Description Of Components - Kenwood KDS-100 Service Manual

Display Unit (X54-3350-20)
Ref. No. Use/Function
Q1,2 Switching
Q3 Switching
Q4 Switching
Q5 Switching
Q6 Switching
Q7,8 DC amp
Q9 Switching
Q10 Switching
Q11,12 Switching
Q13~16 Switching
IC1 Reset IC
IC2 Real time clock
IC3 Level shift
IC4 Extended I/O
IC5 Multiplexer
IC6 CPU
IC7 Analog SW
IC8,9 Buffer
IC10 Level converter
IC11 Level converter
IC12 Memory
IC13 Memory
IC14 Amplifier
IC15 Amplifier
IC16 Gate IC
IC17 D/A converter
IC19 Clock demultiplier
IC20 A/D,D/A
IC21,22 Amplifier
IC23 DSP IC

DESCRIPTION OF COMPONENTS

Operation/Condition
Logic Inverter
Level converter RS232C→TTL
Level converter
Logic Inverter
LED switch
LCD backlight adjustment
LED switch, Keyboard backlight
AF amp power supply SW
Level converter 3V→5V
Reset backup
Time management
Level converter RS232C→TTL
Serial/parallel conversion
Serial port SW
16 bit
Serial/parallel conversion
Extended I/O
5V← →3V
5V→3V
5V S-RAM
3.3V Flash ROM
Output data
Input data
Logic inverter
For DSP
CODEC
Output data
Ref. No. Use/Function
IC24 Shift register
IC25 Shift register
IC26 Regulator
IC27,28 Regulator
IC30 Regulator
IC31 Regulator
IC32,33 Regulator
IC34 AF amp
IC35 Regulator
IC36 Regulator
IC37,38 Level converter
IC39 Gate IC
IC40 Analog SW
IC41 Buffer
D1 Over current
protection
D2 Zener diode
D3 Backward voltage
protection
D4,5 Reverse current
protection
D6~17 Surge absorption
D18 Level converter
D19~24 Surge absorption
D27 LED
D28~32 LED
D34~39 Surge absorption
D40 Reverse current
protection
KDS-100
Operation/Condition
LED, Audio amp SW
KEY Scan
1.8V
3.3V
5V (1A)
5V (150mA)
5V (15mA)
5V (1A)
8V (1A)
5V→3V
IC10 direction
Serial/parallel conversion
Reset signal
0.75A
Connection detector
TX/RX
KEY backlight
9