KDC-7027/7027Y
4
SWITCH UNIT (X16-2560-11)
Ref No.
Application / Functions
Operation / Condition / Compatibility
Q1
DSI LED SW
DSI LED blinks when Q1 base level goes H/L
Q2
KEY Illumination SW (Green)
KEY Illumination SW "ON" when the Q2 base level goes H
Q3
KEY Illumination SW (Red)
KEY Illumination SW "ON" when the Q3 base level goes H
Q4
KEY Illumination SW (Blue)
KEY Illumination SW "ON" when the Q4 base level goes H
CD PLAYER UNIT (X32-5550-00)
Ref No.
Application / Functions
Operation / Condition / Compatibility
Generation of RF signal based on the signals from the APC circuit and pickup, and
IC1
RF amplifier adapted for CD-RW
generation of servo error (focusing error and tracking error) signals. Detection of dropout,
anti-shock, track crossing and off-track conditions, included gain control function during
CD-RW.
Focusing, tracking, sled and spindle servo processing. Automatic adjustment (focusing,
IC2
CD signal processor built-in MI-COM
tracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL, sub-
codes, CIRC error correction, audio data Interpol ration) operations, and Microcomputer
function.
IC4
4CH BTL driver
Focus, Tracking coil, Feed and Spindle motor driver IC
IC6
LPF
Audio active LPF
Q1
APC
LD power control
Q2
Q3 SW
When P ON signal gose "H", Q2 is ON
Q3
A.8V SW
When P ON signal gose "H" (Q2 is ON), Q3 is ON
Q4
D.5V SW
When P ON signal gose "L" (Q5 is ON), Q4 is ON
Q5
Q4 SW (P-ON)
When P ON signal gose "H", Q5 is ON
ELECTRIC UNIT (X34-3042-72)
Ref No.
Application / Functions
Operation / Condition / Compatibility
IC1
System control IC
System control microprocessor
IC2
E-VOL & tuner IC
E-VOL. FM/AM tuner & stereo decoder
IC3
Power supply IC
For A8V AVR
IC4
Audio power IC
Audio power amplifier
IC7
Reset IC
When BU5V line voltage is less than 3.5V, this IC output line is "L"
IC8
Muting logic IC
Control for MUTE, P-ANT & RESET muting
IC12
RDS decoder
Decode for RDS signal
IC13,14
Motor driver
Control for Panel mechanism motor
Q1,2
BU 5V AVR
While BU is applied when BU5V regulator output is +5V
Q3
SW5V AVR
When Q3base level goes L, SW5V regulator output is +5V
Q4,5
SW14V AVR
When Q5 base level goes H, SW14V regulator output is +14V
Q6~8
Audio 8V AVR
When Q6 base level goes H, A8V regulator output is +8.4V
Q9,34
Servo +B AVR
When Q34 base level goes H, S+B regulator output is +7.4V
Q11~14
Illumination +B AVR
When Q11 base level goes H, AVR output is +10.5V
Q25,26
P-CON SW
When Q26 base level goes H, P-CPN SW output is +14V
Q27,28
P-CON protection
Protect Q27 by turning on when P-CON output is grounded
Q29
Buffer
EX amp control buffer
Q30
Small lamp det. SW
When Q30 base level goes H, Q30 turned ON
COMPONENTS DESCRIPTION
