SPECIFICATIONS2
VOLTAGE SELECTION,..'2
AC POWER SUPPLY CORD AND PLUG2
NAMES OF PARTS3
OPERATION MANUAL5
DISASSEMBLY6
REMOVING AND REINSTALLING THE MAIN PARTS8
ADJUSTMENT10
BLOCK DIAGRAM12
SCHEMATIC DIAGRAM / WIRING SIDE OF P.w.BOARD18
NOTES ON SCHEMATIC DIAGRAM40
TYPES OF TRANSISTOR AND LED40
WAVEFORMS OF CD CIRCUIT41
LCD SEGMENT42
TROUBLESHOOTING (DSP SECTION)43
TROUBLESHOOTING (CD SECTION)47
FUNCTION TABLE OF IC"53
REPLACEMENT PARTS LIST/EXPLODED VIEW
Page
SHARP CORPORATION
CD:.K777X
CP:-K7Z7
CD-K777X
• General
Po:wer source:;
Power
consumptlon:
Dimensions:·
Weight:
•
Amplifier
Output
power:
Input
terminals:
Output
terminals:
• Compact
Type:
Signal
readout:
Rotational
Error
correction:
Quantization:
Filter:
DIA
converter:
FreCluency response:
Dynamic
Wow,and
,-----------------------------~
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE
,j""
J
section /
disc
playersection
speed:
range:
flutter:
OPERATldNMANUAL'
:.
AC
110/127/220/230-240 V,
SO/60Hz.
.200W,
..
..:
'
Width~
Height; 316 mm (12-7/16")
Depth;
8.0 kg
...
PMPO; 400 W (total)
MPO; 130 W (65 + 65
(10 % T.H.D.)
RMS;
Stop Button: •
Memory Button
Clear Button
Random Button
'Butto~;
iet t,$uttons"
a:Yt!9n:-~?:';":'
,c'
co',1'trors~ction.'
&APE~~)Bevl,.in~
trAPE
2>:FastForWar~'~utto,:,:.~
2),Stop'.'Bunon:.•'.
play·
_,
I.;J
1lSto~
BLltt~n~
Btitt6ii:;~
Button: •
._~
j:~
~
.: "
",,<c,'
,"
.......
/1-+lI
"",:,..,.
,.'_
'.'.
"
-"j
15
16
':1"
:
"
26272829
i")~~''-:
30
31·3-2'133">:',,'
38
=:.l-==-=~="'=;:~U--;,-:-'!
.!:::::::!,J:===4:::::::!.I-!=~:i!tt"'"'
39
40"
41
:>42'.;..".-:~~
I.=:====~~
j-,.-,o,['J 1
.::.1.J.
1,.:"'1
].'
,
d:,'
34:'
.,,;-
,:
,,;...;..,i
35i i
';j"'/·'L:-',;-,i':.'),"JJ
"
T.'
-"~';
--,>
~
', ',.-
, -.
.-.
36.
Digital Signal Processor Buttons, (SURROUND)
37.
Volume Up/Down Buttons:
38.Balance
39.:
function
40.:
Equalizer Mode Buttons
41.:
Power
42.
Extra Bass Button:
Control' Buttons
Selectqr Buttons
Bulton
X·!3ASS
vIA;
'"
-i
-4-
!~'.
_.' _ .. __ .' '>i
,,')
:,
.,-
..
,'
.'J,'
.'-
'SETTING
lin this exaMple, the clock is set for the
2.4-hour (0:00) system.
EMO
TUN
CLO
DO
FlYI
S
ING
WN
,
;
,
I
"
ET
¢K
\:
THE
,
-I-
-I
UP
1
I
01
1
2
rv-rv n
W
Ii
'I
31:
,u
U
t
.
411_~-,b;---_
5'1
I'_-~=H=:---
6!1
7il----
+0
switcHIthe time display between the 12-hour
~i"nd24-h~pr
Set the
Disconn~
:3
Press
10 seconds.
!
I connect,lthe AC power lead.
5
performl~teps
,'1
modes:
*OWER
the AC power lead from the AC socket.
t~~
RESET button on the rear panel for at least
Ii
CLOCK
, ,
-
-I
n
'11
-U
11-1
/1'
II
1-/
I
I
U
II II
I
==::::::i
I-
l"GIo
(o~
9
0
<n :'1
-U'u
I I I "
'n
'II
-u·u
, I I I
--+
+-
'-('11
-U-·U
, "
I
tr.;-:
I
'-I.~
". I
switch to STAND-BY.
1 - 7 above.
,
11-
I
I J -
II'
t:
I
000
lIQ
~,~
n'
u-
n'
u-
I'"
Ii
U
/,_
u
I"
o'3l
-
PREPARATION
• When the AC power lead is first connected, the clock
indicator will flash at "0:00 CLOCK".
,
/
II
-
r\
-
,
I
0=
~
1 Press the MEMORY/SET bullon.
2 Press the TUNINGITIME (DOWN or UP) bullon to select
the
urne
cflsplay.
"0:00"
"AM
"AM 0:00"
.....
The 24-hour display will appear.
12:00"..... The 12-hour display will appear.
(0:00 - 23:59)
(AM or PM
.....
The 12-hour display will appear.
(AM or PM
12:00 - 11:59}
0:00 - 11:59)
3 Press the MEMORY/SET button.
4 Press the TUNINGfTlME (DOWN or UP) button to adjust
e~
~)
0
~
the hour.
• Press the TUNINGfTlME button once to advance the time
by 1 hour. Press for more than 0.5 seconds to advance
continuously.
• When the 12-hour display is selected, "AM" will change
automatically to "PM".
RESETTING THE MICROCOMPUTER
5 Press the MEMORY/SET button.
6 Press the TUNINGITIME (DOWN or UP) button to adjust
the minutes.
• Keep the button pressed for more than 0.5 seconds to
make the time change in 5 minute
• The hour setting will not advance even if minutes ad-
n·n
n
u·u
u
vance from
7 Press the MEMORY/SET button.
• The clock starts
(Seconds are not displayed.)
Note:
• In the event of a power failure or when the AC power
lead is disconnected, the clock display will go out.
When fhe AC power supply is resumed, the clock display
wiU flash on and off to indicate that the time must be
reset.
If th',shappens, follow
step 1.
To change the
1 Press the CLOCK button. Then, within 5 seconds, press
the MEMORY/SET button.
• If the next step is not
display will go dark.
"59" to "00".
nparatinq from '0" seconds.
the above procedure, starting from
clock
time:
pertorrnadwithin 5 seconds, the
mtervals,
fl
DEMO MODE
FOR USE
EQUAlIZER(
DEMO)
00
o 0
0.2 m - 6 m
(8" - 20')
• Proper
Aim the remote control at the remote control sensor within
3D't>.
Notes
• Replace the batteries if control distance decreases or
• Periodically clean the transmitter window on the remote
• Exposing the sensor on the main unit to strong light Can
• Keep the remote control away from moisture, excessive
• The remote control's usable range is between 0.2
Reset the
procedure
• To erase all of the stored memory contents. or
• If the display does
• The unit does not operate properly.
use
of the remote control
with no obstacles, and operate as shown.
concerning
operation becomes erratic.
control and Ihe sensor on the main unit with a soft cloth.
intel1ere with operation. Change the lighting or the direction of the
heat, shock, and vibrations.
and 6 m
use:
unit
(20'.
away
microcomputer
lor
the eases
not function property, or
from the sensor-
by
performing
shown
below:
the
rn (S")
following
1 Set the POWER switch to STAND-BY.
2 Disconnect the AC power lead from the AC socket.
3 Press the RESET bullon for at least 10 seconds.
When the power is first tumed on, the unit will be in the
demonstration mode. When
mode, each of the displays, Equalizer, X-BASS, Digital signal
processor and Music calendar,
To cancel the demonstration mode, tum off the power. Whilst
pressing the EQUALIZER (DEMO) button, tum on the power.
ttle unit enters the demonstration
will be lit, in order..
o
"'tJ
m
J]
~
o
z
3:
»
z
c:
»
r-
2 Perform steps 4 - 7 above.
To
look
at the time display:
Press the CLOCK button.
• The time display will appear for about 5 seconds.
CO
.·,P'
C
...
K771X
o;K77V'
J-
_,'
_ ..j. ... 1
Caution on Disassembly,.,.,-
Follow
the
below-mentioned notes
unit and reassemblingit, to keep it safe
performance:"
1,
Take
cassette tape and compact disc q!Jt
2. Be
sure
to remove the power supplY-'ph..\gfrorn the wall
outlet
before
starting to disassemblethra:,uni£.j
3.
Take
off
nylon bands or wire holders
when
removed
disassemblingthe uni#
unit, be sure to rearrange the
before disassembling.
installing the pinch roller, pay"attEintion to the spring
method,"
removeltle
the
tapet main belt (E1) x1
'
-'
pinbh~f6l1er
",1
rbrr~!1P9-,\!V.1
":,,
belt
(TAPE~l(~~e
','.
bE!1t
(lA'P'E2)
pawls
(At)
x2 pes.,
/'
x 3 pes.,;II1:thearrow
head ,upward:';
-.
,.-
-~\:
_
hea~(TAPE
,
(<;:1)
x2
pcs.,
(TAPE1/2)
in the direction of the
"
""
d'
,
Fig. a-4.)
fr6irdhe
motor side.
',"
.
(Se-e'Fig.
pc..from
the motorside.
--'
.1
1)
inthe
a-4.)
2. Removethetapl=lg:maih belt (F1) x1pc., from the motbrside.
3. Remove the-FFtREW belt (F2)
How to remove the}11otodSee Fig.
1. Remove the belt.
2. Removethe screws (G1)
3. Remove the screws (G2)x2pes,
Note:
When mounting the motor, paY1;i\temionto the motor mounting
angle.
xi
pc.
s-s.)
x2 pes.,to removethe motor fixture.
to
... , ..
..
~emdveihe
':
motor.
"
J!
:.
,1 I
,."
'0.1
Pawl (C1) x2
FlgurEl8-2
Pinch
Rhller(D1)
HecordlPlaybaek
Head
"..:""
xi
• I
Pawl
(G1) x2
02 x4mm
Figure 8·5
-8-
FigureS-3
,I
..
~Mot"
,~,.
TAPE 2 . TAPE 1
MaIn
Belt
F1jxf
Main
. (E1b<"1, :; 'I: ,
Figu'reB-4
Motor
B~il
.!,!
ITAPE
I
i
11
CD MECHANISM SECTION
Perform steps
remove the CD mechanism.
How to remove the loading motor
(See Fig.
1. Remove the screws (A1) x 2 pes., to remove the loading
motor.
1,2,3,15
9-1.)
and 16 of the disassembly method to
CD-K777X
CP-K777
Figure 9-1
How to remove the select motor (See Fig. 9-2.)
1.Remove the screws (B1) x 2 pcs., to remove the selectmotor.
How to remove the pickup (See Fig. 9-3.)
1. Remove the screws (C1) x 2 pcs., to remove the shaft (C2).
2.Remove the stop washer(C3) x 1pc., to remove the gear (C4).
3. Remove the pickup.
Note:
After removing the Flexible PWB for the optical pickup from the
connector wrap the conductive aluminum foil around the front
end of Flexible PWB so as to protect the optical pickup from
electrostatic damage.
Select Moter
Figure 9·2
( 81 ) x2
02
x5mm
___________________
CD Mechanism
_-CC2}xl..__
--
~~--------------'Eigure..s~-----------
-9-
(C3)
.
x1
__
-CQ.;l)
xt.
MECHANISM SECTION
" , •
".\
j
DrivirigF.()fCE!,
•
,
"'tor'que'Meter
Play:TW-2412
,Tor~ue
,
Play:TIN-2111'
Fastforward:
Rewind:
TW-2231
Test Tape
C?hec;k
Meter
"
'.::
,TW-223.1
"-
,
<:»
-.
;
I
I
,
.,
-
sotc.eo
Adjusting
Point
NormalMTT-111
VRM01;
speed
i:
ITAPE MECHANISM I
.!
Tape 1
Tape2:
:
Tape
g.
)':~i
iSpecified
:Oyer8()g
Over80g
Specified
1,
cr.rJ·
-
TAPE
yalue,
,.,
.
30t060
60toJ 20 g.cm
.-
,
~60t0120
..-
,
Specified
Value
3,000:1:/
30.Hi
,
MECHANISM PWB
ADJUSTMENT
VCl-lue
i
:
: _,I,
,
Tape2
g,.cm
T:
g.cm
Instrument
Connection
Speaker
terminal
(Load
resistance:
8 ohms)
TUNER
fl;::low~mn!lH?frElql,JenGY,:·:
fH: High-renge
• AM IF/RF
S'I400
Igna genera
.Test_Stage.
IF450 kHz1,602kHz
Band
Coverage
Tracking
*1. Input: Antenna,Output:
SECTIO~;,).
-;,
-~I]
frequency
'I
'
-~
z,
or:
Frequency
H30%
AMd
0rna
Frequency
Display
ltd
uae
~f!ttjl1gl
Adjusting
Parts
T351
531
-
kHz(fL):TS04
1.1±
990 kHz990kHz(fL):T302
TP302
, •
".
');'
'-j
Instn.'nf~ntj
Connection
i,'.,,:
*1
"2
0.1
V
"1
*2. Input: Antenna,Output: TP301
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage
Frequency
Frequency
Display
Settingl
Adjusting
Instrument
Connection
Point
Band
Coverage
RF98.00MHz
-
*1:
Input: 'Antenna,Output: TP301
*2. Input: Antenna,Output:
-
87.50MHz L303(fL):*1
1.85V±50mV
"
..
')
(10,-39
I.>
,'co"
.",
dB);
98.00MHz
'j,';"•.
'1~, \-1
L302
-
".'
, ,
Speaker
)i
terminal
;-
'2
,.
\,-J;
• Detection
Signal generator:
Test
Stage
IF10.7MHz
10.7
Frequency
MHz, FM sweep generator
Frequency
Adjusting
Instrument
DisplayPartsConnection
98.00MHz T301(Turn
thecore of
transformer
T301
fully
Input:
IC301
Output:
Pin 1 of
TP302
counterclookwise.)
:-:"
'j
ITUNER PWS:j'-·j
~ITf'302Ii
• FM
Mute
Level
Signal generator: 1kHz, 40 kHz dev., FM modulated
Frequency
98.00
MH"i'
(25dB).L'II)
*1. Adjust so
FrequencyAdjusting
,
._
Disp~ay
;
that
:i.
i.'
an outputsignal appears.
Instrument
Parts
I.;,'
'/
'.
Connection
I 'fnp'I,lSOS01
Output:
",'
"j
.,
.r
50301
ANTENNA
TERMINAL
CNf'301
.....
-
Sp~aker
'TerrtiinaJ
,
Figure 10 ADJUSTMENT POINTS
-10-
CD TEST MODE
• Setting
Anyone
<MEMORY>
Setting of TEST mode]
Infication of CD TST mode (See Fig. 11-1)Initialize is not
OPEN/CLOSE operation is manual operation,performed,
Thlepickup can be moved by using the
Note:
OnIy in STOP state it is possible to slide the pickup with the
VOL.
BAL, --- CENTER
R.GEQ
X-BAS --- OFF
Canceling method - POWER OFF
[!]
00
~~~~
~~~~
CD SECTION
Since this CD system incorporates the following automaticadjustment
function, when the pickup is replaced, it is not necessary to readjust it.
the
test
of 4 test modes can be set by pressing several keys as follows.
<MEMORY><STOP><MEMORY><STOP>
When the tracking servo is -The pickup returns to the -When the tracking servo is -The pickup returns to the
turned on, PLAY is started atordinary stop position.turned off, PLAY is startedordinary stop position.
once.at once.
t
<PLAY> key
._-Last memory
.._-FLAT
~
00
[!]
l!J
mode
+<CD> +<POWER>TEST: CD operation test
(»0-) or (.....) key.
input-
~
00
TOC. IL is performed, and the ordinary PLAY is performed. -Press <STOP> key. -Stop
If the following key is pressed during PLAY, it is possible to
specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15