KENWOOD TK3131 Service Manual

Cover page of KENWOOD TK3131 Service Manual

Service Manual for KENWOOD TK3131, downloadable as a PDF file.

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© 2001-11 PRINTED IN JAPAN
B51-8612-00 (N) 73
UHF FM TRANSCEIVER
TK-3130/3131
SERVICE MANUAL
30K : TK-3130 (K type)
31K : TK-3131 (K type)
A
: TK-3131 (A type)
GENERAL .................................................. 2
REALIGNMENT ......................................... 3
CIRCUIT DESCRIPTION ............................ 5
SEMICONDUCTOR DATA ........................ 9
DESCRIPTION OF COMPONENTS ........ 10
PARTS LIST ............................................. 11
EXPLODED VIEW .................................... 17
PACKING ................................................. 18
ADJUSTMENT ........................................ 20
PC BOARD VIEWS
TX-RX UNIT (X57-6460-XX) (B/2) ...... 24
TX-RX UNIT (X57-6460-XX) (A/2) ...... 27
SCHEMATIC DIAGRAM .......................... 33
BLOCK DIAGRAM ................................... 37
LEVEL DIAGRAM .................................... 39
TERMINAL FUNCTION ........................... 40
KNB-27N (Ni-MH BATTERY PACK) ........ 40
SPECIFICATIONS .................................... 41
CONTENTS
Antenna
(T90-1004-05)
Knob (VOL)
(K29-9138-03)
Cap (P-jack)
(B09-0627-03)
Cabinet assy (Front)
(A02-3663-03) : 30K
(A02-3705-03) : 31K
(A02-3706-03) : A
Button knob (PTT)
(K29-9137-13)
Key top
(K29-9136-12)
Photo is TK-3130.
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© 2001-11 PRINTED IN JAPAN
B51-8612-00 (N) 73
UHF FM TRANSCEIVER
TK-3130/3131
SERVICE MANUAL
30K : TK-3130 (K type)
31K : TK-3131 (K type)
A
: TK-3131 (A type)
GENERAL .................................................. 2
REALIGNMENT ......................................... 3
CIRCUIT DESCRIPTION ............................ 5
SEMICONDUCTOR DATA ........................ 9
DESCRIPTION OF COMPONENTS ........ 10
PARTS LIST ............................................. 11
EXPLODED VIEW .................................... 17
PACKING ................................................. 18
ADJUSTMENT ........................................ 20
PC BOARD VIEWS
TX-RX UNIT (X57-6460-XX) (B/2) ...... 24
TX-RX UNIT (X57-6460-XX) (A/2) ...... 27
SCHEMATIC DIAGRAM .......................... 33
BLOCK DIAGRAM ................................... 37
LEVEL DIAGRAM .................................... 39
TERMINAL FUNCTION ........................... 40
KNB-27N (Ni-MH BATTERY PACK) ........ 40
SPECIFICATIONS .................................... 41
CONTENTS
Antenna
(T90-1004-05)
Knob (VOL)
(K29-9138-03)
Cap (P-jack)
(B09-0627-03)
Cabinet assy (Front)
(A02-3663-03) : 30K
(A02-3705-03) : 31K
(A02-3706-03) : A
Button knob (PTT)
(K29-9137-13)
Key top
(K29-9136-12)
Photo is TK-3130.
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2
TK-3130/3131
GENERAL
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service in-
formation for the equipment and is current as of this publica-
tion date. Changes which may occur after publication are
covered by either Service Bulletins or Manual Revisions,
which are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, and chassis. If
the part number is not known, include the chassis or kit
number of which it is a part and a sufficient description of
the required component, for proper identification.
PERSONNEL SAFETY
The following precautions are recommended for person-
nel safety :
· DO NOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
· SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.
· This equipment should be serviced by only qualified tech-
nicians.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained within.
TK-3130
Destination
Number of CH
Frequency No. / Frequency / Color
Factory default CH setting
RF power output
K
2 channel
1
464.5000MHz
Brown
CH1 : 464.5500MHz / QT OFF
1W / 500mW
2
464.5500MHz
Yellow
Color : Yellow
3
467.7625MHz
J
CH2 : 467.9250MHz / QT OFF
4
467.8125MHz
K
Color : Blue Star
5
467.8500MHz
Silver Star
6
467.8750MHz
Gold Star
7
467.9000MHz
Red Star
8
467.9250MHz
Blue Star
All channels are Narrow band width. User can select channel frequency from above.
TK-3131
Destination
Number of CH
Frequency No. / Frequency / Color
RF power output
Bank A
Bank B
RX/TX
RX
TX
K
15 channel
CH1 : 462.5625MHz
CH1 : 462.5625MHz
462.5625MHz
1W / 500mW
CH2 : 462.5875MHz
CH2 : 462.5875MHz
462.5875MHz
CH3 : 462.6125MHz
CH3 : 462.6125MHz
462.6125MHz
CH4 : 462.6375MHz
CH4 : 462.6375MHz
462.6375MHz
CH5 : 462.6625MHz
CH5 : 462.6625MHz
462.6625MHz
CH6 : 462.6875MHz
CH6 : 462.6875MHz
462.6875MHz
CH7 : 462.7125MHz
CH7 : 462.7125MHz
462.7125MHz
CH8 : 462.5750MHz
White
CH8 : 462.5750MHz
467.5750MHz
White
CH9 : 462.6250MHz
Black
CH9 : 462.6250MHz
467.6250MHz
Black
CH10 : 462.6750MHz
Orange
CH10 : 462.6750MHz
467.6750MHz
Orange
CH11 : 462.5500MHz
CH11 : 462.5500MHz
467.5500MHz
CH12 : 462.6000MHz
CH12 : 462.6000MHz
467.6000MHz
CH13 : 462.6500MHz
CH13 : 462.6500MHz
467.6500MHz
CH14 : 462.7000MHz
CH14 : 462.7000MHz
467.7000MHz
CH15 : 462.7250MHz
CH15 : 462.7250MHz
467.7250MHz
All channels are Wide band width. Factory default setting is Bank A.
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3
TK-3130/3131
TK-3131
Destination
Number of CH
Frequency No. / Frequency / Color
RF power output
A
14 channel
CH1 : 467.5125MHz
1W / 500mW
CH2 : 467.5250MHz
CH3 : 467.5375MHz
CH4 : 467.5500MHz
CH5 : 467.5625MHz
CH6 : 467.5750MHz
CH7 : 467.5875MHz
CH8 : 467.6000MHz
CH9 : 467.6125MHz
CH10 : 467.6250MHz
CH11 : 467.6375MHz
CH12 : 467.6500MHz
CH13 : 467.6625MHz
CH14 : 467.6750MHz
All channels are Narrow band width.
GENERAL / REALIGNMENT
REALIGNMENT
1. Getting Acquainted
q PTT (Push to Talk) switch
Press and hold, then speak into the microphone to trans-
mit.
w MENU key
Press to perform various functions. Press and hold while
switching the power ON to enter Setting Mode.
e CAL key
Press before making a call, to alert the other party mem-
bers.
r
/
keys
Press to change the operating channel, to select a menu
in Setting Mode, and to perform other functions.
t Power switch/Volume control
Turn clockwise to switch the power ON and counter-
clockwise to switch the power OFF. Rotate to adjust the
volume.
y MON key
Press to monitor the current channel for activity.
u LED indicator
Indicates the transceiver status.
i SP/MIC jacks
Lift the covers and insert the accessory's plugs here.
1
2
3
4
5
6
8
Antenna
Microphone
Speaker
7
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4
TK-3130/3131
REALIGNMENT
2. PC Mode
2-1. Preface
The transceiver is programmed by using a personal com-
puter, programming interface (KPG-22) and programming
software (KPG-75D).
The programming software can be used with an IBM PC
or compatible. Figure 1 shows the setup of an IBM PC for
programming.
2-2. Connection Procedure
1. Connect the TK-3130/3131 to the personal computer
with the interface cable.
2. When data transmitting from transceiver the red LED
goes on. When data receiving to transceiver the green
LED goes on.
Notes :
· The data stored in the personal computer must match
Model Name when it is written into EEPROM.
· Do not press the [PTT] key during data transmission or
reception.
2-3. KPG-22 Description
(PC programming interface cable : Option)
The KPG-22 is required to interface the TK-3130/3131 to
the computer. It has a circuit in its D-subconnector (25-pin)
case that converts the RS-232C logic level to the TTL level.
The KPG-22 connects the side panel jacks of the TK-3130/
3131 to the computers RS-232C serial port.
2-4. Programming Software Description
The KPG-75D Programming Disk is supplied in 3-1/2" disk
format. The Software on this disk allows a user to program
TK-3130/3131 radios via Programming interface cable (KPG-
22).
KPG-22
IBM-PC
KPG-75D
2-5. Programming with IBM PC
If data is transferred to the transceiver from an IBM PC
with the KPG-75D, the data for each set can be modified.
Data can be programmed into the EEPROM in RS-232C
format via the SP/MIC jack.
In this mode the PTT line operate as TXD and RXD data
lines respectively.
Fig.1
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5
TK-3130/3131
Frequency Configuration
Fig. 1
Frequency configuration
ANT
SW
BPF
MIX, IF
DET
AF
AMP
TCXO
RF
AMP
RF
AMP
MIC
AMP
PLL VCO
1st MIX
CF
450kHz
38.85MHz
MCF
38.4MHz
SP
MIC
ANT
460~470MHz
460~470MHz
421.15~
431.15MHz
RF
AMP
Tripler
X3
12.8MHz
Reception method
Double super heterodyne
1st IF frequency
38.85MHz
2nd IF frequency
450kHz
Transmission method
VCO direct oscillation amplification
Modulation
Variable reactance phase modulation
Table 1
Basic configuration
Receiver System
s Front End
The high-frequency signal from the antenna passes
through a low-pass filter and a high-frequency switch (D12,
L25 and D13) which switches between transmission and re-
ception, and goes to the BPF (L42) to remove unwanted sig-
nals. The resulting signal is amplified by high-frequency am-
plifier (Q18) and goes to the first mixer (Q19).
s First Mixer
The signal that reaches Q19 is mixed with the first local
signal from the VCO to produce a first IF signal (38.85MHz).
(Receive frequency ­ First local frequency
= First IF frequency = 38.85MHz)
The first IF signal passes through MCF: XF1 (monolithic
crystal filter) to remove unwanted signals.
The first IF signal is amplified by IF amplifier (Q20) and
goes to IF IC (IC2).
CIRCUIT DESCRIPTION
Item
Rating
Nominal center frequency (fo)
38.85MHz
Pass bandwidth
±5.0kHz or more at 3dB
Attenuation bandwidth
±18.5kHz or less at 35dB
Ripple
1.0dB or less
Insertion loss
4.0dB or less
Guaranteed attenuation
70dB or more at fo­900kHz
Terminating impedance
610
±10% / 3.0pF±0.5pF
Table 2
MCF (L71-0586-05) : TX-RX unit (B/2) XF1
Item
Rating
Nominal center frequency (fo)
450kHz
6dB bandwidth
±6.0kHz or more
50dB bandwidth
±12.5kHz or less
Ripple (at 450kHz
±4kHz)
2dB or less
Guaranteed attenuation
35dB or more
(at 450kHz
±100kHz)
Insertion loss
6dB or less
I/O matching impedance
2.0k
Table 3 Ceramic filter (L72-0958-05) : TX-RX unit (B/2) CF1
Fig. 2
Receiver section configuration
Fig. 3
Receiver circuit
ANT
LPF
3T
3R
D12
L25
D13
L42
BPF
Q18
3R
IF IC
Q20
XF1
3R
1st IF : 38.85MHz
Q19
VCO
1st local
OSC
BPF
L42
RF AMP
Q18
1st MIXER
Q19
MCF
XF1
IF AMP
Q20
IF AMP, DET
IC2
AF AMP
IC208
SP
1st local OSC (PLL)
2nd local OSC
ANT
38.85MHz
465.0MHz
D12
D13
L25
LPF
ANT
SW

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