Service Manuals, User Guides, Schematic Diagrams or docs for : Kenwood VHF FM Transceiver VHF FM Transceiver Kenwood TM-271A & 271E B51-8663-00-BLSP
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TM-271A/271E
BLOCK DIAGRAM
DISPLAY UNIT (X54-3450-10) TX-RX UNIT (X57-685X-XX)
Q404
MIC 2SC4649(N,P)
RF
VOL 8C Q
MIC KEY VR1
8C R31-0649-05 2SK50
VIARIABLE RESISTOR Q402
PTT(TXD) POWER IC401 8C CHARGE 2SA1832(GR)
ME MB15A02 PUMP V
MIC PLLE
HOOK(RXD) DT LOOP CV Q407
CM(MIC KEY2) CK PLL IC
FILTER 2SJ347
LD
16.8MHz CHARGE Q403
MR VFO CALL
5C 16.8MHz PUMP 2SC4738(GR)
5C TCXO TCXOMOD
S1 ENCA
W02-3665-05 MHz REV Func X401 Q440
V
ENCODER 2SC2412K
ENCB
D/A LIPPLE 8CL VCO
KI3 KI2 KI1 8C
CONV FILTER
IC161
KI1 KS1 KS2 M62363FP(8/8)
KI2 KS1 M
KI3 KS2
SQIN
IC3 CE
COM0~3 LCD DRIVER CL
LCD
SEG0~31 LC75854W/ DI T
LC75854W/ DO
IC203 IC161 IC203
ENCB IC201 IC202
Q1 BA10324AFV M62363FP BA10324
CM 2SK1824 NJM2100V BA10358FV (1/4) (3/8) (3/4)
MBL ENCA
MIC KEY MIC SPLATTER D/A
MIC/IDC SUM BUF
DI MUTE FILTER CONV
CE
CL
DO MICMT PKD1200 DTMF
5C QT/DQT
AGC
8C AGC PKD9600
DET
VOL
POWER Q201 D201
RXD 2SC4919 DAN222
D19~30 BRI D202
Q9 B30-2205-05 PTT(TXD) IC161 1SS372
2SB1132(Q,R) LCD BACK LIGHT GND M62363FP
Q12 (4/8) QT/D
ME DTM
UMG3N MIC
D/A
SB SW CONV
SBC
8TC
IC204 8RC
BU4S66
AFM
SW PKD1200 SPM
BRI AMP
MIC
P1M
Q10 D2~4 P9M
KRA225S B30-2205-05 P1MT
KEY BACK LIGHT IC205 BSH
BU4S66 TX/R
SW
NAR
SW PKD9600 WID
PLLE
ELV
SW MBL CK
P9MT DT
SQC
PKD
PKS
PR9
PR1
Q6
KRC102S
38
TM-271A/271E
BLOCK DIAGRAM
D602
Q411 MA4PH633
Q405 Q410 IC402 2SC4649 8T 8R Q501 Q502 Q503 Q504 D603,605
2SK508NV(K52) 2SC5108(Y) UPB1509GV (N,P) 2SC3357 2SC3357 PD55003 RD70HVF1 XB15A709
PRE
R) RX T/R DRIVE FINAL
BUFF DIVIDER RF RF DRIVE ANT SW LPF ANT
VCO SW AMP AMP
AMP
CV Q407 Q408 D409 Vg
2SJ347 KRX102U 8CL 5C 8C DAN235E 8T
8T
D606 POW. D607 POW.
SW SW Q302 MA742 DET MA742 DET
R) 2SC2412K
TXRX
16.8MHz TRIPLER
TX
VCO Q406 IC161 Vg
IC501
2SK508NV(K52) M62363FP 50.4MHz
IC301 BUFFER TA75W01FU
CL (1/8)
VCOMOD (1/2)
D/A IF Q351 Q352 Q353
CONV DEMODULATOR 2SC5108(Y) 3SK318 3SK318 IC501
D301 Q301 TA75W01FU
MA742 2SC2412K IF MCF MIX BPF RF BPF (2/2)
APC
8C CONTROL PC
SQIN DET NOISE X351 8T
8R 49.95MHz 8R 8R
D351,352 RF BPF RF BPF D353,354 IC161
TCXOMOD VCOMOD
D303 CF301 D302 HVC376B TUNE TUNE HVC376B M62363FP(2/8)
IC203 IC161 DAN222 (WIDE) DAN222
3FP BA10324AFV M62363FP D/A
8T SW
(3/4) (7/8) SW CONV SP
SW 450kHz Q354
D/A 2SK1830 DTMF/BEEP
BUFF CF302 IC161
V CONV (NARROW) IC251 Q251 Q252,253 M62363FP Q254 IC252
BA10324AFV 2SC2412K 2SK3019 (5/8)(6/8) DTC363EU LA4600
NARROW
WIDE AF D/A AF
FILTER HPF SW CONV SW
PA
PTT CL CM 5M
RXD CE POWER IC66
DI ENCA PKS EXT.
MICKEY DO ENCB EEPROM AT24C64A10SI18 or AFM SP
SQC CAT24WC64J1 SW
MICKEY2 VOL SPM
EEPWP Q255
EEPCK KRC102S
EESDT
8C AMPSW
QT/DQT
DTMF TEMP1 Q35 IC31 Q31
TEMP2 KTA1664(Y) KIA7808AF 2SA1641(S,T)
SBC AVR +B
8T SW SW
8TC 8V
8RC RSSI IC33 E
SQIN Q36 NJM78L05UA
CPU SB
AFM KRC102S
SPM IC101
30622MAA-B85GP 8TC SW SBC SW 5M AVR
AMPSW
MICMT
P1MT RESET Q33 Q32 IC35
P9MT INT 2SA1745(6,7) KRC102S BD4740G
8R SW OVER
BSHIFT INT
TX/RX SIGNAL VOLTAGE INT
Q34 DETECT
NARROW KRC102S
WIDE
8RC SW Q61
PLLE SW B
KRC404RTK
ELVLLD Q86 X86 Q87 IC34
CK 2SK1830 2SK1830 BD4732G
DT
8M AVR
BSHIFT SW SW 5C RESET RESET 5M
5V IC32
NJM78L05UA
39
TM-271A/271E
LEVEL DIAGRAM
Receiver Section
Center Frequency 49.95MHz 450kHz
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