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Component Description; Operation; Te L 13942296513 - Kenwood C929 Service Manual

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3 7 63 1515 0
CD PLAYER UNIT (X32-4970-00)
REF.
No.
RF ERROR AMPLIFIER / SERVO
IC1
DIGITAL SIGNAL PROCESSOR
IC2
VOLTAGE FOLLOWER
IC3
ACTIVE FILTER
IC4
AVR
IC5
MOTOR DRIVER
IC7
SYSTEM µ-COM
IC8
MEMORY
IC9
µ-COM RESET.
IC10
DRIVER
IC11
TEXT DATA MEMORY
IC14
IE-BUS DRIVER
Q1
LASER CONTROLLER
Q4
Q1 DRIVER
Q5
Q2 DRIVER
Q6,7
AUDIO MUTE
Q8
Q1&2 DRIVER
Q9
CD SYSTEM 5V POWER SUPPLY
Q10
P.ON SW
Q11
RESET SW
TE
L 13942296513
Q12
CLOCK ON/OFF
Q13
SYSTEM-ON SW
Q14
CH-MUTE SW
Q15
SW +8 AVR
Q16
Q15 DRIVER
Q17
AVR 8V SW
Q18
Q11 DRIVER
Q19
AVR 7V/8V SW
Q20
B.U. VOLTAGE DOWN DETECTION
SW
Q21
B.U. +5V AVR
Q22
Q21 DRIVER
Q23
Q24 DRIVER
Q24
RELAY SW
Q25
Q1 (on X16-) DRIVER
Q31
MOTOR DRIVER REFERENCE
VOLTAGE SW
Q32
SUB BEAM F SIGNAL TIME
CONSTANT SW
SUB-CIRCUIT UNIT (X16-1030-00)
REF.
www
No.
Q1
D-OUT (TRANSISTOR VCC SW)
Q2
D-OUT (TRANSMITTER DRIVER)
.

COMPONENT DESCRIPTION

FUNCTION
FUNCTION
x
ao
u163
y
i
2 9
8
RE amplifier, Focus/Tracking error amplifier, APC circuit, Reference
amplifier, Defect RFOK mirror circuit, EFM comparator, Vibration
detector, Digital servo data processor, Digital loop filter, 8 times over
sampling filter, D/A converter.
Audio reference voltage supply.
2nd low pass filter.
Audio 5V power supply.
Focus tracking actuator, Sled/Spindle MD deck up/down motor driver.
Servo control / Mechanism control / Multiple purposes interface.
Mechanism up/down position offset servo initial data memory.
Resets u-com.
DAC.
Memorises data from text decoder through u-com.
Bus driver.
"ON" when IC13's APC goes on.
0 bit mute goes on when "H" level signal is putout from LZ port of IC6.
0 bit mute goes on when "H" level signal is putout from RZ port of IC6.
Mute goes on when "L" level signal output from A. MUTE port of IC7.
Mute goes on when "L" level signal is output from A. MUTE Port of IC7.
Transistor with regulator inside the IC12.
SW5V turns on when "L" level signal is output from P.ON port of IC7.
Resets u-com by "H" level reset control signal from the head unit.
Q Q
3
6 7
1 3
Clock goes off when "H" level signal is output from XOFF port of IC7.
Works during the ACC and power on.
Audio mute output level goes on when "H" level signal is output
from AUDIO port of IC7.
Drives Q15.
Switches AVR 8V power supply.
Drives Q11.
"H" (7V) : Usual play mode.
Drives Q21.
Audio turns on when "H" level signal is output from AUDIO port of IC7.
Digital-out turns on when "H" level signal is output from DGCON port
of IC7.
"H" when time constant takes effect.
.
9 4
2 8

OPERATION

1 5
0 5
8
2 9
9 4
"L" (8V) : Elevator up/down.
m
OPERATION
co
C929
9 9
2 8
9 9
3

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