Display Unit; Tx-Rx Unit; Components Description - Kenwood NX-720 Service Manual

Display unit (X54-3830-10)
Ref. No. Part Name
IC1 IC
Q3 Transistor
Q6 Transistor
Q8 Transistor
Q9 Transistor
Q10 Transistor
Q11 Transistor
D2 Diode
D5-9 LED
D11-21 LED
D22 LED
D23 LED
D24 LED
D25 Varistor
D26 Diode
D27 Zener diode

COMPONENTS DESCRIPTION

Description
LCD driver
TX/Busy LED switch
TX/Busy LED switch
LCD backlight switch
Backlight switch
Status LED switch
Backlight switch
Line protection
Key backlight
LCD backlight
Status LED
TX/Busy LED
LCD backlight
Line protection
Key control
Over DC supply protection
NX-720(G)/720
TX-RX unit (X57-8230-1X)
Ref. No. Part Name
IC1 IC
IC2 IC
IC3 IC
IC102 IC
IC103 IC
IC201 IC
IC301 IC
IC303 IC
IC304 IC
IC401 IC
IC402 IC
IC404 IC
IC405 IC
IC406 IC
IC407 IC
IC408 IC
IC409 IC
IC501 IC
IC502 IC
IC503 IC
IC504 IC
IC506 IC
IC507 IC
IC508 IC
IC509 IC
IC511 IC
IC512 IC
IC513 IC
IC514 IC
IC515 IC
IC516 IC
IC701 IC
IC702 IC
IC703 IC
IC705 IC
IC711 IC
IC712 IC
IC713 IC
IC714 IC
IC716 IC
IC801 IC
Description
AVR (80C)
PLL system
DC AMP (CV/Assist)
TX power module
OP AMP (APC)
DC AMP (BPF)
AND gate
FM system
DC AMP (RSSI)
AVR (33M)
Voltage detector (BINT)
AVR (50C)
DC/DC converter (50M)
AVR (33A)
AVR (33GPS)
AVR (15M)
AVR (33C)
Flash memory
DSP
SRAM
Reset
Buffer AMP (Clock)
ASIC
AND gate
Dual BUS buffer (HOOK/RXD/MKEYI)
BUS buffer
Level shift
Dual BUS buffer (FNC3/FNC1)
Dual BUS buffer (FNC2/FNC4)
I/O expander
RS-232C driver
VCO MOD/VREF
LPF (APC/DMO)
MIC SUM AMP/LPF (DI)
BPF/Buffer AMP (SQ)
RX SUM AMP/LPF (RX AF)
D/A converter
MIC/RX selector
AF power AMP
Dual BUS buffer (TXD1/MKEO)
Dual BUS buffer (TXD2/RXD2)
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