Control Unit - Kenwood TS-990S Service Manual

TS-990S
Ref. No. Use/Function
D280~288 Protection
Reverse voltage
D360
prevention
CONTROL UNIT (X53-452X-XX)
Ref. No. Use/Function
1.2V switching
IC1
regulator
3.3V linear regu-
IC2
lator
IC30 Multiplexer
IC31~34 Latch IC
IC35 Multiplexer
IC36~39 Latch IC
Level converter
IC40
(5V3.3V)
Level converter
IC41
(3.3V5V)
IC42,43 Latch IC
IC44 Reset IC
Level converter
IC45
(5V3.3V)
IC46 MCU
IC47 EEPROM
IC48 Buffer
IC49 Real time clock
IC380 MCU
IC381 DSP
IC382 A/D converter
IC384,387 OP amplifi er
IC385 OP amplifi er
IC386 A/D converter
IC388,389 Latch IC
IC390 Flash memory
Q380 Switching
Q381 Switching
D1 Switching
Reverse current
D30
prevention
Reverse current
D31
prevention
Reverse current
D32
prevention
Reverse current
D380
prevention
50
COMPONENTS DESCRIPTION
Operation/Condition/Compatibility
Surge protection
Surge protection
Operation/Condition/Compatibility
Power supply for 1.2V
(Scope DSP internal (core) sup-
ply)
Power supply for 3.3V
(Main MCU power supply)
For PCB version
Extension port of main MCU
For type and PCB version
Extension port of main MCU
For external antenna tuner signal
For external antenna tuner signal
Extension port of main MCU
System reset
USB connection detection
Main MCU
EEPROM for backup
For serial clock and data
Real time clock
Scope DSP-Sub MCU
Scope DSP
A/D converter for band scope IF
signal
Active fi lter for band scope IF sig-
nal
Reference signal for OP amplifi er
A/D converter for audio scope
signal (Main RX/ Sub RX)
Address decoder for scope DSP
Program for scope DSP
3.3V switch
3.3V switch
Catch diode for 1.2V switching
regulator
For standby switch signal (SS)
For KEY jack judgement signal
(KYSR)
For real time clock IC power
For reduced voltage detection
(BKC)
DSP UNIT (X53-4530-00)
Ref. No. Use/Function
1.2V switching
IC1
regulator
IC50 Phone amplifi er
Audio power
IC51
amplifi er
Audio power
IC52
amplifi er
IC101 MCU
IC200,
Latch
201
IC202 DSP
IC203 Flash memory
IC300 DSP
IC301 Flash memory
IC302 Buffer
IC322 Inverter
IC380 Flip-fl op
IC381 Buffer
IC382 Buffer
IC383 Buffer
IC385 D/A converter
IC386 D/A converter
IC387 D/A converter
IC388 D/A converter
IC389 A/D converter
IC390 D/A converter
IC391 D/A converter
IC392 A/D converter
IC397 D/A converter
IC398 A/D converter
IC399 NAND gate
IC650 OP amplifi er
IC651 OP amplifi er
IC652 OP amplifi er
IC653 OP amplifi er
IC654 OP amplifi er
Operation/Condition/Compatibility
Power supply for 1.2V
(DSP internal (core) Supply)
Phone output
SP1 (internal SP)/ Ext. SP1
Ext. SP2
DSP-Sub MCU
Address decoder for TXMRX-
DSP
TX/Main RX DSP
Program for TXMRX-DSP
Sub RX DSP
Program for SRX-DSP
Extension output for SRX-DSP
X'tal buffer
A frequency divider for SCLK/
LRCK
Buffer for SCLK48K
Buffer for LRCK48K
Buffer for MCLK48K
D/A converter for BEEP and
MSCPI signal
D/A converter for MUANO and
SUANO signal
D/A converter for MRECI and
SRECI signal
D/A converter for SAGCV and
SSCPI signal
A/D converter for MRECO and
SRECO signal
D/A converter for SP1 and SP2
signal
D/A converter for MANO and
SANO signal
A/D converter for SRIF/SFMD
and ANI/UANI signal
D/A converter for TIF/FMOD and
MAGCV signal
A/D converter for MRIF/MFMD
and MIC signal
For SCLK96K
Active fi lter for SP1 and SP2
signal
Active fi lter for MANO and SANO
signal
Active fi lter for BEEP signal and
reference voltage of OP amplifi er
Active fi lter for MUANO signal
Active fi lter for SUANO signal