Components Description; Low Pass Filter - Kenwood CKDC-395 Service Manual

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ELECTRIC UNIT (X34-3920-1x)
Ref. No. Application / Function
SYSTEM µ-COM
IC1
IC3 POWER SUPPLY
IC4 POWER IC
IC6 MUTE LOGIC
IC7 RDS DECODER
IC8 RESET
IC10 E-VOL & TUNER
IC11 E2PROM
IC15 VFD REGULATOR
Q51 SERGE DET
Q52 BU DET
Q53 ACC DET
Q71 SERVO+B CONTROL SW
Q72,73 SERVO+B AVR
Q74 IC3 CONTROL SW
Q151 PANEL 5V SW
Q155 DSI ILLUMI SW
Q252 IC4 STBY SW
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L 13942296513
Q330 Q351, 352 MUTE DRIVER
Q351 Lch PRE MUTE SW
Q352 Rch PRE MUTE SW
Q501 AM RF AMP
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)
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Q1 APC (AUTOMATIC POWER CONTROL)
Q2 DIGITAL +5V SW
Q3 Q4 SW
.
Q4 ANALOG +8V SW
Q5, 6 CURRENT AMP

COMPONENTS DESCRIPTION

System control.
DC5Vx2, 7.9Vx1, 8.1Vx1, 10.3V, P.CON, P-ANT output.
Audio signal amplifier.
Mute control.
For other models.
"L" when detection voltage goes below 3.6V.
E-VOL, Tuner, Stereo decode.
Saves and writes tuner adjustment data.
11.3V output voltage for LED and VFD.
"ON" when the base goes "H".
"ON" when the base goes "H".
"ON" when the base goes "H".
"ON" when the base goes "H".
Output voltage level : 7.5V.
"ON" when the base goes "H" (Output voltage : 10.3V).
"ON" when the base goes "L".
"ON" when the base goes "L".
"ON" when the base goes "L".
"ON" when the base goes "L".
Pre-output is muted when the base goes "H".
Pre-output is muted when the base goes "H".
Adjusts for AM-RF gain.
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.
LD power control.
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"ON" When P. ON signal goes "L".
"ON" When P. ON signal goes "L" (SW+5V is ON).
i
"ON" When P. ON signal goes "L" (Q3 is ON).
Current driver.
CKDC-395/395A/495
2 9
8
Operation / Condition
Q Q
3 6 7 1 3 1 5
Operation / Condition
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.
9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
9 9
3