Sharp CD-C471 W User manual

CD-C471W
SHARP SERVICE MANUAL
No. S6845CDC471 W/
ciInli%
DIGITAL AUDIO
SURROUND
YYI
PROfLOGIC
Manufactured under license from Dolby Laboratories Licens-
ing Corporation.
DOLBY, the double-D symbol 00 and “PRO LOGIC”
are trademarks of Dolby Laboratories Licensing Corporation.
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.
/
CONTENTS
.
Page
SAFETY PRECAUTION FOR SERVICE MANUAL .......................................................................................................... 2
VOLTAGE SELECTION..
..................................................................................................................................................
2
SPECIFICATIONS ............................................................................................................................................................
3
NAMES OF PARTS ..........................................................................................................................................................
4
OPERATION MANUAL ..................................................................................................................................................... 6
DISASSEMBLY.. ...............................................................................................................................................................
7
REMOVING AND REINSTALLING THE MAIN PARTS.................................................................................................. IO
ADJUSTMENT.. .............................................................................................................................................................. 11
NOTES ON SCHEMATIC DIAGRAM ............................................................................................................................. 14
TYPE QF TRANSISTOR AND LED ................................................................................................................................ 14
BLOCK DIAGRAM .......................................................................................................................................................... 15
SCHEMATIC DIAGRAM /WIRING SIDE OF P.W.BOARD.. .......................................................................................... 18
WAVEFORMS OF CD
CIRCUIT.. ...................................................................................................................................
39
TROUBLESHOOTING (CD CHANGER CONTROL /CD SECTION). ............................................................................ 40
FUNCTION TABLE OF IC .............................................................................................................................................. 44
FL DISPLAY .................................................................................................................................................................... 54
REPLACEMENT PARTS LIST/EXPLODED VIEW
SHARP CoRPoRATloN
This document has been published to be used
for after sales selvice only.
The contents are subject to change without notice.

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 to detect a disc, Do not look into the Pickup Lens.
(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.
Laser Dkode Properties
Material: GaAlAs
Wavelength. 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
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 proce-
dures other than those specified herein may result in haz-
ardous 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.
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
92LCORD5776
QACCE0005AWOO
QACCL0002AWOO
92LCORDZ1652A
El
92LPLUG027 92LPLUG155A
Figure 2 POWER SUPPLY CORD AND PLUG ADAPTOR
-2-

CD-C471 W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
0 General
Power source:
AC 11 O/l 27/2201230-240 V,
50160 Hz
Power consumption:
112w
Dimensions:
Width; 270 mm (1 O-5/8”)
Height; 303 mm (1 l-l 3116”)
Depth; 350 mm (13-13/16”)
Weight: 7.1 kg (15.3 Ibs.)
0 Amplifier section
Output power: PMPO; 1,000 W (total)
Front speakers;
Input terminals:
Output terminals:
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; 20 W (10 % T.H.D.)
Surround speakers;
MPO; 32 W (10 % T.H.D.)
RMS; 20 W (10 % T.H.D.)
Video/Auxiliary (audio signal) x 2;
500 mVl47 kohms
Front speakers; 6 ohms
Center speakers; 4 ohms
Surround Speakers; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
0 Compact disc player section
Type:
Signal readout:
DIR Converter:
Frequency response:
Dynamic range:
l Tuner section
Frequency range:
3-disc multi-play compact disc player
Non-contact, 3-beam semi-conductor
laser pickup
1 -bit D/A converter
20 - 20,000 Hz
90 dB (1 kHz)
FM; 88 - 108 MHz
AM; 531 - 1,602 kHz
l Cassette deck section
Type:
Compact cassette tape
Frequency response: 50 - 14,000 Hz (Normal tape)
Motor:
DC motor with electronic governor x 1
Signal/noise ratio:
55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)
Bias and erasure
system:
Tape speed:
Wow and flutter:
Heads:
AC
4.76 cmlsec. (l-718 ips)
0.15 % (WRMS)
TAPE-l : Playback x 1
TAPE-2: Record/playback x 1
Erase x 1
0 Front speaker section
Type:
Maximum input power:
Impedance:
Dimensions:
Weight:
3-way type [130 mm (5-l/8”) woofer,
50 mm (2”) tweeter and super tweeter]
80 W
6 ohms
Width; 200 mm (7-7/8”)
Height; 300 mm (11-13/l 6”)
Depth; 253 mm (10”)
2.7 kg (5.8 Ibs.)/each
l Center speaker section
Type:
100 mm (4”) full-range speaker
Maximum input power: 40 W
Impedance:
4 ohms
Dimensions:
Width; 262 mm (1 O-5/1 6”)
Height; 145 mm (5-3/4”)
Depth; 201 mm (7-15/l 6”)
Weight:
1.2 kg (2.6 Ibs.)/each
l Surround speaker section
Type:
100 mm (4”) full-range speaker
Maximum input power: 20 W
Impedance:
8 ohms
Dimensions:
Width; 170 mm (6-3/4”)
Height; 122 mm (4-l 3/l 6”)
Depth; 176 mm (6-1916”)
Weight:
0.7 kg (1.5 Ibs.)/each
Specifications for this model are subject to change without
prior notice.
-3-

CD-C471 W
NAMES OF PARTS
n Front Panel
1. (CD) Disc Tray
2. (CD) Disc Number Select Buttons
3. (CD) Disc Skip Button
4. (CD) Open/Close Button: 4
5. (CD) Play Indicator: )
6. (CD) Repeat Indicator: 4
7. (CD) Pause Indicator: 11
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: a,
i3. Extra Bass Indicator: X-BASS
14. (CD/TUNER) Memory Indicator
15. (TAPE) Direction Indicators
16. (TAPES) Reverse Mode indicator: c-I
17. (TAPEP) Record indicator
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: ~1~7
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: n
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: u/w
(TUNER) Preset Down Button: a/~(
(TAPEP) Fast Wind Button: ++
37. (TAPE 2) Reverse Play Button: 4
38. (TAPE 1) Play Button: )
(TAPE 2) Forward Play Button: )
(CD) Play/Repeat Button: ) 4
39. (CD) Track Up/Cue Button: ))/))1
(TUNER) Preset Up Button: ))/))1
(TAPE2) Fast Wind Button: ))
40. (TAPES) Reverse Mode Button
41. (TAPE 1) Cassette Compartment
42. (TAPE 2) Cassette Compartment
f
567 8
910
I
15 16 17 18 19 j
25
2324
26
1
27 28 29
30
3132 33
3435 36 37 38 39 40
41
42
-4-

CD-C471 W
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
0 Center
Speaker
6. Full-Range Speaker
7. Speaker Wire
0 Surround Speaker
8. Full-Range Speaker
9. Speaker Wire
n Remote Control
1. Remote Control Transmitter LED
2. Surround Level Buttons: ,,I,,
3. Center Level Buttons: V/A
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: ,,jA
l CD Control section
9. Disc Skip Button
10. Play/Repeat Button: )4
11. Memory Button
12. Clear Button
13. Pause Button: 11
14. Track Down/Review Button: q/f++
15. Track Up/Cue Button: ))/)H
16. Stop Button: q
17. Random Button
-4
I6
llilllllflillillflil
llilllilllllllliliil ~
/l/l/1!/ I I llllll
llilllll I I
lliill
Left speaker
6
l Tape control section
18. (TAPE 2) Reverse Play Button: +
3
19. (TAPE l/2) Stop Button: n
20. (TAPE
1) Play Button/
4
(TAPE 2) Forward Play Button: )
5
8
21.
(TAPE 2) Record Pause Button:
011
6
9
22.
(TAPE 2) Fast Wind Button:
++
710
23. (TAPE 2) Fast Wind Button: ))
II
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: o/a
18 192021
I I I
/
24
25
26
27
22
23
28
-5-

In thts example, the clock is set for the
24-hour (0:OO) system.
TUNING/’
I
TIME MEMORY/
(,/fi)
SET
4
\\if/
I, n 1-t
1-I ,-I Cl
,i,!\
0:OO -AM 12:OO - AM 0:OO
+ +
51
1 Press the ON/STAND-BY button to enter the stand-by mode.
2 Press the CLOCK button.
3 " Within 5 seconds, press the MEMORY/SET button.
4 Press the TUNINGmIME (vor~) button to select the time
display mode.
“0:00”
+ The 24.hour display will appear.
(0:OO 23:59)
“AM 1200’ + The la-hour display will appear.
(AM or PM 12:OO 11:59)
“AM 0:OO” + The 12-hour display will appear.
(AM or PM 0:OO - 11:59)
0 Note that this can only be set when the unit is first installed
or it has been reset (see page 30).
5 Press the MEMORY/SET button.
6
Press the TUNINGmIME ( v or A) button to adjust the hour.
0 Press the TUNlNGfllME (v or A) button once to advance
the time by 1 hour. Press for more than 0.5 seconds to ad-
vance continuously.
0 When the 12.hour display is selected, “AM”will change auto-
matically to “PM”.
7
Press the MEMORY/SET button.
8 Press the TUNING/TIME ( v or F. ) button to adjust the
minutes.
l Press the button for at least 0.5 seconds to change the time
in 5-minute intervals.
0 The hour setting will not advance even if minutes advance
from “59”to “00”.
9 Press the MEMORY/SET button
l The clock starts operating from “0’seconds. (Seconds are not
displayed.)
Note:
l In the event of apower failure or when the AC power lead
is disconnected, the clock display will go out.
When the AC power supply is restored, the clock display will
flash on and off to indicate the time when the power failure
occurred or when the AC power lead was disconnected.
If this happens, follow the procedure below to change the
clock time.
To change the clock time:
When the unit is in the stand-by mode
l When the unit is in the demonstration mode, press
the DEMO button to enter the clock mode.
a Press the MEMORY/SET button
Q Perform steps 6 - 9 above.
When the unit is on:
(?? Press the CLOCK button.
Q Within 5 seconds, press the MEMORY/SET button
0 Perlorm steps 6 - 9 above.
To see the time display:
Press the CLOCK button.
l The time display will appear for about 5 seconds
To change the time display mode:
Q Press the ON/STAND-BY button to enter the stand-by mode.
0 Whilst pressing down the VOLUME v button and the TUN-
INGiTlME A button, hold down the ON/STAND-BY button for
at least 1 second.
Q Periorm steps 6 - 9 above.
Caution:
l The operatiow’explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
presets.
--1----
0.2 m 6 m
(6” 20’)
I
Notes concerning use:
l Replace the batteries if the operating distance becomes re-
duced or if operation becomes erratic.
l Periodically clean the transmitter LED on the remote control
and the sensor on the main unit with a soft cloth.
l Exposing the sensor on the main unit to strong light may
interfere with operation. Change the lighting or the direction
of the unit.
l Keep the remote control away from moisture, excessive heat,
shock, and vibrations.
Reset the microcomputer under the following conditions:
l To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
l If the display is not correct.
l If the operation is not correct.
Note:
l To erase the tuner preset memory see “To erase all of the
contents of preset memory” on page 16.
1Press the ON/STAND-BY button to enter the stand-by mode
2 While pressing down the VOLUME
v button and the TUN-
INGRIME A button. hold down the ON/STAND-BY button for
at least 1 second.

CD-C471 W
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.
iTEF
-
1
PROCEDURE FIGURE
1. Screw ..................... (Al) x4 7-1
1. Screw ..................... (Bl) x6 7-l
1. Turn on the power supply,
7-2
open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook ...................... (Cl) x3
3. Hook ...................... (C2) x2
4. Screw .................... (C3) xl
5. Socket ................... (C4) x3
1. Screw .................... (Di) x13 8-1
2. Socket ................... (D2) xl
1. Screw .................... (El) xl 8-l
2. Socet ..................... (E2) xl
1. Screw .................... (Fl) xl a-2
2. Socket ................... (F2) x2
3. Flat Wire................ (F3) x2
4. Tip Wire................. (F4) xl
5. Socket ................... (F5) xl
1. Screw .................... (Gl) x2 8-2
2. Hook...................... (G2) x2
1. Screw .................... (Hl) x12 a-3
1. Open the cassette holder.
2. Screw .................... (Jl) x5
1. Screw .................... (Kl) x4
2. Socket ................... (K2) x2
3. Push Rivet ............ (K3) x4
1. Screw .................... (Ll) xl
2. Cover .................... (L2) x4
1. Screw .................... (Ml) xl
2. Cover .................... (M2) xl
1. Screw .................... (Nl) x2
2. Guide .................... (N2) x2
1. Screw .................... (Pl) x4
a-3
8-4
8-5
8-6
8-6
8-7
1. Screw .................... (Cl) xl 8-7
REMOVAL
TOD Cabinet
2
3
Side Panel
(Left/right)
CD Player Unit/
CD Tray Cover
Figure 7-l
m CD Tray Cover
Hook
4
-
5
Back Board
Tuner PWB
6 Main PWB
7
Front Panel
8
-
9
-
10
Display PWBI
Switch PWB
Tape Mechanisn
Power Amo. PWE
Figure 7-2
CD Servo PWB
Turntable
CD Player Base
14
CD Changer
Mechanism
15
CD Mechanism
LOCK
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 cA >
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
Tuner
PWB
m* Main PWB
03 x8mm 03 xl Omm
Figure 8-1
-w /
(% ) x203 x’Omm
03 x8mm
Figure 8-2
03 xl Omm
Switch PWB
lolder
(Left/Right)
Figure 8-3
Power
(Kl)x4
03 xl 2mm
( Li ) xl
03 xlOmm
CD Servo PWB
Loading Chassis
Figure 8-5
(M2)xl
Washer
I
Turntable
03 xl Omm
Figure 8-6
(Qi)xl
02.6 xl Omm
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 8-4 Figure 8-7
-8-

CD-C471 W
r/RE;pz!Ae; 1
PROCEDURE
1 Net .......................... (Al) xl
2. Fromt Panel ...........
IF]
(A2) xl
3. Screw ..................... (A3) x2
4. Screw ..................... (A4) x4
5. Screw ..................... (A5) x2
Tweeter A
Front Panel
W);l
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.
cl
Woofer
Screwdriver
Figure 9-1
Super
Tweeter
(A4)x4
/
64 xi 4mm
--AXI I
\
Woofer
Figure 9-2
-9-

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.
Turntable Up/Down
M
How to remove the turntable up/down motor
(See Fig. IO-I)
1, Remove the screws (Al) x2 PCS., to remove the turntable
up/down motor.
02 x5mm
Figure 10-l
How to remove the pickup (See Fig. 10-2)
1. Remove the screws (Bl) x2 PCS., to remove the shaft (B2)
xl pc.
2. Remove the stop washer (B3) x 1 PC., to remove the gear
(B4)x 1 pc.
3. Remove the pickup.
( B2 ) xl Gear
( B4 ) xl
Figure 10-2
-lO-

CD-C471 W
ADJUSTMENT
MECHANISM SECTION
l Driving Force Check
Torque Meter
Play: TW-2412
Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
l Torque Check
Torque Meter Specified Value
Tape 1
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 100
g.cm
Fast forward: TW-2231 -
50 to 100 g.cm
Rewind: TW-2231 - 50 to 100 g.cm
l Tape Speed
Test Tape Adjusting Specified Instrument
Point
Value
Connection
Normal
Ml-T-1 11 VRMl 3,000 f Speaker
speed
30 Hz terminal
\
TAPE MECHANISM PWB
i
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
l AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency Frequency Setting/ Instrument
Display Adjusting Connection
Parts
IF 450 kHz 1,602 kHz T351 *1
AM Band - 531 kHz (fL): T306 “2
Coverage 1.1
* 0.1 v
AM
990 kHz 990kHz
(fL): T302 *1
Tracking
*l. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
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
* FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
/ TUNER PWB /
I
T351
T306
I
AM BAND
AM
COVERAGE TRACKING
l-----D
50301
ANTENNA
TERMINAL
Figure 11 ADJUSTMENT POINTS
-ll-

CD-C471 W
TEST MODE
l Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <CD> + <POWER>
TEST: CD operation test
l TEST mode
Function - CD test mode
Sytting of TEST mode
In;fication of CD TST mode (Fig.l2-1)
1
IL is not performed.
OPEN/CLOSE operation is manual operation.
Thk pickup can be moved by using the ())) or (M) key.
t
<MEMORY>
<MEMORY>
<MEMORY>
<STOP>
LASER ON
- Tracking on the spot. - Tracking on the spot. - STOP
SERVO OFF PLAY SERVO ON PLAY
<PLAY> key input- 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
Note:
Only in STOP state it is possible to slide the pickup with the ())) or (q) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
CD SECTION
Figure 12-1
I
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 PWB and laser pickup unit is not restricted.
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 @
0.1s
0.50 v
ICI @
FE
TE TRACKING
OFF-SET
ADJUST
t 1 I
i j TRACKING
OFF-SET
,ADJUST
Figure 12-2
Figure 12-3
10ms
0.50 v
ICI @ FE
FOCUS
OFF-SET
ADJUST
1 Oms
0.50 v
ICI @TE
200
1 V/d
IC 1
TRACKING/
ERROR
BARANCE
ADJUST
Enlarged
VIFM
Figure 12-4
-12-

CD-C471 W
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
Outline
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 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
l State of element output and terminal output in specific mode
L
Dolby Pro Logic
Bypass mode
IC501 1 12 pin L-out Output enabled state
Dolby Pro Logic On mode
Normal mode Phantom mode
Output enabled state
1 Output enabled state
11 pin R-out Output enabled state Output enabled state
IC501’ / 9 pin C-out 1 No output
1 Output enabled state Output enabled state 1 No output
IC501 / 10 pin S-out / No OutDut
1 Output enabled state
/ Output enabled state
I
SP OUT
I L-ch I Output enabled state
I Output enabled state
/ Output enabled state
(SO901)
R-ch ,Output enabled state Output enabled state Output enabled state
SP OUT C-ch
No output in MUTE (Q604) state Output enabled state No output in MUTE
(Q604) state
(SO901 )
SP OUT S-ch
No output in MUTE (Q603) state Output enabled state Output enabled state
(SO901 )
Test tone output
l Pro Logic ON Normal mode
Press the remote control TEST TONE button.
--+Output of only L-ch +Output of only C-ch
-r 1
Output of only S-ch t Output of only 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- 1
t Output of only S-ch
The test tone (noise) is repeatedly output for output period
(2 set).
In this case the following indication appears repeatedly.
-+TEST + L-ch + R-ch
1‘ .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
Almost no output (only omitting component)
Almost no output (only omitting component)
(SO901) SP out C-ch
Input signal is output.
(50901) SP out S-ch Almost no output (only omitting component)
(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch Almost no output (only omitting component)
(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in
VIDEO Function mode
(Reverse phase: Phase difference between L and R is 180”)
Almost no output (only omitting component)
Almost no output (only omitting component)
(SO901) SP out C-ch Almost no output (only omitting component)
(SO901) SP out S-ch Input signal is output.
Output point
Phantom mode
SP out
L-ch 1 Almost no output (only omitting component)
(SO901) R-ch Almost no output (only omitting component)
(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch Input signal is output.
l Accordingly, if you want to output signal waveform to C-ch SP
out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.
If one of channels receives input, C-ch does not output. Only
L-ch or R-ch outputs.
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.
-13-

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), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
l Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION
POSITION
SW1
OPEN/CLOSE ON-W
SW71 1 TAPE
SW712
VIDEO/AUX
SW718
CENTER MODE/PHANTOM
SW719
CENTER MODE/NORMAL
SW721
DOLBY PRO LOGIC BYPASS
SW723
REC PAUSE
ON-E
ON-E
ON-m
ON-E
ON-CJj--J
ON--m
l The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis 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.
/ SW801 / VOLTAGE SELECTOR
1 110-127-
220-230-240
SWM 3 REC FWD
ON--~
SWM4 REC RVS
ON--E
SWM 5 F.A.S.
ON-W
SWM 6 CAM
ON--QE4
ECB
u)(2)(3)
KTAI 268 GR
KTA1271 Y
(3)(2x1) +H-
KTC3199 GR
KVl236223F
KTC3203 Y333GTH2
Figure 18 TYPES OF TRANSISTOR AND LED
-14-

PICKUP UNIT
ry
i.
‘t
FOCUS COIL
*--
TRACKING COIL
-.
SKI
D?&
MOTOR MOTOR
t
t
t
t
.I
PICKUP IN
SW4
SLt. SL-. DRF
b+Bl
CNP99
DIGITAL
OUT
CNPI 1
FM0 SERVO/SIGNAL
FMIN
RES. CQCK. COIN
SQOUT. RWC. WRQ
DAT. SELIAL CONTROUCE
t
OPEN/CLOSE
CNPIP
n,
/
-

-
-
-
I I Ill
I
i
c
r-------
----__-__
I
Figure 16 BLOCK DIAGRAM (2/3)
-16-

CD-C471 W
w
‘UTER
lC56115621563
N5M4558L lC562(1/2)
Figure 17 BLOCK DIAGRAM (3/3)
- 17-

CD-C471 W
L
-
85
201
-
-
-
-
TR-
I
T&t
FOC
Fc-.
i
GND
PD
VR
I
PICKUP UNIT
---------
0”
0”
0”
2”
2”
25”
2%
25”
4.7”
07”
------_
I
1
WOTOR PWB3
---
L-.-.-.--.-...
-.-.--.-.-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 4 I 5 I b I
Figure 18 SCHEMATIC DIAGRAM (l/13)
-18-

CD-C471 W
H CD SIGNAL
CD
DIGITAL
OUT
1 JACK PWB-A4
.-.-.L
H CD SIGNAL
i_cD SERVO PWB-C.Lj
.-.-.-.__.~ ._-,~
7a
9 10
Figure 19 SCHEMATIC DIAGRAM (Z/l 3)
-19-
11
12
I

CD-C471 W
l NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
1
2345
6
Figure 20 SCHEMATIC DIAGRAM (3/13)
- 20
-