Kenwood KRK-14H Service Manual page 8

2.3 COMPONENTS DESCRIPTION
2.3.1 Interface unit (XC3-0080-20) (KRK-14H)
Ref.No Part Name
IC1 IC
IC2 IC
IC3 IC
IC4 IC
IC5 IC
IC6 IC
IC7 IC
IC8 IC
IC9~12 IC
IC13 IC
IC14 IC
IC15 IC
IC16 IC
IC17 IC
IC18 IC
IC19 IC
IC20 IC
IC21, 22 IC
IC23 IC
IC25 IC
IC29 IC
Q1 FET
Q2 FET
Q3 FET
Q4, 5 Transistor
Q6 Transistor
Q7~10 FET
D1 Varistor
D2, 3 Varistor
D4, 5 Diode
D6 Diode
D7 Diode
D8, 9 Zener diode
D10 Diode
D11, 12 Diode
D13 Diode
D15 Diode
1-8 (No.RA021<Rev.001>)
Description
DC/DC converter (53DC)
DC/DC converter (39DC)
Voltage regulator (33A)
DC/DC converter (18D)
Voltage regulator (33D)
Voltage regulator (50D)
DC SW (18D)
CAN transceiver IC
Analog SW (AF)
AF AMP
AF/DC AMP (AF/25ref)
AF AMP (RX AF)
MPU
Codec IC
DC/AF AMP (Vref/AF)
AF AMP
Analog SW (AF)
Logic control
SDRAM
Audio power AMP (class D)
Flash memory
DC SW (Open drain)
DC SW
DC SW (Open drain)
DC SW
MIC AGC
DC SW
Over current prevention
ESD protection
Reverse current prevention
DC/DC converter (53DC)
DC/DC converter (39DC)
Over voltage protection
Reverse current prevention
MIC AGC detection
Reverse current prevention
Reverse current prevention
2.3.2 Interface unit (XC3-0090-20) (KRK-15B)
Ref.No Part Name
IC1 IC
IC2 IC
IC3 IC
IC4, 5 IC
IC6 IC
IC7 IC
IC8 IC
IC9, 10 IC
2.4 TERMINAL FUNCTION
2.4.1 Interface unit (XC3-0080-20) (KRK-14H)
Pin No. Name I/O
1 /PRST I Reset signal
2 /PSW O Detection signal output of power
3 MICA+ O MIC signal output plus_A
4 MICA- O MIC signal output minus_A
5 MICB+ O MIC signal output plus_B
6 MICB- O MIC signal output minus_B
7 GND - Ground
8 NC - No connection
9 SB I Switched power supply
10 NC(IGN) - No connection (Ignition sense
11 AFiA+ I AF signal input plus_A
12 AFiA- I AF signal input minus_A
13 AFiB+ I AF signal input plus_B
14 AFiB- I AF signal input minus_B
15 CAN+ I/O CAN data plus
16 CAN- I/O CAN data minus
1 GND - Ground
2 NC - No connection
3 NC - No connection
4 Ao2 O AUX output 2
5 Ao1 O AUX output 1
6 Ai2 I AUX input 2
7 Ai1 I AUX input 1
8 AUX_ME - AUX MIC ground
9 AUX_MIC I AUX MIC signal input
10 GND - Ground
11 SB O Switched power supply
12 IGN I Ignition sense input
13 GND - Ground
Description
AF AMP
CAN transceiver IC
Voltage regulator (33A)
Analog SW (AF)
DC AMP (Vref)
I/O expander
AF AMP
Analog SW (AF)
Function
CN1
switch
output)
CN2