Kenwood CKDC-395, Service Manual

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CKDC-395/395A/495
COMPONENTS DESCRIPTION
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ELECTRIC UNIT (X34-3920-1x)
Ref. No. Application / Function Operation / Condition
IC1 SYSTEM
µ
-COM System control.
IC3 POWER SUPPLY DC5Vx2, 7.9Vx1, 8.1Vx1, 10.3V, P.CON, P-ANT output.
IC4 POWER IC Audio signal amplifier.
IC6 MUTE LOGIC Mute control.
IC7 RDS DECODER For other models.
IC8 RESET “L” when detection voltage goes below 3.6V.
IC10 E-VOL & TUNER E-VOL, Tuner, Stereo decode.
IC11 E2PROM Saves and writes tuner adjustment data.
IC15 VFD REGULATOR 11.3V output voltage for LED and VFD.
Q51 SERGE DET “ON” when the base goes “H”.
Q52 BU DET “ON” when the base goes “H”.
Q53 ACC DET “ON” when the base goes “H”.
Q71 SERVO+B CONTROL SW “ON” when the base goes “H”.
Q72,73 SERVO+B AVR Output voltage level : 7.5V.
Q74 IC3 CONTROL SW “ON” when the base goes “H” (Output voltage : 10.3V).
Q151 PANEL 5V SW “ON” when the base goes “L”.
Q155 DSI ILLUMI SW “ON” when the base goes “L”.
Q252 IC4 STBY SW “ON” when the base goes “L”.
Q330 Q351, 352 MUTE DRIVER “ON” when the base goes “L”.
Q351 Lch PRE MUTE SW Pre-output is muted when the base goes “H”.
Q352 Rch PRE MUTE SW Pre-output is muted when the base goes “H”.
Q501 AM RF AMP Adjusts for AM-RF gain.
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CD PLAYER UNIT (X32-5750-00)
Ref. No. Application / Function Operation / Condition
Generation of RF signal based on the signals from the APC circuit and pickup, and
IC1
RF AMPLIFIER responding generation of servo error (focusing error and tracking error) signals.
to CD-RW 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.
IC2
CD SIGNAL PROCESSOR Automatic adjustment (focusing, tracking, gain, offset and balance) operations.
built-in
µ
-COM Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data
interpolation processing) operations, and microcomputer function.
IC3 4ch BTL DRIVER
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
IC4 L.P.F. (LOW PASS FILTER) 2nd low pass filter for audio signals.
Q1 APC (AUTOMATIC POWER CONTROL) LD power control.
Q2 D5V SW “ON” When P. ON signal goes “L”.
Q3 Q4 SW “ON” When P. ON signal goes “L” (SW+5V is ON).
Q4 8V SW “ON” When P. ON signal goes “L” (Q3 is ON).
Q5, 6 CURRENT AMP Current driver.
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