transistor
Q408 Transistor
Q409 FET
Q410 Transistor
Q411 Transistor
Q412 Transistor
Q414 Transistor
Q415,416 Transistor
Q417 Transistor
Q418 FET
Q501 FET
Q502 Transistor
Q503 FET
Q504 Transistor
Q701 FET
Q702 Transistor
Q703,704 Transistor
Q705 FET
Q706 FET
Q708 Transistor
Q709 FET
D2 Zener diode
18
COMPONENTS DESCRIPTION
Description
DC switch (Assist)
DC switch (Assist)
Ripple fi lter
Buffer AMP (PLL fi n)
RX VCO
TX VCO
T/R VCO switch
Buffer AMP
TX drive AMP
DC switch (H/L power)
DC switch (50C)
RX 1st mixer
LNA
Tripler
1st IF AMP
DC switch (Over DC supply pro-
tection)
DC switch (80ANT)
DC switch (SB)
DC switch (80T)
DC switch (80ANT)
DC switch (50MC)
DC switch (50CS)
DC switch (33A_2)
DC switch (50MC)
DC switch (80T)
DC switch (80ANT)
DC switch (150C)
DC/DC converter
DC switch (50R)
DC switch (SB)
DC switch (System)
DC switch (Horn alert)
DC switch (Horn alert)
DC switch (IGN)
SQL noise BW switch
Noise AMP
MIC AGC
Mute (MI1)
Mute (MI2)
Pop noise prevention switch
AF mute switch
Over voltage protection
Ref. No. Part Name
Variable capaci-
D4
tance diode
Variable capaci-
D5
tance diode
Variable capaci-
D6
tance diode
Variable capaci-
D7
tance diode
Variable capaci-
D8
tance diode
Variable capaci-
D9,10
tance diode
Variable capaci-
D11
tance diode
Variable capaci-
D13
tance diode
D14 Diode
Variable capaci-
D15
tance diode
D16,17 Diode
D101 Zener diode
D102 Diode
D103 Diode
D104,105 Diode
D106 Diode
D107 Diode
D108,109 Diode
D110,110 Diode
D112-114 Diode
Variable capaci-
D202-207
tance diode
D401 Zener diode
D403,404 Diode
D405 Diode
D406 Diode
D407 Diode
D408,409 Diode
D410 Surge absorption Surge protection
D411 Diode
D502 Diode
D504 Diode
D505-510 Diode
D511-513 Diode
D601 Diode
D701 Diode
D702 Diode
D703,704 Diode
D705,706 Diode
D801,802 Diode
Description
RX VCO frequency control
TX VCO frequency control
PLL f-in BPF tune
RX VCO assist tune
TX VCO assist tune
RX VCO assist tune
TX VCO assist tune
PLL f-in BPF tune
Speed up
FM modulation
T/R switch
Over voltage protection
Transient voltage limiter
Reverse current prevention
TX power detection
Voltage limiter
Antenna switch
Over DC supply protection
Antenna switch
Over DC supply protection
RX BPF tune
Over DC supply protection
Reverse current prevention
Discharge
DC/DC converter
DC/DC converter (50M)
DC/DC converter
Reverse current prevention
Reverse current prevention
Reverse current prevention
Line protection
Reverse current prevention
Line protection
Reverse current prevention
Noise detector
AF detector
Line protection
Over DC supply protection