Kenwood NX-900 Service Manual page 93
800mhz digital transceiver
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Also See for NX-900:
- Instruction manual (39 pages) ,
- Instruction manual (116 pages) ,
- Function reference (608 pages)
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AT
TX-RX UNIT (X57-8060-10) (A/2)
R : 13.60V
T : 13.52V
L401
L402
CN401
L403
CN402
D404
D412
REVERSE
PREVENTION,
VOLTAGE
DC/DC
REGULATOR (33M)
4.93V
5.00V
13.60V
IC401
XC6118C23CMR
4
3
VSEN
VIN
2
VSS
3.63V
5
1
CD
VoUT
VOLTAGE
DETECTOR (BINT)
/BINT
OVER DC
SUPPLY
PROTECTION
Q401
RT1N141U-T111
SWITCH
(OVER DC SUPPLY
PROTECTION)
DC SWITCH
(IGN)
Q403
RT1N140U-T111
CN403
R401
1
IGN
2
1M
GND
1 2
9
MI1
ME
AU
SCHEMATIC DIAGRAM
D405
SURGE
REVERSE
ABSORPTION
PROTECTION
33A
IC408
3.31V
33M
5.02V
XC6204B332M-G
1
5
VIN
VOUT
2
VSS
3
4
CE
NC
VOLTAGE
REGULATOR (33A)
SBC_2
3.31V
3.30V
C415
100p
13.59V
Q404
2SJ645
DC SWITCH
(SB)
8.02V
REVERSE
CURRENT
PREVENTION
D403
1.73V
1SS416
Q402
RT1N141U-T111
DC SWITCH
(SB)
3.29V
R408
10k
1
1
AV
IC405
LT1616ES6-PBF
R : 13.59V
T : 13.49V
4
3
SHDN
FB
L404
5
2
VIN
GND
6
1
SW
BooST
IC405,D407,409
DC/DC
CONVERTER (50M)
3.34V
Q416
3.32V
SSM6L05FU-F
D408
MC2848-T111
DC SWITCH (50IF)
1.92V
REVERSE
CURRENT
PREVENTION
(OR 33M/SBC_2)
1.56V
3.31V
3.31V
Q405
2SA1955A-F
Q406,411
DC SWITCH
DC SWITCH
(SCTAM1)
(33BU)
Q406
SSM6N17FU
VOLTAGE
REGULATOR (80C)
IC403
NJM78M08FA-ZB
13.58V
7.92V
1
3
IN
oUT
GND
2
D406
REVERSE
CURRENT
PREVENTION
(BLVL)
VOLTAGE
REGULATOR (50C)
IC404
7.92V
5.02V
TA7805F-NQ
50C
1
2
IN
oUT
GND
3
1
2
9
AW
NX-900
50M
5.02V
D409
1SS388F
L405
22u
Q412
3.78V
1.50V
2SA1955A-F
DC SWITCH
(50MC)
43mV
Q410
SSM3K15TE(F)
DC SWITCH
(50MC)
VOLTAGE
REGULATOR (15M)
Q411
3.31V
2SA1955A-F
D410,411
REVERSE
2.87V
PREVENTION,
R422
DC/DC
D410
10k
1SS388F
BATT CHK
80C
R : 6mV
T : 7.86V
Q407
80T
12A02CH
R423
DC SWITCH (80T)
R : 6mV
4.7k
T : 3.28V
Q413
Q408
80R
RT1N141U-T111
12A02CH
R : 7.91V
R424
DC SWITCH (80R)
T : 0V
4.7k
C482
Q414
100p
R : 3.25V
RT1N141U-T111
T : 1mV
R : 5.00V
Q409
T : 0V
12A02CH
R425
C483
DC SWITCH (50R)
4.7k
100p
Q415
RT1N141U-T111
IC406
5.01V
3.28V
TK71733S
33C
1
5
VIN
VoUT
2
GND
3
4
oN/oFF
NP/VREF
4.73V
VOLTAGE
REGULATOR (33C)
IC407
5.01V
3.30V
XC6204B332M-G
33GPS
1
5
VIN
VOUT
2
VSS
3
4
CE
NC
VOLTAGE
REGULATOR (33GPS)
X57-806 (A/2) 10/14
AX
+B
50M
33A
33A_2
50MC
15M
15M
33M
SCTAM1
33BU
/BINT
/RST
SB
1
80C
80T
TXC
80R
50C
50R
1
RXC
1
33C
33GPS
2
2 9
9
MI1
ME
93
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