Kenwood KDC-C517FM, Service Manual

KDC-C517FM, C717/Y

3

Ref.No.

Component Name

Application/Function

Operation/Condition/Compatibility

RF amplifier built in digital servo and data processor IC. Focusing, tracking,
sled and spindle servo processing. Detection of dropout, anti-shock, track 

IC1

UPD63711AGC

Servo IC

crossing and off-track conditions.
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.

IC4

KIA78L05F

+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)

IC5

LA6576

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.

IC7

UPD784214GC091

Mechanism MI-COM. Mechanism and servo control

BR24C02F-W 
or CAT24WC02JI 

IC8

or M24C02WMN6T 

EEPROM

LPS data back-up memory

or S-24C02BFJA 
or 24LC02BT-ISN

IC9

S-80830ANNP

Reset IC

When BU 5V voltage is less than 3.0V, IC outputs "Lo".

IC11 LC3564BT-70

S RAM

CD-TEXT data memory

Q1

MCH6101

APC

Laser diode auto power control

Q4

DTA124EK

0 bit mute (L CH.)

When 0 bit mute is activated, an emitter goes "Hi", and Q4 outputs "Hi".

Q5

DTA124EUA

0 bit mute (R CH.)

When 0 bit mute is activated, an emitter goes "Hi", and Q5 outputs "Hi".

Q6

DTC343TK

Mute SW (L CH.)

When 0 bit mute or A mute drive is activated, a base goes "Hi", and L 
channel audio signal is muted.

Q7

DTC343TK

Mute SW (R CH.)

When 0 bit mute or A mute drive is activated, a base goes "Hi", and R 
channel audio signal is muted.

Q8

DTA124EK

A mute drive

When audio mute of IC7 is activated, a base goes "Lo", and audio mute 
drive signal is outputted.

Q9

2SB1202

Servo 5V AVR

Q9 is combined with IC5's pin 26 and 27 , and works as a driver of AVR.

Q10

2SB1295

P-ON 5V SW

While base goes "Lo", P-ON 5V is supplied to the microprocessor peripheral circuits.

Q11

DTC124EK

Reset SW

When System Reset has activated, a base goes "Hi", and Q11 is turned on.

Q13

DTC124EUA

CH CON SW

While CH CON or CH-CON2 mode is selected, a base goes "Hi", and Q13 is turned on.

Q14

DTA143EUA

CH MUTE SW

When MUTE REQUEST to H/U is outputted, a base goes "Lo", and Q14 is turned on.

Q16

2SC4081

SRV 8V AVR

Q16 is combined with Q15(X92-), and works as a pre-driver of AVR.

Q17

DTA143EK

SRV 8V AVR SW

When Q18's base goes "Hi", Q17 is turned on, and SVR 8V AVR is working.

Q18

DTC124EUA

Q19

DTC124EUA

7/9V SW

When a base goes "Hi", Q19 is turned on, and SVR 8V AVR is outp7V.
When a base goes "Lo", Q19 is turned off, and SVR 8V AVR is outp8.5V.

Q20

DTC124EK

BU DETECTION SW

While BACKUP is applied, a base goes "Hi", and Q20 is turned on. 
When momentary power down has detected, a base goes "Lo", and Q20 is turned off.

Q21

2SB1202

BU 5V AVR

While BACKUP is applied, AVR o5V.

Q22

2SC4081

Q21 and Q22 are inverted Darlington connection.

Q30

DTC114YUA

Eccentric disc SW

When an eccentric disc is detected, Q30 is turned on, and a preceding 
beam is made to be delayed.

Q31

DTC124EUA

VIN SW

While spindle servo or disc loading/eject mode is selected, a base goes 
"Hi", and Q31 is turned on.

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CD PLAYER UNIT (X32-5090-0X)

COMPONENT DESCRIPTION