NX-200
18
Control unit (X53-4260-XX)
Ref. No.
Part Name
Description
IC1
IC
LCD contrast
IC101
IC
FLASH ROM
IC102
IC
DSP
IC103
IC
SRAM
IC104
IC
2 input AND gate
IC105
IC
Reset
IC106
IC
RTC
IC107
IC
Buffer
IC108
IC
ASIC
IC109
IC
2 input AND gate
IC401,402
IC
Bus switch
IC403
IC
Voltage doubling inverter
IC404
IC
Voltage regulator (33M)
IC406
IC
Voltage regulator (33A)
IC407
IC
DC/DC converter
IC408
IC
AF AMP
IC409
IC
AF switch
IC411
IC
Voltage regulator (50U)
IC412,413
IC
Audio AMP
IC414
IC
Reset
IC415
IC
2 input AND gate
IC416
IC
Voltage regulator
IC417,418
IC
Dual bus buffer
IC701
IC
I/O control
IC702
IC
APC LPF
IC703
IC
D/A converter
IC704
IC
RX AF LPF
IC705
IC
Modulation LPF
IC706
IC
MIC AMP
IC707
IC
RX AF switch
IC708
IC
Voltage regulator (5A)
IC709
IC
Sidetone mute
IC710
IC
MOD/MIC summing AMP
IC711
IC
SQL BPF/SQL DC AMP
IC712
IC
MIC switch
IC713
IC
1.65V REF/RX summing AMP
IC714
IC
OPT switch
IC715,716
IC
VOX AMP
IC717
IC
DC/DC converter (15M)
Q1,2
Transistor
LCD backlight switch
Q3
FET
LCD backlight switch
Q4
FET
MIC mute control
Q5
FET
MIC mute switch
Q101,102
Transistor
12key backlight switch
Ref. No.
Part Name
Description
Q103
FET
12key backlight switch
Q401,402
FET
Level converter
Q403
Transistor
SB2 switch
Q404
FET
SB2 switch control
Q405
FET
AF AMP switch
Q406,407
Transistor
Voltage regulator (AF AMP)
Q408,409
Transistor
DC switch
Q410
FET
DC switch
Q411
FET
Level converter
Q412
FET
DC switch control
Q413~415
Transistor
DC switch
Q701
Transistor
OPT switch
Q702
FET
Tone switch
Q703
FET
W/N noise switch
Q704
Transistor
SQL noise AMP
Q705,706
Transistor
MIC AGC
Q707
FET
MIC mute
D1,2
LED
12key backlight
D3,4
LED
LCD backlight
D5,6
LED
12key backlight
D7,8
LED
LCD backlight
D9,10
LED
12key backlight
D11
Diode
LCD backlight switch
D12~16
Diode
Reverse current prevention
D17~21
Zener diode
Surge absorption
D22,23
Diode
Surge absorption
D101
Diode
12key backlight switch
D102
Diode
Reverse current prevention
D401~404
Diode
12key control
D405,406
Diode
DC/DC converter
D407
Diode
Over voltage prevention
D408
Diode
DC/DC converter control
D409,410
Diode
SP control
D411
Diode
RTC BATT control
D412
Diode
DC switch control
D413
Diode
RTC BATT control
D414,415
Diode
Reverse current prevention
D416
Diode
33M control
D417
Diode
33A control
D701
Diode
5A switch
D702
Diode
PLD control
D703,704
Diode
Detector
D705
Diode
Noise detector
D706
Diode
VOX detector
D707
Diode
VOX
COMPONENTS DESCRIPTION