Kenwood KDC-C600 User manual

COMPACT
DISC
AUTO
CHANGER
KENWOOD
KDC-C600
SERVICE MANUAL
©1992-3 PRINTED IN JAPAN
B51-6448-00 (T) 3674
Metallic cabinet
(A01-2556-02)
KENWOOD
ofise
CLEAN PULS! FIVE CIROWIT
COMPACT
eee
ACs
CH4NGER
KOC-cEeon
10
OSC
-1B8IT-4
0/4
CONVERTER
OSE,
Knob
(K24-1042-04} Panel ass’y
(A20-7816-03)
Bracket (L) Bracket (R)
(J19-4444-04) (J19-4443-04)
Cord with plug
(E30-375 4-05)
Mounting hardware ass’y Disc magazine Screw set
(J21-7328-04)
(J19-4409-12)
(N99-1576-05)
Adhesive tape
(J69-0503-04) : ; ;
Optional ds < magazine:
KCA-M1 16

KDC-C600
CONTENTS
CONNECTION
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LOADING
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MECHANISM
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PARTS:
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SPECIFICATIONS.
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Back
cover
CONNECTION
@ When operating or checking this unit, use CD changer control receiver, KCA-R10, etc.
as a control unit.
KDC-C600
Output
@ Changer extension
cord (5m)
Changer
control
Cl | a [jo 1 Compact disc
auto changer
control unit
(optional)
SPI,

a
KDC-C600
OPERATION
@ Be sure to turn the screw on the bottom of the unit according to the changer’s
instalation orientation (horizontal or vertical).
(The spring is set for horizontal installation when the unit is shipped from the
Bottom view
factory.)
‘(a CAUTION
ie The screw will not
la
(®)
1
turn any further
| once it locks
@ If the screw is v
turned with the
magazine inserted,
the unit may be damaged
Be sure to eject the
magazine before turning the
screw
Turn the screw while
pushing the screwdriver
[lightly
it: z
®@ Vertical installation
(Turn the screw 180° to the left.)
Claw
Turn the screw to
the left until it stops.
(Claws are observed
through the stot.)
® Horizontal installation
(When switching from a vertical to horizontal installation, turn the screw 180° to
the right.)
Turn the screw to
the right until it
stops.
LOADING COMPACT DISCS
isc”
mark
facing up
To remove
Labeled surface
10 discs, one in each stot
@ To remove a disc from the
magazine, press on the rear of the
disc so that it slides out the front
Do not use too much force or the
disc may fly out the front of the
magazine.
@ Discs are number in sequence (1, 2,
3...) from the bottom slot up. Insert
discs into the magazine with their
labeled sides facing up.
A CAUTION
8 cm (3in) CDs cannot be used in this unit. If an 8 cm (3 in} CD adapter ts
used, the disc will not eject
@ insert the disc magazine into the
unit.
® Open the door of the unit
insert the disc magazine titl it clicks.
£JECT switch
® To remove the disc magazite, Open
the door and then press theeJ ECT
switch.
The magazine will not eject if the dior 1s not
completely open.
@ Oust entering the unit will make the
laser pickup dirty and adversely
affect performance. Always be sure
to keep the door closed.
A CAUTION
< When using a new disc >
@ Before using a new disc, be sur t@ check
for burrs around the edges of th chisc’s
center hole and outer circumfernc e (see
diagram at left). If burrs are preent, use a
ballpoint pen or similar instrumeit tO
remove them. If a disc is used with burrs
stil attached, the disc may not it poroperly
im the player or disc magazine, « t he sound
may tend to skip during playbac
Center hole
ye Outer edge
< Disc accessories >
© There are several types of disc accessories ‘stabilizers, protective seals, es,» on the
market designed for various purposes such as sound quality improvemenian d disc
protection. Use of such disc accessories w:li change the thickness or outs
dimensions of the disc with the result that ihe disc will not conform to Stn ard
specifications. Discs with this type of accessory altached may cause the jgc> Changer
io malfunction and shouid therefore not be used with this unit

KDC-C600
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Device
KDC-C600
CIRCUIT DESCRIPTION
Use and Function Operation and Condition
2S5B1050
Audio power sw
Supplies 14 B to MD.
2SB941
Servo power and mechan:
ism up/down driver power
AVR
DTC124EK
CD-CH ON/OFF SW
DTC124EK
CH-CH RST SW
DTA124EK
Eject SW
DTC124EK
2S5B1188
Audio power Sw
6 V SW
DTA124EK
Muting driver
DTC 24EK
BU detector
28C2412K
Same as 02
751 1 2GF- 740-3BE
CD-CH Gischanin control, control of communications with faechenern con-
troiler, control of communications with head unit
sisted p-COM
S- 80737AN- DI
pe com RST IC
Reset occurs: when VOD becomes 3. 7 V.
SN74H1C367ANS _
Interface buffer
TA7291P
Motor driver | Uprdown « operation.
M5278D05
CD PLAY
ER UNIT (X32-221
Device
5 V AVR VDD for microcomputer
0-00)
Use and Function Operation and Condition
i
TA8191F
RF amp RF signal generation, focusing & tracking servo
TC9236AF
EFM demodulation, error detection & correction, snaie data: output, disc motor
servo, focusing & tracking servo control, search control.
Signal processor
ANS388SR
+-
Actuator driver
| Drives focusing, tracking, sled, spindle and actuator
TA7291F
Motor drive Loading and ejection control.
75008GB-672-384
Bb COM CD mechanism control.
SM5870AS
DIA converter 1-bit digital- -to- -anaiog converter,
NJM4580E
Low- pass filter
TA78LO5F
3-terminal regulator Generates - + +5 V for audio circuitry,
TC 7SU04F
Inverter Inverts LRCK.
TC74ACO4F
Audio pulse output butter.
Inverter
r
2SB624 (BV3)
| Laser power | «contol
2SA1037K
| renmoseature detector
DTC 248K
| Spindle gain: SW
ix ON with 8 cm disc, OFF with 12 cm n disc.
28C2412K_
Focusing error hold Upon detection of scratch, goes ON to nold focusing | error.
OTA 24EK
Level conversion of disc scratch detection pulse
DTCI14YK
Switches low- frequency gain of tracking servo between play anc :search
_ modes.
Logic inverter Inverts he COM output logic t to contro! Q?
Reference potential Generates 4.2 Vin collaboration with TA81S1F.
generation
Gain SW
Controls high- frequency gain of tracking servo
Gain SW Reduces tracking servo upon detection of scratch.
Clock SW
Turns 16 MHz master clock ON/OFF.
Turns +5 V for servoidigital circuitry ON/OFF.
2801624 |
Regulator Generates +9 V for audio circuitry.

KDC-C600
CIRCUIT
DESCRIPTION
Operation and Condition
Device
Use
and
Function
Q15
DTA124EK
Audio
muting
control
Drives
Q16
and
Q17
based
on
level
conversion
of
muting
signal
from
p-COM.
O16,
17
2SD1757K
Audio
muting
OTC124EK
PLL
contro!
019
DTC124EK
D/A
reset
DTC124EK
Emphasis
SW
Upon
detection
of
scratch,
sets
PLL
phase
comparator
output
to
Hi-Z.
Releases
reset
of
D/A
converter
in
synchronism
with
the
rise
of
master
clock.
Inverts
the
logic
of
emphasis
control
output
from
IC2.
IC3:
75112GF-740-3BE
(X29-2310-00)
SYSTEM
MICROCOMPUTER
1: Terminal pin layout
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Also used as:
KDC-C600
CIRCUIT DESCRIPTION
Signal Name Application
STCON
MD p-COM stop signal output. L for stop mode.
Not used.
Not used.
Not used.
Not used.
Not used.
Hardware reset terminal.
System clock oscillator connection. 4. 19 MHz.
System clock oscillator connection. 4. 19 MHz.
Not used.
i
oa
Not used.
Not used.
Not used.
Not used.
obi
+
Not used.
Not used.
Not used.
7 Not used.
t used.
OOOO OJSO;OJSO;LOJOJ;O}O;
t used
t used
Disc down detection. fey when chucked.
Mechanism deck reference position detection
(EJECT).
Not used.
Not used.
GND
GND.
EJECT
Eject SW. my with switch ON.
MGSW
_ Magazine detection. “qe when magazine iS present.
CHCON
Changer ON. “’L"’ for ON.
SRQ
Communication service request from MD He COM. _— ‘ for request.
Not used.
PHOTOA
MD-side loading photosensor. “H"™ while disc is passing. |
EPHOTO
Magazine- side photosensor. “"H’' while disc is passing.
DSPS
MD position selection photosensor. “Ln in normal stop position.
ARMSW
Loading arm SW. “HY during pulling disc in.
PDOWN,
Power down detection. OE indicates momentary power down.
PONB2
Peripheral circuit power ON ‘SW. H: _power ON. L: OFF.
CH —
Negative terminal of disc change motor.
CH+
REQC
Communications request line to head unit. Active “Le :
“DATAH
Positive | terminal of disc change motor.
Communications data line from head unit.
DATAC
Communications data line to head unit.
CHCLK
Communications clock fine with head unit.
REQH
Communications request line from head unit. Active ca igs

KDC-C600
CIRCUIT
DESCRIPTION
¢
Also
used
as:
i
Application
Not used.
Muting output. H: MUTE ON. L: MUTE OFF.
Not used.
Peripheral circuit power ON SW. H: OFF. L: ON.
Head unit communications IC power ON SW. H: ON. L: OFF.
+
C\OSOLOlOlOO;LO;/O;O;Ol1O
Not used.
Not used.
Not used.
Not used.
Not used.
+
Not used.
Not used.
Connected to VDD
+5 V. 7
Communication request to MD p-COM. Active ‘‘L"’.
Communications clock output to MD p-COM. No more than 524 kHz.
Data line from MD p-COM. LSB first.
Data line to MD p-COM. LSB first.
Not used.
MD p-COM reset.
3: Key matrix
This set does not have a key matrix.
4: Initial setup
This
set
does
not
need
destination
setup.
But,
at
the
time
of
initialization
(reset),
care
should
be
used
in
the
following
points.
(
This
set
does
not
perform
initial
up/down
operation
unless
all
of
the
four
sensors
(PHOTOA,
EPHOTO,
DWSW,
ARMSW)
are
clear
[i.e.
there
is
no
disc
in
the
magazine).
This set does not perform disc ejection while the magazine has
already been ejected. If, when you attempt to reset it, there
is a disc inside the MD and the magazine has been ejected in-
sert the empty magazine or eject the disc in the test mode
described in 5, then reset the set.

KDC-C600
o~
CIRUIT
DESCRIPTION
5: Test mode
The
operation
test
mode
with
the
specifications
described
below
can
be
initiated
using
the
CD
changer
fabricated
by
us.
This
test
mode
functions
when
the
head
unit
is
provided
with
the
changer
control
function.
(The
test
mode
may
not
function
with
certain
sets.)
1. Test mode initiation method
Make sure that no disc is present in the mechanism deck.
Fully
open
the
CD
changer
door
(in
order
to
turn
door
switch
$32
ON).
Press
and
hold
the
magazine
eject
switch
on
the
CD
changer,
and
press
the
reset
switch
on
the
head
unit.
First release the reset key alone, then release the eject key.
Start
up
the
head
unit
and
select
the
changer
mode.
On
this
point,
the
head
unit
display
should
show
‘'E-88"".
(The
display
may
not
be
proper
with
certain
head
units.
In
addition,
if
the
connection
check
method
is
not
normal,
the
operation
may
not
occur.)
2. Operation
In
the
test
mode,
disc
loading,
ejection
and
the
mechanism
deck
up/down
operations
can
be
performed
as
desired
using
the
key
operations
listed
below.
Every
operation
occurs
only
while
the
corresponding
key
is
ON,
and
stops
when
the
key
is
OFF.
[Loading operation]
Press
the
forward
track
search
key
to
start
disc
loading
operation.
This
operation
is
canceled
(stopped)
when
the
key
is
switched
OFF.
gh
[Ejection operation]
Press
the
reverse
track
search
key
to
start
disc
ejection
operation.
This
operation
is
canceled
(stopped)
when
the
key
is
switched
OFF.
{Mechanism deck up operation]
Press
the
disc
select
(+)
key
to
move
the
mechanism
deck
toward
disc
No.
10.
This
operation
is
canceled
(stopped)
when
the
key is switched OFF.
(Mechanism deck down operation]
Press
the
disc
select
(—)
key
to
move
the
mechanism
deck
toward
disc
No.
1.
This
operation
is
canceled
(stopped)
when
the
key is switched OFF.
co
wo
. Test mode cancellation method
Normal
operation
can
be
resumed
by
canceling
the
CD
changer
mode,
resetting
the
set
or
turning
Acc
OFF.
However,
it
should
be
noted
that
the
microcomputer
of
the
CD
changer
starts
reset
operation
when
the
mode
is
reurned
to
normal
operation.
Therefore,
if
a
disc
is
left
inside
the
mechanism
deck,
a
trouble
such
as
double
insertion
of
discs
miy
occur.
To prevent this, make sure that no disc is left inside the mechanism disc before returning to the normal operation mode (Double
insertion ill not occur if the mechanism deck is stopped in a position with which the magazine is capable of accommodating he csc.)
4. Other notes
The operation does not occur with a remote-controlled set such as the KCA-R1 and KCA-R20. Even with ordinary sets, iper ation
by rernote control is not possible.
The test mode should be run with a stable power supply. In case of power down, be sure to press the reset key ard restart
from the beginning.
lf communications with the head unit is not available after quitting the test mode, reset the set.
lf no Operation occurs after the mode start operation, reset the set to make doubly sure.

KDC-C600
CIRCUIT DESCRIPTION
IC6: 75008GB-672-3B4 (X32-2210-00)
MICROCOMPUTER
1. Terminal pin layout
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