Component Description - Kenwood KDC-CPS89 Service Manual

GSUB-CIRCUIT UNIT (X13-9930-00)
Ref.No. Component Name
IC1 UPD78058GCB82T
IC2 PST9137NR
Q1 DTC124EUA
Q3 DTB123YK
Q2 DTC124EUA
Q4 DTB123YK
Q5 2SC4081
Q6 2SC4081
Q7 DTC124EUA
Q8 DTC124EUA
Q9 2SB1202
Q10 2SC4081
GCD PLAYER UNIT (X32-5160-00)
Ref.No. Component Name
IC1 UPD63711AGC
IC2 NJM4580MD
IC3 NJM5532MD
IC4 KIA78L05F
IC5 LA6576

COMPONENT DESCRIPTION

Application/Function
System MI-COM. CH1/CH2/AUX control
Reset IC When BU 5V voltage is less than 3.7V, IC outputs "Lo".
While CD-CH1's outputs are selected, Q1's base goes "Lo", and Q3 is
Relay drive turned off.
(CH1/CH2 switching) While CD-CH2's outputs are selected, Q1's base goes "Hi", and Q3 is
turned on.
While CD-CH's outputs are selected, Q2's base goes "Lo", and Q4 is
Relay drive
turned off.
(CH/AUX switching)
While AUX inputs are selected, Q2's base goes "Hi", and Q4 is turned on.
CH CON2 SW While CH CON2 mode is selcted, a base goes "Hi", and Q5 is turned on.
While CH CON or CH CON2 mode is selcted, a base goes "Hi", and Q6 is
CH CON SW
turned on.
While BACKUP is applied, a base goes "Hi", and Q7 is turned on.
BU DETECTION SW When momentary power down has detected, a base goes "Lo", and Q7 is
turned off.
Reset SW When System Reset has activated, a base goes "Hi", and Q8 is turned on.
While BACKUP is applied, AVR outputs +5V.
BU 5V AVR
Q9 and Q10 are inverted Darlington connection
Application/Function
RF amplifier built in digital servo and data processor IC. Focusing, tracking,
sled and spindle servo processing. Detection of dropout, anti-shock, track
crossing and off-track conditions.
Servo IC
Automatic adjustment (focusing, tracking, gain, offset and balance)
operations. Digital signal processing (DSP, PLL, sub-codes, CD-TEXT
decode, CIRC error correction, audio data interpolaration) operations.
VREF amp. Operational reference voltage for low pass filter
Low pass filter Differential amplifier
+5V AVR Analogue output circuit power supply for D/A converter
Focusing coil, tracking coil, spindle motor and sled motor driver.
VO1-VO4 and VOL outputs ON/OFF function
While MUTE1 goes "Hi", VO1 outputs are turned on.
While MUTE2 goes "Hi", VO2-VO4 and VOL outputs are turned on.
VIN1 amplifier function (input selection and VREF selection)
Motor driver 1. Input selection
While VIN SW terminal goes "Lo", IC pin 15, 16 and 17 inputs are selected.
While VIN SW terminal goes "Hi", IC pin 15, 18 and 19 inputs are selected.
2. VREF selection
While VIN SW terminal goes "Lo", internal VREF (2.5V typical) is selected.
While VIN SW terminal goes "Hi", external VREF (IC pin 30 input) is selected.
KDC-CX87/CPS87
Operation/Condition/Compatibility
Operation/Condition/Compatibility
3