Kenwood TS-2000 Service Manual page 25

Ref. No. Use / Function
D401,451 Surge absorption
D501,551 Surge absorption
CONTROL UNIT (X53-391X-XX)
Ref. No. Use / Function
Q1 Switching
Q2 Switching
Q3 Switching
Q4 Switching
Q5 Switching
Q9,10 Switching
Q13 Buffer amplifier
Q14 Buffer amplifier
Q15,16 Amplifier
Q17 Switching
Q18 Switching
Q19,20 Switching
Q501 Switching
IC1 Reset IC
IC2 AVR
IC3 AVR
IC4 3.3V AVR for DSP
IC5,6 Analog switch
IC7 EEPROM
IC8 Main microcomputer Primary main unit operation
IC9 Conversion between
5V and 3V
IC10,11 Conversion from
5V to 3V
IC12 DTMF decoder IC
IC13~18 Input/output port
logic
IC19,20 Input port
IC21~25 Output port
IC26 TNC microcomputer
IC27 OP amplifier
IC28 TNC logic circuit
IC29 OP amplifier
DESCRIPTION OF COMPONENTS
Operation / Condition
Relay (K401/K402, K451/K452)
Relay (K501/K502, K551/K552)
Operation / Condition
TT signal output control of external AT
TT signal input control of external AT
TS signal output control of external AT
TS signal input control of external AT
Power on at L level
9600 bps RX signal
1200 bps RX signal
Waveform shaping of TNC TX signal
Backup processing control of panel
microcomputer
RS-232C related power source
(X57-605 A/9)
For main microcomputer
Digital system 5V generation
5V constantly on
3.3V
Main microcomputer ADC input
changeover
For storage of various set values
Two-way conversion
Main microcomputer and DSP data
conversion
For DTMF decoding
Logic of latch IC used as input/
output port
Used as input port for main micro-
computer
Used as output port for main micro-
computer
Dedicated TNC microcomputer
A/2 : 1200 bps RX AF amplifier
B/2 : 9600 bps RX AF amplifier
TNC logic
A/2 : 1200 bps RX AF amplifier
B/2 : 9600 bps RX AF amplifier
Ref. No. Use / Function
IC30 Comparator
IC31 AND
IC32,33 Reset IC
IC501 AVR
IC502,503 1.8V AVR for DSP
IC504 Flash ROM for DSP2
IC505,506 For DSP port output
IC507 Input/output port
logic
IC508 Flash ROM for DSP1
IC509 Input/output port
logic
IC510 Input/output port
logic
IC511 Input/output port
logic
IC512 For DSP port input
IC513 Input/output port
logic
IC514 For DSP port input
IC515 DSP
IC516 DSP
IC517 Analog AGC buffer
IC518 CODEC (24 bit)
IC519,520 For CODEC
clock division
IC521 For CODEC
clock division
IC522,523 CODEC (16 bit)
IC524~529 Buffer for analog
signal input/output
IC530 Serial/parallel
IC531~534 Analog switch
IC535 Buffer for analog
signal input/output
D5,6 Reverse current
prevention
D11,12 Reverse current
prevention
D13 Reference voltage
source
D14~17 Reverse current
prevention
D501~504 Reverse current
prevention
TS-2000/X
Operation / Condition
Waveform shaping of modem TX signal
Sends DSP1 and DSP2 WAIT
signal to CPU through AND circuit
3V within control
1.8V
For program and coefficient storage
Used as output port (AGC output)
Logic of latch IC used as input/
output port
For program and coefficient storage
Logic of latch IC used as input/
output port
Logic of latch IC used as input/
output port
Used as input port
Logic of latch IC used as input/
output port
Used as input port
For IF processing
For AF processing
Analog AGC voltage buffer
RIF input, TIF output
Operation at 12.288MHz frequency
Microphone input, AF output
Connection to CODEC input/output
For microphone input changeover
For input/output changeover
Connection to CODEC input/output
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