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...

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...

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...

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...

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...

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...

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...

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...

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...

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...