Components Description - Kenwood KDC-232MR Service Manual

ELECTRIC UNIT (X34-4160-12)
Ref. No. Application / Function
System µ-COM
IC1
IC3 Power Supply IC
IC4 Power IC
IC6 Mute logic IC
IC8 Reset IC
IC10 E-VOL & Tuner
IC11 E2PROM
IC15 Regulator IC
Q51 Serge Det.
Q52 B.U. Det.
Q53 ACC Det.
Q71 Control SW for SERVO+B
Q72 SERVO+B AVR
Q151 Panel 5V SW
Q155 DSI ILLUMI SW
Q252 STANDBY SW for IC4
Q330 Mute driver for Q351, Q352
Q351 Mute SW for Lch PRE OUT
Q352 Mute SW for Rch PRE OUT
Q501 AM RF Amplifier
SWITCH UNIT (X16-3500-11)
Ref. No. Application / Function
IC1 VFD DRIVER
Q21 PAN SW5V
CD PLAYER UNIT (X32-5750-00)
Ref. No. Application / Function
RF AMPLIFIER responding
IC1
to CD-RW
CD SIGNAL PROCESSOR
IC2
built-in µ-COM
IC3 4ch BTL DRIVER
IC4 L.P.F. (LOW PASS FILTER)
Q1 APC (AUTOMATIC POWER CONTROL) LD power control.
Q2 DIGITAL +5V SW

COMPONENTS DESCRIPTION

System controller.
DC5Vx2, 7.9Vx1, 8.1Vx1, 10.2Vx1, P-CON, P-ANT output.
Signal amplifier.
Controls for mute action.
"L" : detection voltage below 3.6V.
E-VOL, Tuner, Stereo decoder.
Saves & Loads for tuner adjustment data.
Outputs 11.3V for LED and VFD.
ON when the base goes "Hi".
ON when the base goes "Hi" during BU applied.
ON when the base goes "Hi" during ACC applied.
ON when the base goes "Hi".
Outputs voltage 7.5V.
ON when the base goes "Lo".
ON when the base goes "Lo".
ON when the base goes "Lo".
ON when the base goes "Lo".
Audio pre-output is muted when the base goes "Hi".
Audio pre-output is muted when the base goes "Hi".
Adjusts for Gain.
"ON" when the base goes "H".
Generation of RF signal based on the signals from the APC circuit and pickup, 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.
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.
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
2nd low pass filter for audio signals.
"ON" When P. ON signal goes "L".
KDC-232MR
Operation / Condition / Compatibility
Operation / Condition
Operation / Condition
3