Sharp CD C471W Service Manual
CD-C471W
SHARP
SERVICE MANUAL
ciInli%
DIGITAL AUDIO
YYI
Manufactured under license from Dolby Laboratories Licensing Corporation.
DOLBY, the double-D symbol 00 and “PRO LOGIC”
are trademarks of Dolby Laboratories Licensing Corporation.
SURROUND
PRO f LOGIC
No. S6845CDC471
W/
CD-C471 W
CD-C471 W mini component system consisting of
CD-C471 W mini component system, front (CP-C471), senter
(GBOXS0006AWM6)and surround(GBOXS0007AWM6)
Speaker System.
l
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
/
SAFETY
VOLTAGE SELECTION..
SPECIFICATIONS ............................................................................................................................................................
NAMES OF PARTS
OPERATION MANUAL
DISASSEMBLY.. ...............................................................................................................................................................
REMOVING AND REINSTALLING THE MAIN
ADJUSTMENT.. ..............................................................................................................................................................
NOTES ON SCHEMATIC DIAGRAM
TYPEQF TRANSISTOR AND LED
BLOCK DIAGRAM
SCHEMATIC DIAGRAM
WAVEFORMS OF
TROUBLESHOOTING (CD CHANGER CONTROL / CD SECTION). ............................................................................
FUNCTION TABLE OFIC..............................................................................................................................................
FL DISPLAY
REPLACEMENT PARTS LIST/EXPLODED VIEW
PRECAUTION FOR SERVICE MANUAL
....................................................................................................................................................................
..................................................................................................................................................
..........................................................................................................................................................
.....................................................................................................................................................
.............................................................................................................................
................................................................................................................................
..........................................................................................................................................................
CIRCUIT..
CD
/WIRING
SIDE OF
...................................................................................................................................
CONTENTS
..........................................................................................................
PARTS..................................................................................................
P.W.BOARD.. ..........................................................................................
Page
IO
11
14
14
15
18
39
40
44
54
.
2
2
3
4
6
7
SHARP
CoRPoRATloN
This document has been published to be used
for after sales
The contents are subject to change without notice.
selvice
only.
CD-C471
W
SAFETY PRECAUTION FOR
SERVICE MANUAL
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
forthis
model is specified to belowerthan Class I Requirements.
However, the following precautions must be observed during
servicing to protect your eyes against exposure to the Laser
beam
(1) When the cabinet has been removed, the power is turned
on without a compact disc, and the Pickup is on a position
outerthan the lead-in position, the Laserwill Iightforseveral
,seconds
(2) The Laser Power Output of the Pickup inside the unit and
replacement service parts have already been adjusted prior
to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens
at any time.
(5) CAUTION - Use of controls or adjustments, or performance
of procedures other than those specified herein may result
in hazardous radiation exposure.
to detect a disc, Do not look into the Pickup Lens.
Laser
Dkode
Properties
Material:
GaAlAs
Wavelength. 780
Emission
Laser Output:
CAUTION
0
This Mini Component System is classified as a CLASS
1
LASER product.
0
The CLASS 1 LASER PRODUCT label is located on the
rear cover.
l
Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
As the laser beam used in this compact disc player is
harmful to the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel only.
Duration:
max. 0.6
nm
continuous
mW
1
VOLTAGE SELECTION
The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction the correct voltage figure is displayed in the window next to the adjustment screw.
QACCB0002AWOO
QACCE0005AWOO
92LCORDZ1652A
El
92LCORD5776
QACCL0002AWOO
92LPLUG027
92LPLUG155A
Figure 2 POWER SUPPLY CORD AND PLUG ADAPTOR
-2-
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
CD-C471
W
0 General
Power source:
Power consumption:
Dimensions:
Weight:
0
Amplifier
Output power:
Input terminals:
Output terminals:
section
AC 11
50160
112w
Width; 270 mm (1
Height; 303 mm (1 l-l
Depth; 350 mm
7.1 kg (15.3
PMPO; 1,000 W (total)
Front speakers;
MPO; 176 W (88 W + 88 W)
(10 % T.H.D.)
RMS; 80 W (40 W + 40 W)
(10 % T.H.D.)
Center speaker;
MPO; 32 W (10 % T.H.D.)
RMS;
Surround speakers;
MPO; 32 W (10 % T.H.D.)
RMS;
Video/Auxiliary (audio signal) x 2;
500
mVl47
Front speakers; 6 ohms
Center speakers; 4 ohms
Surround Speakers; 8 ohms
Headphones;
(recommended; 32 ohms)
0 Compact disc player section
Type:
Signal readout:
DIR
Converter:
Frequency response:
Dynamic range:
3-disc
Non-contact,
laser pickup
1 -bit D/A converter
20 - 20,000
90 dB (1
O/l 27/2201230-240
V,
Hz
O-5/8”)
3116”)
(13-13/16”)
Ibs.)
20 W (10 % T.H.D.)
20 W (10 % T.H.D.)
kohms
16-50
ohms
multi-play compact disc player
3-beam
semi-conductor
Hz
kHz)
l
Cassette deck section
Type:
Frequency response:
Motor:
Signal/noise ratio:
Compact cassette tape
50 - 14,000 Hz (Normal tape)
DC motor with electronic governor x 1
55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)
Bias and erasure
system:
Tape speed:
Wow and flutter:
Heads:
AC
4.76
0.15 % (WRMS)
TAPE-l : Playback x
TAPE-2: Record/playback x 1
0 Front
Type:
speaker
section
3-way
50 mm (2”) tweeter and super tweeter]
Maximum input power:
Impedance:
Dimensions:
80
6
Width; 200 mm
Height; 300 mm
Depth; 253 mm
Weight:
l
Center speaker section
Type:
Maximum input power: 40
Impedance:
Dimensions:
2.7 kg (5.8
100 mm (4”) full-range speaker
4
Width; 262 mm (1
Height; 145 mm
Depth; 201 mm
Weight:
1.2 kg (2.6
cmlsec.
type
W
ohms
W
ohms
(l-718 ips)
Erase x 1
[130
mm
Ibs.)/each
Ibs.)/each
1
(5-l/8”)
(7-7/8”)
(11-13/l
(10”)
O-5/1
(5-3/4”)
(7-15/l
woofer,
6”)
6”)
6”)
l
Tuner
section
Frequency range:
FM; 88 - 108 MHz
AM; 531 - 1,602
kHz
l
Surround speaker section
Type:
Maximum input power: 20
Impedance:
Dimensions:
100 mm (4”) full-range speaker
W
8
ohms
Width; 170 mm
(6-3/4”)
Height; 122 mm (4-l 3/l 6”)
Weight:
Depth; 176 mm
0.7 kg (1.5
(6-1916”)
Ibs.)/each
Specifications for this model are subject to change without
prior notice.
-3-
CD-C471
n
Front Panel
1.
(CD) Disc Tray
2. (CD) Disc Number Select Buttons
3. (CD) Disc Skip Button
4. (CD) Open/Close Button:
W
4
NAMES OF PARTS
5. (CD) Play Indicator:
6. (CD) Repeat Indicator:
7. (CD) Pause Indicator:
8. (CD) Disc Number Indicators
9. Dolby Pro Logic Indicator
10. Sleep Indicator
11. (TUNER) FM Stereo Mode Indicator: ST
12. (TUNER) FM Stereo Indicator:
i3.
Extra Bass Indicator: X-BASS
14. (CD/TUNER) Memory Indicator
15. (TAPE) Direction Indicators
16. (TAPES) Reverse Mode indicator:
17.
(TAPEP)
18. Timer Indicator
19. Spectrum AnalyzerNolume Level/Balance Indicator
20. On/Stand-by Button
21.
Bypass Button
22. Center Mode Buttons: NORMAL/PHANTOM
23. Extra Bass Button: X-BASS
24. Volume Up/Down Buttons:
25. Function Selector Buttons
26. Headphone Socket
27. Clock Button
28. Timer/Sleep Button
29. (TAPES) Record Pause Button: l 11
30. (CD/TAPE) Stop Button:
31. Equalizer Selector/Demo Mode Button
32. CD Edit Button
33. Tape 1 Edit Button
34. Tuning and Time Up/Down Buttons: ,,/,..,
35. Memory/Set Button
36. (CD) Track Down/Review Button:
(TUNER) Preset Down Button:
(TAPEP)
37. (TAPE 2) Reverse Play Button:
38. (TAPE 1) Play Button:
(TAPE 2) Forward Play Button:
(CD) Play/Repeat Button: )
39. (CD) Track Up/Cue Button:
(TUNER) Preset Up Button:
(TAPE2) Fast Wind Button:
40. (TAPES) Reverse Mode Button
41. (TAPE 1) Cassette Compartment
42. (TAPE 2) Cassette Compartment
Record indicator
Fast Wind Button:
)
4
11
a,
c-I
~1~7
n
u/w
a/~(
++
4
)
)
4
))/))1
))/))1
))
567
f
8
9
I
15 16 17 18 19
25
26
1
27 28 29
30
3435 36 37 38 39 40
41
10
j
2324
3132 33
42
-4-
n
Rear Panel
1.
CD Digital Output Socket
2. AC Voltage Selector
3. AC Power Input Socket
4. AM Aerial Terminal
5. Aerial Earth Terminal
6. FM 75 Ohms Aerial Terminal
7. Video/Auxiliary (Audio Signal) Input Sockets
8. Sub Woofer Output Socket
9. Span Selector Switch
10.
Front Speaker Terminals
11.
Center Speaker Terminals
12. Surround Speaker Terminals
n
Speaker Section
0
Front Speaker
1. Super Tweeter
2. Tweeter
3. Woofer
4. Bass Reflax Duct
5. Speaker Wire
I6
llilllllflillillflil
llilllilllllllliliil ~
Left
speaker
/l/l/1!/
llilllll I
-4
I I
I
llllll
lliill
CD-C471 W
0
Center
6. Full-Range Speaker
7. Speaker Wire
0
Surround
8. Full-Range Speaker
9. Speaker Wire
n
1. Remote Control Transmitter LED
2. Surround Level Buttons:
3. Center Level Buttons:
4. Dolby Pro Logic Button
5. Center Mode Button
6. Test Tone Button
7. Balance Control Buttons: < /
0
Tuner control section
8. Preset Up/Down Button:
l
9. Disc Skip Button
10. Play/Repeat Button:
11.
Memory Button
12. Clear Button
13. Pause Button:
14. Track Down/Review Button:
15. Track Up/Cue Button:
16. Stop Button:
17. Random Button
Speaker
Speaker
Remote Control
,,I,,
V/A
,,jA
CD Control section
)4
11
))/)H
q
>
q/f++
l
Tape control section
18. (TAPE 2) Reverse Play Button:
19. (TAPE
(TAPE1)Play Button/
20.
(TAPE 2) Forward Play Button:
(TAPE2)Record Pause Button:
21.
(TAPE2)Fast Wind Button:
22.
23. (TAPE 2) Fast Wind Button:
0
Common section
24. Equalizer Mode Button
25. Function Selector Buttons
26. On/Stand-by Button
27. Extra Bass Button: X-BASS
28. Volume Up/Down Buttons:
l/2)
Stop Button:
n
++
))
o/a
+
)
011
6
3
4
5
6
7
8
9
10
II
18
192021
I I I
/
22
24
23
25
26
28
27
-5-
In thts
example,
24-hour
TUNING/’
TIME
(,/fi)
4
51
the clock is
(0:OO) system.
MEMORY/
set for
the
I
SET
\\if/
I, n
1-t
1-I ,-I Cl
,i,!\
0:OO -AM 12:OO - AM 0:OO
+ +
1
Press
the
ON/STAND-BY
2
Press
the
CLOCK
3 "
Within 5 seconds, press the MEMORY/SET
4
Press
the
TUNINGmIME
display
mode.
“0:00”
“AM
“AM
0
Note that this
or it
5
Press
6
Press the TUNINGmIME ( v or A)
0
Press
the
vance continuously.
0
When the 12.hour display is selected, “AM” will
matically to
7
Press
8
Press
minutes.
l
in
0
The
from “59” to “00”.
9
Press
l
The clock starts operating from “0’ seconds. (Seconds are
displayed.)
Note:
l In
is
disconnected,
When the
flash on and
occurred or
If
this
clock
+
The 24.hour display
1200’ +
The
0:OO” +
The 12-hour
can only be
has been
reset (see page
the
MEMORY/SET
the TUNlNGfllME (v
time by 1
Press
5-minute intervals.
hour.
“PM”.
the
MEMORY/SET
the TUNING/TIME ( v or
the button
hour setting will
the
MEMORY/SET
the
event of a power failure or when
AC power
off to indicate
when
happens,
time.
button
to enter
the
stand-by
button.
button.
(vor~) button
(0:OO
23:59)
la-hour
display
(AM or PM
(AM or PM
Press for more
for at least 0.5 seconds to change
the
the AC power
follow
12:OO 11:59)
display will
0:OO - 11:59)
set
when the unit is
button.
or A)
button.
not advance even if minutes advance
button
clock display
supply
is restored,
the
time when
the
procedure below to change
to select
will appear.
will appear.
appear.
30).
button
to
button
once to advance
than 0.5
seconds to
F. ) button to adjust the
the
AC power
will go out.
the
clock display
the
lead
was disconnected.
mode.
the
time
first
installed
adjust the hour.
ad-
change
auto-
the
time
not
lead
will
power failure
the
--1----
0.2 m 6
m
(6” 20’)
I
Notes concerning use:
l
Replace
the
duced
l
Periodically clean the transmitter LED on
and the
l
interfere
of
l
Keep the remote control away from moisture, excessive
shock, and
Reset
l
To erase
settings, and
l If
l If
Note:
l
To erase
contents of preset memory” on
1 Press
2 While pressing down the
INGRIME A
at least 1
batteries if
or if operation becomes erratic.
sensor on the main
Exposing
the
with
operation. Change
the unit.
vibrations.
the
microcomputer
all of the
tuner
the
display is
the
operation is
the
tuner preset memory see “To erase
the
ON/STAND-BY
button. hold
second.
the
operating distance becomes
unit with a
sensor on the
under the
stored memory contents (clock
and
CD presets).
not
correct.
not
correct.
button
VOLUME
down
soft
main unit to
the lighting
following conditions:
page 16.
to enter
v button and the
the
ON/STAND-BY
the
the
remote control
cloth.
strong
light
or
the
direction
and
stand-by
button
may
heat,
timer
all of the
mode
TUN-
for
re-
To change the clock time:
When the unit is in the stand-by mode
l
When the unit is in the
the
DEMO
a Press the
Q Perform steps 6 - 9
When the unit is on:
(?? Press the
Q Within 5 seconds, press the
0
Perlorm
button
MEMORY/SET
CLOCK
steps 6 - 9
demonstration
to enter
above.
button.
above.
the
clock
button
MEMORY/SET
mode,
mode.
press
button
To see the time display:
Press
the
CLOCK
l
The time display
button.
will
appear for about 5 seconds
To change the time display mode:
Q
Press
the
0
Q
Caution:
l
ON/STAND-BY
Whilst
pressing
INGiTlME A
at least 1 second.
Periorm steps 6 - 9 above.
The operatiow’explained above
memory
presets.
button, hold
including
button to
down
the
VOLUME v
down the ON/STAND-BY
clock
and
timer
enter
will
settings, and
the
stand-by
button and the
erase
all
mode.
TUN-
button
data stored
tuner
and
CD
for
in
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1,
Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. Afterservicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
CD-C471 W
iTEF
-
2
3
-
-
-
REMOVAL
TOD
1
4
5
6
7
8
9
10
14
15
Cabinet
Side Panel
(Left/right)
CD Player Unit/
CD Tray Cover
Back Board
Tuner PWB
Main PWB
Front Panel
Display
Switch PWB
Tape
Power
CD Servo PWB
Turntable
CD Player Base
CD Changer
Mechanism
CD Mechanism
PWBI
Mechanisn
Amo.
PWE
PROCEDURE
1. Screw .....................
1. Screw .....................
1.
Turn on the power supply,
open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook ......................
3. Hook ...................... (C2) x2
4.
Screw ....................
5.
Socket ...................
1. Screw ....................
2.
Socket ...................
1. Screw ....................
2.
Socet .....................
1.
Screw ....................
2. Socket ................... (F2) x2
3.
Flat Wire................ (F3) x2
4.
Tip Wire.................
5.
Socket ...................
1. Screw ....................
2.
Hook...................... (G2) x2
1.
Screw ....................
1.
Open the cassette holder.
2. Screw ....................
1. Screw ....................
2.
Socket ................... (K2) x2
3. Push Rivet ............ (K3) x4
1. Screw ....................
2. Cover .................... (L2) x4
1. Screw ....................
2.
Cover ....................
1. Screw ....................
2. Guide .................... (N2) x2
1. Screw ....................
1. Screw ....................
(Al) x4
(Bl)
x6
(Cl) x3
(C3) xl
(C4) x3
(Di)
x13
(D2)
xl
(El) xl 8-l
(E2) xl
(Fl)
xl
(F4) xl
(F5) xl
(Gl)
x2
(Hl)
x12
(Jl)
x5
(Kl)
x4
(Ll)
xl
(Ml) xl
(M2)
xl
(Nl)
x2
(Pl) x4
(Cl)
xl
FIGURE
7-1
7-l
7-2
8-1
a-2
8-2
a-3
a-3
8-4
8-5
8-6
8-6
8-7
8-7
LOCK
m
Figure
7-l
CD Tray Cover
Figure 7-2
Hook
Note
1:
How to open the changer manually. (Fig.7-3)
1.
Insert the tip of fine screwdriver into the hole of CD player
base, and press down the worm wheel c A
2. Then, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
>
Figure 7-3
-7-
lT?F-?l
Front Panel
03
x8mm
Figure
m*
8-1
03 xl Omm
Tuner
PWB
Main PWB
(M2)xl
(
03 xlOmm
Loading Chassis
Figure 8-5
Washer
I
Li ) xl
CD Servo PWB
Turntable
03
xl
Power
Omm
-w /
Figure 8-2
Switch PWB
Figure 8-3
(Kl)x4
03 xl
2mm
(%)
03
x8mm
x203 x’Omm
lolder
(Left/Right)
03
xl Omm
Figure 8-6
(Qi)xl
02.6 xl Omm
Figure 8-4
Be careful when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.
PWB
Figure 8-7
-8-
CD-C471
W
r/RE;pz!Ae;
IF]
Note:
The center and SURROUND speakers can be easily disas-
sembled. Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.
1
PROCEDURE
1
Net
..........................
2. Fromt Panel
3.
Screw ..................... (A3) x2
4. Screw ..................... (A4) x4
5.
Screw .....................
...........
(Al) xl
(A2) xl
(A5) x2
Front Panel
W);l
Super
Tweeter
Tweeter
Figure
A
cl
Woofer
Screwdriver
9-1
-9-
(A4)x4
64
xi 4mm
--AXI
Figure 9-2
I
\
Woofer
/
CD-C471
W
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3, 14 and 15 of the disassembly method
to remove the CD mechanism.
How to remove the turntable up/down motor
(See Fig.
1,
Remove the screws (Al) x 2
up/down motor.
IO-I)
PCS.,
to remove the turntable
Turntable Up/Down
Figure 10-l
M
02
x5mm
How to remove the pickup (See Fig.
1. Remove the screws
xl
pc.
2. Remove the stop washer (B3) x 1
(B4)x
1 pc.
3. Remove the pickup.
(Bl)
x 2
PCS.,
to remove the shaft (B2)
PC.,
to remove the gear
10-2)
( B2 )
xl
Gear
( B4 )
Figure
xl
10-2
-lO-
MECHANISM SECTION
l
Driving Force Check
Torque Meter
Play: TW-2412
l
Torque Check
Torque Meter Specified Value
Play: TW-2111
Fast forward: TW-2231
Rewind: TW-2231
l
Tape Speed
Test Tape
Ml-T-1
Normal
speed
11
Tape 1: Over 80
Tape 2: Over 80
Tape 1
30 to 60 g. cm
-
-
Adjusting
Point
VRMl
3,000
30
ADJUSTMENT
Specified Value
g
g
Tape 2
30 to 100
50 to 100
50 to 100
Specified Instrument
Value
f
Hz
g.cm
g.cm
g.cm
Connection
Speaker
terminal
\
CD-C471
W
TUNER SECTION
fL:
Low-range frequency
fH:
High-renge frequency
l
AM IF/RF
Signal generator: 400 Hz,
Test Stage Frequency Frequency
IF
AM Band
Coverage
AM
Tracking
*l.
Input: Antenna, Output: TP302
*2.
Input: Antenna, Output:
Notes:
1: Description of the “FM IF Adjustment” is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can’t obtain each part individually
450
-
990
kHz
kHz
30%,
AM modulated
Display
1,602
kHz T351
531
kHz (fL):
990kHz
Setting/ Instrument
Adjusting Connection
Parts
*1
1.1 * 0.1
(fL):
TP301
T306
T302
“2
v
*1
TAPE MECHANISM PWB
I
T351
*
FM Mute Level
Signal generator: 1
kHz,
40
kHz
dev., FM modulated
i
/
T306
TUNER PWB
I
/
50301
ANTENNA
l-----D
TERMINAL
AM BAND
COVERAGE
Figure 11 ADJUSTMENT POINTS
AM
TRACKING
-ll-
CD-C471
TEST MODE
l
Setting the test mode
W
Any one of test mode can be set by pressing several keys as follows.
<REC.
PAUSE> + <CD> +
l
TEST
mode
Function - CD test
Sytting
of TEST mode
In;fication
of CD TST mode (Fig.l2-1)
<POWER>
mode
TEST: CD operation test
IL is not performed.
OPEN/CLOSE operation is manual operation.
Thk
pickup can be moved by using the
<MEMORY>
LASER ON
t
<PLAY>
key
<MEMORY>
-
Tracking on the spot. - Tracking on the spot. - STOP
SERVO OFF PLAY
input-
TOC. IL is performed, and the ordinary PLAY is performed. - Press
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
()))
or
(M)
<MEMORY>
SERVO ON PLAY
key.
1
<STOP>
Note:
Only in STOP state it is possible to slide the pickup with the
VOL. --- Last memory
BAL. --- CENTER
R.GEQ.
--- FLAT
X-BAS --- OFF
()))
or
(q)
key.
Canceling method - POWER OFF
<STOP>
key. - Stop
I
Figure
12-1
CD SECTION
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of
l
Automatic adjustment item
1.
Focus offset (Fig.1 2-2)
2. Tracking offset
(Fig.12-3)
3. E/F balance (tracking error balance) (Fig.12-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
each disc is played back using the optimal settings.
0.1s
0.50
v
ICl @
FOCUS
OFF-SET
ADJUST
0.1s
0.50
v
ICI @FETE
TRACKING
OFF-SET
ADJUST
PWB
and laser pickup unit is not restricted.
10ms
0.50
v
ICI @
FE
1 Oms
0.50 v
ICI
@TE
t
1 I
i j
TRACKING
Enlarged
VIFM
OFF-SET
, ADJUST
200
1 V/d
IC 1
Figure
12-2
Figure 12-4
TRACKING/
ERROR
BARANCE
ADJUST
-12-
Figure
12-3
CD-C471
W
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
Outline
l
l
Namely, two speakers are connected in parallel to one
amplifier.
l
In the Pro Logic BYPASS mode the amplifierfor C-ch (center
channel) and the amplifier for S-ch (surround channel) are in
MUTE state. The SP output is cut.
l
State of element output and terminal output in specific mode
In the normal mode of Pro Logic ON mode the amplifiers for
C-ch
and S-ch are in operative state, so that the SP output
appears.
l
In the Phantom mode of Pro Logic ON mode the amplifier for
C-ch is in MUTE state, so that the SP output is cut. The
amplifier for S-ch (surround) is in operative state, so that the
SP output appears
Dolby Pro Logic
L
IC501 1
12 pin L-out Output enabled state
Bypass mode
11 pin R-out Output enabled state
IC501’ /
9 pin C-out 1 No output
IC501/ 10 pin S-out / No
I
SP
OUT
(SO901)
L-ch I Output enabled state
R-ch ,Output enabled state
SP OUT C-ch
(SO901
SP OUT
(SO901
)
S-ch
)
OutDut
No output in MUTE
(Q604)
state Output enabled state
No output in MUTE (Q603) state
Test tone output
l
Pro Logic ON Normal mode
Press the remote control TEST TONE button.
--+Output
-r
of only L-ch
+Output
of only C-ch
Output of only S-ch t Output of only
1
R-ch
The test tone (noise) is repeatedly output for output period
(2 set).
In
this case the following indication appears repeatedly.
-TEST +L-ch -Gch
T
L
S-ch t R-ch
l
Pro Logic ON Phantom mode
Press the remote control TEST TONE button.
+Output
of only L-ch
-tOutput
of only R-ch
I-
t
Output of only S-ch
1
The test tone (noise) is repeatedly output for output period
(2
set).
In this case the following indication appears repeatedly.
-+TEST +
L-ch +
1‘
R-ch
.L
t S-cht
Relation between VIDEO IN input and output in Pro Logic
ON state
(1)
L-ch/R-ch
same phase input into VIDEO IN input jack in
VIDEO Function mode
Dolby Pro Logic On mode
Normal mode
Output enabled state
Output enabled state
1
Output enabled state
1
Output enabled state
I
Output enabled state
Output enabled state
Output enabled state
(SO901) SP
(SO901) SP
(2)
L-ch/R-ch
out C-ch
out
reverse phase input into VIDEO IN input jack in
VIDEO Function mode
(Reverse phase: Phase difference between L and R is
(SO901) SP
(SO901) SP
out C-ch
out
Output point
SP
out
(SO901)
(SO901) SP
(SO901) SP
l
Accordingly, if you want to output signal waveform to C-ch SP
out C-chSP cut, no output
out
out, give the same phase input into
Pro Logic Normal mode.
If one of channels receives input, C-ch does not output. Only
L-ch or
R-ch
outputs.
Phantom mode
1
Output enabled state
Output enabled state
1
No output
/
Output enabled state
/
Output enabled state
I
Output enabled state
No output in MUTE
(Q604)
state
Output enabled state
SP cut, no output
S-ch Almost no output (only omitting component)
180”)
Almost no output (only omitting component)
Almost no output (only omitting component)
Almost no output (only omitting component)
S-ch
Input signal is output.
Phantom mode
L-ch1 Almost no output (only omitting component)
R-ch Almost no output (only omitting component)
S-ch Input signal is output.
L-ch/R-ch
INPUT in the
(SO901)
SP out
C-ch
(50901) SP out
Almost no output (only omitting component)
Almost no output (only omitting component)
Input signal is output.
S-ch
Almost no output (only omitting
component)
-13-
l
If you want to output signal waveform to
S-ch
SP out, you can
use either Normal mode or Phantom mode. However, 180”
reverse phase input must be given to
L-ch/R-ch
INPUT.
CD-C471 W
NOTES ON SCHEMATIC DIAGRAM
l
Resistor:
To differentiate the units of resistors, such symbol as K and
M
are used: the symbol K means 1000 ohm and the symbol
M
means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
l
Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/withstand
voltage” is used.
(CH), (TH),
(ML): Mylar type
(P.P.): Polypropylene type
l
Schematic diagram and Wiring Side of
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION
SW1
(RH),
(UJ): Temperature compensation
OPEN/CLOSE
P.W.Board
POSITION
ON-W
for this
l
The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis with no signal given.
1. In the tuner section,
( )
indicates AM
2. In the main section, a tape is being played back.
3. in the deck section, a tape is being played back.
( )
indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
l
Parts marked with “A ” ( c - - - 7) are important for
-mm
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
SW71 1
SW712
SW718
SW719
SW721
SW723
TAPE
VIDEO/AUX
CENTER MODE/PHANTOM
CENTER MODE/NORMAL
DOLBY PRO LOGIC BYPASS
REC PAUSE
ECB
u)(2)(3)
KTAI
268 GR
KTA1271
Y
KTC3199 GR
KTC3203
Y
ON-E
/
SW801/ VOLTAGE SELECTOR
ON-E
ON-m
ON-E
ON-CJj--J
ON--m
(3)(2x1)
SWM 3 REC FWD
SWM4
REC RVS
SWM 5 F.A.S.
SWM 6 CAM
+H-
KVl236223F
Figure 18 TYPES OF TRANSISTOR AND LED
-14-
333GTH2
1
110-127-
220-230-240
ON--~
ON--E
ON-W
ON--QE4
PICKUP UNIT
ry
‘t
i.
FOCUS
COIL
*--
TRACKING COIL
-.
CNP99
DIGITAL
OUT
CNPI
t
FM0 SERVO/SIGNAL
FMIN
1
t
t
RES. CQCK. COIN
SQOUT. RWC. WRQ
SKI
MOTOR
PICKUP IN
SW4
D?&
MOTOR
t
DAT.
SELIAL CONTROUCE
.I
SLt.
SL-.
DRF
b+Bl
n,
/
OPEN/CLOSE
CNPIP
t
-
I I
Ill
I
-
-
-
c
i
Figure 16 BLOCK DIAGRAM
-16-
(2/3)
r------I
----__-__
w
‘UTER
CD-C471
W
lC56115621563
N5M4558L
lC562(1/2)
Figure 17 BLOCK DIAGRAM
- 17-
(3/3)
CD-C471
W
I
i
I
PICKUP UNIT
---------
------_
I
WOTOR PWB3
---
TRT&t
FOC
Fc-.
GND
PD
VR
1
L-.-.-.--.-...
L
-
85
201
-
-
0”
0”
0”
2”
2”
25”
2%
25”
4.7”
07”
-
-
-.-.--.-.-CNKq$&
l
The numbers 0 to @ are waveform numbers shown in page 39.
l
NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
1
I
2
I
3
I
Figure 18 SCHEMATIC DIAGRAM
-18-
4
I
5
I
b
I
(l/13)
H
CD SIGNAL
CD-C471
W
.-.-.-.__.~
H
CD SIGNAL
i_cD SERVO PWB-C.Lj
._-,~
1 JACK PWB-A4
.-.-.L
CD
DIGITAL
OUT
7
a
9
10
11
12
I
Figure 19 SCHEMATIC DIAGRAM (Z/l 3)
-19-
CD-C471
W
l
NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
1
2
3
Figure 20 SCHEMATIC DIAGRAM
-
20
4
5
6
(3/13)
-
CD-C471
MAIN PWB-A1(1/2)
L-
-
-
-
-
-
w
FM SIGNAL
-
PLAYBACK SIGNAL
=
RECORD SIGNAL
H
CD SIGNAL
R463
.-.-.-.
_,..
,s~E
cmc
155133
W
9
10
Figure 21 SCHEMATIC DIAGRAM
-2l-
HEADPHONE AMP.
(4/13)
11
12
I
CD-C471
W
------_
WE
MECHANISM
I
PWB-F 7
I
SWM4
RECRVS v _
L-CH
TAPE1
PLAYBACK HEAD
A
c
1
LLL--J
I
RI91
‘106
2SC1845 F
Q10.5
2SC1845F
-
RECIP.6.
II
/
1
1
IIRI36 Ic136
/ 1 i.8K )470?
ill
: I’
I
’
l-
l
NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
1
2
I
----------
3
Figure 22 SCHEMATIC DIAGRAM
-22-
h
i
------------
4
(5/l
3)
5
6
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