Tx-Rx Unit (X57-7370-Xx) Components - Kenwood NX-300 Service Manual

NX-300
TX-RX unit (X57-7370-XX)
Ref. No. Part Name
IC404 IC
IC500 IC
IC501 IC
IC502 IC
IC503 IC
IC504 IC
IC600 IC
IC700 IC
IC701 IC
IC702,703 IC
IC900 IC
IC901 IC
IC902 IC
IC903 IC
Q503 Transistor
Q504 FET
Q507 Transistor
Q508,509 FET
Q510,511 FET
Q512,600 Transistor
Q601 Transistor
Q602 FET
Q603 FET
Q604 Transistor
Q605 FET
Q606 FET
Q607 Transistor
Q608 FET
Q610 Transistor
Q700 Transistor
Q701 Transistor
Q703 FET
Q704 Transistor
18
COMPONENTS DESCRIPTION
Description
OP AMP (RSSI/VAGC)
Temperature sensor
AF AMP for TCXO MOD
PLL IC
DC AMP for VCO tune
OP AMP (VCO MOD/APC)
Auto power control
Buffer
FM IC
DC AMP for BPF
50T control
DC/DC converter
Voltage regulator (50C)
Voltage regulator (33C)
Ripple fi lter
Buffer AMP
Ripple fi lter
VCO oscillation
T/R switch
Buffer AMP
Pre-drive AMP
Drive AMP
Pre-fi nal AMP
APC switch
APC switch
RF fi nal AMP
APC switch
APC switch
APC switch
2nd Local tripler
IF AMP
Mixer
Ripple fi lter
Ref. No. Part Name
Q705 FET
Q706 FET
Q900 Transistor
Q901 FET
Q902 FET
Q903 FET
Q904 FET
Q905 Transistor
D501 Diode
D505 Diode
D506,507, Variable capaci-
D510,511 tance diode
Variable capaci-
D514~517
tance diode
D518 Diode
Variable capaci-
D519
tance diode
D600,601 Diode
D604 Zener diode
D605 Zener diode
D606,607 Diode
D700 Diode
Variable capaci-
D702~704
tance diode
D705 Diode
Variable capaci-
D706,708
tance diode
D709 Diode
Variable capaci-
D710
tance diode
D711 Diode
D900 LED
D901 Diode
D902 Diode
D902 Diode
Description
RF AMP
RF AGC
TX/RX LED switch
SB3 switch
50R switch
50IF switch
DC/DC converter switch
50T switch
Ripple fi lter
Bypass diode
Frequency control
Frequency control
Ripple fi lter
TX modulation
Local switch
APC switch
APC protect
Antenna switch
Ripple fi lter
Vari-cap tune
RF AGC
Vari-cap tune
Antenna switch
Vari-cap tune
Antenna switch
TX/RX LED
Reverse protection
50T control
50T control