Kenwood KDC-MP925 Service Manual page 4

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