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Ref. No.
Application / Function
Q300,302
4VPRE+B Protect
Q301
4VPRE+B AVR
Q500,501
AM+B
Q601,606
Pre-out Mute Driver
Q600,602,603,
Pre-out Mute SW
Q604,605,607
Q704,706
M-RST Converter
● SWITCH UNIT (X16-389x-xx)
Ref. No.
Application / Function
IC1
FL Driver
IC3
Remote Control Sensor
Q1
LED LED SW
Q2
GREEN LED SW
● CD PLAYER UNIT (X32-5980-02)
Ref. No.
Application / Function
CD Signal Processor & MECHA
IC1
µ-COM RF Amplifi er responding to
CD-RW
IC2
3.3V REG
IC6
4ch BTL Driver
Q3
5V-3.3V Level Shift
Q6
BU3.3V SW
Q7
APC (Auto Power Control)
Q8
Power Supply Control
Q9
Power Supply Control
D1,2
5V Force Voltage Prevention
D3
Laser Diode Protection
KDC-MP4036U/MP435U/X491/W4537UA/W4537UAY
/W4537UG/W4537UGY/W4737U/W4737UY
COMPONENTS DESCRIPTION
When 4VPRE+B is overcurrent, Q300 and Q302 turn Q301 off.
When Q300's base is 8V, 4VPRE+B outputs 7.4V.
When Q501's base goes Hi, AM+B is output.
When a base goes Lo, mute driver is turned on.
When a base goes Hi, pre-out is muted.
Converts 3.3V to 5V.
On when the base goes Hi. (RED LED lights)
On when the base goes Hi. (GREEN LED lights)
Focusing, tracking, sled and spindle servo processing.Automatic adjustment (focusing,
tracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL,
sub-codes, CIRC error correction, audio data interpolation processing) operations,
and microcomputer function. Generation of RF signal based on the signals from the
APC circuit and the laser pick-up, and generation of servo error (focusing error and
tracking error) signals. Detection of dropout, anti-shock, track crossing and off-tracking
conditions, included gain control function during CD-RW.
Supplies 3.3V to IC1 and the laser pick-up.
Focusing and tracking coil, sled and spindle motor driver, disc loading and eject operation.
Shifts 5V to 3.3V, or 3.3V to 5V.
Q6 is ON when Q8 or Q9 is ON.
Drives LD (Laser Diode).
Power Supply Control from MECHA µ-COM. Q6 is ON when pin 63 (P ON1) of IC1 is Hi.
Power Supply Control from system µ-COM. Q6 is ON when pin 125 (MSTOP) of IC1 is Hi.
5V Force Voltage Prevention from MECHA µ-COM side.
Prevents reverse bias which is applied to laser. Laser destruction prevention.
Operation / Condition / Compatibility
Operation / Condition / Compatibility
Operation / Condition / Compatibility
5
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