Component Description - Kenwood KD-C517FM Service Manual

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3 7 63 1515 0
GCD PLAYER UNIT (X32-5090-0X)
Ref.No. Component Name
IC1 UPD63711AGC
IC4 KIA78L05F
IC5 LA6576
IC7 UPD784214GC091
BR24C02F-W
or CAT24WC02JI
IC8 or M24C02WMN6T
TE
L 13942296513
or S-24C02BFJA
or 24LC02BT-ISN
IC9 S-80830ANNP
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
Q19 DTC124EUA
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Q20 DTC124EK
Q21 2SB1202
Q22 2SC4081
.
Q30 DTC114YUA
Q31 DTC124EUA

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.
2. VREF selection.
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
Mute SW (L CH.)
channel audio signal is muted.
When 0 bit mute or A mute drive is activated, a base goes "Hi", and R
Mute SW (R CH.)
channel audio signal is muted.
When audio mute of IC7 is activated, a base goes "Lo", and audio mute
A mute drive
drive signal 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.
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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y
While BACKUP is applied, AVR outputs +5V.
BU 5V AVR
Q21 and Q22 are inverted Darlington connection.
i
When an eccentric disc is detected, Q30 is turned on, and a preceding
Eccentric disc SW
beam is made to be delayed.
While spindle servo or disc loading/eject mode is selected, a base goes
VIN SW
"Hi", and Q31 is turned on.
KDC-C517FM, C717/Y
2 9
8
Operation/Condition/Compatibility
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.
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.
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