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