Kenwood TS-590SG Service Manual page 21

Ref. No. Use / Function
IC308 OR gate IC Buffer for VBINT signal
IC309 EEPROM
Analog multiplex-
IC310 A/D port selection of MCU
er
Buffer with 3-state
IC311 Data control of DSP
output
Voltage conversion: 5V → 3.3V
IC312 Buffer
(for TTI and TSI signal)
Voltage conversion: 3.3V → 5V
IC313 Buffer
(for TTO and TSO signal)
IC314 Buffer Buffer for CLK signal
IC315 Reset IC BKC detection
IC316 OR gate IC Delay time control of FOE
IC317 OR gate IC Logic IC for IC311 control
IC501,502 Buffer Voltage conversion: 3.3V → 5V
IC504 5V AVR 5V voltage regulator
IC505 3.3V AVR 3.3V voltage regulator
IC601 DDS LO3 generator
Q1: I/O update
Q2: FM_TX
Q3: IFB
Q4: IFA
IC651 Shift register
Q5: BPF1
Q6: BPF2
Q7: BPF3
Q8: BPF4
IC801 PLL LO1 reference generator
IC802 1.8V AVR 1.8V voltage regulator
IC803 DDS LO1 generator
IC804 Amplifi er Wide band amplifi er
IC901 Level converter RS-232C level converter
IC902 OP amplifi er USB audio amplifi er
IC903 CODEC USB audio IC
IC904 AND gate USB audio IC control
IC905 USB hub
USB-UART
IC906
bridge
Power supply control of 3.3V
Q1~4 Switching
(ON when power is ON)
Q61 Ripple fi lter For audio amplifi er VCC
Q62 Switching Detection signal mute switch
FMOD and TIF signal ON/OFF
Q63,64 Switching
analog switch control (IC68)
Q65 Buffer Buffer amplifi er for ANO output
ANI and UAO signal ON/OFF
Q66,67 Switching
analog switch control (IC80)
Crystal oscillation Crystal oscillation circuit
Q501
circuit (15.6MHz)
Q502 Buffer 15.6MHz buffer
Frequency doubler
Q503 Doubler
(15.6MHz x 2 = 31.2MHz)
COMPONENTS DESCRIPTION
Operation / Condition / Compatibility Ref. No. Use / Function
Q504,505 Doubler
Q506 Amplifi er
Q601 Buffer
Q602 Buffer
Q651,652 Switching
Q653,654 Switching
Q655,656 Switching
Q657,658 Switching
Q659,660 Switching
Q661,662 Switching
Q663 Amplifi er
Q664 Switching
Q801 Buffer
Q802 Switching
Q803 Switching
Q804 Amplifi er
Q805 Filter
Q806 VCO
Q807 Amplifi er
Q808 Amplifi er
Q901,905 Switching
Q902,906 Switching
Q903,907 Switching
Q904,908 Switching
D1 Switching
D2 Switching
D3~6 Voltage shift
Reverse current
D7~9
prevention
D61 Poly-switch
Reverse current
D62
prevention
D101 Mute
D301 6.2V zener diode
Reverse current
D302
prevention
D304 Switching
D501 Switching
D651 Switching
D652 Doubler
D653 Switching
TS-590SG
Operation / Condition / Compatibility
Frequency doubler
(31.2MHz x 2 = 62.4MHz)
LO2 output amplifi er
DDS reference buffer
LO3 output buffer
BPF4 selection switch
IFB selection switch
BPF1 selection switch
IFA selection switch
BPF2 selection switch
BPF3 selection switch
LO1 output amplifi er
LO1 output LPF cutoff control
switch
PLL reference buffer
FM modulation switch
PLL LPF cutoff control switch
PLL F-in amplifi er
Ripple fi lter
VCO amplifi er
DDS reference amplifi er
RS-232C IC power supply control
switch
USB IC power supply control
switch
USB audio IC active signal switch
USB-UART bridge IC active Sig-
nal Switch
Catch diode for 3.3V switching
regulator
Catch diode for 8V switching
regulator
Temperature compensation
For MIC data
Current limit
For MIC supply (8V)
For AF mute
Voltage shift
For SS signal
LO2 output switch
IFA selection switch
DDS output frequency doubler
LO1 BPF3 selection switch
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