Kenwood TK-7108H BLOCK DIAGRAM
TK-7108H TK-7108H
BLOCK DIAGRAM
MIC
DISPLAY UNIT
X54-334*-
MBL
PSB
PTT(TXD)
ME
MIC
HOOK(RXD)
CM
**
PSB
D5
D6
D7
D8
D9
D10
D11
D12
KRA225S
Q10
KRC102S
Q9
1
MON
PF
1
2
3
4
BUSY
RED
SW
SW
MICBL
KMI1
2
KMI2
KRC102S
KRC102S
KRC102S
KRC102S
KRC102S
KRC102S
KRC102S
KRC102S
Q1
SW
Q5
SW
Q2
SW
Q6
SW
Q3
SW
Q7
SW
Q4
SW
Q8
SW
KEY
P
3
KMI3
M
4
LEDMON
LEDPF
LEDC1
LEDC2
LEDC3
LEDC4
LEDG
LEDR
KMI4
KMO2
KMO1
GND
PTT
HOOK
ME
MIC
POWER
LEDMON
LEDPF
LEDC1
LEDC2
LEDR
LEDG
MICBL
LEDC3
LEDC4
CM
KMI1
KMI2
KMI3
KMI4
KMO1
KMO2
PSB
TX-RX UNIT
X57-638*-
PLLE
DT
CK
LD
5C
**
IC1
MB15A02
PLL IC
5C
TCXO
D/A
CONV
IC3
M62363FP(*/8)
IC21
NJM2100V
MIC/IDC
AGC
Q41
2SC4919
VOLTAGE
IGNITION
16.8MHz
16.8MHz
NJM2904V
SPLATTER
FILTER
DAN222
OVER
DET
Q3
2SC4649(N,P)
RF
8C
TCXOMOD
IC22
AGC
DET
MIC
MUTE
D43
SW
Q38
KRC404RTK
SW
Q16
KRC414RTK
8C
CHARGE
PUMP
CHARGE
PUMP
NJM2902V
(*/4)
D44
1SS372
MICMT
2SC4617(S)
8C
IC4
SUM
B
Q4
2SA1832(GR)
CV
LOOP
FILTER
Q5
2SC4738(GR)
Q14
8CL
LIPPLE
FILTER
D/A
CONV
IC3
M62363FP(*/8)
D/A
CONV
SBC
NARROW
WIDE
PLLE
DT
CK
DTMF
BEEP
PTT
HOOK
POWER
CM
KMI1
KMI2
KMI3
KMI4
LD
INT
RESET
Q10
2SK508NV(K52)
RX
VCO
Q7
2SJ243
SW
TX
VCO
VCOMOD
D18
MA742
SQIN
TCXOMOD
IC4
NJM2902V
(*/4)
BUFF
DTMF
LEDMON
LEDPF
LEDC1
LEDC2
LEDR
LEDG
MICBL
LEDC3
LEDC4
KMO1
KMO2
BSHIFT
MUTE1
MUTE2
MUTE3
8TC
8RC
Q12
KRX102U
SW
TXRX
Q11
2SK508NV(K52)
M62363FP(*/8)
Q18
2SC2412K
DET
NOISE
VCOMOD
D/A
CONV
IC3
M62363FP(*/8)
BSHIFT
2SC5108(Y)
IC3
Q13
2SK1824
SW
Q15
UPB1509GV
BUFF
8CL
16.8MHz
D/A
CONV
D13
DAN222
SW
WIDE
CPU
IC6
784214AGC141
X2
IC23
DIVIDER
5C
TRIPLER
IF
DEMODULATOR
8C
CF1
(WIDE)
450kHz
CF2
(NARROW)
EEPROM
5M
Q20
2SC4649(N,P)
RF
8C
Q6
2SC4617(S)
50.4MHz
2SC4649(N,P)
D15
DAN222
IC7
24LC08BT-ISN
Q37
2SK1824
SW
8R
8T
T/R
SW
D19
DAN235E
Q19
IF
49.95MHz
8R
SW
NARROW
TEMP1
TEMP2
TEMP3
IGNITION
BATT. CHECK
OVER VOLTAGE
DET
7.159MHz
Q23
2SC3357
RF
8T
MCF
XF1
LC73872M
DIVIDER
IC19
TC7W74FU
Q25
2SC3357
PRE
DRIVE
AMP
8T
Q21
3SK255
MIX
8R
D21,22
HVC350B
IC9
DTMF
DECODE
3.579545
MHz
Q800
2SK3075
DRIVE
AMP
BPF
RF BPF
TUNE
NJM2902V
NJM2904V
KTA1664(Y)
2SA1745(6,7)
Vg
Q26
3SK255
IC10
AF
FILTER
QT/DQT
FILTER
IC11
Q33
8T
KRC102S
8TC
Q31
8R
KRC102S
8RC
5C
Q101
2SK3478-22
FINAL
AMP
RF
8R
RF BPF
TUNE
Q24
2SC4617(S)
HPF
SW
Q30
SW
SW
Q29
SW
AVR
5V
D801 MA4PH633
D804 XB15A709
ANT
SW
D805
MA742
Vg
BPF
D25,26
HVC350B
DTMF/BEEP
Q22,43
2SK1824
SW
MUTE1
BATT. CHECK
IC20
KIA7808AF
AVR
8V
SBC
IC14
NJM78L05UA
POW.
DET
M62363FP
(*/8)
CONV
SB
SW
Q34
KRC102S
BUFFER
IC800
CONTROL
8T
M62363FP(*/8)
IC3
D/A
SW
MUTE2
Q42
2SA1641(S,T)
SW
INT
RESET
LPF
D806
MA742
TA75W01FU (1)
TA75W01FU (2)
APC
IC3
D/A
CONV
IC101
LA4600
AF
PA
Q32
DTC363EU
IC17
NJM78L05UA
AVR
5M
IC18
PST9140NR
INT
IC15
PST9140NR
RESET
POW.
DET
PC
5M
ANT
EXT
SP
+B
E
SP
45 46
Receiver Section
TK-7108H TK-7108H
LEVEL DIAGERAM
W –123.5dBm
N –123.0dBm
ANT
BPF
Transmitter Section
Center Frequency
W –119.0dBm
N –118.5dBm
Q26
D
G2
G1
S
W –104.5dBm
N –103.5dBm
BPF
49.95MHz
W –77.5dBm
N –74.0dBm
W –104.5dBm
N –103.5dBm
Q21
D
G2
G1
S
W –112.0dBm
N –111.5dBm
XF1
W –92.0dBm
N –90.5dBm
Q19
20
To make measurements in the RF section, connect the RF level meter.
In the RF section, use a 0.01uF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
450kHz
CF1
/CF2
IC5
Audio Frequency
W –85.0dBm
N –84.5dBm
W/N
0.33Vrms
IC10
11
812
9
W/N
0.32Vrms
W/N
0.26Vrms
W/N
0.30Vrms
IC10 IC10 IC10
14 3 1 5 7
W/N
0.31Vrms
Q24
To make measurements in the AF section, connect the AC level meter.
(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))
The AF output level is adjusted for a 0.45V/4ohm by the front panel AF VOL control.
W/N
10mVrms
IC3
12
W/N
0.50Vrms
W/N
0.45Vrms
IC101
11
10
1
J1
4 ohm
MIC
Display Unit
X54-334
TX-RX Unit
TX-RX Unit (VCO)
W/N
5.0mVrms
W/N
0.10Vrms
IC21
21 67 31 57 21 98 910 21
W/N
1.55Vrms
W/N
1.36Vrms
IC22IC21
W/N
1.47Vrms
IC22 IC4
W/N
0.47Vrms
W 0.25Vrms
N 0.12Vrms
IC4
To make measurements in the AF section, connect the AC level meter.
AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD.
W 1.4mVrms
N 0.5mVrms
IC3
–7dBm
–8dBm
IC23
To make measurements in the RF section,
connect the RF Wattmeter (50 ohm).
–5dBm
Q20Q15Q11
TX-RX Unit FINAL Amp
–7dBm
13dBm
17dBm
D19
Q25Q23
Q800
G
D
S
Q101
G
TX-RX Unit
50W
D
S
D804
ANT
47 48
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