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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25
LOADING
COMPACT
DISCS.
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3
CIRCUIT
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CIRCUIT
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EXPLODED
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MECHANISM
DESCRIPTION
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PARTS:
LIST:
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ADJUSTMENT
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PACKING
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21
SPECIFICATIONS.
v.3)
crceseets
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ened
secede
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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P51 5 47 P121
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Sean
RESET
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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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CCNT P63/KR3 © > P02/S0 DO
RST P62/KR2 © Po3/SI DI
BUCK P61/KRI + 75008GB-672- 3B4 > P80 SRQ
CCE P60/KRO © > Psi MUTE
BUSS P53 => > P30 LOMO+
BUS2 P52 > > P3i LOMO-
BUS] P51 9 > P32
BUS) P50 +> >
P33 SEARCH
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2. Terminal description
KDC-C600
CIRCUIT DESCRIPTION
Pin
Port
Also
used
as:|
I/O
|Signal
Name
Application
1 P72 KR6 0 PON +5 V power control of TC9236F, etc. ‘‘L'’ for ON.
2
|
p71
KR5
o
|
XOFF
Servo
clock
OFF
(16
MHz).
"H’”
for
OFF.
~
3
P70
KR4
|
O
|
8.12
Disc
size
switching.
‘'H’’
for
8
cm.
=.
:
4 P63 KR3 O | CCNT TC9236F subcode update inhibit output. mae for inhibit.
5
|
P62
KR2
o
|
RST
TCQ236F
reset.
"L
forreset.
6 | Pei KR1 o | BUCK TC9236F commandidata communications clock.
7 P60 KRO | oO | CCE TC9236F chip enable. ‘‘L’’ for active. 5
8 P53 VO | BUS3 TC9236F command/data communications bus.
9
P52
7
vO
|
BUS2
-
TC9236F
command/data
communications
bus.
—
o | P51 0 | BUST TC9236F commandidata communications bus. / :
4
1
P50
VO
L
BUSO
TC9236F
commandidata
communications
bus.
eae
a
2 NC Vet. — ako. 2 ~.- — -*
3
|
p43
LOCK
EEM
lock
signal
from
TC9236F.
“HH
for
lock.
_..
:
14 P42 | HOT Hot temperature detection. ‘’H'’ with hot temperature. _ —_ 7
15 | P44 Not used. Connected to GND.
16 P40 | 7 [ ual SSTOP Sled lirmit switch. oa ea with innermost position. ~~ oe _
17
Vss
il
GND
Connected
to
GND.
——
-
C
18 XT1 XT1 Subclock input. Not used, connected to GND. re
19
|
xT2
~—
fo
|
xt2
|
Open.
oo
oe
a
20 | RESET | [| PRESET | w-COoM reset input. “L” for reset =
21 x1 . _ | | x4 Main clock 4.19 MHz oscillator connection. : —
22 X2 —_ a ie) x2 Main clock 4.19 MHz oscillator connection ee — ;
23
P33
O
|
SEARCH
Search
status
output.
“H"
during
search.
—
a = ; oa eens eotichies
25
|
P31
[0
|
tomo-
|
CD
mechanism
toad
motor
—
Ve
26
P30
[9
|
LOMO
+
cD
mechanism
load
motor
+.
ee
:
27
P81
[
O
|
MUTE
Muting
output.
“
‘L”
for
muting
ON.
—
%
28
,
P80
oO |
SRO
a
Communications
service
request to
system
controller.
“ue
for
requesting.
a
29
03
|
SU/SB1
4
DI
Serial
data
input
from
system
controller.
_
bone
:
7
30
PO2
|
SO/SBO
oO
DO
Serial
data
output
to
system
1
controller,
oo
=
;
31 PON 7 SCK sh CLK Serial communications clock from system controller. a <4
32 POO INT4 Not used. Connected to GND.
33
|
p13
TIO
7
Not
used.
Connected
toGND.
7
eo
34 Zk NC L . , a ae - - _ ; : _ :
35 P12 INT2 | AL Not used. Connected to GND. ae Sue!
36 P14 INT1 ‘MSTOP 7 Mechanism control stop. TL for stop and oscillation finish. cee seek euedl
37 P10 INTO cs Communications Service request from system controller. PAL LON, request. |
38 | NC i - 7 7 7 ; 7
39 VDD | VOD Power, +5 V. - cached
40 P23 | TESTS: Test input terminal 3. ‘H" for test mode.
41 P22 | TEST2 Test input terminal 2H for test Ode, _
42 | p21 i Ty | test Test input terminal 1. ""H'' for test mode, — |
43 | p20 “PTO | | TESTO —_| Test input terminal 0. “H’’ for test mode. =e
44 P73 KR7 0 Open.
11

KDC-C600
CIRCUIT
DIAGRAM
€¢
3.
Test
modes
¢
These
test
modes
are
designed
to
allow
checking
the
servo
system
even
in
the
stand-alone
condition
with
which
the
system
-
controller
is
not
present,
for
example
during
the
mechanism
deck
production
process.
They
also
allow
to
load
or
eject
a
disc
without the system controller.
@
Setup
method
and
procedure
The
test
modes
are
set
regardless
of
the
system
controller,
but
by
reading
the
test
terminal
statuses
during
reset
operation.
One
of
the
following
three
modes
can
be
set
according
to
the
statuses
of
the
four
test
terminals.
In
any
test
mode,
the
servo
and
mechanism
powers
should
already
be
turned
ON
before
resetting.
ay
Self-loading
Loading
starts
when
TESTO
terminal
is
“H’""
during
reset.
Os
0.5s
3s
4s
6s
However,
as
the
mechanism
controller
does
not
check
the
RESET
|
i r
sensors,
the
timing
is
always
constant
as
shown
below.
Therefore,
correct
chucking
should
be
checked
visually
or
TESTO
by
monitoring
the
DOWN
SW.
+ +
Operation
<-+)---------
oad
wees
eee
ese
eh
Ee
Wait
Plunger
ON
Stop
<
elf-ejecti
2)
Self-ejection
Os
0.8s
1.58
3.58
Ejection
starts
when
TEST1
terminal
is
‘‘H’’
during
reset.
mene,
Similarly
to
the
self-loading
mode,
the
timing
is
constant
as
RESET
|
shown below.
TEST1
Operation
<7:
7-7-7
>
Ejection
sowie
=~
Stop
¢
Wait Plunger ON
3)
Servo
check
Os
0.5s
The
servo
check
mode
can
be
initiated
when
TEST2
termi-
RESET
[
i ; :
nal
is
‘'H’’
during
reset.
In
this
mode,
the
operations
of
the
! :
(
mechanism
and
servo
can
be
activated
and
checked
sequen-
TEST2
tially
by
simply
applying
‘’H"'
pulse
to
TEST3
terminal.
If
both
TEST2 and TEST3 terminals are ‘‘H’’ during reset, the oper- TEST3 | | | | | | |_| We a
ation
shown
below
occurs
automatically
and
the
last
track
plays. Operation a ee i — ee SE lle el eS
I W tt IV Vv Vi Vil Viit
As
the
pulse
applied
to
TEST
is
not
subjected
to
chattering
Wale
cutting,
only
a
pulse
with
duration
from
100
ms
to
1s
can
be
accepted.
The
servo-related
settings
are
for
use
with
12
cm
disc
only.
|.
Stop.
No
operation
until
pulse
is
applied.
@
Note
ll.
Feed
motor
set
at
home
position.
:
-
lif.
Laser
diode
ON.
The
ic
modes
can
be
canceled
by
resetting
acai
or
by
iy
Focusiageanve
ON:
entering
the
stop
mode.
Communications
with
the
sys-
V.
Disc
motor
kicked,
CLV
ON.
.
Vi.
Tracking
servo
and
feed
servo
ON.
tem
controller
are
not
performed
in
the
test
modes:
In
fil:
Fine
ack
played:
case
more
than
one
test
terminal
goes
‘‘H’’
simultane-
Vlil.
Last
track
searched
and
played.
ously,
the
priority
is
given
in
order
from
TESTO
to
TEST1
(
then TEST2.
12

C
KDC-C600
MECHANISM
OPERATION
DESCRIPTION
. Mechanism structure (configuration)
Roughly
speaking,
the
mechanism
is
composed
of
the
fol-
lowing four functions.
(1)
Mechanism
of
loading,
retaining
and
ejecting
the
magazine.
(2)
Function
pushing
the
disc
out
of
the
magazine.
(3)
Mechanism
made
up
of
the
sled
motor,
spindle
motor,
pickup,
etc.,
which
pulls
the
disc
pushed
out
of
the
magazine
with
rollers.
sets
it
on
the
turntable,
plays
it,
and
moves
it
into
the
magazine
at
the
time
of
ejection
(often
called
CD
mechanism
section).
(4)
Function
moving
the
integrated
mechanism
of
(2)
and
(3)
up
and
down
to
the
positions
which
allow
to
push
the
disc
out
of
the
magazine
or
to
play
the
disc.
. Magazine loading and ejection operations
When
the
magazine
is
seen
from
the
bottom
side,
you
find
two
guide
grooves
and
two
fixing
grooves
on
it.
The
current
mechanism
uses
guide
groove
1
and
fixing
groove
1.
Guide
groove
2
and
fixing
groove
2
are
to
be
used
when
the
magazine
insertion/ejection
direction
becomes
the
same
as
the
disc
pulling-out
direction
in
the
future.
Thread
holes
1
and
2
are
used
in
combination
with
the
LED
light
emitter
and
photosensor
diode
in
order
to
detect
the
movement
of
discs
inside
the
magazine.
13
Fixing groove 1 Guide groove 1
Thread hole 1
~N Disc pulling-out ~
direction
Magazine insertion/
ejection direction {
UP
LED light emitter
Thread hole 1
Mayazine insertion/
ejection direction
Disc pulling-out
direction
$21
LED photosensor

KDC-C600
MECHANISM DESCRIPTION
(1) Magazine loading
The
magazine
is
inserted
by
hand.
When
the
magazine
is
in-
serted
@
using
the
guide
pins
as
the
guide
and
against
the
eject-
ing
force
of
the
lever
(218),
the
magazine
lock
pin
on
the
lever
(217)
is
released
(from
the
taper
section
of
the
lever
(218)).
When
the
magazine
is
inserted
further,
the
lever
(217)
is
slid
@,
the
lock
pin
enters
the
fixing
groove
on
the
magazine,
and
the
magazine
is
locked
by
the
ejecting
force
of
the
lever
(218).
When
the
fever
(217)
is
slid
and
the
magazine
is
locked,
the
switch
(S22)
is
turned
OFF,
enabling
the
detection
of
the
presence
of
the
magazine
e.
(Initial setup of loading mechanism)
When
the
switch
(S22)
is
turned
OFF
for
the
first
time,
motor
MM1
starts
rotation
in
the
clockwise
direction
(when
seen
from
the
output
shaft
side)
to
rotate
the
gear
(230)
clockwise
and
move
the
loading
mechanism
upwards
until
the
initial
position
detection
switch
(S21)
on
the
loading
mechanism
is
turned
OFF.
Then,
motor
MM1
is
inverted
so
the
switch
(S21)
is
turned
ON
again,
and
the
motor
stops
when
the
first
hole
on the
gear
(230)
is
detected
@.
This
condition
becomes
the
initial
status
with
the
position
which
allows
to
load
or
eject
the
first
disc
in
the
magazine.
14
Magazine lock pin 218 (Taper section)
Fixing groove
$22 Magazine
217 Lock release pin
Guide pins
Insertion direction a Ejection direction
Magazine
@
¢

KDC-C600
MECHANISM DESCRIPTION
(2) Magazine ejection
The
magazine
is
ejected
using
motor
MM1.
The
motor
rota-
$21
tion @ is transmitted to the gear (230) @. The cam of the gear
(230) pushes the pin of the lever (217) and releases the lock-
: ‘ oa Detection hole
ing
of
the
magazine
by
sliding
the
lever
(217)
e.
of
gear
(230)
| |
|
| |
|
As a result, with the force of a spring, the lever (218) ejects
the
magazine
@.
During
ejection,
the
damper
(241)
interlocked
6
with
the
lever
(218)
prevents
the
magazine
from
popping
out.
During
ejection
re
ery)
On
the
other
hand,
the
movement
of
the
gear
(230)
reverses
after
the
ejection
hole
is
detected,
and
stops
when
the
first
hole
o(
|
(first
hole
found
after
inversion)
is
detected
(initial
condition)
@.
3 2 1 {Initial position)
Ejection position
Magazine lock pin
218 (Hook) ti a
241
(Damper) © NE
217 (Pin) tC
12 cm disc
8
cm
disc
holding
spring
3.
Loading
and
ejection
of
disc
from/into
magazine
"
;
holding
spring
The disc is pushed out of the magazines by the levers (214)
(216) on the mechanism side. When the lever (214) slides from
the mechanism side @, the lever (216) rotates clockwise @.
With a 12 cm disc, this rotation pushes the circumference of
the disc and pushes it out @.
With an 8 cm disc, the disc is pushed out by means of an arm 1'Gn dees
provided inside the magazine. While all discs are inside the Bem dise
magazine, the mechanism of the levers (214) (216) which travel
together
with
the
loading
mechanism
can
move
up
and
down.
ra
However,
when
one
of
the
discs
is
loaded
in
the
mechanism,
eu
Arai
(for 8 cm disc)
the up and down movement is not possible because the lever
(216) is interfered with the magazine.
* The 8-cm disc magazine is not available for KDC-C600.
L
Magazine insertion/ | :
ejection
direction
Magazine
15

KDC-C600
MECHANISM
DESCRIPTION
(1)
Disc
loading
214
The
disc
loading
operation
of
the
mechanism
starts
with
the
rotation
of
motor
M3
@.
This
power
is
transmitted
via
the
reduc-
tion
gear
train
@.
and
rotates
the
roller
(238)
@
to
make
it
ready
to
pull
in
the
disc
ejected
from
the
magazine.
On
the
other
hand,
the
power
is
also
transmitted
from
the
reduc-
tion
gear
train
to
the
pendulum
gear
(226),
rotating
the
pen-
dulum
(215)
@,
rotating
the
gear
(227)
©,
sliding
the
lever
(214)
@,
and
rotating
the
lever
(216)
@,
thereby
allowing
to
push
the
disc
out
@
@.
When
the
lever
(214)
is
slid,
SSW1
is
turned
OFF
so
that
the
projection
of
the
lever
(216)
can
be
detected.
With
the
current
condition,
it
is
not
possible
to
move
the
load-
ing
mechanism
up
or
down.
After
the
disc
is
pulled
in
by
the
roller
(238),
the
disc
is
forwarded
to
the
specified
position
with
the
same
steps
as
with
the
DXM-200
(single-product
CD
mechanism).
*
Also
refer
to
the
service
manuals
of
the
KDC-77R,
KDC-76D,
etc.
(2)
Disc
ejection
The
disc
ejection
into
the
magazine
follows
the
reverse
steps
to
the
loading
operation
steps.
The
disc
ejected
by
the
roller
(238)
of
the
loading
mechanism
is
placed
to
the
specified
po-
sition
by
the
holding
plate
spring
inside
the
magazine.
At
this
time,
the
lever
(216)
will
not
interfere
with
the
disc
because
it
has
already
been
returned
to
the
original
position
by
the
reversed
loading
operation.
4.
Up/down
movement
of
loading
mechanism
The
movement
is
provided
by
the
pins
which
pierce
both
of
the
fixed
plates
with
vertical
long
grooves
(272)
(702)
and
the
slide
plates
with
oblique
long
grooves
(212)
(213).
When
the
slide
plates
(212)
(213)
slide
to
the
left
or
right,
the
pins
move
up
or
down
along
the
long
grooves
on
the
fixed
plates
(272)
(702).
With
this
mechanism,
the
oblique
long
grooves
on
the
slide
plates
have
staircase
shapes.
A
total
of
five
pins
are
projected
from
the
mechanism.
When
motor
MM1
rotates
@,
the
gear
(230)
is
rotated
via
the
reduction
gear
train
@.
The
rotation
of
the
gear
(230)
rotates
the
gear
(231)
meshed
to
it
@,
thereby
driving
the
slide
plates
(212)
(213)
@
and
moving
the
loading
mechanism.
This
ac-
tion
is
reversed
when
the
motor
rotates
in
the
reverse
direc-
tion.
The
position
of
the
mechanism
is
detected
with
the
hole
on
the
gear
(230).
Loading mechanism
16

KDC-C600
ADJUSTMENT (MECHANISM)
Assembling the mechanism
Arrows @ indicate the hole positions.
(1) Chassis ass‘y
[Description]
Assemble this ass’y by aligning the holes of the gear (227),
slider (214) and lever (216) with the hole on the chassis (204).
[Assembly operation]
1. Align the hole of the chassis (204) with that of the slider
(214). @
2. Attach the gear (227) by aligning the hole of the gear (227)
with that of the chassis (204). @
3. Attach the lever (216) by aligning the hole of the lever (216)
with that of the chassis (204). ©
204
Side view
(2) Chassis caulking ass’y motor
[Description]
Attach the motor by taking care of the position.
{Assembly
operation]
aN)
Attach
by
aligning
the
projection
on
the
chassis
caulking
ass‘y
(205) and the concavity on the motor (MM1).
[Service
note]
Q
If
the
motor
position
is
inverted
by
1800,
the
worm
gear
(235)
M
M
|
of
the
motor
comes
in
violent
contact
with
the
reduction
gear
(234)
and
the
motor
cannot
rotate.
Screw hole
Screw hole Concavity
Projection
17

KDC-C600
ADJUSTMENT
(MECHANISM)
(3)
Chassis
caulking
ass‘y
gear
(230)
[Description]
Adjust
the
position
of
the
gear
(230).
[Assembly
operation]
Rotate
the
gear
(230)
to
align
the
hole
of
the
gear
(230)
with
that
of
the
chassis
caulking
ass‘y
(205).
e
[Service note]
The
gear
(230)
will
not
move
if
the
reduction
gears
(234) (232)
and
motor
are
fixed.
The
gear
(230)
can
be
moved
freely
by
removing
the
fixing
hard-
ware
(256)
and
removing
the
gear
(234).
To
remove
the
fixing
hardware
(256),
rotate
it
in
the
direction
@
and
move
in
the
direction
@.
After
aligning
the
position
of
the
gear
of
the
hole
(230),
attach
the
gear
(234)
then
the
fixing
hardware
(256).
(4)
Chassis
caulking
ass’y
(Description]
Attach
the
chassis
caulking
ass'y
(205)
onto
the
chassis
(702)
by
aligning
the
hole
on
the
slider
ass’y
(213)
with
that
on
the
chassis (702).
{Assembly operation]
1.
Slide
the
slider
ass’y
(213)
to
align
the
hole
of
the
slider
ass'y
(213)
with
that
of
the
chassis
(702).
@
2.
By
pulling
the
slider
(218)
toward
the
direction
of
@,
move
the
slider
(218)
until
the
hole
on
it
is
aligned
with
that
on
the
lever
ass’y
(217).
@
3.
Attach
the
chassis
caulking
ass’y
(205)
onto
the
chassis
(702).
@
[Service note]
If
assembly
operation
step
2
is
not
executed,
the
switch
(S22)
will
come
in
contact
with
the
section
marked
(
*),
and
the
switch ($22) will be damaged.
To
make
the
assembly
operation
easier,
it
is
recommended
to
pull
the
slider
(218)
towards
the
direction
of
@
to
move
it
until
the
positions
of
the
holes
are
aligned
and
to
insert
a
pin,
etc.,
into
the
aligned
holes
@
so
that
the
slider
does
not
return
even
when
your
hand
releases
it.
After
attaching
the
chassis
caulking
ass’y
(205),
be
sure
to
re-
move the pin, etc.
18

KDC-C600
ADJUSTMENT (MECHANISM)
(5} Assembly of CD mechanism and chassis (272)
(Description]
Assemble the CD mechanism, chassis (272) and slider (212)
together by aligning the hole of the slider (212) with that of
the chassis (272).
[Assembly operation]
1. Insert the pin (A) projected from the CD mechanism into the
intersection holes of the chassis (702) and slider ass’y (213).
702
@
2. Insert the pins (B) (C) (D) (E) projected from the CD mechan-
ism into the intersection holes of the chassis (272) and slider 213
(212).@
3. Slide the slider (212) to align the hole of the slider (212) with
that of the chassis (272). @
4. Attach the chassis (272) to the chassis (702). Pin (A)
CD mechanism
bottom panel
Pin (B) Pin (C) Pin (D) Pin (E)
19

KDC-C600
ADJUSTMENT (ELECTRIC)
1.
Tracking
offset
adjustment
Volt/Div:
200
mV
Timer/Div:
0.5
usec.
1.
Connect
a
test
jumper
wire
between
the
test
point
(TEST2)
and
(+5
V).
2.
Connect
a
test
jumper
wire
between
the
test
point
(TOFF)
and
(Vref}.
3.
Connect
an
oscilloscope
between
the
test
point
(TE)
and
(Vref).
4.
Put
the
set
into
play
mode
by
loading
the
disc
5.
Adjust
VR2
so
that
the
oscilloscope
reading
is
symmetrical
in
relation
to
OV.
6.
After
adjusting,
reset
1
and
2
as
original.
.
Focus
offset
adjustment
Volt/Div:
200
mV
Timer/Div:
0.5usec.
Connect
an
oscilloscope
to
the
test
point
(RF)
Put
the
set
into
play
mode
by
loading
the
disc
Adjust
VR1
so
that
the
oscilloscope
waveform
eye
patiern
wn =n
is good
A
good
eye
pattern
means
that
the
diamond
shape
(¢)
in
the
center
of
the
oscilloscope
can
be
clearly
distinguished
.240.3
Vp-p
20