● Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
● "DOLBY" and the double-D symbol are trademarks
of Dolby Laboratories Licensing Corporation.
SERVICE MANUAL
No. YS792CDC1W///
CD-C1W
CP-C1W
● SRS technology Licensed from SRS Labs. SRS technology holds the following patents: U.S. Patent No.
4,748,669 and U.S. Patent No. 4,841,572.
● , the SRS Logo (●) and the
are registered trademarks of SRS Labs, Inc. in the United
States.
SOUND RETRIEVAL SYSTEM
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ................................................................................................................ 2
VOLTAGE SELECTION.......................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ...................................................................................................... 2
NAMES OF PARTS ............................................................................................................................................................... 4
TEST MODE ......................................................................................................................................................................... 14
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 16
TYPES OF TRANSISTOR AND LED.................................................................................................................................... 16
SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................... 20
WAVEFORMS OF CD CIRCUIT.......................................................................................................................................... 42
FUNCTION TABLE OF IC.................................................................................................................................................... 46
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-C1W,CP-C1W
SAFETY PRECAUTION FOR SERVICE MANUAL
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITDOUT A COMPACT DISC IN POSITION AND THE
PICK-UP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICK-UP LENS.
2-THE LASER POWER OUTPUT OF THE PICK-UP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRE-SET BEFORE SHIPMENT.
DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
● This Mini Component System is classified as a CLASS
1 LASER product.
● The CLASS 1 LASER PRODUCT label is located on
the rear cover.
● Use of controls or 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.
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.
VARO !Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING!Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
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 until the correct voltage figure is displayed in the window next to the adjustment screw.
92LCoRDA1387CQACCA0001AW00
92LCoRDT1699AQACCB0005AW00
92LPLUG155AQACCE0008AW00
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
– 2 –
92LPLUG027
SPECIFICATIONS
CD-C1W
● General
Power source:AC 110/127/220/230-240 V,
50/60 Hz
Power
consumption:500 W
Dimensions:Width; 270 mm (10-5/8")
Height; 356 mm (14-3/16")
Depth; 355 mm (14")
Weight:10.5 kg (23.1 lbs.)
● Amplifier section
Output power:PMPO; 2400 W (total)
MPO; 440 W (220 W + 220
W)
(10 % T.H.D.)
RMS; 300 W (150 W + 150
W)
(10 % T.H.D.)
Quantization:16-bit linear
Filter:4-times oversampling digital
filter
D/A converter:1-bit D/A converter
Frequency
response:20 - 20,000 Hz
Dynamic range:90 dB (1 kHz)
Wow and flutter:Unmeasurable
(less than 0.001% W. peak)
CP-C1W
● Speaker section
Type:3-way type [20 cm (7-7/8") woofer,
8 cm (3-3/16") tweeter and super
tweeter]
Rated input power:150 W
Maximum input power: 300 W
Impedance:6 ohms
Dimensions:Width; 295 mm (11-5/8")
Height; 361 mm (14-1/4")
Depth; 378 mm (14-15/16")
Weight:6.7 kg (14.8 lbs.)/each
– 3 –
CD-C1W,CP-C1W
CD-C1W
■ Front panel
11.
Disc 1 Select/Direct Play Button
12.
Disc 1 Open/Close Button
13.
Disc 2 Select/Direct Play Button
14.
Disc 2 Open/Close Button
15.
Disc 3 Select/Direct Play Button
16.
Disc 3 Open/Close Button
17.
Disc Trays
18.
Function Selector Buttons
19.
Remote Control Sensor
10.
On/Stand-by Button
11.
Volume Control
12.
Extra Bass Button
13.
3D Surround Mode Button
14.
3D Surround Pass Button
15.
Equalizer Selector/Demo Mode Button
16.
(CD) Random Play Indicator
17.
(CD/TUNER) Memory Indicator
18.
(TAPE 2) Direction Indicators
19.
(CD) Pause Indicator
20.
(CD) Disc Number Indicators
21.
(CD) Music Schedule Indicators
22.
SRS Indicator
23.
Extra Bass Indicator
24.
Timer Play Indicator
25.
Timer Record Indicator
26.
Sleep Indicator
27.
(TAPE) Dolby NR Indicator
28.
(TAPE) Reverse Mode Indicator
29.
(TAPE) Record Indicator
30.
(CD) Play Indicator
31.
(CD) Repeat Indicator
32.
Spectrum Analyzer/Volume Level Indicator
33.
FM Stereo Indicator
34.
FM Stereo Mode Indicator
35.
(CD) Clear Button
36.
Memory/Set Button
37.
(TAPE) Reverse Mode Button
38.
(TAPE) Reverse Play Button
39.
(TUNER) Tuning Down Button
3
(CD) Track Down/Review Button
3
(TAPE) Fast Wind Button
40.
Jog Dial
41.
(TUNER) Tuning Up Button
3
(CD) Track Up/Cue Button
3
(TAPE) Fast Wind Button
42.
(CD) Play/Repeat Button
3
(TAPE) Forward Play Button
43.
(TAPE) Record Pause Button
44.
(TAPE) Editing Speed Selector Buttons
45.
Headphone Socket
46.
Clock Button
47.
Timer Button
48.
Sleep Button
49.
(CD) Pause Button
50.
(CD/TAPE) Stop Button
51.
(TAPE) Dolby NR Button
NAMES OF PARTS
8
9
10
16 171819 20
28 29303132
35 36 37 38 39 40 41 42 43
12
52
3456
24
21 2223
25
33 34
51504948474645
53
7
11
12
13
14
15
2627
44
52.
(TAPE 1) Cassette Compartment
53.
(TAPE 2) Cassette Compartment
– 4 –
CD-C1W,CP-C1W
■ Rear panel
11. Video/Auxiliary (Audio Signal) Input Sockets
12. Line Output Sockets
13. Span Selector Switch
14. AC Power Lead
15. AC Voltage Selector
16. FM 75 Ohms Aerial Terminal
17. Aerial Earth Terminal
18. SW1/SW2/MW Aerial Terminal
19. Speaker Terminals
■ Remote control
11. Remote Control Transmitter LED
● CD control section
12. Track Down/Review Button
13. Track Up/Cue Button
14. CD Select/Direct Play Buttons
15. Play/Repeat Button
16. Stop Button
17. Memory Button
18. Clear Button
19. Random Button
10. Pause Button
● Tuner control section
11. Preset Up/Down Buttons
● Tape control section
12. Reverse Play Button
13. Record Pause Button
14. Stop Button
15. Forward Play Button
16. Fast Wind Buttons
4
5
2
3
12
13
19
20
1
7
8
1
17
9
11
10
18
2
3
6
7
8
9
4
5
6
14
15
16
23
24
● Common section
17. 3D Surround Pass Button
18. 3D Surround Mode Button
19. Function Selector Buttons
20. Balance Buttons
21. On/Stand-by Button
22. Dimmer Button
23. Equalizer Mode Button
24. Extra Bass Button
25. Volume Up/Down Button
CP-C1W
■ Speaker section
10. Tweeter
11. Woofer
12. Super Tweeter
13. Bass Reflex Duct
14. Speaker Terminals
– 5 –
10
11
21
22
25
12
14
13
CD-C1W,CP-C1W
SETTING THE CLOCK
In this example, the clock is set for the 24-hour
(0:00) system.
MEMORY/
SET
ON/STANDBY
CLOCK
Jog dial
OPERATION MANUAL
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
Turn the jog dial to select the time display mode.
"0:00" → Th e 24-hour displ ay will appear.
(0:00 - 23:59)
"AM 12:00" → The 12-hou r display will appear.
(AM or PM 12:00 - 11:59)
"AM 0:00" → The 12-hour display will appear.
(AM or PM 0:00 - 11:59)
● Note that this can only be set when the unit is first installed
or it has been reset (see page 25).
5
Press the MEMORY/SET button.
6
Adjust the hour by turning the jog dial.
● Turn the dial one click to advance the time by 1 hour.
Keep turning the dial to advance continuously.
● When the 12-hour display is selected, "AM" will change automatically to "PM".
7
Press the MEMORY/SET button.
3
4
2
5
6
7
8
9
8
Adjust the minutes by turning the jog dial.
● Turn the dial one click to advance the time by 1 minute.
Keep turning the dial to advance continuously.
● The hour setting will not advance even if minutes advance
from "59" to "00".
9
Press the MEMORY/SET button.
● The clock starts operating from "0" seconds. (Seconds are
not displayed.)
0:00AM 12:000:00AM
Note:
● In the event of a power 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.
① Press the CLOCK button.
② Within 5 seconds, press the MEMORY/SET button.
③ Perform steps 6 - 9 above.
To see the time display:
Press the CLOCK button.
● The time display will appear for about 5 seconds.
To change the time display mode:
① Perform steps 1 - 2 in the section "RESETTING THE MICRO-
COMPUTER", on page 25.
② Perform steps 1 - 9 above.
– 6 –
CD-C1W,CP-C1W
1,2
2
Reset the microcomputer under the following conditions:
● To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
● If the display is not correct.
● If the operation is not correct.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Press and hold down the button, the EQ/DEMO button
and the ON/STAND-BY button all at the same time. Hold them
for at least 1 second.
RESETTING THE MICROCOMPUTER
(Continued)
■
FM/MW interval (span)
The International Telecommunication Union (ITU) has established
that member countries should maintain either a 10 kHz or a 9
kHz interval between broadcasting frequencies of any MW sta-
tion. The illustration shows the 9 kHz interval zones (regions 1
and 3), and the 10 kHz interval zone (region 2).
Before using the unit, set the SPAN SELECTOR switch (on the
rear panel) to MW tuning interval (span) of your area.
To change the tuning zone:
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Set the SPAN SELECTOR switch to "50/9" for 9 kHz MW
interval (50 kHz FM interval), and "100/10" for 10 kHz MW
interval (100 kHz FM interval).
3
Press and hold down the button, the EQ/DEMO button
and the ON/STAND-BY button all at the same time. Hold them
for at least 1 second.
Caution:
● The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
presets.
FM/MW
(kHz)
SPAN
SELECTOR
50/9
100/10
(Continued)
■Remote control
Notes concerning use:
● Replace the batteries if control distance decreases or oper-
ation becomes erratic.
● Periodically clean the transmitter LED on the remote control
and the sensor on the main unit with a soft cloth.
● Exposing the sensor on the main unit to strong light may in-
terfere with operation. Change the lighting or the direction of
the unit.
● Keep the remote control away from moisture, excessive heat,
shock, and vibrations.
15
15
0.2 m - 6 m
(8" - 20')
– 7 –
CD-C1W,CP-C1W
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 be
removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take suff cient care on static electricity of integrated
circuits and other circuits when servicing.
Note : After removing the connector for the optical pickup
fromthe connector wrap the conductive aluminium foil
around the front end of connector so as to protect the
optical pickup from electrostatic damage.
Figure 8-2
– 8 –
CD Changer Block
(N1)x2
ø3x10mm
CD Servo PWB
CD Changer Holder
(N1)x1
ø3x10mm
Power
PWB
(D2)x1
Ø3x10mm
Rear
Panel
(D1)x8
Ø3x10mm
(E4)x1
Ø3x10mm
(F1)x1
(E1)x1
Front Panel
(E5)x1
Ø3x8mm
(E3)x2
Pull
(E1)x2
(E2)x1
Power
AMP. PWB
Figure 9-1
CD Switch PWB
Display PWB
(D3)x4
Ø3x10mm
Front Panel
(F3)x2
Ø3x10mm
(G1)x2
CD-C1W,CP-C1W
Main PWB
(E4)x1
Ø3x10mm
(E5)x1
Ø3x8mm
Tuner
PWB
(F1)x1
Lug Wire
(F2)x1
Ø3x6mm
Figure 9-4
(H1)x3
Ø3x10mm
(G3)x12
Ø3x10mm
Tape Mechanism
(M2)x4
Ø4x8mm
(K1)x6
Ø3x10mm
Figure 9-2
(M1)x1
Ø3x10mm
Washer
Lug Wire
(L3)x1
Ø3x6mm
(G2)x1
Display
PWB
Headphones
PWB
Open
(J1)x1
Ø3x8mm
Cassette
Holder (Left/Right)
CD Changer
Block
Tray
Switch
PWB
(Q1)x1
ø2x7mm
CD Servo PWB
(P1)x3
(P2)x3
ø3 x10mm
(P1)x3
Figure 9-5
Power Supply
PWB
(L3)x1
Ø3x6mm
(L1)x1
Figure 9-3
(L2)x4
Ø3x10mm
Power AMP.
PWB
– 9 –
CD-C1W,CP-C1W
(B5)x4
ø4x12mm
(B1)x2
ø3x10mm
(B4)x2
ø3x10mm
(B2)x2
ø3x10mm
Front
Panel
Speaker
Box
Super
Tweeter
Tweeter
(B3)x1
Woofer
(R7) x2
ø2 x6mm
Push the pawl of disc tray
with a proper screwdriver.
Back surface
Pawl
Pawl
Disc Tray 3
(After drawing out the disc trays 1, 2, and 3, turn
over the mechanism unit, push two pawls, and
remove successively the three disc trays from the
mechanism unit, starting with the disc tray 3.
Thereby the CD mechanism shown in the right
figure can be removed.)
Disc Tray 1
Disc Tray 2
(R8) x1
(R1) x2
ø2 x7mm
Normal state
Disc Tray 1
(R4) x3
Figure 10-1
Spring
(R2) x1
(R3) x1
(R5) x1
ø2.6 x12mm
Disc Tray 2
Disc Tray 3
(R6) x1
Push
(R9) x1
CD
Mechanism
(R10) x4
ø2.6 x10mm
Turn clockwise the
main cam to raise the
CD mechanism up to
the uppermost position.
Press in turns the arrow
1
parts, starting with the
2
uppermost one, to
3
withdraw the disc trays
.
Pawl
CP-C1W
(A3)x4
ø4x25mm
(A2)x4
(A1)x1
(A4)x2
ø4x20mm
Front Panel
Figure 10-2
Driver
Speaker
Box
Figure 10-3
– 10 –
CD-C1W,CP-C1W
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
For the procedure to remove the CD mechanism from the
main unit, refer to Disassembling Procedure, Steps 1~10, and
19. (p.8).
How to Remove the optical pickup
(See Fig. 11-1.)
1. Remove the screws (A1)x 2 pcs., to remove shaft (A2)x 1
pc.
Note:
After disconnecting the optical pickup connector wrap the
front end of connector in conductive aluminum foil so as to
prevent damage to the optical pickup by static electricity.
How to Remove the tray motor/main cam motor
(See Fig. 11-2.)
1. Remove the CD changer section by the method described
in page 8, and disassemble as shown in the figure.
2. Remove the belts (B1)x 2 pcs., from the motor side.
3. Remove the screws (B2)x 4 pc.
4. Remove the tray motor and main cam motor.
Stop Washer
(A3) x1
Pickup
CD
Mechanism
(B2) x2
ø2.6 x4mm
Belt
(B1) x1
(A1) x2
ø2.6 x5mm
Figure 11-1
Tray Motor
Shaft
(A2) x1
Gear
(A4) x1
(B2) x2
ø2.6 x4mm
Belt
(B1) x1
Main Cam
Motor
How to remove the CD disc
(When CD is in playback state)
(See Fig. 11-3.)
1. Remove the Top cabinet .
2. Disassemble as shown in the figure so that the CD disc of
CD changer becomes visible.
3. Remove the CD disc as shown in the figure.
How to remove the CD disc
(When CD exists in the tray)
(See Fig. 11-4.)
1. Remove the Top cabinet.
2. Disassemble as shown in the figure so that the CD disc of
CD changer can be taken out.
3. Remove the CD disc from the tray as shown in the figure.
CD Mechanism
CD Disc
Disc Tray 1
Figure 11-2
Turn the main cam clockwise,
and raise the CD mechanism
and disc holder up to
uppermost position.
Disc Holder
CD Disc
(When CD is in playback state.)
Figure 11-3
Turn the main cam clockwise,
and raise the CD mechanism
and disc holder up to
Disc Holder
Disc Tray 3
Disc Tray 2
uppermost position.
Press in turns the arrow
1
parts, starting with the
2
uppermost one, to
3
withdraw the disc trays
(When CD exists in the tray)
Figure 11-4
CD Changer
Block
CD Changer
Block
– 11 –
CD-C1W,CP-C1W
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412Tape 1: Over 80 g
• Torque Check
Torque MeterSpecified Value
Tape 1
Play: TW-211130 to 60 g. cm30 to 60 g.cm
Fast forward: TW-223160 to 120 g.cm60 to 120 g.cm
Rewind: TW-223160 to 120 g.cm60 to 120 g.cm
Position of each switch or control
VolumeMAX
3D Surround Mode ButtonPASS
Pre-programmed EqualizerFLAT
Extra BassOFF
FunctionTAPE
Dolby NR switchOFF
X-BassOFF
Keeping the PAUSE button and TUNER button pressed, turn
on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the PRESET button to use it for
adjustment and check of tuner circuit.
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
Hold down the EQ and CD buttons, and press the POWER switch.TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TEST mode (Fig. 14-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (
<MEMORY>
key input
When the tracking servo is activated, playback
will begin at the
Press the
STOP button.
current position.
) or () key.
IL is not performed.
The pickup
willreturn to
the STOP
position.
<MEMORY>
key input
When the tracking servo is activated, playback
will begin at the
current position.
<STOP>
key input
The pickup normally returns to
the STOP position.
<PLAY> key input
TOC. IL is performed, and the ordinary PLAY is performed.
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
Press <STOP> key.Stop
G9G9
G2
G3
G7
G10
G6
G5G5G4
G8
Note:
Only in STOP state it is possible to slide the pickup with the
) or () key.
(
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
CD SECTION
G1~G8
S10
G1
S16
S7
S21
S19
S14
S15
S9S8
S5
S6
S2
G3
G2
S20
S18
S17
S12
S13
S3
S4
G4
G10
S40
S31
S1
Figure 14 -1
G6
S39
S36
S34
S29
S27
S25
G8
G7
S41
S37
S32
S24
S23
S22
G9
S35
S33
S38
S30
S28
S26
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.
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
IC1 16 FD
0.1s
0.50 V
IC1 7 TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
1
Figure 14-2Figure 14-3
TO
TE
2
TRACKING/
ERROR
BARANCE
1
ADJUST
2
10ms
0.50 V
IC1 16 FD
10ms
0.50 V
IC1 7 TE
Figure 14-4
– 14 –
Enlarged
View
TRACKING
OFF-SET
ADJUST
1
2
CD-C1W,CP-C1W
EXPLANATION OF AUTOMATIC SOUND VALUE CORRECTION CONTROL
1. Outline
The recent trend is toward rise of CD record level in the world, for example rock, dancing music, etc. In case of continuous high
level playback G-EQ (graphic equalizer) and VOL (Volume) are controlled (lowered) automatically after a lapse of specific time
(10 minutes) so as to get the easy-to-listen sound level.
2. Explanation of operation
The CD playback operation is explained below.
Distortion clip point
X
0w
10 minutes
A
X : Threshold value of control circuit operation
A : Hight energy (hatched area) exceeding X is detecated, and the control mode is set.
B : After a lapse of 10 minutes the control is started.
B ~ C :
Data is fetched every 4
seconds to control.
Initial frequency
characteristics.
At first, the H and L frequency characteristics are lowered as shown above so thet the distortion
and disturbance are reduced. However, if hight energy exceeding X is detected, VOL is lowered
to get sound easy to listen.
Hand L frequency characteristics are lowered.
BCD
SP output
level
VOL (Volume) is lowered.
C ~ D :
Control mode cancel conditions
Stable control
Continued control
The output data is fetched every 4 seconds to control. When quiet music is played back, the
control is performed so as to restore the initial frequency characteristics and initial VOL values.
When output exceeding X is not given
continuously for 10 minutes.
When the power is turned off or on.
– 15 –
When quiet music is played back.
When VOL is lowered.
CD-C1W,CP-C1W
NOTES ON SCHEMATIC DIAGRAM
• 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.
• 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
• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
• 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
< > indicates FM stereo
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.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
2SC535 C
2SC1845
2SC2236 Y
2SC2878 B
2SC2878 A
2SD468 C
KTA1266 GR
KTA1270 Y
KTA1271 Y
KTA1273 Y
KTC3199 GR
KTC3200 GR
KTC3203 Y
KRA107 M
KRC102 M
KRC104 M
KRC107 M
FRONT
VIEW
B C E
(D)(G)(S)
(3)(2)(1)
2SD2012
2SK2541
FRONT
VIEW
E C B
2SB1375
3
TOP
VIEW
1
KTA1504 Y
KTC3875 GR
SPR325MV
Figure 16 TYPES OF TRANSISTOR AND LED
– 16 –
2
FRONT VIEW
KV1236Z23
484GT44
FRONT
VIEW
KDV147 C
FRONT
333GTH2
333GTH4
VIEW
PICKUP IN
SW702A
242530
31
SL-
SP-
SL+
SP+
IC3
M56748FP
FOCUS/TRACKING/
8
9
SPIN/SLIDE DRIVER
10
11
34
3536
CD-C1W,CP-C1W
M702
SLED
M
MOTOR
FOCUS COIL
TO
FD
SPO
SP
SLD
SL–
SL+
DRF
CLK
CL
DAT
CE
TRACKING COIL
44
4
1
3
2
F
E
FIN2
FIN1
IC1
LA9241M
SERVO AMP.
JP–
CV+
SLC
RFSM
SLI
~
324043
41
62
LD0
64
VCC1
56
VCC2
OPTICAL PICKUP UNIT
LASER
DRIVER
Q1
+5V
M701
SPINDLE
M
MOTOR
12
13
6
7
TR-
FO-
TR+
FO+
1
5
14
22
32
20
27 262829
17
+B1
15
16
27
23
29
30
31
54
50
51
52
53
OPTICAL
PICKUP
IC1
IC2
+5V
Q81
+7.3V (B2)
VOLTAGE
REGURATOR
PU-IN SW
CAM SWITCH
TRAY SWITCH
SWB101
SWB102
SWB103
SWB104
SWB105
SWB106
SWB107
SWB108
SL+. SL–. DRF
CL, DAT, SELIAL CONTROL/CE
53
~
58
61
SERVO SIGNAL
RES. CQCK. COIN
SQOUT. RWC. WRQ
RCHO
RVSS
LVSS
37
3839
40
CONT3
CONT4
CONT5
8
1
9
IC81
TA7291S
MAIN CAM MOTOR
DRIVER
3
7
~
101220
9
JP–
CLV+
EFMO
EFMIN
IC2
LC78622K
CONTROL
LCHO
2726
2
6
5
28
Q51
SWITCHING
+B4
XOUT
VVDD
LVDD
RVDD
XVDD
24
CONT2
CONT1
DRIVER
XIN
VDD
45
XL1
16.934MHz
44
6
23
36
41
43
25
1
9
+5V
IC82
TA7291S
TRAY MOTOR
DRIVER
3
7
4
4
3
3
2
2
1
1
M
M
2
6
5
+B4
MOB2
TRAY
MOTOR
MOB1
MAIN CAM
MOTOR
TO MAIN SECTION
Figure 17 BLOCK DIAGRAM (1/3)
– 17 –
CD-C1W,CP-C1W
5
4
E
A
56
T
T
Y
E
S
Y
T
T
E
M
S
R
N
S
Q
FM BAND
PASS FILTER
SO301
ANTENNA
TERMINAL
FM
GND
SW1
SW2
MW
T302
MW ANT.
L-CH
JT01
VIDEO/AUX
INPUT
JT02
LINE
OUT
FROM CD UNIT
TAPE1 CrO2
TAPE2 CrO
SWE7/SWE8
TAPE2 SIDE A FP/
SIDE B FP
TAPE1 PLAY
SOLENOID
TAPE2 PLAY
TAPE 1
RECORD/PLAYBACK
TAPE 2
R-CH
R-CHL-CH
MM1
TAPE MOTOR
M
PHM1/PHM2
SWE2
SWE5
2
SWE1
SOL1/2
SWE4
PLAYBACK HEAD
L-CH
R-CH
HEAD
L-CH
R-CH
ERASE
HEAD
BFT01
231
MW OSC.
T306
+B6
P.B
VR101
VR102
+B6
QM02
AC BIAS
BIAS
AJDUST
NJM4558MF
LINE AMP
MOTOR
DRIVER
QM03
QM04
DRIVER
HI SPEED
Q103 Q105
Q104 Q106
ICT01
P.B
REC/PBREC
OUT
Q109
Q110
L
R
7
DRIVER
Q139
Q140
1
FM FRONT END
5
SW1/SW2
ANT.
T303
T304
+B7
8
5
31
4
–B6
QM01 QM08
SWITCHING
QM20
QM22
POP REDUCE
Q107
Q108
Q111
Q128
L104
BIAS OSC.
ICT01
TA7358AP
38
FM
RF
FM
LT01
IN
L
R
Q308
Q309
L(T1)
R(T1)
L(T2)
R(T2)
L NF
R NF
L REC
R REC
REF
+B7
OSC
LT02
SW1/SW2
OSC.
T307
T308
TAPE MOTOR
HI SPEED
T1/T2 RUN PLS
T1 CrO
T2 CrO
FULL PROOF
T1 PLAY
T1/T2 SOLENOID
T2 PLAY
IC101
AN7345K
PLAYBACK&RECORD
PLAYBACK AMP
1
24
2
23
3
4
T1/T2
6
REC
9
16
14
13
NOR/
HIGH
12
Q119
HI SPEED
SWITCHING
QM21
2
2
P.B.
T1/T2
H/N
QT01
Q306
Q307
1915
Q126
6
9
7
AMP
T2 CrO2
PB-EQ
Q141
HI SPEED &
Q139
Q140
21
20
18
17
4
5
7
8
SW1 +B
SW2 +B
2
CrO
P.B
L
R
REC
L
R
L NF
R NF
T1/T2
REC
FM +B
MW +B
Q142
Q143
Q144
Q113
Q114
FM IF
TT01
FMOSC
+B7
Q360
Q361
+B7
Q362
Q501
Q502
HI SPEED & NOR
QD07
QD08
T2 CrO2
Q127
Q125
Q124
SWITCHING
FM IF
CF302
FM IF IN
VR351
FM MUTE LEVEL
X352
4.5MHz
FM
7
20
+B7
Q363
CD MUTE
T1/T2
QD06
QD09
QD10
VRD01
VRD03
VRD02
VRD04
PLAY-BACK
ADJUST
MUTING
Q121
Q122
Q153
Q147
Q154
Q148
HI SPEED
BAIS
Q126
SWITCHING
AM OSC
OUT
AM IN
1
OSC
9
+B7
Q364
REC-SENS
BAIS
+B7
T351
321
REGOUT
AFC
AM IN
LC72131
+B7
7
STEREO
AM RF IN
FM IN
IC302
43
DI
CE
PB MUTING
DOLBY
ON/OFF
2
VCC
15
GND
L
11
6
R
L
14
3
R
16
L
1
R
HA12134A
DOLBY NR
AM IF
CF352
FM MONO/STMONO/ST
1011161522
5
CL
QD01
QD02
MUTING
5
SIDE
CHAIN
BUF
SW
ICD01
AM IF
IN
PLL CONTROLLER
VR151
VR152
ADJUST
6
DO
BIAS
VREF
4
IN
GND
IF
OUT
REGURATER
IF IN
2113
DOLBY
REC/PLAY
12
9
8
10
7
DET
4
13
FM IF
VOLTAGE
+B7
1712
L
R
+B7
CF351
985
VCC
Q361
+12V
8
SWITCHING
+B7
X351
456KHz
17
QD03
L
1
12
R
8
16
18
OUT
IN
IC303
LA1832
FM IF DET./FM MPX./AM IF
SD
15161412101321222324
RL
MUTING
Q353
Q354
L251
MPX.FILTER
L252
L
CD
R
L
TAPE
R
L
TUNER
R
L
AUX
R
ICD03
BA3311L
REC./P.B.
EQUALIZER
AMP.
2
ALC
OUT
IN
5
9
3
NF
VCC
11
GND
6
7
BU4066BC
SRS MODE
SELECTOR
5
6
IC502/IC503/IC504
2
+B8
8
6
7
55
57
53
59
54
58
51
61
L
R
L
R
L
R
R
32
10
9
1
IC452
12
Q152
Q461
NJM4558MF
OPE AMP.
B.P.F
IC502(1/2)
IN
VrefRVrefLVref
R
17
18
L
L
11
R
4
8
L
13
1
4
7
8
6
SPE IN
3014
AUDIO PROCE
SRS5250AS
1
Q467
Q461
+B7
–B6
+B8
IC451
SRS
11
10
TUNER
TAPE
T1 SOL
T1 PLA
HIGH
T2 SOL
T2 PLA
IC501
LC75396
GRAPHIC E
4
LRLRL
Q463
REC
Q46
Q46
S
T
T
T
R
43442127226448
25
2
Figure 18 BLOCK DIAGRAM (2/3)
– 18 –
~
64
63
62
16
6
1
5847462322
6
30
39
13
28
28
8473715250474532
27907246188915
10
3
87
85
92
88
1
91
100
99
8
679
91
5
3
4
11
94
93
92
14
13
18
56
90
15
57
89
12
16
17
27
9596979899
100
12
5479752855596362615152538768697172
46
47
43
49
48
32
30
34
35
31
38
42
41
40
33
39
37
23
19
58
70
4
7
1
8
2
18
22
16
17
12
14
15
7
1
3
5
31
252324
17
26
5664484243441
6
5
4
24
25
10
28
27
26
4
8
98
97
96
95
29
3
2
1
RELAY
PROT
F856
T 2.5A L 250V
SW851
VOLTAGE
SELECTOR
PB-EQ
REC-EQ
VOLTAGE
REGULATER
VOLTAGE
REGULATER
TA-BIAS
M901
LED707~LED709
LED721~LED724
SW701~SW713
SW717~SW727
SW732~SW734
SW739~SW744
+B6
LED701~LED706
LED714~LED718
LED725,LED726
F1
F2
RX701
REMOTE
CONTROL
SENSOR
~
~
~
~
DATA1
+B2
Q702~Q711
JOG DIAL
SW702
CAM_SW1
CAM_SW2
TRY_SW1
CAM_SW4
CAM_SW3
TRY_SW2
TRY_SW3
TRY_SW4
DATA1
+B4 (+4V BACK UP)
RESET IN
RESET
Q201
+B4
SP RELAY
FAN
PROT
S-MUTE
POWER
F820
T500mA L 250V
SO901
SPEAKER
TERMINALS
F855
T2A L 250V
F854
T5A L 250V
230~240V
AC POWER
SUPPLY CORD
AC 110/127/220
230–240V
50/60HZ