Kenwood C929, Руководство по обслуживанию

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C929
3
COMPONENT DESCRIPTION
REF.
No.
FUNCTION OPERATION
IC1
RE amplifier, Focus/Tracking error amplifier, APC circuit, Reference
RF ERROR AMPLIFIER / SERVO amplifier, Defect RFOK mirror circuit, EFM comparator, Vibration
DIGITAL SIGNAL PROCESSOR detector, Digital servo data processor, Digital loop filter, 8 times over
sampling filter, D/A converter.
IC2 VOLTAGE FOLLOWER Audio reference voltage supply.
IC3 ACTIVE FILTER 2nd low pass filter.
IC4 AVR Audio 5V power supply.
IC5 MOTOR DRIVER Focus tracking actuator, Sled/Spindle MD deck up/down motor driver.
IC7 SYSTEM µ-COM Servo control / Mechanism control / Multiple purposes interface.
IC8 MEMORY Mechanism up/down position offset servo initial data memory.
IC9 µ-COM RESET. Resets u-com.
IC10 DRIVER DAC.
IC11 TEXT DATA MEMORY Memorises data from text decoder through u-com.
IC14 IE-BUS DRIVER Bus driver.
Q1 LASER CONTROLLER "ON" when IC13's APC goes on.
Q4 Q1 DRIVER 0 bit mute goes on when "H" level signal is putout from LZ port of IC6.
Q5 Q2 DRIVER 0 bit mute goes on when "H" level signal is putout from RZ port of IC6.
Q6,7 AUDIO MUTE Mute goes on when "L" level signal output from A. MUTE port of IC7.
Q8 Q1&2 DRIVER Mute goes on when "L" level signal is output from A. MUTE Port of IC7.
Q9 CD SYSTEM 5V POWER SUPPLY Transistor with regulator inside the IC12.
Q10 P.ON SW SW5V turns on when "L" level signal is output from P.ON port of IC7.
Q11 RESET SW Resets u-com by "H" level reset control signal from the head unit.
Q12 CLOCK ON/OFF Clock goes off when "H" level signal is output from XOFF port of IC7.
Q13 SYSTEM-ON SW Works during the ACC and power on.
Q14 CH-MUTE SW
Audio mute output level goes on when "H" level signal is output
from AUDIO port of IC7.
Q15 SW +8 AVR
Q16 Q15 DRIVER Drives Q15.
Q17 AVR 8V SW Switches AVR 8V power supply.
Q18 Q11 DRIVER Drives Q11.
Q19 AVR 7V/8V SW "H" (7V) : Usual play mode. "L" (8V) : Elevator up/down.
Q20 B.U. VOLTAGE DOWN DETECTION
SW
Q21 B.U. +5V AVR
Q22 Q21 DRIVER Drives Q21.
Q23 Q24 DRIVER Audio turns on when "H" level signal is output from AUDIO port of IC7.
Q24 RELAY SW
Q25 Q1 (on X16-) DRIVER
Digital-out turns on when "H" level signal is output from DGCON port
of IC7.
Q31 MOTOR DRIVER REFERENCE
VOLTAGE SW
Q32 SUB BEAM F SIGNAL TIME
CONSTANT SW
"H" when time constant takes effect.
SUB-CIRCUIT UNIT (X16-1030-00)
REF.
No.
FUNCTION OPERATION
Q1 D-OUT (TRANSISTOR VCC SW)
Q2 D-OUT (TRANSMITTER DRIVER)
CD PLAYER UNIT (X32-4970-00)
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