KENWOOD TS2000 - Service Manual Immediate Download

B51-8558-00 (N) 889

ALL MODE MULTI-BAND TRANSCEIVER

TS-2000/X

SERVICE MANUAL

CIRCUIT DESCRIPTION ............................. 2

DESCRIPTION OF COMPONENTS ......... 24

SEMICONDUCTOR DATA ....................... 34

PARTS LIST .............................................. 51

EXPLODED VIEW ..................................... 93

PACKING .................................................. 97

ADJUSTMENT ......................................... 98

TERMINAL FUNCTION .......................... 124

WIRING .................................................. 133

PC BOARD VIEWS / CIRCUIT DIAGRAMS

FILTER UNIT (X51-315X-XX) ............. 135

FINAL UNIT (X45-360X-XX) .............. 137

DISPLAY UNIT (X54-3320-00) ........... 151

CONTROL UNIT (X53-391X-XX) ....... 155

TX-RX 1 UNIT (X57-605X-XX) ........... 169

TX-RX 2 UNIT (X57-606X-XX) ........... 186

TX-RX 3 UNIT (X57-6070-00) ............ 209

BLOCK DIAGRAM .................................. 223

LEVEL DIAGRAM ................................... 229

MC-52DM ............................................... 233

UT-20 ..................................................... 235

RC-2000 ................................................. 235

ARCP-2000 ............................................ 235

SPECIFICATIONS ................................... 236

Knob

(K21-1104-03)

Knob ring

(K29-5395-04)

Knob

(K29-5397-13) x 2

Knob

(K29-5398-03) x 3

Knob

(K29-5399-03) x 3

Knob

(K29-5396-03) x 2

Key top

(K29-5391-02)

Key top

(K29-5393-12)

Key top

(K29-5394-12)

Key top

(K29-5392-12)

Front glass

(B10-2608-02)

Cabinet (Upper)

(A01-2176-01)

Foot

(J02-0442-04) x 2

Foot

(J02-0440-04)

RF coaxial receptacle (Round)

(E06-0858-15)

Phone jack (9P)

(E11-0438-05)

CONTENTS

TS-2000/X

Overview of the Operation

The TS-2000/X basically consists of an all-mode-receiver

incorporating an IF/AF DSP for satellite communication with

an independent FM/AM sub-receiver for the VHF and UHF

bands.

s Overview of the operation of the all-mode trans-

ceiver unit (main band side) with an IF/AF DSP

for satellite communication

The receiver unit has an independent front end for each

of the HF, 50MHz, 144MHz, 430MHz and 1.2GHz bands

(some products do not support the 1.2GHz band). The cir-

cuits following the 10.695MHz IF stage are common to all

the bands. (Thus, it cannot receive two SSB signals at the

same time.)

The IF frequency of the transmitter unit is shifted from

the IF frequency of the receiver unit by 100kHz to enable

satellite operation (full duplex operation). The final section is

independent of the HF, 50MHz, 144MHz, 430MHz and

1.2GHz bands. Consequently, you can select a combination

of bands permitting satellite communication from the HF,

50MHz, 144MHz, 430MHz and 1.2GHz bands.

The transmitter unit and receiver unit on the main band

side operate simultaneously during satellite transmission.

The receiver unit on the sub-band side does not work. (The

sub-band receiver is not used during satellite operation.)

Two 16-bit DSP ICs are used; one performs IF processing

(main band side) and the other carries out AF processing

(main and sub bands). Although the DSP IC is a 16-bit unit, it

carries out "double-precision operations" for critical parts of

IF processing to perform 32-bit equivalent processing. In

addition, the DSP IC uses a 100-MHz high-speed internal

clock. The conversion from an analog signal to a digital sig-

nal (A/D conversion) is performed with 24 bits at high preci-

sion.

The DSP circuit for IF operates in any mode other than

FM mode for both transmission and reception. FM modula-

tion, detection and squelch processing are conventional ana-

log processes. (The processing prior to modulation and af-

ter demodulation in FM is performed by the DSP.)

In the mode in which the IF DSP circuit operates, it car-

ries out modulation and demodulation, digital IF filtering,

digital AGC, and CW waveform processing during transmis-

sion, as in the TS-870. All these functions are operated in all

the bands on the main band side, including satellite opera-

tion.

The AF unit is processed by the DSP in all modes. The

operating range of the DSP circuit depends on the mode,

but it performs beat cancellation, noise reduction, AF DSP

filtering, etc.

s Overview of the operation of the independent

FM/AM sub-receiver unit (sub-band side) for the

VHF and UHF bands

The local oscillator system and IF/AF signal system of the

sub-receiver unit are independent of the main band side.

Therefore, the sub-band receiver can receive signals while

the main band receiver is sending a signal. (Except when

reception is impossible due to harmonics of the transmit fre-

quency and when the main band and sub-band are on the

same frequency band.)

The sub-band receive signal is branched from the RF unit

on the main band side. It is, therefore, not necessary to

install a dedicated antenna for sub-band reception.

Transmission can be performed with the sub receive fre-

quency by shifting the "PTT band" to the sub-band side. It

is made possible by internally using the transmission func-

tion on the main band side.

AF processing is also carried out by the DSP on the sub-

band side and the noise reduction function works.

The sub-band reception function, including display, can

be turned off.

Frequency Configuration (Fig. 1)

This transceiver utilizes double conversion in FM mode

and triple conversion in non-FM modes during transmission.

It utilizes triple conversion in FM mode and quadruple

conversion in non-FM modes during reception. The fourth

12kHz IF signal is converted from analog to digital and con-

nected to the DSP.

When the carrier point frequency of the signal input from

the antenna is fIN, the relationship between these signals

when demodulating this signal is expressed by the following

equations:

HF MAIN

fIN = fLO1 fLO2 fLO3 + fLO4 12kHz

VHF MAIN

fIN = fLO1 fLO2 fLO3 + fLO4 12kHz

UHF MAIN

fIN = fLO1 + fLO2 + fLO3 fLO4 + 12kHz

1.2G MAIN fIN = fLO1 x 2 + fLO2 + fLO3 fLO4 + 12kHz

Reference Signal Generation Circuit

The 15.6MHz reference frequency fstd for PLL frequency

control is generated by the TCXO (X400). The signal passes

through a buffer amplifier (Q420) and is used as the refer-

ence signal for the second local oscillator (HFLO2) for HF

band reception and the first local oscillator (SLO1) subband

reception.

The reference signal is doubled by Q412, and the result-

ing 31.2MHz signal is used as the reference signal for DDSs

(IC406, IC407, IC408, IC601, IC602, IC603).

The 31.2MHz signal is supplied to the TX-RX2 unit (X57-

606 A/11) as LO2 for VHF and UHF bands.

CIRCUIT DESCRIPTION

TS-2000/X

68.985MHz

75.825MHz

TX MIX

69.085MHz

10.695MHz

10.595MHz

75.925MHz

RX MIX

DET

TCAR

10.583MHz

455kHz

LO3

11.150MHz

LO1HF

75.955~

129.085MHz

LO2

58.390~

65.230MHz

RCAR

467kHz

41.795MHz

LO1TX

183.795~418.205MHz (K)

185.795~398.205MHz (E)

RX MIX

41.895MHz

SUB

RX MIX 58.525MHz

LO1RX

183.895~

418.105MHz (K)

185.895~398.105MHz (E)

SLO2

58.070MHz

TX MIX

135.395MHz

RX MIX

135.495MHz

1.2GLO1

1104~

1165MHz

LO31

31.2MHz

Mixer

IF detector

÷2

SLO1

322.95~

465.04MHz (K)

371.475~409.050MHz (E)

HF/

50MHz

UHF

VHF

1.2G

1.2GLO2

124.8MHz

DSP

MIC

input

output

HF/50MHz LO1

When the HF and or 50MHz band is operating in the main

band, the HF REF VCO (Q427) generates 31.17 to 32.834

MHz. (See Table 1, frequency configuration.)

The output signal from the DDS (IC408) is input to pin 8

of the PLL IC (IC409) for HF REF, divided into 1/16 in IC409

to produce comparison frequency fø 2 of 487 to 513kHz.

The output signal from the VCO (Q427) goes to pin 6 of

PLL IC (IC409), is divided into 1/64 in IC409, and compared

with the signal with comparison frequency fø 2 by a phase

comparator. The frequency is locked and the HF REF signal

is output.

The output signal from the PLL IC (IC409) for HF REF is

fed to pin 8 of the PLL IC (IC414) for HF LO1 as a reference

frequency, and divided to produce comparison frequency

fø 1 of 975 to 1358kHz.

The HF LO1 VCO (Q459, Q460, Q464) generates 75.955

to 129.185MHz. The output from this VCO goes to pin 6 of

IC414, is divided into 1/N 1 in IC414, compared with the sig-

nal with comparison frequency fø 1 by a phase comparator.

The frequency is locked and the HF LO1 output frequency is

generated.

The DDS (IC408) sweeps output frequency (7.792 to

8.209MHz) in 10Hz steps by equation fDDS STEP (Hz) =

(10*R 1)/(N 1*4) and in 1Hz steps by equation fDDS STEP

(Hz) = (1*R 1)/(N 1*4), the HF LO1 covers the frequencies

of 75.955 to 129.085MHz in 10Hz or 1Hz steps.

One of three VCOs (Q459, Q460, Q464) is selected by

the signal (HF VCO1,HF VCO2,HF VCO3) from the serial-par-

allel IC (IC404).

The output from the VCOs (Q459, Q460, Q464) passes

through a buffer amplifier (Q462), is amplified by Q476, and

passes through a low-pass filter. The impedance is con-

verted by an attenuator and the signal is output as HFLO1.

The cut-off frequency of the low-pass filter in the output

section is changed by turning Q474 ON/OFF with a VCO se-

lect signal (HF VCO1).

Fig. 1

Frequency configuration

CIRCUIT DESCRIPTION

TS-2000/X

HF LO2

When the HF and or 50MHz band is operating, the

HF LO2 VCO (Q409) generates 65.230 to 58.390MHz. (See

Table 1, frequency configuration.)

The 15.6MHz reference signal fstd is input to pin 8 of the

PLL IC (IC401) for HF LO2, divided into 1/226 and 1/319 in

IC401 to produce comparison frequency fø of 69.027 to

48.903kHz.

The output signal from the VCO (Q409) goes to pin 6 of

IC401, its frequency is divided into 1/945 and 1/1194 in

IC401, compared with comparison frequency fø by a phase

Display frequency

LO1 OUT

IC414 :

HF REF

IC409 :

DDS output (MHz)

fRX (MHz)

(MHz)

LMX2306TMX

(MHz)

LMX2306TMX

IC408 : AD9835BRU

Start

Stop

0.030000

1.999999

LO1

HF REF

fDDS

2.000000

5.999999

= fRX + IF

(fRX + IF)

*R1

HF REF

*R2

6.000000

8.999999

9.000000

12.999999

13.000000

16.999999

17.000000

17.999999

18.000000

21.999999

22.000000

23.999999

100

24.000000

24.999999

25.000000

25.999999

26.000000

29.999999

30.000000

32.999999

100

33.000000

36.999999

37.000000

40.999999

115

41.000000

44.999999

119

45.000000

48.999999

115

49.000000

51.999999

113

52.000000

55.999999

115

56.000000

60.000000

127

LO2 OUT

IC401 :

(MHz)

LMX2306TMX

65.230088

945

226

75.925088

75.825088

58.389969

1194

319

69.084968

68.984968

65.230088

945

226

75.925088

75.825088

58.389969

1194

319

69.084968

68.984968

65.230088

945

226

75.925088

75.825088

58.389969

1194

319

69.084968

68.984968

65.230088

945

226

75.925088

75.825088

58.389969

1194

319

69.084968

68.984968

comparator, and locked. The division ratio data comes from

the control unit.

The output signal from the VCO (Q409) passes through a

buffer amplifier (Q415), is amplified by Q421, and passes

through a low-pass filter. The impedance is converted by an

attenuator and the signal is output as HF LO2.

When the HF and or 50MHz band is not operating, Q403

is turned OFF with the LO2SEL signal and HF LO2 VCO

(Q409) stops operation.

Table 1

Main HF and 50MHz band frequency configuration

CIRCUIT DESCRIPTION

TS-2000/X

144MHz LO1

When the VHF band is operating in the main band, the

VHF REF VCO (Q441) generates 36.057 to 37.288MHz (K),

36.450 to 36.842MHz (E). (See Table 2, Frequency Configu-

ration.)

The output signal from the DDS (IC406) is input to pin 8

of the PLL IC (IC411) for VHF REF and divided into 1/16 in

IC411 to produce comparison frequency fø 2 of 563 to

583kHz (K), 569 to 576kHz (E).

The output signal from the VCO (Q441) goes to pin 6 of

IC411 and its frequency is divided into 1/64 in IC411, com-

pared with the signal with comparison frequency fø 2 by a

phase comparator, and is locked.

The VHF REF PLL output signal is fed to pin 8 of IC410 as

a reference frequency, and divided into 1/30 in IC410 to pro-

duce comparison frequency fø 1 of 1202 to 1243kHz (K),

1215 to 1228kHz (E).

The VHF LO1 VCO (Q433) generates 183.895 to 193.895

MHz (K), 185.795 to 187.895MHz (E) in receive mode and

183.795 to 193.795MHz (K), 185.795 to 187.795MHz (E).

The VCO (Q433) output signal goes to pin 6 of IC410, and

its frequency is divided into 1/N1 in IC410 and compared

with comparison frequency fø 1 by a phase comparator. The

frequency is locked and LO1 is generated.

The DDS (IC406) sweeps output frequency (9.014 to

Display frequency

LO1 OUT

IC410 :

VHF REF

IC411 :

DDS output (MHz)

fRX (MHz)

(MHz)

LMX2306TMX

(MHz)

LMX2306TMX

IC406 : AD9835BRU

Start

Stop

142.000000 (K) 146.999999 (K)

LO1

153

VHF REF

fDDS

144.000000 (E) 146.000000 (E)

= fRX + IF

(fRX + IF)

*R1

VHF REF

*R2

147.000000 (K) 151.999999 (K)

156

IF = RX : 41.895

TX : 41.795

9.321MHz (K), 9.112 to 9.210MHz (E)) in 10Hz steps by

equation fDDS STEP (Hz) = (10*R1)/(N1*4) and in 1Hz steps

by equation fDDS STEP (Hz) =(1*R1)/(N1*4), the LO1 covers

the frequencies of 183.895 to 193.895 MHz (K), 185.895 to

187.895MHz (E) in receive mode and 183.795 to

193.795MHz (K), 185.795 to 187.795MHz (E) in transmit

mode in 10Hz or 1Hz steps.

The PLL output signal is changed by the switching circuit

of Q469 (receive) and Q470 (transmit) so that the output

amplifier and low-pass filter correspond to VHF band trans-

mission and reception.

In receive mode, the signal is amplified by the broad-

band amplifier (IC415), and passes through a low-pass filter.

The impedance is converted by an attenuator and the signal

is output to the RF unit (X57-606) as the first local oscillator

RXLO1.

In transmit mode, the signal is amplified by the broad-

band amplifier (IC416), and passes through a low-pass filter.

The impedance is converted by an attenuator and the signal

is output to the RF unit (X57-606) as the first local oscillator

TXLO1.

When the VHF is not operating, Q436 is turned OFF with

a signal from the serial-parallel IC (IC404) and VHF LO1 VCO

(Q433) stops operation.

430MHz LO1

When the UHF band is operating in the main band, the

UHF REF VCO (Q431) generates 378.105 to 418.105MHz

(K), 388.105 to 398.105MHz (E) in receive mode and

378.205 and 418.205MHz (K), 388.205 to 398.205MHz (E).

(See Table 3, Frequency Configuration.)

The output signal (8.328 to 8.475MHz (K), 8.344 to

8.469MHz (E)) from the DDS (IC407) passes through a ce-

ramic filter (CF400), is input to pin 8 of the PLL IC (IC412) for

UHF and divided into 1/16 in IC412 to produce comparison

frequency fø of 520 to 530 kHz.

The output signal from the VCO (Q431) goes to pin 6 of

IC412 and its frequency is divided into 1/N in IC412, com-

pared with comparison frequency fø by a phase comparator,

and is locked.

The DDS (IC407) sweeps output frequency (8.328 to

8.475MHz (K), 8.344 to 8.469MHz (E)) in 10Hz steps by

equation fDDS STEP (Hz) = 10*R/N and in 1Hz steps by equa-

tion fDDS STEP (Hz) = 1*R/N, the LO1 covers the frequencies

of 378.105 to 418.105MHz (K), 388.105 to 398.105MHz (E)

in receive mode and 378.205 to 418.205MHz (K), 388.205 to

398.205MHz (E) in transmit mode in 10Hz or 1Hz steps.

The PLL output signal is changed by the switching circuit

of Q471 (receive) and Q472 (transmit) so that the output

amplifier and low-pass filter correspond to UHF band trans-

mission and reception.

In receive mode, the signal is amplified by the broad-

band amplifier (IC415), and passes through a low-pass filter.

The impedance is converted by an attenuator and the signal

is output to the RF unit (X57-606) as the local oscillator sig-

nal RXLO1.

In transmit mode, the signal is amplified by the broad-

band amplifier (IC416), and passes through a low-pass filter.

The impedance is converted by an attenuator and the signal

is output to the RF unit (X57-606) as the local oscillator sig-

nal TXLO1.

When the UHF is not operating, Q434 is turned OFF with

a signal from the serial-parallel IC (IC404) and UHF VCO

(Q431) stops operation.

Table 2

Main VHF band frequency configuration

CIRCUIT DESCRIPTION