KDC-MP925/W8027
4
Ref No.
Application / Functions
Operation / Condition / Compatibility
IC9
AVR
3.3V AVR (IC2 DAC part)
Q1,4
Level shift FET
Level shift (3.3V - 5.0V)
Q3,5
Level shift TR
Level shift (3.3V - 5.0V)
Q6
Level shift TR
Level shift (3.3V - 5.0V)
Q7
Level shift TR
Level shift (3.3V - 5.0V)
Q8
APC
Auto power control
Q9,10
Switching TR
Sub beam delay control switch
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ELECTRIC UNIT (X34-3030-10, X34-3032-71)
Ref No.
Application / Functions
Operation / Condition / Compatibility
IC1
System control IC
System control microprocessor
IC2
E-VOL & tuner IC
E-VOL. FM/AM tuner & stereo decoder
IC3
Power supply IC
For A8V AVR
IC4
Audio power IC
Audio power amplifier
IC5
System IC
For System E’s control
IC6
Audio control IC
For WOW/FOCUS control
IC7
Power supply IC
-9V AVR (For 4.5V Pre-out)
IC8
Reset IC
When BU5V line voltage is less than 3.5V, this IC output line is “L”
IC9
Muting logic IC
Control for MUTE, P-ANT & RESET muting
IC10
Buffer IC
For spectrum analyzer
IC11~13
OP AMP
For 4.5V Pre-out
IC14
RDS decoder
Decode for RDS signal
IC15,16
Motor driver
Control for Panel mechanism motor
IC18
P-CON IC
Power control IC
IC19
Power supply IC
Switching regulator IC for CD4.7V
IC20
Analog SW
Control for WOW/FOCUS IC (IC4)
Q1,2
BU 5V AVR
While BU is applied when BU5V regulator output is +5V
Q3,601
SW5V AVR
When Q601base level goes H, SW5V regulator output is +5V
Q4,5
SW14V AVR
When Q5 base level goes H, SW14V regulator output is +14V
Q6~8
Audio 8V AVR
When Q6 base level goes H, A8V regulator output is +8.3V
Q9,602
Servo +B AVR
When Q602 base level goes H, S+B regulator output is +7.5V
Q11~14
Illumination & DC/DC +B AVR
When Q11 base level goes H, AVR output is +9.2V
Q15,16
Audio 10.5V AVR
When Q16 base level goes H, AVR output is +10.5V
Q17~19
Pre Amp & -9V AVR
Q18,19 work as differential amplifier, Q17 wark as driver and -9.1V is supplied to
OP AMP for Pre-out
Q20~22
Pre Amp & +9V AVR
Q20,22 work as differential amplifier, Q21 wark as driver and +9.4V is supplied to
OP AMP for Pre-out
Q23,24
P-ANT SW
When Q23 base level goes H, P-ANT SW output is +14V
Q25
Buffer
EX amp control buffer
Q26
Small lamp det. SW
When Q26 base level goes H, Q26 turned ON
COMPONENTS DESCRIPTION