Kenwood Ts-2000x All Mode Multi-band Transceiver Service Manual

							21
TS-2000/X
DET
VSF VSR 430ANT X57-606
(43RX)
Q905
Final (X45-360 B/2)
Q903Q902Q901D6 X57-606

Progressive wave and reflected wave output circuits
The signal is detected by L7, D3 and D4.  A voltage out-
put corresponding to the progressive wave and reflected
wave is produced by synthesizing the magnetically com-
bined component by L7 with the corrected electrostatically
combined component by TC1 and C9 and detecting the re-
sulting signal.
It is adjusted by TC1 so that the reflected wave voltage
under a 50Ω load is minimized.  VR1 adjusts the frequency
characteristics in the 50MHz band.
These outputs are synthesized with detected output of
the 144MHz band and are fed to the TX-RX1 unit (X57-605).

Antenna turner detection circuit
The passing current is converted to voltage by L9, and
the voltage is stepped down and detected by L10.  One of
these components is buffered by Q1 and Q2 and rectified by
Q3 and Q4, are input to the phase comparator (IC2) .  The IC
determines the IC2 Q output “H” or “L” according to the
phase difference with a D-flip-flop.  The other component is
detected by diodes (D10 and D11) and the amplitude differ-
ence is compared with the comparator (IC1).
The capacitor capacitance on the input side is changed
according to the phase difference detection output, and the
capacitor capacitance on the output side is changed accord-
ing to the amplitude difference detection output.

UHF final unit (X45-360 B/2)
The 430MHz band transmit signal output from the TX-
RX2 unit (X57-606) is amplified to 50W by four amplifiers
(Q901, 902, 903 and 905).  The final unit consists of single
amplifiers Q901, 902, 903 and 905.  The input and output of
the final stage is composed of micro-strip lines.  The pro-
gressive wave and reflected wave detection circuit is also
made of micro-strip lines and used for power control and
reflected wave protection.
LPF
1.8MHz
3.5MHz
7MHz
10MHz : E
14MHz : E, 10&14MHz : K
21MHz
28MHz
50MHz AT–12dB
TXRX
L10L9
CK
D
Q
IN–
IN+Q1 Q3
Q2 Q4
1
1
3 2
D10
D11 IC2
IC1 Q
output
L7
Filter (X51-315)
HF RX ANT
AT T
X57-605 ANT1 ANT2
Q6,7 X45-360
(A/2)
VSR
VSFX57-605
C9
VR1
TC1
D4 D3L6 L8
1.2GHz Unit Transmitter Section
The 10.595MHz transmit signal from 12TIF is amplified in
the sending IF amplifier (Q304).  This signal is input into the
sending mixer (Q1 and Q2).
The 135.395MHz signal converted in Q1 and 2 passes
through the MCF (XF2) and IF amplifier (Q3), is input into the
diode mixer (D1) and converted to 1240~1300MHz.  This
signal is amplified to approximately 0dB in the sending RF
amplifier (IC1 and Q5), then input to IC2.
It is amplified to approximately 1W in the drive power
module (IC2) and to approximately 10W in the final power
module (IC3), then sent to the antenna terminal (12ANT).
D1 Q3Q304 XF2
135.395
MHzQ1,2
D10
1104~
1165MHz124.800
MHzQ15
TX-RX 3 (X57-607) D810.695
MHz
Q48 12TIFX57-605
12ANT
D5IC3IC2IC1Q5L12L10
1240~
1300MHz1240~
1300MHz
Fig. 16Fig. 17
Fig. 18
CIRCUIT DESCRIPTION 
						

							22
TS-2000/X
Digital Control Circuit

Outline
The TS-2000/X control circuit has a multi-chip configura-
tion centered around a main microcomputer (IC8), and con-
tains a latch circuit for input/ output, a TNC and a DSP.  Refer
to the digital control block diagram.

Main microcomputer peripherals
Four serial communication devices utilizing a UART func-
tion (panel microcomputer, TNC, mobile head and PC serial
port) are connected to the main microcomputer.  An
EEPROM (IC7) for backup and a DTMF decoder (IC12) for
DTMF signal detection are also connected to the microcom-
puter.
The input/output circuit and DSP are connected through
an address bus and a data bus.  The bus to the DSP is con-
nected through 5V ↔ 3V voltage conversion ICs (IC9, IC10,
and IC11)
The microcomputer operates with an internal core volt-
age of 3.3V, an external I/O voltage of 5V and an internal
frequency of 22.1184MHz (11.0592MHz x 2).

TNC
The TNC is the same as the one used in the TH-D7.  The
TNC uses a lithium battery to back up various settings.
When a 9600bps communication speed is used, the TNC
analog signal is connected directly to the transmitter/re-
ceiver circuit without passing through the DSP.

Input/output latch circuit
A latch IC is used in stead of several input/output ports.
Since the latch IC has a latch function only, the latch circuit
contains an input latch logic circuit (IC13, IC14, IC15) and an
output latch logic circuit (IC16, IC17, IC18) to generate the
signals required for the latch IC using the main
microcomputer’s address bus information.  This configura-
tion is also used for the latch IC of the DSP section.

Other peripheral circuits
The main microcomputer is connected with other periph-
eral circuits, such as a reset circuit that generates a reset
signal, a reduced voltage detection circuit that detects re-
duced voltage and generates a reduced voltage signal, and
an over-voltage detection circuit that detects over-voltage
and generates an over-voltage signal.
DSP1 address bus (3V) Main
microcomputer
IC82 Chip TNC
(by TASCO)
DTMF decoder
LC73881
IC12PC (RS-232C)Latch IC for outputTC74VHC573FT
IC21~IC25
Latch IC for outputTC74VHC573FT
IC505,IC506 Reset circuit
Over voltage
detection circuit
Latch IC for inputTC74VHC573FT
IC19,IC20
Latch IC for inputTC74VHC573FT
IC512,IC514 Data bus (5V) Address bus (5V)
DSP1 data bus (3V) Logic circuit
for input latch
IC13~IC15
Logic circuit
for input latchIC509~IC511,IC513
CODEC IC
AK4518
IC522 EEPROM
ATMEL
AT25128N
IC7
Address bus (3V)
Data bus (3V)
DSP2 address bus (3V)DSP2 (IF DSP)
TMS320VC5402PGE
IC515 CODEC IC
AK4524
IC518
FLASH ROM
IC504 DSP2 data bus (3V) RIFControl (X53-391)
SDET
TIF
AGCMA
SA
MANO
SANO
MIC/DRU
VS-3
Over voltagedetection circuit
FLASH ROM
IC508
DSP1 (AF DSP)
TMS320VC5402PGE
IC516CODEC IC
AK4518
IC523
Panel micro-
computerMobile
head
Conversion
from 5V to 3V
IC10,IC11
Conversion
between 5V and 3VIC9
Logic circuit
for output latchIC16~IC18
Logic circuit
for output latchIC507 Input port
Input port
Output port
Output port
Fig. 19 Digital control block diagram
CIRCUIT DESCRIPTION 
						

							23
TS-2000/X

Firmware
The main microcomputer firmware includes adjustment
firmware and user firmware.   When repairs or adjustments
are made in service, the user firmware must be rewritten to
make adjustment firmware.  It must be restored to the origi-
nal user firmware after repairs or adjustments.   The adjust-
ment firmware provides a warning display and a warning
sound when the power goes on.
DSP Circuit

Outline
The TS-2000/X DSP circuit is composed of two DSPs
(IC515 and IC516) and CODEC ICs (IC518, IC522 and
IC523), an input latch circuit, flash ROM (IC504 and IC508).
It is connected with the main microcomputer (IC8) by an
address bus and a data bus through the voltage conversion
ICs (IC9, ID10 and IC11).  The SSB, CW, AM and FSK detec-
tion, modulation and AGC operation are done by the DSP,
and digital processing (digital filtering, noise reduction, etc.)
is performed in all modes.

DSP
The DSP operates with an internal core voltage of 1.8V,
an external I/O voltage of 3.3V and an internal frequency of
99.5328MHz (11.0592MHz x 9).
The two DSPs perform the respective IF processing and
AF processing.  The IF processing is done by DSP2 (IC515)
and a 24 bit CODEC IC (IC518) is connected to it.  DSP2
performs detection, modulation, AGC processing and IF
digital filtering.  It is designed so it does not exceed the pro-
cessing time, even if the main band transmission and recep-
tion and sub-band reception are done simultaneously.  An
output latch circuit is connected to DSP2 to convert the ana-
log AGC voltage signal from digital to analog before output.
The conversion is done by the ladder resistance method.
The AF processing is done by DSP1 (IC516) and a 16 bit
CODEC IC (IC522, IC523) is connected to it.  DSP1 performs
the speech processing (signaling generation, detection,
noise reduction,  speech filtering, and various volume pro-
cessing).  The input latch circuit is connected to DSP1 and
various signals from the main microcomputer and the micro-
phone selection signal are input into it.

Flash ROM
The respective programs and data are stored in the Flash
ROM (IC508 and IC504) connected to DSP1 and DSP2.

CODEC IC
A 24 bit CODEC IC (IC518)  is used as the IF signal sys-
tem.  DSP2 carries out 32 bit digital processing for detection
and modulation.  The operation of this IC is controlled by the
main microcomputer.
Two 16 bit CODEC ICs  (IC522 and IC523) are used as the
AF signal system.  These IC outputs directly enter the AF
amplifier, are amplified and then output from the speaker.
The IC input consists of the MIC input and the optional
speech synthesis unit (VS-3).
The various timing signals required by both CODEC ICs
are generated and supplied by a 12.288MHz quartz crystal
and a peripheral circuit.

Communication between DSPs
DSP1 and DSP2 are connected via serial communication
and perform such interchanges as audio signals for trans-
mission processed in DSP1, received speech signals de-
tected in DSP2 and information from the DSP1 input latch
circuit.  If this interchange does not go well when the power
starts up, a “DSP COMM” error will be displayed on the
LCD and the fact that the DSPS is not operating will be noti-
fied to the main microcomputer.  Likewise, when the con-
tent of the flash ROM is abnormal, a “DSP COMM” error is
displayed.
CIRCUIT DESCRIPTION 
						

							24
TS-2000/X
FINAL UNIT (HF) (X45-360X-XX) (A/2)
Ref. No. Use / Function Operation / Condition
Q1,2Predrive amplifierHF/VHF band amplifier
Q3,4 Drive amplifier HF/VHF band push-pull wide-band
 amplifier
Q6,7 Final amplifier HF/50MHz band push-pull wide-
band amplifier
Q8 Bias control HF/50MHz band final stage bias
current control
Q101,102Final amplifier VHF band push-pull wide-band
amplifier
Q103 Bias control VHF band final stage bias current
control
Q201 Switching ANT1 and ANT2 changeover relay
control
Q202 Switching AT relay control
Q203 Switching HF RX antenna relay control
Q204 Switching Fan control (high speed)
Q205 Switching Fan control (low speed)
Q206 SwitchingHigh power supply voltage protection
Q207 Switching Power relay control (K201)
Q208~215SwitchingHF/50MHz band LPF band changeover
Q216,217
Switching VHF band TX/RX changeover relay
control
IC201,202AVR SB→8V
IC203 AVR SB→10V
IC204 AVR 8V→5V
IC205 Extended I/O LPF control signal serial-parallel
IC801 Extended I/OAT input C control signal serial-parallel
IC802 Extended I/OAT output C control signal serial-parallel
IC803 Extended I/O AT coil control signal serial-parallel
D1 SwitchingHF/VHF band drive input changeover
D2,3 Temperature Drive stage bias current control
compensation
D5 SwitchingHF/VHF band drive stage bias changeover
D6 Surge absorption Relay (K1)
D7,8 Temperature HF/50MHz band final stage bias
compensation current control
D101 High-frequency VHF band reflected wave detection
rectification
D102 High-frequency VHF band forward wave detection
rectification
D103,104Temperature VHF band final stage bias current
compensation control
D201 Surge absorption Power surge protection
D202 Surge absorption Fan
D203 Zener diode Over voltage detection
D204 Surge absorption Relay (K201)
Ref. No. Use / Function Operation / Condition
D206~209Surge absorption IC205 output line protection
D210 Reverse current VHF band TX/RX relay control line
prevention
D801~824Surge absorption Antenna tuning relay (K801~824)
FINAL UNIT (430) (X45-360X-XX) (B/2)
Ref. No. Use / Function Operation / Condition
Q901,902Predrive amplifierUHF band amplifier
Q903 Drive amplifier UHF band amplifier
Q904 Bias control Final stage bias current control
Q905 Final amplifier UHF band final stage amplifier
D901 Temperature Drive stage bias current control
compensation
D902,903Temperature Final stage bias current control
compensation
D904 High-frequency Forward wave voltage detection
rectification
D905 High-frequency Reflected wave voltage detection
rectification
D906 Switching Antenna switch
D908,909Switching Antenna switch
FILTER UNIT (X51-315X-XX)
Ref. No. Use / Function Operation / Condition
Q1 Signal amplifier AT phase signal amplifier
Q2 Signal amplifier AT amplitude signal amplifier
Q3 Signal amplifier AT phase signal amplifier
Q4 Signal amplifier AT amplitude signal amplifier
IC1 ComparatorAT control amplitude signal discrimination
IC2 D flip-flopAT control phase signal discrimination
D2 Surge absorption Relay (K2)
D3 High-frequency HF/50MHz band reflected wave
rectification detection
D4 High-frequency HF/50MHz band forward wave
rectification detection
D5~7 Surge absorption Relay (K1,K3,K4)
D8,9 Surge absorption Lightning surge protection
D10 High-frequency AT phase signal detection
rectification
D11 High-frequency AT amplitude signal detection
rectification
D201,251 Surge absorption Relay (K201/K202, K251/K252)
D301,351 Surge absorption Relay (K301/K302, K351/K352)
DESCRIPTION OF COMPONENTS 
						

							25
TS-2000/X
Ref. No. Use / Function Operation / Condition
D401,451 Surge absorption Relay (K401/K402, K451/K452)
D501,551 Surge absorption Relay (K501/K502, K551/K552)
Ref. No. Use / Function Operation / Condition
IC30 ComparatorWaveform shaping of modem TX signal
IC31 AND Sends DSP1 and DSP2 WAIT
signal to CPU through AND circuit
IC32,33 Reset IC
IC501 AVR 3V within control
IC502,5031.8V AVR for DSP1.8V
IC504Flash ROM for DSP2For program and coefficient storage
IC505,506For DSP port outputUsed as output port (AGC output)
IC507 Input/output port Logic of latch IC used as input/
logic output port
IC508Flash ROM for DSP1For program and coefficient storage
IC509 Input/output port Logic of latch IC used as input/
logic output port
IC510 Input/output port
logic
IC511 Input/output port Logic of latch IC used as input/
logic output port
IC512For DSP port inputUsed as input port
IC513 Input/output port Logic of latch IC used as input/
logic output port
IC514For DSP port inputUsed as input port
IC515 DSP For IF processing
IC516 DSP For AF processing
IC517Analog AGC bufferAnalog AGC voltage buffer
IC518 CODEC (24 bit) RIF input, TIF output
IC519,520For CODEC
clock division
IC521 For CODEC
Operation at 12.288MHz frequency
clock division
IC522,523CODEC (16 bit) Microphone input, AF output
IC524~529Buffer for analogConnection to CODEC input/output
signal input/output
IC530 Serial/parallel For microphone input changeover
IC531~534Analog switch For input/output changeover
IC535 Buffer for analog
Connection to CODEC input/output
signal input/output
D5,6 Reverse current
prevention
D11,12 Reverse current
prevention
D13
Reference voltage
source
D14~17 Reverse current
prevention
D501~504Reverse current
prevention
CONTROL UNIT (X53-391X-XX)
Ref. No. Use / Function Operation / Condition
Q1 SwitchingTT signal output control of external AT
Q2 SwitchingTT signal input control of external AT
Q3 SwitchingTS signal output control of external AT
Q4 SwitchingTS signal input control of external AT
Q5 Switching Power on at L level
Q9,10 Switching
Q13 Buffer amplifier 9600 bps RX signal
Q14 Buffer amplifier 1200 bps RX signal
Q15,16 AmplifierWaveform shaping of TNC TX signal
Q17 Switching Backup processing control of panel
microcomputer
Q18 Switching RS-232C related power source
(X57-605 A/9)
Q19,20 Switching
Q501 Switching
IC1 Reset IC For main microcomputer
IC2 AVR Digital system 5V generation
IC3 AVR 5V constantly on
IC43.3V AVR for DSP3.3V
IC5,6 Analog switch Main microcomputer ADC input
changeover
IC7 EEPROM For storage of various set values
IC8Main microcomputerPrimary main unit operation
IC9
Conversion betweenTwo-way conversion
5V and 3V
IC10,11 Conversion from Main microcomputer and DSP data
5V to 3V conversion
IC12DTMF decoder ICFor DTMF decoding
IC13~18 Input/output port Logic of latch IC used as input/
logic output port
IC19,20 Input port Used as input port for main micro-
computer
IC21~25 Output port
Used as output port for main micro-
computer
IC26TNC microcomputerDedicated TNC microcomputer
IC27 OP amplifier A/2 : 1200 bps RX AF amplifier
B/2 : 9600 bps RX AF amplifier
IC28 TNC logic circuit TNC logic
IC29 OP amplifier A/2 : 1200 bps RX AF amplifier
B/2 : 9600 bps RX AF amplifier
DESCRIPTION OF COMPONENTS 
						

							26
TS-2000/X
DISPLAY UNIT (X54-3320-00)
Ref. No. Use / Function Operation / Condition
Q1~3 AVR LCD backlight
IC1 LCD driver LCD 7-segment driver (B-SEG)
IC2 LCD driver LCD 7-segment driver (A-SEG)
IC3 LCD driver LCD dot segment driver
IC4 Serial/parallelLED control, backlight dimmer control
D1 LED On when VOX is selected
D2 LED On when PROC is selected
D3~9 LED Key illumination
Ref. No. Use / Function Operation / Condition
Q43 Amplifier HF/50MHz TX drive amplifier
Q44,45 TX 3rd mixer Converts 68.985/75.825MHz to TX
frequency
Q46,47 TX 2nd mixer Converts 10.695MHz to 68.985/
75.825MHz
Q48 Buffer amplifier 10.695MHz
Q49TX 2nd IF amplifier10.695MHz
Q51 Switching Keying control
Q52DC buffer amplifierALC keying control
Q53 Switching On during TX in non-FM mode
Q54TX 2nd IF amplifier10.695MHz
Q57 SwitchingOn during transmission in FM mode
Q58 Limiter FM modulation signal limiter
(elimination of AM component)
Q59 OscillatorFM oscillator, modulation 10.595MHz
Q60 Switching On during TX in non-FM mode
Q61,62 Mute On when main and sub are
simultaneously AF muted
Q63,64 DC-DC oscillator –6V generation
Q65 SwitchingOn when relay for HF band linear is used
Q66 Switching On when relay for HF band linear
is transmission
Q67 SwitchingOn when relay for HF band linear is used
Q69,70 AVR AVR for mobile controller
(Power about 9.4V)
Q71,72 Switching 50MHz/VHF/UHF/1.2GHz band
external linear control
Q73,74 Amplifier ALC amplifier
Q75 Switching On in AM mode, makes it an
average value type ALC
Q76 Amplifier ALC amplifier
Q77 Switching Turns on and lowers the power at
time of protection
Q78,79 Amplifier ALC amplifier
Q80~91 Switching Produces the respective TXB and
RXB from 8C to HF/50MHz, VHF
band, UHF band and 1.2GHz bands.
The synthesis of the TXB becomes
IF TXB and the synthesis of the
RXB becomes IF RXB.
This control voltage is necessary
for simultaneous TX/RX, such as
for satellite communication.
Q92 Switching Cancels the time constant for VSF
and VSR voltage lines during
antenna tuning
Q93 Buffer amplifier Buffer amplifier for external
modulation input signal
TX-RX 1 UNIT (X57-605X-XX)
Ref. No. Use / Function Operation / Condition
Q1 RF mute On in HF/50MHz TX mode
Q2 Switching On in HF/50MHz RX mode
Q3 Switching Q2 control
Q4 Switching Dedicated external RX antenna
changeover relay control
Q5 Switching HF/50MHz RF ATT control
Q6 Switching On in 50MHz TX mode
Q7~10 RX 1st mixer RX 1st IF 69.085/75.925MHz
Q11 SwitchingOff when HF/50MHz preamplifier on
Q12 RF amplifier When HF-21.5MHz
Q13 Amplifier 1st local oscillation amplifier
Q14,15 Switching Q12 control
Q16,17 Switching Q16 turns on when first IF change-
over control is 75.925MHz
Q18 Amplifier RX 1st IF 69.085/75.925MHz
Q19,20 RX 2nd mixer Converts RX 1st IF to 10.695MHz
Q21 Switching Reserved
Q22 Amplifier For NB 10.695MHz
Q25 Amplifier RX 2nd IF amplifier 10.695MHz
Q26 Amplifier NB amplifier 10.695MHz
Q27 DC amplifier NB AGC amplifier
Q28 Amplifier NB amplifier 10.695MHz
Q29 Switching On at time of NB blanking
Q30 Buffer amplifier Impedance changeover
Q31 Switching On at time of NB blanking
Q32 Amplifier RX 3rd local oscillation amplifier
(11.150MHz)
Q33 SwitchingOn when 1st IF frequency is 69.085MHz
Q34 Switching Creates RXB in FM mode
Q37 Switching Creates RXB in non-FM mode
Q38 Amplifier 3rd IF amplifier (455kHz)
Q40 Switching On during RX in non-FM mode
Q41 AmplifierRX 4th local oscillation amplifier (467kHz)
Q42 Buffer amplifier 4th IF frequency (12kHz)
DESCRIPTION OF COMPONENTS 
						

							27
TS-2000/X
Ref. No. Use / Function Operation / Condition
Q94,95 Buffer amplifier Buffer amplifier for ANO output of
main and sub band
Q96 Switching External squelch output of main
and sub bands (open collector)
Q97DC buffer amplifierRipple filter for AF IC (IC9) power supply
Q101~112Switching On when RF BPF SW is selected
Q601 Amplifier 31.2MHz
Q602 Buffer amplifier RX 4th local oscillator (467kHz)
Q603 Amplifier 31.2MHz
Q604 Buffer amplifier TX 1st oscillator (10.595MHz)
Q605 Amplifier 31.2MHz
Q606 Buffer amplifier RX 3rd local oscillator (11.150MHz)
Q607,608SwitchingOn when 1st IF frequency is 69.085MHz
Q609 Switching DC switch
Q700,701Mixer RX 3rd mixer and 3rd IF frequency
(455kHz)
Q702 Switching Gain correction, on when RX 1st IF
is 69.085MHz
Q703 Switching L69 tuning correction, on when RX
1st IF is 69.085MHz
Q704 Switching On during TX in FM mode
Q705 Amplifier On RF amplifier is 21.5~60MHz
Q706~708Switching On at time of Q705 operation
Q709 Buffer amplifier 455kHz
Q710 Amplifier Squelch noise amplifier
Q711TX 2nd IF amplifier10.695MHz
Q712,714Switching On during TX in FM mode
Q715 Amplifier DRU output amplifier
Q800 Switching On when FUNC switch is selected
Q801 AVR For LED
Q802 Switching On in main band TX mode
Q803 AVR For LED
Q804 Switching On when main band BSY
Q805 AVR For LED
Q806 Switching On in sub band TX mode
Q808 Switching On when sub band BUSY
Q811 SwitchingOn when modem 9600 bps is selected
Q813 Switching On when modem STA is active
Q815 Switching On when a modem is connected
Q817 Switching On when MULTI ENC is sctive
Q819 Switching On when sub receiver is on
Q820,822Switching On when key illumination is on
Q951 Switching Reset control
IC1 FM IF IF amplifier, Squelch
IC2 OP amplifier A/2 : ALT voltage buffer
B/2 : FM AF amplifier
IC3 Mixer RX 4th mixer (Output : 12kHz)
Ref. No. Use / Function Operation / Condition
IC4 OP amplifier A/2 : Unused
B/2 : AGC reference voltage buffer
IC5 Extended I/O RF BPF changeover control
IC6 Mixer TX 1st mixer (Output : 10.595MHz)
IC7 Multiplexer Receiver output, FM (AF) and non-
FM (IF) changeover
IC8 Analog switch
Modulation input, FM (AF), non-FM
(IF) and packet (AF) changeover
IC9 AF PA Main and sub 2 channels
IC10 Level converter RS-232C level and 5V conversion
IC11 Buffer amplifier Voltage buffer
IC12 OP amplifier 1/4 : 
TX power gain control voltage buffer
2/4 : Unused
3/4 : 
RX IF gain control voltage buffer
4/4 : TX band gain control voltage buffer
IC13 OP amplifier A/2 : ALC reference voltage buffer
B/2 : ALC meter voltage buffer
IC14 DAC 1/8 : TX power control voltage
2/8 : ALC reference voltage
3/8 : Unused
4/8 : Protection voltage
5/8 : TX power gain control voltage
6/8 : Unused
7/8 : TX band gain control voltage
8/8 : RX IF gain control voltage
IC15 DAC 1/8 : 
HF/50MHz TX BPF control voltage
2/8 : RF unit RX sub BPF control voltage
3/8 : RF unit RX main BPF control voltage
4/8 : RF unit TX UHF BPF control voltage
5/8 : H in non-FM mode
6/8 : Unused
7/8 : Unused
8/8 : NB level control voltage
IC16 Extended I/O Q0 : L when RX 10.695MHz XF5 is
selected
Q1 : L when RX 10.695MHz XF6 is
selected
Q2 : L when RX 10.695MHz
through is selected
Q3 : L when AT tuning
Q4 : 
L when RX 455kHz CF1 is selected
Q5 : L when RX 455kHz CF2 is selected
Q6 : L when RX 455kHz CF3 is selected
Q7 : Reserved
Q8 : Reserved
Q9 : Unused
Q10 : 
H when main squelch is open
Q11 : H when sub squelch is open
DESCRIPTION OF COMPONENTS 
						

							28
TS-2000/X
Ref. No. Use / Function Operation / Condition
IC17 Extended I/O Q0 : H when UHF ATT is on
Q1 : H when VHF ATT is on
Q2 : H when HF/50MHz ATT is on
Q3 : L when external RX antenna
terminal is selected
Q4 : L when HF/50MHz preampli-
fier is selected
Q5 : H when RX 1st IF 75.925MHz
is selected
Q6 : H during AM TX
Q7 : H during TX in PKD and 9600
bps is selected
Q8 : H during TX in non-FM mode
Q9 : H during RX in non-FM mode
Q10 : H when linear amplifier usage
is selected in HF or 50MHz band
Q11 : H when linear amplifier usage
is selected in either band
IC18 OP amplifier A/2 : 5V voltage source
B/2 : Amplifier 455kHz
IC19 OP amplifier A/2 : VSR voltage amplifier
B/2 : VSF voltage amplifier
IC601 DDS RX 4th local oscillator (467kHz)
IC602 DDS TX 1st local oscillator (10.595MHz)
IC603 DDS RX 3rd local oscillator (11.150MHz)
IC604 Inverter Polarity inversion
IC605 AVR 14S→8V
IC801 CPU Display microcomputer
D1 Surge absorption Relay (K1)
D2 Surge absorption External RX antenna terminal
D3 Surge absorption Relay (K2)
D4~6 Surge absorption Internal circuit protection
D7 Switching RX/TX changeover, on during RX
D8 Switching On when RF BPF under 1.705MHz
is selected
D9 Surge absorption Internal circuit protection
D10 Switching On when RF BPF under 1.705MHz
is selected
D11 Switching On when RF BPF over 1.705MHz
is selected
D12,13 Switching
On when RF BPF of 1.705~2.5MHz
is selected
D14,15 Switching On when RF BPF of 2.5~4.1MHz
is selected
D16,17 Switching On when RF BPF of 4.1~6.9MHz
is selected
D18,19 Switching On when RF BPF of 6.9~7.5MHz
is selected
Ref. No. Use / Function Operation / Condition
D20,21 Switching On when RF BPF of 7.5~10.5MHz
is selected
D22,23 Switching
On when RF BPF of 10.5~13.9MHz
is selected
D24,25 Switching
On when RF BPF of 13.9~14.5MHz
is selected
D26 Switching RX/TX changeover, on during TX
D27,28 Switching
On when RF BPF of 14.5~21.5MHz
is selected
D29,30 Switching On when RF BPF of 21.5~30MHz
is selected
D31,32 Switching On when RF BOF of 30~49MHz
and 54~60MHz is selected
D33,34 Switching On when RF BPF of 49~54MHz is
selected
D35,36 SwitchingOn when ~60MHz preamplifier is on
D38,39 SwitchingOn when ~21.5MHz preamplifier is on
D40 Switching HF/50MHz LO1 TX/RX changeover
D41,42 Switching RX 1st MCF changeover
D45 Switching HF/50MHz LO2 changeover
D46 Switching HF/50MHz and VHF/UHF band RX
IF input changeover, 10.695MHz
D47 Switching 1.2GHz RX IF input changeover,
10.695MHz
D48 Reverse current Main RBK and NB mute signal
preventionmatching, main side mute when on
D49 Switching 10.695MHz IF filter changeover,
on when wide (6kHz) is selected
D50 Switching 10.695MHz IF filter changeover,
on when narrow (2.7kHz) is selected
D52 Switching 10.695MHz IF filter changeover,
on when through is selected
D53 Switching 10.695MHz IF filter changeover,
on when narrow (2.7kHz) is selected
D55 Switching 10.695MHz IF filter changeover,
on when wide (6kHz) is selected
D56 Switching 10.695MHz IF filter changeover,
on when through is selected
D57 Switching 10.695MHz IF filter changeover,
on when wide (6kHz) is selected
D58 Switching 10.695MHz IF filter changeover,
on when narrow (2.7kHz) is selected
D60 Switching 10.695MHz IF filter changeover,
on when through is selected
D61 Switching 10.695MHz IF filter changeover,
on when wide (6kHz) is selected
D62 Switching 10.695MHz IF filter changeover,
on when narrow (2.7kHz) is selected
DESCRIPTION OF COMPONENTS 
						

							29
TS-2000/X
Ref. No. Use / Function Operation / Condition
D64 Switching 10.695MHz IF filter changeover,
on when through is selected
D65 Reverse current Matching of main VHF and main
prevention UHF changeover signal
D66 Detection NB switching pulse detection
D67 Switching 455kHz IF filter changeover
D68 Switching On when FM mode is selected in
main band
D69 Switching 455kHz IF filter changeover
D70,71 Switching 455kHz IF filter changeover
D73 Switching On when non-FM mode is select-
ed in main band
D75 Switching On during HF/50MHz TX
D76~79
Variable capacitorVoltage varies (2 stages) according
to the TX band
D80 Switching TX IF output HF/50MHz, VHF/UHF
changeover
D81 Switching TX IF output 1.2GHz changeover
D82 PIN diodeTX IF gain variable according to TX power
D83 Reverse current Matching of VTXB and UTXB
prevention
D84 PIN diode TX gain setting of each band
D85 Reverse current
prevention
D86 LED For constant voltage
D87~89 Reverse current
prevention
D90 Switching TX IF FM mode/non-FM mode
changeover, 10.595MHz
D91Variable capacitorFM modulation 10.595MHz
D92,93 Reverse current Creates IF TXB
prevention
D94,95 Reverse current Creates IF RXB
prevention
D96 Zener diodeStabilizes minus power source to –6V
D97 Rectifier Creates minus voltage
D98 Surge absorption Relay (K3)
D99 Reverse current Matching of start signals from PC
prevention and mobile panel
D100 Zener diode Port protection
D101 Poly-switch Over voltage detection
D102 Zener diode
Reference voltage of constant voltage
power source for mobile panel
D103,104Surge absorption
D105 LED Creates reference voltage
D106 Reverse current External ALC matching
prevention
D107 Zener diode External ALC voltage shift
Ref. No. Use / Function Operation / Condition
D108 Zener diode Voltage shift
D109,110Reverse current External ALC matching
prevention
D111 Reverse current
prevention
D112 Zener diode Port protection
D113 Zener diode Voltage shift, lower power when
power voltage drops
D114 Zener diode Set so the power does not to rise
when the power voltage goes up
D115,116Reverse current Meter line
prevention
D117,118Reverse current External standby
prevention
D119 Reverse current UHF forward wave
prevention
D120 Reverse current UHF reflected wave
prevention
D121 Reverse current 1.2GHz forward wave
prevention
D122 Reverse current 1.2GHz reflected wave
prevention
D123 Reverse current VHF forward wave
prevention
D124 Reverse current VHF reflected wave
prevention
D130 PIN diode RX gain adjustment 455kHz
D700~702Reverse current
prevention
D703
Variable capacitorVoltage varies (2 stages) according
to the TX band
D704,705Switching On when preamplifier is on at
21.5~60MHz
D706 Reverse current On at 21.5~60MHz
prevention
D707 Rectifier Noise rectification for FM squelch
D708 Reverse current Leak current prevention
prevention
D709 Zener diode 8V→5V
D710 Voltage shift Temperature compensation
D711 Reverse current Discharge path (non-FM mode)
prevention
D712,713Cliper External modulation input
D714 Voltage shift
D715
Variable capacitorVoltage varies (2 stages) according
to the TX band
D716 Reverse current
prevention
DESCRIPTION OF COMPONENTS 
						

							30
TS-2000/X
Ref. No. Use / Function Operation / Condition
D717 Surge protection
D719,720Zener diode External surge voltage protection
D721 Reverse current
prevention
D801 LED On in main band TX mode
D802 LED On when main band BSY
D803 LED On in sub band TX mode
D804 LED On when sub band BSY
D805~809Reverse connectionKey matrix
prevention
D810~824LED Key illumination
D826~834LED Key illumination
D825 LED On when FUNC switch is selected
D950~952Reverse current
prevention
D953 LEDOn when TNC 9600 bps is selected
D954 LED TNC TX buffer state display
D955 LED TNC connection state display
D956 LED On when MULTI is selected
D957 LED Lights when the sub is on
Ref. No. Use / Function Operation / Condition
Q35 Switching Sub RX AM power supply
Q36 Switching VHF sub RX IC6 power supply
Q37 Amplifier Sub RX 1st IF signal amplification
Q38 Amplifier Main RX 1st IF signal AGC control
amplification
Q39 DC amplifier Sub RX AM AGC control signal DC
amplification
Q40,41 Switching Sub RX FM wide/narrow change-
over control
Q42,43 Mixer Main RX 2nd mixer
Q44 Amplifier Main RX 2nd mixer local oscillator
signal amplification
Q45 Amplifier Sub RX AM signal amplification
Q46,47 Mixer TX mixer
Q48 Amplifier Sub RX AM signal amplification
Q50 AmplifierTX mixer local oscillator signal amplification
Q51 Amplifier Sub RX AM signal amplification
Q55 Switching VHF sub RX power supply
Q56 Switching UHF sub RX power supply
Q57 SwitchingSub RX IF amplifier gain RBK control
Q58 Switching VHF main RX preamplifier through
Q59 Switching UHF main RX preamplifier through
Q60 Switching VHF/UHF TX wide-band amplifier
power supply
Q61 Amplifier Main RX 2nd IF signal amplification
Q62 Switching VHF/UHF TX wide-band amplifier
power supply
Q63 AmplifierSub RX squelch signal noise amplification
Q65 Amplifier31.2MHz reference signal amplification
Q66,67 Switching Sub RX band changeover control
Q400~402Active LPF Comparison frequency 5kHz
Q403 Switching HF LO2 VCO changeover
Q404 Switching Sub VCO1 oscillation frequency
changeover
Q405 Switching Sub VCO2 oscillation frequency
changeover
Q406 SUB VCO1 322.950~426.040MHz (K)
371.475~381.475MHz (E)
Q407 SUB VCO2 354.950~465.050MHz (K)
405.050~409.050MHz (E)
Q409 LO2 VCO 58.390~65.230MHz
Q410 Switching Sub VCO1 changeover
Q411 Switching Sub VCO2 changeover
Q412 Doubler 15.6MHz x 2 = 31.2MHz
Q413 Amplifier For sub VCO1
(322.950~426.040MHz (K)
371.475~381.475MHz (E))
Q414 Amplifier For sub VCO2
(354.950~465.050MHz (K)
405.050~409.050MHz (E))
TX-RX 2 UNIT (X57-606X-XX)
Ref. No. Use / Function Operation / Condition
Q1 Switching UHF RX ATT control
Q2 Switching VHF RX ATT control
Q3 SwitchingSub band local oscillator power supply
Q11 Switching VHF RX power supply
Q13 Switching UHF power supply
Q14 Amplifier UHF preamplifier
Q15 Amplifier VHF preamplifier
Q16 Switching UHF RX power supply
Q17 Amplifier UHF TX signal amplification
Q18 Amplifier VHF TX signal amplification
Q19 Amplifier UHF RX signal amplification
Q20 Amplifier VHF TX signal amplification
Q21 Amplifier UHF main RX signal amplification
Q22,23 Amplifier VHF sub RX signal amplification
Q24 Amplifier VHF main RX signal amplification
Q25 Amplifier VHF sub RX signal amplification
Q26 Amplifier UHF TX signal amplification
Q30 AmplifierMain RX local oscillator signal amplification
Q31 Switching Main RX mixer power supply
Q32 Amplifier VHF sub RX local oscillator signal
amplification
Q33 Amplifier UHF sub RX local oscillator signal
amplification
Q34 Amplifier VHF/UHF TX local oscillator signal
amplification
DESCRIPTION OF COMPONENTS