Service Manuals, User Guides, Schematic Diagrams or docs for : Kenwood 430MHz FM Transceiver 430MHz FM Transceiver Kenwood TH-K4AT & K4E B51-8660-00-BLSP
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Transmitter Section
AF(1kHz) RF(435.05MHz)
IC16 Q9 Q10 Q11 Q12 ANT FILTER
MIC
MIC AMP vco
ANT
50
9.70Vrms 0.83Vrms -20.00dBm 7.33dBm 5.67dBm 14.17dBm 11.50dBm 26.33dBm 14.00dBm 27.50dBm
All voltage levels must be measured at High power transmission.
The RF and IF sections are measured by using a spectrum analyzer.
After setting the standard (1 kHz, 3 kHz Dev.) deviation, each voltage
of the AF section is measured by using an AF VTVM or osciloscope.
The level for each point is measured without removing parts or cutting
the pattern.
Receiver Section
RF(435.05MHz) IF(38.85MHz) AF(1kHz)
vco
LEVEL DIAGRAM
-4.00dBm
0.58Vrms
ANT FILTER Q17 Q16 IC3 IC6
ANT BPF BPF Q24 SP
FM IC AMP
-53.00dBm -60.50dBm -42.33dBm -41.17dBm -36.33dBm -40.33dBm -21.00dBm 0.28Vrms 8.23mVrms 0.66Vrms
All voltage levels must be measured after setting the AF output volt-
age at 0.58V rms.
The RF and IF sections are measured by using a spectrum analyzer.
Each voltage of the AF section is measured by using an AF VTVM or
osciloscope.
The level for each point is measured without removing parts or cutting
the pattern.
55
TH-K4AT/K4E
TH-K4AT/K4E
BLOCK DIAGRAM
VR6
TONE
DTMF/BEEP
VR5
IC5 IC16 D6
NJM2107F NJM2904V 1SV278
MOD
HPF LIMITTER AMP
SPLATTER Q1
FILTER 2SK508NV
(52K)
5C OSC
5T
D1 2 3 4
, , ,
HVC376B
5MV Q6
Q30 Q27
Q29,D22,D27 2SC4617(R) 2SK1830 2SC5488
D74 D79
, 2SC4919
DA221 1SS361 VOX AMP RF AMP
WIDE/NARR
RB706F-40
LIMITTER SW
MIC AGC
J3 Q3
PTTE/RXD D24 2SK1830
MA742
5MV NAR SHIFT SW
MICM
VOX DET
LPF LOOP
FILTER
SHIFT
D42,43,46 IC1
D44,47 LMX2316TMX 2nd Local
B30-2205-05
KEY ILLMI PLL IC TCXO 5MS Q23
KTC4082
X1
KIN0~3 12.8MHz
Q50 TRIPLER
2SK1830 VR1
KEY ILLMI 5C
SW
PLLEN
PLLLD
KYO0~3 CLOCK
DATA 5R
VR6
X57-675 B/3
VOXIN TONE NAR
SIGIN
VSS,DVSS,
AVSS,AVRL Q52
PTT RN1107
PTTI BSFT
KIN4 D48,49 Q51 BEAT SHIFT
B30-2205-05 RN4902 IC8
LAMP
LCD ILLMI LCD ILLMI
LAMP SW MPU
KYO1 X0
KYO2
X1
MONI
SEG0~31
X57-675 C/3 COM0~3
BTEMP
DCDET
CLOCK
DATA VCC,DVCC
EEPCS INTUP AVCC,AVRH
LCD EEPDI INTDW RESET HST(VCC),V3
D/A H/L
DTMF/BEEP,TONE AFM,SPM,MICM, IC15 IC10 IC11 D40,41
KAPC,FINAL,CHARGE, AT25160N S-80844 S-80930 B30-2156-05
AFAMP,RXLED,BTDET,TXD 10SI27 CNNBB85 CNNBG80 B30-2157-05
PWM 5MS,5R,5T,5C(SAVE),VOX, 5C
EEPROM INT RESET
BPF/APC KYO0~3,VUKEY TX/RX LED
A/D H/L
REM,SQ,SM,BATT 5M
RXD,PTTE,PTTI,
ENCA,ENCB, Q47
PWRSW,KIN0~4,TYPE RN1701 5T
TX/BUSY
LED SW RXLED
X57-675 A/3
56
TH-K4AT/K4E
BLOCK DIAGRAM
B
LPF
Q2 Q5 D8, D9 Q9 Q10 Q11 Q12 D10,11
2SC5488 2SC5488 HSC277 2SC5488 2SC4926YD 2SK2596 2SK3476 ANT
HVC131
RF AMP RF AMP TX/RX SW RF AMP PRE-DRIVE DRIVE AMP FINAL AMP ANT SW
AMP
5R 5T
5C
Q14 D12,D13
Q4,D7 Q15 RN4902 HVC131
TH1 Q58
2SC4617(R) 2SK1830 ANT SW
B57331V APC SW
LIPPLE 2103J APC KILL SW
FILTER SW BIAS SW
TEMP DET
FINAL
Q13 IC2 D17
CF1 450kHz 2SK1830 NJM2904V HSM88AS
5C D14
5T
SW APC AMP RB521S-30 ANT SW
5R
APC V BPF/APC
Q16
XF1 3SK318
MCF MIXER
38.4MHz IC3
TA31136FN Q24 D18,D19 Q17 D20,D21
2SC5488 1SV305 3SK318 1SV305
FM IC IF AMP BPF RF AMP BPF
38.85MHz
5R
5R 5R BPF/APC 5R BPF/APC
SQ,SM
Q22 Q21 Q20 VR Q56 J4
CD1 LPF IC6
RN2105 2SC4617 2SK1830 TA7368F CPH3417
(R) D26
WIDE/NARR DE-EMPH AF FILTER AF MUTE SW AF AMP 1SS388
SW SP MUTE SW
REM
/TXD
DTMF/BEEP
IC17
NJM2904V
CT/DCS 5R AFM AF AVR Q31 CN2
FILTER 2SK1830
SPM D25
MA2S111
MUTE SW
5R
Q36
2SJ347
-
THERM DET
T
Q41
RN2105
VR1
ENC 5MS 5MS SW BTDET
+ BATT TERMINAL
7.5V Norminal
D35 (6.0 - 9.0V)
RB521S-30
PROTECT
Q57 IC9 Q35
IC1 RN2105 Q33 D30 D33
TCXO 5M TK11250
CM 2SK1830 2SB1184 RB521S-30 RB051L-40
Q4,5,6 5C SW (Q,R)
D40,41 5C AVR DC-IN DET BATT PROTECT PROTECT
5.0V CHARGE
B
IC5 Q53 IC12 Q37, Q38
Q30 Q34 D32
5MV RN2701 TK11250 IC6 2SB1184(Q,R) 2SK1830 RB051L-40
CUCB D48,49 2SC4617(R) CHARGE
IC3,17 5R SW D42,43,46 B
D9,14 5MV SW AVR D47,44 AF/LAMP CHARGE SW PROTECT
Q16,17 5.0V AVR
5R
Q22,23,24
AF AMP
DC IN
13.8V Norminal
Q55 D36 IC4 (12.0 - 16.0V)
Q9,10,13 CPH3317 XC6202PB D81
RB521S-30 RB521S-30 J2
D8,10 52FR
TH1 5T 5T SW B
IC16 PROTECT AVR PROTECT
Q47 11.5V
57
TH-K4AT/K4E
BC-21 (WALL CHARGER) / PB-43N (Ni-MH BATTERY PACK)
BC-21 External View PB-43N External View
Photo is K type.
BC-21 Specifications
Rated output voltage ......... DC 13.8V ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo