Component Description - Kenwood KDC-C469 Service Manual

KDC-C469/Y/FM/FMA
KDC-C669/Y
QQ
3 7 63 1515 0
● CD PLAYER UNIT (X32-5470-0x)
Ref. No. Component Name
IC1 UPD63711AGC
IC4 KIA78L05F
IC5 LA6576
IC7 UPD784214GC098
TE
L 13942296513
IC8 BR24C02F-W
IC9 S-80830CNNP
IC11 LC3564BT-70
Q1 MCH6101
Q4 DTA124EK
Q5 DTA124EUA
Q6 DTC343TK
Q7 DTC343TK
Q8 DTA124EK
Q9 2SB1202
Q10 2SB1295
Q11 DTC124EK
Q13 DTC124EUA
Q14 DTA143EUA
Q16 2SC4081
Q17 DTA143EK
Q18 DTC124EUA
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Q19 DTC124EUA
Q20 DTC124EK
.
Q21 2SB1202
Q22 2SC4081
4

COMPONENT DESCRIPTION

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.
+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.
Mechanism MI-COM. Mechanism and servo control.
EEPROM LPS data back-up memory.
Reset IC When BU 5V voltage is less than 3.0V, IC outputs "Lo".
S RAM CD-TEXT data memory.
APC Laser diode auto power control.
0 bit mute (L CH.) When 0 bit mute is activated, an emitter goes "Hi", and Q4 outputs "Hi".
0 bit mute (R CH.) When 0 bit mute is activated, an emitter goes "Hi", and Q5 outputs "Hi".
When 0 bit mute or A mute drive is activated, a base goes "Hi", and L channel audio
Mute SW (L CH.)
signal is muted.
When 0 bit mute or A mute drive is activated, a base goes "Hi", and R channel audio
Mute SW (R CH.)
signal is muted.
When audio mute of IC7 is activated, a base goes "Lo", and audio mute drive signal
A mute drive
is outputted.
Servo 5V AVR Q9 is combined with IC5's pin 26 and 27 , and works as a driver of AVR.
P-ON 5V SW While base goes "Lo", P-ON 5V is supplied to the microprocessor peripheral circuits.
Reset SW When System Reset has activated, a base goes "Hi", and Q11 is turned on.
CH CON SW While CH CON or CH-CON2 mode is selected, a base goes "Hi", and Q13 is turned on.
CH MUTE SW When MUTE REQUEST to H/U is outputted, a base goes "Lo", and Q14 is turned on.
SRV 8V AVR Q16 is combined with Q15 (X92-), and works as a pre-driver of AVR.
SRV 8V AVR SW When Q18's base goes "Hi", Q17 is turned on, and SVR 8V AVR is working.
When a base goes "Hi", Q19 is turned on, and SVR 8V AVR is outputting +7V.
7/9V SW
When a base goes "Lo", Q19 is turned off, and SVR 8V AVR is outputting +8.5V.
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While BACKUP is applied, a base goes "Hi", and Q20 is turned on.
BU DETECTION SW
When momentary power down has detected, a base goes "Lo", and Q20 is turned off.
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While BACKUP is applied, AVR outputs +5V.
BU 5V AVR
Q21 and Q22 are inverted Darlington connection.
2 9
8
Operation/Condition/Compatibility
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3 6 7 1 3 1 5
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