Kenwood-TKR-850-Service-Manual.pdf

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UHF FM REPEATER
TKR-850
SERVICE MANUAL
REVISED
This Service Manual was revised based on the service
manual as per parts No. B51-8557-00, in order to include
new variants with the following destination codes : K3.
Knob (DC source)
(K29-9106-04)
Panel (Outer)
(A62-0840-03)
Knob (VOL)
(K29-5389-03)
© 2001-5 PRINTED IN JAPAN
B51-8557-10 (N) 1233
Panel assy
(A62-0934-03)
Key top
(K29-5460-02)
Modular jack
(E08-0877-05)
CONTENTS
GENERAL .................................................. 2
SYSTEM SET-UP ...................................... 2
OPERATING FEATURES .......................... 3
REALIGNMENT ....................................... 11
INSTALLATION ....................................... 13
MODIFICATION ....................................... 15
DISASSEMBLY FOR REPAIR ................. 17
CIRCUIT DESCRIPTION .......................... 18
SEMICONDUCTOR DATA ...................... 24
DESCRIPTION OF COMPONENTS ........ 26
PARTS LIST ............................................. 28
EXPLODED VIEW .................................... 39
PACKING ................................................. 41
ADJUSTMENT ........................................ 42
TERMINAL FUNCTION ...........................
WIRING....................................................
PC BOARD VIEWS
RX PLL/VCO (X58-4800-XX) ..............
TX PLL/VCO (X58-4810-XX) ...............
DISPLAY UNIT (X54-3330-20) ............
FINAL UNIT (X45-3630-XX) ................
TX-RX UNIT (X57-6270-XX) (A/2) ......
TX-RX UNIT (X57-6270-XX) (B/2) ......
SCHEMATIC DIAGRAM..........................
BLOCK DIAGRAM ...................................
KES-4 (EXTERNAL SPEAKER) ...............
SPECIFICATIONS ....................................
49
53
55
56
57
61
67
73
79
91
94
95
TKR-850
GENERAL / SYSTEM SET-UP
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.
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.
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.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained in this manual.
SYSTEM SET-UP
Merchandise
received
Choose the type
of transceiver
Frequency range (MHz)
TX/RX 450~480
TX/RX 480~512
TX/RX 400~430
TX/RX 440~470
RF power
40W
40W
40W
40W
Type
K
K2
K3
E
See page 11.
Repeater
A personal computer (IBM PC or compatible), programming interface (KPG-46),
programming & setup
and programming software (KPG-66D) are required for programming.
DC power
supply or
duplexer?
NO
YES
Installation in the
optional space
External speaker?
NO
YES
KES-4 installation
Delivery
2
TKR-850
OPERATING FEATURES
1. Controls and Functions
1-1. Front Panel
1
2
3
4
5
9
8
7
6
1 Speaker
2 CH/STATUS Display
Two, 7-segment digits display the channel number or sta-
tus.
7 Programmable Function keys
Press these keys to activate their programmable func-
tions.
PF1 key (left side)
PF2 key
PF3 key
PF4 key
PF5 key
PF6 key (right side)
Default : None (No function)
Default : Repeat disable/enable
Default : TX disable/enable
Default : Take over
Default : Monitor on/off
Default : Channel up
3 VOLUME control
Rotate to adjust the volume.
4 DC source ON/OFF switch
5 DC source indicator
Lights green when DC source is applied from the DC
13.6V jack (DC 13.2V jack on E type versions). Lights red
when DC source is applied from the BACKUP battery ter-
minal.
8 BUSY indicator
Lights green while a signal is being received.
6 MIC jack
Connect a microphone to this 8-pin modular jack.
9 TX indicator
Lights red while transmitting.
1-2. Rear Panel
1
2
8
3
4
9
7
6
5
1 TX OUT jack
Connect a TX antenna or a duplexer to this receptacle.
5 DC 13.6V (K type) / DC 13.2V (E type) jack
Connect a 13.6 V (K type) or 13.2 V (E type) DC power
supply to this jack.
2 CONTROL I/O jack
Connect an external programming device or repeater
controller to this DB-25 interface.
6 BACKUP battery terminal
7 TEST/SPKR jack
Test input/output jack. Connect an external speaker to
this jack.
3 FUSE
Insert 15 A blade fuses into these fuse holders.
4 RX IN jack
Connect a RX antenna or a duplexer to this BNC recep-
tacle.
8 Cooling fan
9 Optional space
For external DC power supply, or duplexer, etc.
3
TKR-850
OPERATING FEATURES
2. Two 7-segment LED
Displays
• Channel display (1~16) : While operating normally in user
mode.
• “E2” is displayed when the channel data is not written.
• When the displayed channel is contained in scan se-
quence, the right side decimal point is displayed.
• “E3” is displayed when PLL is unlocked.
Receiver PLL unlocked = flashing BUSY LED.
Transmitter PLL unlocked = flashing TX LED.
• When the displayed channel is the priority channel, the
left side decimal point is displayed.
• “E4” is displayed when PTT is attempted on a channel
number that has no frequency data programmed.
• “SC” is displayed while in scan mode.
• “PC” is displayed while in PC mode.
• “PG” is displayed while in firmware programming mode.
2 decimal points displayed = 115,200bps
1 decimal point displayed = 57,600bps
No decimal = 38,400bps
• “E1” is displayed when FPU data is not written.
4
TKR-850
OPERATING FEATURES
3. Programmable Functions
TKR-850 contains many Programmable Functions tabled below.
Programmable Function
AUX Out 1~5 Off
AUX I/O 1~6 Off
AUX Out 1~5 On
AUX I/O 1~6 On
AUX Out 1~5 On/Off
AUX I/O 1~6 On/Off
Channel 1~16
Channel Down
Channel Up
CW ID On
CW Message 1~8 On
Display Off
Display On
Display On/Off
Description
AUX Out 1 to 5 ports become deactivated, respectively.
AUX I/O 1 to 6 ports become deactivated, respectively.
AUX Out 1 to 5 ports become activated, respectively.
AUX I/O 1 to 6 ports become activated, respectively.
AUX Out 1 to 5 ports are toggled between its active and inactive states, respectively.
AUX I/O 1 to 6 ports are toggled between its active and inactive states, respectively.
Directly select Channel 1 to 16, respectively.
The channel decrements by one.
The channel increments by one.
The CW ID is transmitted.
The CW Message 1 to 8 is transmitted, respectively.
All panel LEDs are turned off except the Power LED.
All panel LEDs become active as normal status indicators on the repeater.
All panel LEDs, with the exception of the Power LED, are toggled between off and their normal status on
the repeater.
Hold Time Enable
Hold Time Disable
Hold Time Disable/Enable
Local Tx Disable
Local Tx Enable
Local Tx Disable/Enable
Monitor Off
Monitor On
Monitor On/Off
Monitor Momentary
Multi Table Sub
Multi Table Main
Multi Table Main/Sub
QT/DQT Dec Disable
QT/DQT Dec Enable
QT/DQT Dec Disable/Enable
QT/DQT Enc Disable
QT/DQT Enc Enable
QT/DQT Enc Disable/Enable
Repeat Disable
Repeat Enable
Repeat Disable/Enable
Reset
DC Power Save Off
DC Power Save On
DC Power Save On/Off
The Parameter of Repeat Hold Time is enabled.
The Parameter of Repeat Hold Time is disabled.
The Parameter of Repeat Hold Time is toggled between disabled and enabled.
The local mic’s PTT is disabled.
The local mic’s PTT is enabled.
The local mic’s PTT is toggled between disabled and enabled.
The QT/DQT decoder is disabled.
The QT/DQT decoder is enabled.
The QT/DQT decoder is toggled between disabled and enabled.
The QT/DQT decoder is momentarily disabled.
Multi Table No. Select Signalling changes to the Multi Table Sub.
Multi Table No. Select Signalling changes to the Multi Table Main.
Multi Table No. Select Signalling changes between Multi Table Sub and Multi Table Main.
Disables the QT/DQT decode operation.
Enables the QT/DQT decode operation.
Toggles between disabling and enabling the QT/DQT decode operation.
Disables the QT/DQT encode operation.
Enables the QT/DQT encode operation.
Toggles between disabling and enabling the QT/DQT encode operation.
Disables repeater operation.
Enables repeater operation.
Toggles between disabling and enabling repeater operation.
Resets to default condition set up by FPU.
Activates DC Power Save Mode Off.
Activates DC Power Save Mode On.
Toggles between DC Power Save Mode On and Off.
5

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