Sharp CD-C421H User manual

– 1 –
CD-C421H / C411H
SERVICE MANUAL
No. S5834CDC421H/
CONTENTS Page
IMPORTANT SERVICE NOTES (For U.K. Only) ............................................................................................................. 2
SPECIFICATIONS ............................................................................................................................................................ 3
NAMES OF PARTS .......................................................................................................................................................... 4
OPERATION MANUAL..................................................................................................................................................... 6
DISASSEMBLY..................................................................................................................................................................7
REMOVING AND REINSTALLING THE MAIN PARTS.................................................................................................... 9
ADJUSTMENT................................................................................................................................................................ 10
NOTES ON SCHEMATIC DIAGRAM ............................................................................................................................. 16
BLOCK DIAGRAM .......................................................................................................................................................... 17
WAVEFORMS OF CD CIRCUIT..................................................................................................................................... 20
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD.............................................................................................21
TROUBLESHOOTING (CD CHANGER CONTROL / CD SECTION) ............................................................................ 38
FUNCTION TABLE OF IC .............................................................................................................................................. 42
FL DISPLAY.....................................................................................................................................................................50
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.K. Only)
Illustration: CD-C421H
SHARP CORPORATION
CP-C421H and SURROUND
(GBOXS00018AWZZ)Constitute CD-C421H.
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
Illustration: CD-C411H
CD-C421H
CD-C411H
CP-C411H Constitute CD-C411H.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-C421H / C411H
– 2 –
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND TERMINAL
OF PHONO TERMINAL
PROBE
AC
UNIT
WITHSTANDING
VOLTAGE TESTER
+
-
OUT
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
forthismodelisspecifiedtobelowerthanClassIRequirements.
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
outerthanthelead-inposition,theLaserwilllightforseveral
seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and
replacementservicepartshavealreadybeenadjustedprior
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-Useofcontrolsoradjustments,orperformance
of procedures other than those specified herein may result
in hazardous radiation exposure.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
VAROITUS!LAITTEENKÄYTTÄMINENMUULLAKUINTÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA
ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅANNAT SÄTTÄN I
DENNA BRUKSANVISNING SPECIFICERAS.
KANANVÄNDAREN UTSÄTTAS FÖR OSYNLIG
LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN FÖR
LASERKLASS 1.
Beforereturningtheunittothe customer after completion of a
repairor adjustmentitisnecessaryforthefollowing withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
Set name set value
Withstanding Voltage Tester
Test voltage 4,240 VPEAK
3,000 VRMS
Set time 6 secs
Set current(Cutoff current) 4 mA
Unit
Judgment
OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzor sounds.
IMPORTANT SERVICE NOTES (U.K. Only)
(FOR U.K.)
(FOR GERMANY)
LASER KLASSE 1
(Illustration:CD-C421H) LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
(Illustration:CD-C421H)
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.
(Illustration:CD-C421H)
CHASSIS SCREW
OF CHASSIS
SCREW

– 3 –
CD-C421H / C411H
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
Specifications for this model are subject to change
without prior notice.
CD-C421H
●General
Power source: AC 230 V, 50 Hz
Power consumption: 47 W
Dimensions: Width; 270 mm (10-5/8")
Height; 303 mm (11-13/16")
Depth; 341 mm (13-7/16")
Weight: 4.8 kg (10.6 lbs.)
●Amplifier section
Output power:
(For Germany) PMPO; 120 W (total)
MPO; 60 W (30 W + 30 W)
(DIN 45 324)
RMS; 40 W (20 W + 20 W)
(DIN 45 324)
RMS; 28 W (14 W + 14 W)
(DIN 45 500)
Output power:
(For U.K.) MPO; 60 W (30 W + 30 W)
(10% T.H.D.)
RMS; 40 W (20 W + 20 W)
(10% T.H.D.)
RMS; 28 W (14 W + 14 W)
(0.9% T.H.D.)
Output terminals: Front speakers; 5.4 ohms
Surround speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Input terminals: Video/Auxiliary (audio signal);
245 mV/47 kohms
●Tuner section
Frequency range: FM; 87.5-108 MHz
AM; 522-1,620 kHz
●Cassette deck section
Frequency
response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Wow and flutter: 0.2 % (DIN 45 511)
●Compact disc player section
Type: 3-disc multi-play compact disc player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
●Front speaker section
Type: 2-way [10 cm (4") woofer and 5 cm
(2") tweeter]
Maximum input power:30 W
Impedance: 5.4 ohms
Dimensions: Width; 180 mm (7-1/8")
Height; 300 mm (11-13/16")
Depth; 204 mm (8-1/16")
Weight: 2.1 kg (4.6 lbs.)/each
●Surround speaker section
Type: 10 cm (4") full-range speaker
Maximum input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 170 mm (6-11/16")
Height; 120 mm (4-3/4")
Depth; 175 mm (6-7/8")
Weight: 0.6 kg (1.3 lbs.)/each
●General
Power source: AC 230 V, 50 Hz
Power consumption: 32 W
Dimensions: Width; 270 mm (10-5/8")
Height; 303 mm (11-15/16")
Depth; 341 mm (13-7/16")
Weight: 4.8 kg (10.5 lbs.)
●Amplifier section
Output power:
(For Germany) PMPO; 66 W (total)
MPO; 33 W
(16.5 W + 16.5 W)
(DIN 45 324)
RMS; 20 W (10 W + 10 W)
(DIN 45 324)
RMS; 16 W (8 W + 8 W)
(DIN 45 500)
Output terminals: Speakers; 8 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Input terminals: Video/Auxiliary (audio signal);
245 mV/47 kohms
●Tuner section
Frequency range: FM; 87.5-108 MHz
AM; 522-1,620 kHz
●Cassette deck section
Frequency
response: 50-14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Wow and flutter:
(For Germany)
0.2 % (DIN 45 511)
0.15 % (WRMS)
●Compact disc player section
Type: 3-disc multi-play compact disc player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
●Speaker section
Type: 100 mm (4") full-range speaker
Maximum input power: 20 W
Impedance: 8 ohms
Dimensions: Width; 180 mm (7-1/8")
Height; 300 mm (11-13/16")
Depth; 204 mm (8-1/16")
Weight: 2.1 kg (4.6 lbs.)/each
Output power:
(For U.K.) MPO; 33 W (16.5 W + 16.5 W)
(10% T.H.D.)
RMS; 20 W (10 W + 10 W)
(10% T.H.D.)
RMS; 16 W (8 W + 8 W)
(0.9% T.H.D.)
(For U.K.)
CD-C411H

CD-C421H / C411H
– 4 –
NAMES OF PARTS
Front Panel
1. Disc Tray
2. Disc Skip Button
3. Open/Close Button:
4. CD Play Indicator:
5. CD Repeat Indicator:
6. CD Pause Indicator:
7. Disc Number Indicators
8. RDS Indicator
9. EON Indicator
10. Traffic Announcement Indicator: TA
11. Traffic Programme Indicator:TP
12. Traffic Information Indicator: TI
13. Programme Type Indicator: PTY
14. Function/CD Track/CD Counter/Frequency/Preset
Channel/Volume/Timer/Sleep Time Indicator
15. Sleep Indicator
16. FM Stereo Mode Indicator: ST
17. FM Stereo Indicator:
18. Extra Bass Indicator: X-BASS
19. Memory Indicator
20. Tape Play indicator:
21. Record indicator
22. Timer Record Indicator
23. Timer Play Indicator
24. On/Stand-by Button
25. Programme Type/Traffic Information Search Button
26. EON Button
27. Memory/Set Button
28. Record Pause Button:
29. Extra Bass/Equalizer Mode Button
30. Function Selector Buttons
31. ASPM Button
32. Display Mode Selector Button
33. Clock Button
34. Timer/Sleep Button
35. (CD) Track Down/Review Button:
(TUNER) Preset Down button:
36. Stop Button:
37. Play/Repeat Button:
38. (CD) Track Up/Cue Button:
(TUNER) Preset Up button:
39. Random/Demo Button
40. Volume Up/Down Buttons:
41. Tuning and Time Up/Down Buttons:
42. Headphone Socket
43. (TAPE1) Cassette Compartment
44. (TAPE2) Cassette Compartment
Rear Panel
1. Speaker Terminals
2. AC Power Input Socket
3. Video/Auxiliary (Audio Signal) Input Sockets
4. FM'75 Ohms Aerial Socket
5. AM Loop Aerial Socket
CD-C421H/C411H 123
123
X-BASS
kHz
MHz
RDS
EON TA PTY TP
SLEEPST
MEMORY
REC
TI
456 7 8
910 11
12
13
15
16
17
18
19
20 2122
14
23
24 25 2627 28 29
30
31
32
33 34 35 36 37 38 39
40
41
42
43 44
1
2
3
4
5
(CD-C421H)(CD-C411H)

– 5 –
CD-C421H / C411H
10
11
7
8
6
9
Speaker Section
Front Speaker
6. Tweeter
7. Woofer
8. Bass Reflex Duct
9. Speaker Wire
6. Full-Range Speaker
7. Bass Reflex Duct
8. Speaker Wire
Remote Control
1. Remote Control Transmitter LED
CD control section
2. Disc Number Select Buttons
3. Track Down/Review Button:
4. Track Up/Cue Button:
5. Disc Skip Button
6. Play/Repeat Button:
7. Stop Button:
8. Memory Button
9. Clear Button
10. Random Button
11. Pause Button:
Tuner control section
12. Programme Type/Traffic Information Search Button
13. Preset Up/Down Buttons:
Tape control section
14. (TAPE 1/2) Stop Button:
15. (TAPE 1) Play Button:
16. (TAPE 2) Record Pause Button:
17. (TAPE 2) Play Button:
18. (TAPE 2) Rewind Button:
19. (TAPE 2) Fast Forward Button:
20. Function Selector Buttons
21. Extra Bass/Equalizer Mode Button
22. Onn/Stand-by Button
23. Volume Up/Down Buttons:
CD-C421H/C411H
CP-C421H
GBOXS00018AWZZ
CP-C421H
1
2
3
4
5
6
7
11
13
10
98
15
14
16
20
23
21
19
18
17
22
12
CP-C411H
Surround Speaker
10. Full-Range Speaker
11. Speaker Wire 7
6
8
CP-C411H
Surround Speaker (GBOXS00018AWZZ)
[CD-C421H Only]
[CD-C421H Only]

CD-C421H / C411H
– 6 –
OPERATION MANUAL
SETTING THE CLOCK
(Main unit operation)
1Press the ON/STAND-BY button to enter the stand-by mode. 2Press the CLOCK button. 3Within 5 seconds, press the MEMORY/SET button. 4Press the TUNING/TIME ( or ) button to select the time
display mode.
"0:00" →The 24-hour display will appear. (0:00 - 23:59) "AM 12:00" →The 12-hour display will appear. (AM 12:00 - PM 11:59) "AM 0:00" →The 12-hour display will appear. (AM 0:00 - PM 11:59)
●Note that this can only be set when the unit is first installed
or it has been reset (see page 23).
5Press the MEMORY/SET button. 6Press the TUNING/TIME ( or ) button to adjust the hour. ●Press the TUNING/TIME ( or ) button once to advance
the time by 1 hour. Hold it down to advance continuously.
●When the 12-hour display is selected, "AM" will change auto-
matically to "PM".
7Press the MEMORY/SET button. 8Press the TUNING/TIME ( or ) button to adjust the
minutes.
●Press the TUNING/TIME ( or ) button once to advance
the time by 1 minute. Hold it down to change the time in 5 minute intervals.
●The hour setting will not advance even if minutes advance from
"59" to "00".
9Press the MEMORY/SET button. ●The clock starts operating from "0" seconds. (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 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.
ON/ STAND-BY CLOCK MEMORY/ SET
TUNING/ TIME ( )
AM 0:00AM 12:000:00
2 3
4
7
6 5
8 9If 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:
① Press the MEMORY/SET button. ② Perform steps 6 - 9 above.
When the unit is on:
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 23.
② Perform steps 1 - 9 above.
In this example, the clock is set for the 24-hour (0:00) system.
RESETTING THE MICROCOMPUTER
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
While pressing down the VOLUME button and the oniy TUNING/TIME button, hold down the ON/STAND-BY button for at least 1 second.
1,2
2
2
Caution: ●The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD presets.

– 7 –
CD-C421H / C411H
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.Takeoffnylon bands or wire holderswheretheyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besureto rearrange the leads wheretheywere
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x2 7-1
(Left/right) 2. Screw ..................... (B2) x4
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook...................... (C1) x3
3. Hook...................... (C2) x2
4. Socket ................... (C3) x4
4 Back Board 1. Screw .................... (D1) x6 7-2
5 Tuner PWB 1. Screw .................... (E1) x3 8-1
2. Socket ................... (E2) x1
6 Switch PWB/ 1. Screw .................... (F1) x6 8-1.2
Display PWB/ 2. Screw .................... (F2) x2
Main PWB/ 3. Socket ................... (F3) x4
7 Front Panel 1. Screw .................... (G1) x3 8-2
2. Hook...................... (G2) x2
8 Tape Mechanism 1. Open the cassette holder. 8-2
2. Screw .................... (H1) x6
9 Turntable 1. Screw .................... (J1) x1 8-3
2. Cover .................... (J2) x1
10 Disc Tray 1. Screw .................... (K1) x2 8-3
2. Guide .................... (K2) x2
11 CD Changer 1. Screw .................... (L1) x4 8-4
Mechanism
12 CD Mechanism 1. Screw .................... (M1) x1 8-4
STEP REMOVAL PROCEDURE FIGURE
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 < 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 7-1
CD-C421H/C411H
CD-C421H/C411H
LOCK
LEVER
< A >
CD Tray Cover
CD Player Unit
( D1 ) x6
ø3 x8mm
Hook
( C1) x3
( C2 ) x1
( C3 ) x4
Back Board

Main PWB
Front Panel
1
1
2
A
Pull
(C2) x1
( B1 ) x1
ø3 x10mm
( B2 ) x2
ø3 x12mm
( B2 ) x2
ø3 x12mm
( B1 ) x1
ø3 x10mm
Top Cabinet
Side Panel
(Right)
Back Board

Side Panel
(Left)
( A1 ) x2
ø3 x12mm
( A1 ) x2
ø3 x12mm

CD-C421H / C411H
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Figure 8-4
Be careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
( F3 ) x2

( F3 ) x1

( E2 ) x1

( F1 ) x1
ø3 x 8mm
( F2 ) x1
ø3 x10mm
( F1 ) x3
ø3 x10mm
( F2 ) x1
ø3 x10mm
( E1 ) x3
ø3 x10mm
( F1 ) x2
ø3 x10mm
Main PWB
Tuner PWB
Display
PWB
Switch PWB
Front Panel
( F3 ) x1

( G1 ) x3
ø3x10mm

( H1 ) x6
ø3x10mm

(G2 ) x1
(G2 ) x1
Tape
Mechanism
Cassette
Holder
Front Panel
Power PWB
Open
( K1 ) x1
ø2 x 4mm
( K1 ) x1
ø2 x 4mm
( J1 ) x1
ø3 x10mm
Turntable
Disc Tray
( J2 ) x1
( K2 ) x1
( K2 ) x1
CD Player Unit
Washer
( L1 ) x4
ø2.6 x 5mm
(M1 ) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

– 9 –
CD-C421H / C411H
1 Front Speaker 1. Net Frame .............. (A1) x1 9-1
3. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
4. Screw ..................... (A4) x4
Figure 9-1
CP-C411HCP-C421H
STEP REMOVAL PROCEDURE FIGURE
Screwdriver
Woofer
Tweeter
Net Frame
( A1 ) x1 ( A3 ) x4
ø4x14mm
( A4 ) x4
ø4x14mm
Duct Panel
( A2 ) x1
Notes:
The Surround speakers (CD-C421H only) can be easily
disassembled.Therefore the disassembling method is not
discribed.Fordetailsrefertothedisassemblingdrawinginthe
Parts Guide.
Figure 9-4
Figure 9-3
How to remove the pickup (See Fig. 9-4)
1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2)
x 1 pcs.
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4) x 1 pc.
3. Remove the pickup.
REMOVINGAND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3, 13 and 14 of the disassembly method
to remove the CD mechanism.
How to remove the loading motor
(See Fig. 9-3)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
( A1 ) x2
ø2.6 x5mm
Loading / Up
/ Down Motor
Motor
PWB
( B1 ) x2
ø2.6 x6mm
Shaft
( B2 ) x1
Stop Washer
( B3 ) x1
Gear
( B4 ) x1
CD Mechanism
Pickup
Figure 9-2
1 Front Speaker 1. Net Frame .............. (A1) x1 9-2
3. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
STEP REMOVAL PROCEDURE FIGURE
( A3 ) x4
ø3 x34mm
Screwdriver
Woofer
Net Frame 
( A1 ) x1
Duct Panel
( A2 ) x1

CD-C421H / C411H
– 10 –
ADJUSTMENT
Figure 10 ADJUSTMENT POINTS
TUNER SECTION
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,620 kHz T351 *1
AM Band — 522 kHz (fL): T306 *2
Coverage 1.1 ± 0.1 V
AM 990 kHz 990 kHz (fL): T302 *1
Tracking
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
• FM
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
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz 98.00 MHz VR351* Input: Antenna
(25 dBµV) Output: Speaker
Terminal
MECHANISM SECTION
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 60 to 120 g.cm
Rewind: TW-2231 — 60 to 120 g.cm
Specified
Value
Adjusting
Point Instrument Connection
Test Tape
Normal MTT-111 Volume in 3,000 ± Speaker
speed motor. 30 Hz terminal
(MM1) (Load
resistance:
8 ohms)
Specified Value
Tape 1
•Tape Speed
TAPE MECHANISM
MM 1
Motor
Volume in motor
TUNER PWB
TP301
CNP301
SO301
ANTENNA
TERMINAL
FE301
TP302
R357
T351 T306
T302
VR351
AM IF FM MUTE
LEVEL
AM BAND
COVERAGE AM  TRACKING

– 11 –
CD-C421H / C411H
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST
Figure 11-2 Figure 11-3
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
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.
• Automatic adjustment item
1. Focus offset (Fig. 11-2)
2. Tracking offset (Fig. 11-3)
3. E/F balance (tracking error balance) (Fig. 11-4)
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.
CD SECTION Figure 11-1
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
• 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
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 11-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.
<MEMORY>
LASER ON
<PLAY> key input Press <STOP> key. Stop 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
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY STOP
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
Figure 11-4
IL is not performed.
<STOP>
1 2 3

CD-C421H / C411H
– 12 –
DISPLAY
MODE
Note:
When the unit is in the EON stand-by mode and a pro-
grammeis selected,theunit willdisplay"TI"insteadof "TP"or
"TA".
RDS (Radio Data System) OPERATION
Receiving FM Stations with RDS (Radio Data
System)
RDSisa broadcastingservicewhich agrowingnumberof FM
stationsarenowproviding.ItallowstheseFMstationstosend
additionalsignalsalongwiththeirregularprogrammesignals.
For example, the stations send their station names, and
information about what type of programme they broadcast,
such as sports or music, etc.
When tuned to an FM station which provide the RDS service,
the RDS will appear, the station frequency (and then the
station name if sent) is displayed.
The TP (Traffic Programme) will appear on the display when
the received broadcast carries traffic annoucements, and the
TA (Traffic Annoucement) will appear whilst a traffic
announcement is being received. EON will appear whilst the
EON (Enhanced Other Networks information) data is being
broadcast.
Note:
When the TP and TA appear at the same time, an announce-
ment is being made.
When only the TA appears, an announcement is not being
made. (See page 15.)
Information Provided by RDS
With the CD-C421/C411H, you can display two types of RDS
service. To show them in the display, press the DISPLAY
MODE button.
Each time you press the DISPLAY MODE button, the display
will change to show the following information.
PS (Programme Service): Station names commonly
known will be diaplayed.
"NOPS"appearsifnosignal
is being sent.
PTY (Progamme Type): Programme type will be
diplayed.
"NO PTY" appears if no
signal is being sent.
Station Frequency: Station frequencies.
DescriptionsofthePTY(ProgrammeType)codes,TP(Traffic
Programme) and TA (Traffic Announcement)
Eith the CD-C421H/C411H, you can search for and receive
the forrowing PTY, TP and TA signals.
NEWS: News
AFFAIRS: Topical programme expanding on the
current news or affairs
INFO: Programmes on medical service, weather
forecast, etc.
EDUCATE: Educational programmes
DRAMA: Radio plays
CULTURE: Programmesonnationalorregionalculture.
SCIENCE: Programmes on national sciences and
technology.
VARIED: Other programmes like comedies or
ceremonies
POP M: Pop music
ROCK M: Rock music
M.O.R. M: Middle-of-the-road music (usually called
"easy listening")
LIGHT M: Light music
CLASSICS: Classics
OTHER M: Other music
ALARM: Emergency broadcasts
NONE: no Programme type (receive only)
TP: Broadcasts which carry traffic
announcements
TA: Trafficannouncementsarebeingbroadcast
at present.
Figure 12-1

– 13 –
CD-C421H / C411H
No
ASPM, summary operation
Hold down the ASPM button for 3 more second.
“ASPM” blinks in the display. Preset CH memory full over? No operate. After displayed “END”. Return to
previous station.
SD (TUNE) DET out OK? If count 1st OK? If count 2nd OK? RDS signal or not? PI—identify
Comparing PI cord same or not? between current receiving PI and before PI which is already memorized by ASPM on this time.
Comparing freg. same or not? between current receiving frequency and (already) previously memorized frequency.
Memorized to the lowest vacant preset channel.
Preset CH memory become full over?
Begin to ASPM SCAN from the next CH-SPAN again.
Repeat and continue with same format ASPM operation untill 108 MHz. After reached 108 MHz, displayed the TTL quantity of memorized stations. And return to the previous receiving freq. automatically. Displayed the TTL quantity of memo- rized stations by ASPM operation on this time. And return to the previous receiving freq. automatically.
Yes
No Yes Yes Yes Yes
No
No
No
No No No Effect
Pass
No effect
Pass
No effect
Pass
No effect
Pass
No effect
Yes
No
Yes
Compare the field strength of current receiving signal. Is receiving signal stronger than signal which has same PI cord and is already memorized to preset memory ahead of this receiving time?
Yes No effect
No No effect
Comparing freg. same or not? Between current receiving frequency and (already) previously memorized frequency.
Yes Memorized to the lowest
vacant preset channel.
Yes No effect
Begin to scan start 87.50 → 108.00 MHz

CD-C421H / C411H
– 14 –
4. No adjust type (None adjusting circuit.)
5. Added EON button.
6. Need to change RDS logo due to add EON feature.
7. Added EON—TI, EON—PTY function.
3. Summary of CD-C421H/C411H RDS—EON operation
EON—PTY: Select and set the desired “PTY” → stand-by → switch to ON(other network) Station at the
start of desired PTY automatically → stay and listen to PTY of ON station → switch back to TN(This net) station
automatically at the end of PTY(ON) i.e. after changing to another PTY(exceptAFFAIRS) or cancelling to receive PTY of ON
station midway.
EON—TI: Select and set the “TI” → stand-by → switch to ON station at the start of traffic announcement automati
cally → stay and listen to TA of ON station → switch back to TN station autmatically at the end of TA(ON).
ie after TA(ON) is over or cancelled to receive TA of ON station midway.
When switching TN → ON station.
In case of exist 2 more stations having the desired(specified) “PTY” or “TI”, the receiver will select and switch toON station
comparing field strength at the same time. But when the frequency of ON station exists in the preset-memory, then reciver
switches straight to that ON station(CH), without comparing field strength so can make a quick switching from TN—ON sta
tion. Preset memory takes priority of switching TN—ON station.
therefore ASPM is usefull not only for PTY search but also for rapid EON switching.Anyway CD-C421/C411H EON is basi
cally stand-by and receiving method, along with the Guidelines for EON implementation.
•ASPM SCAN: 87.50MHz →108.00 MHz.
• Only RDS signal is memorized byASPM because RDS signal has PI code and is suitable and convenient for ASPM operation.
ASPM
Comparing field strength, only one strongest RDS station is memorized of all stations (repeater relay stations) that have same
PI code.
Same PI code — freq: different
(AF’S)
PS: same
PTY: same
Each PI has AF’S list by individually.
Exa: P1 has f1, f2, f3(same PTY).
P2 has f4, f5(same PTY).
[For example] Pickup and memorized to preset CH.
f 1
f 2 f 3
P 1 (PI cord)
PS 1 (Station Name)
f 5 f 4
P 2
PS 2
f 6
f 7 f 8
P 3
PS 3
f 9 f 10
f 11 f 12 f13
P 4
PS 4
Select signals (f1, f5, f7, f10) are memorized in the preset memory by ASPM.
• If tentative - ASPM operation is repeated intententionally, never memorized (over write) at the same frequecy.
1st time ASPM → strongest stations of each pi are memorized.
ASPM is not only very usefull for PTY search, but also EON operation.
2nd time ASPM →2nd strong stations of each pi are memorized and so on.
PTY search function is equal to FM band search function as a result.
1. Introduction of RDS for CD-C421H/C411H
CD-C421H/C411H RDS function is equal to adding EON feature to the current CD-C75H RDS.
EON feature is EON—PTY and EON—TI.
Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.
NEWS, AFFAIRS, INFO, ALARM, TI (TTL 17 kinds)
EON—PTY EON—TI
Can select and stand-by Can select and stand-by
EON—PTY and EON—TI are basically stand-by →receive the desired program of ON station.
2.The difference point from current CD-C75H RDS. (CD-C75H — CD-C421H/C411H)
1. PTY item: added TA.TTL 18 kind.
2. Each “TP”, “TA” ind. light up or go out individually.
“TA” ind. doesn’t light up on current model, CD-C75H due to none EON—TI.
3. Added 3 indicators(in FL) due to adding EON feature.
EON: Lights up only during receiving EON data (14A).
TI: During EON-TI stand-by →Light up
During receiving ON station. →blink.
PTY: During EON-PTY stanb-by →Light up
During receiving ON station. →blink.
---
---
↑↑

– 15 –
CD-C421H / C411H
EON summary notice for reference
1. EON-TI/PTY EON stand-by can be set, only when EON ind. lights up.
While EON ind. goes out (NO EON STATION), EON stand-by can't be set.
If the EON button is pressed, then “NO EON” is indication the display.
2. EON-TI/PTY Even if switch back ON→TN station continue to keep EON stand-by.
3. EON-TI Don’t switch TN→ON during TN broadcast TA. (same item)
4. EON-TI/PTY
EON can be cancelled during receiving ON station by pressing EON button if necessary and
switch back ON
→ TN.
5. EON-TI/PTY EON stand-by is perfectly cancelled (cleared) by pressing EON button 2 times during stand-by or
powerOFF or Tun Up/ Down or change band or recall pre-set CH.
6. EON-TI/PTY After setting EON stand-by, stand-by items can be confirmed by pressing EON button one time.
7. EON-TI/PTY EON button function: •EON setting
•Confirm stand-by items
•Cancel (ON→TN)
•EON clear cancel (2 times)
8. EON-TI/PTY After setting EON-TI and EON-PTY stand-by, if when EON data is not transmitted, EON ind goes out
and EON stand-by is automatically cancelled display “NO EON”.
9. EON-TI EON-TI stand-by can't be set. When TP=0,TA=0(TN) even if EON ind. lights up and the EON button is
pressed then “NO TI” is indication the display.
10. EON-PTY Don’t switch TN→ON during TN broadcast same specified PTY. (same item of PTY)
11. EON-TI/PTY Switch TN→ON→TN station one cycle.
Never switch TN→ON1→ON2→Other net to other net station.
12. EON-TI/PTY After switch TN→ON station. When ON station is NO RDS, NO signal, TA=OFF or different PTY items.
The receiver switch back ON→TN displaying “NO READY”.
13. During receive ON station. when ON station become to be NO RDS, NO signal, TA=ON to OFF or
different PTY item, The receiver switch back ON→TN.
14. EON-TI/PTY Switch TN→ON in case of 2 more stations exist, comparing field strength and switch to thestrongest
station, if these signals are same strength, switch to the first previous station.
If same frequency as AF'Sexists in the preset memory, then switch TN→ON (preset memory station)
straight.
In case of exist 2 more preset memories of AF’S,then switch to the preset CH which taken in EON DATA
first, also in this case no concern to field strength.
15. Even if switch TN→ON preset memory straight, that ON station is very weak signal, then search another
AF'S (ON) station comparing field strength and switch to the strongest station as a result. Of all atations
of AF'S are very weak or no good condition, then, switch back ON→TN automatically display "NO
READY".
16. EON-TI/PTY No linkage volume, power ON/OFF, and switch function.
Traffic Programme code
(TP) Traffic Announcement code
(TA) Applications
OFF OFF This programme does notcarry traffic announcements nor does
it refer, via EON, to a programme that does.
OFF ON This programmecarries EON information about another
programme which gives traffic information.
ON OFF This programme carries traffic announcements but none are
being broadcast at present and may also carry EON information
about other traffic announcements.
ON ON A traffic announcement is being broadcast on this programme at
present.

CD-C421H / C411H
– 16 –
SW713 TUNING UP/TIME ON—OFF
SW714 RANDAM DEMO ON—OFF
SW715 VOLUME UP ON—OFF
SW716 STOP ON—OFF
SW717 FWD ON—OFF
SW718 FF/PRESET UP ON—OFF
SW719 MEMORY SET ON—OFF
SW720 TUNING DOWN/TIME ON—OFF
SW721 VOLUME DOWN ON—OFF
SW722 X-BASS EQUALIZER ON—OFF
SW724 REV/PRESET DOWN ON—OFF
SW725 OPEN/CLOSE ON—OFF
SW726 DISC SKIP ON—OFF
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S ON—OFF
SWM 5 CAM ON—OFF
SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 ON/STAND-BY ON—OFF
SW702 CLOCK ON—OFF
SW703 TIMER/SLEEP ON—OFF
SW704 CD ON—OFF
SW705 TUNER/BAND ON—OFF
SW706 TAPE ON—OFF
SW707 VIDEO/AUX ON—OFF
SW708 EON ON—OFF
SW709 PTY, /TI SEARCH ON—OFF
SW710 ASPM ON—OFF
SW711 DISPLAY MODE ON—OFF
SW712 REC PAUSE ON—OFF
•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.
•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.
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
electrolyticcapacitor,theexpression“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.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
Figure 16 TYPES OF TRANSISTOR AND LED
2SC380 O
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTA1271 Y
KTC3199 GR
KTC3203 Y
2SB561C
2SC1845 F
KTA1273 Y
E
(1)C (2)B (3)
FRONT 
VIEW
B
(3)C (2)E (1)
FRONT 
VIEW
FRONT VIEW
KV1236Z23F

– 17 –
CD-C421H / C411H
Figure 17 BLOCK DIAGRAM (1/3)
1
2
3
4
14
5
98
6
7
17 20
12
13
24 25 30
31
3222
10 11
27 26 28 29
PU-IN SW
XL1
XIN
LDO
FIN2 JP–
CV+
SLC
SLI
FIN1 E F
TO
FD
SPO
SP
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
6
PICKUP IN
SW4
FOCUS COIL
TRACKING COIL
M1
DISC
MOTOR
M
M
M2
SLED
MOTOR
PICKUP UNIT
9
IC2
LC78622K
SERVO/SIGNAL
CONTROL
+B1
IC5
M56748FP
DRIVER
IC1
LA9241M
SERVO AMP.
6
1
95
+B1
+B1
+12V
+5V
( TO IC401 )
RES. CQCK. COIN SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE Q93
Q91
SL+. SL–. DRF
7
3
9
8
7
6
5
4
3
2
1
GND (D) MECHA UP GND (D) DISK NO. OPEN/CLOSE GND (D) M– M+ GND (M) SOL
9
8
7
6
5
4
3
2
1
CNP10
M
62 64 56 55 45 3623 43
37
38 39
40 24 25
10 10
265853
10 12 20
32 40 43 44
5352515431302923271615
4144
Q1
TO MAIN SECTION
IC91
TA7291
LODING MOTOR
DRIVER
XOUT
EFMO EFMIN CLV+ JP–
CONT2 CONT1
RCHO
RVSS
LVSS
LCHO
VVDD
VDD
LVDD
RVDD
XVDD
SW1 OPEN/CLOSE
SW2 MECHA UP SW3 DISC No.
M3 LOADING
SOLM2 SOLENOID
TO MAIN(IC601) &  DISPLAY SECTION
CNS10
+B5

CD-C421H / C411H
– 18 –
Figure 18 BLOCK DIAGRAM (2/3)
43
22
7
37
40
41
2
8
9
10
11
12
13
19
21
22
23
31
67
5
6
7
2
15 14
20
21
23 22 13
12
45
1
3
7
6
8
17
15
14
11 12
16
18
12
10
13
6
13
10
7
21
22
23
24
20
3
2917
98
5
42
7
5
43 6
21
1
20 11
15 16
1
2
ICT21
LC72720
RDS
VDDA VSSA
AM ANT. AM OSC.
L341
BALUN
X352
4.5MHz
IC302
LC72131
PLL(TUNER)
FM IF DET/FM MPX/AM IF
IF
OUT
IC303
LA1832
+B4 CF351 X351
+B4
MPX
PHASE Q361
SO301
ANTENNA
TERMINAL
AM
ANTENNA
+B4 CD RES
T1 RUN
T2 RUN
TACUM SW
AFP
T1 RUN
T2 RUN
MECHA STOP
FOOL PROOF
CD SL–
CD SL+
CD CQCK
CD COIN
CD SQOUT
CD WRQ
CD RWC
CD PUIN
CD DRF.
SM
SM
L354 LOW PASS
FILTER
TUNER MUTE
SD
VOLTAGE
REGURATER
+B4
+5V
QT21
VF2
(AC)
FL701
TA MOT SW
TA SOL
VSSD
VDDD
X IN
X OUT
MPX IN
AMP.
FM +B
DO
CL
DI
CE
XT21
4.332MHz
XT21
VT
T306T302
CF302
DO
CE
CLDI
CF301
FM FRONT END
FE301
Q360
Q371
Q602
Q601
MUTING
MPX
VCO
CUT
RL
Q353
Q354
MPX
IN
FM/AM
OUT
IF IN
SD
FM MONO/ST MONO/ST
AM RF IN
AFC
IN
OUT
VR351
FM MUTE LEVEL AM OSC
REG INOUT VCC
FM IF IN
AMP
FM IF
Q301
FM IF
FM OSC.
STEREO
AM IN
FM IN
FMOSC
T351
AM IF
GND
OSC.
FM
FM IF
AM RF
SWM4
F.A.S
SWM3
FOOL PROOF
SWM5
MM1
TAPE
MOTOR
M
SOLM1
+B5
SOLENOID
PHM1
CAM
L
SO401
AUX IN
CNP303
R
R
L-CH
R-CH
PB HEAD 1
2
3
4
L NF
L (T1)
R (T1)
L (T2)
R (T2)
R NF
4
5
13
21
24
23
18
17
10
1915
12
14
16
20
H/N
67
8
9
T1/T2
POP REDUCE
L REC
R REC R NF
REC
L NF
P.B.
REC
L-CH
R-CH
REC/PB
HEAD
ERASE
HEAD
BIAS
OCS
REF ALC
HIGH
NOR/ T1/T2
PLAYBACK&RECORD/
PLAYBACK AMP.
IC501
AN7345K
L
RP.B
R
R
L
L
L
TAPE
VIDEO
TUNER
CD
FROM CD SECTION
FROM CD SECTION
Q571
L501 Q566 Q565 BIAS
Q511

Q514
~
P.BREC
AC BIAS
Q515
Q516 Q583
Q581
Q584
Q582
T1/T2
MUTING
REC MUTE
Q575
Q576
REC/P.B.
+B4
+B4
+B4
L
R
TAPE 1
TAPE 2
R
L
SWITCHING
SWITCHING
SWITCHING
SWITCHING
TO CD SECTION
16
33
17
32
19
30
21
28
CL
SWITCHING
BIAS

– 19 –
CD-C421H / C411H
Figure 19 BLOCK DIAGRAM (3/3)
47
33
48
56
71
61
51 50 34 35
23
27
46
17
35 34 43 47
9XL701
1011
12
31
2
19 21 22
18
1615
1413
14 15 16 17 18
20
31
3348
30
8
29
52
71
54
70
72
80
1
4
6
7
5
37
865721
24 2028
8
2930
52 40
9
10
11
12
13
19
21
22
23
31
67
5
6
7
45
80 72 70 2
VF1
(AC)
~
IC701
IX0223AW
SYSTEM MICROCOMPUTER
~
~
~
Q702
+B7
+B7
SW701~SW724
KEY MATRIX
SW725,726
KEY1
KEY5
Q703
Q704
ZD701
SYS STOP
RESET
POWER REMOCON DI CLK DO CE
RX701
REMOTE
SENSOR
REMOCON
TUN SD
TUN SM
TUN MUTE
CLEAR
MAIN SO
MAIN SI
MAIN SCK
MAIN STB
CLEAR MAIN SO MAIN SI MAIN SCK
C
D RES
T1 RUN
T2 RUN
C
UM SW
AFP
CD SL–
CD SL+
D
CQCK
C
D COIN
SQOUT
C
D WRQ
C
D RWC
C
D PUIN
C
D DRF.
MAIN STB
+B3
+B7+B8
+B7+B8
MEMORY
BACK UP
–VP
–VP
Q701
FL701
IC601
IX0225AW
MAIN SYSTEM
MICROCOMPUTER
+B2
POWER
REC MUTE
REC/P.B.
TA MOT SW
TA SOL
T1/T2
BIAS
~~~
13
4
3
11
MUTE
L
R
R
L-OUT
R-OUT
92
5
12
R-IN
L-IN
7VCC
14
NF
8
+12V (DRIVER)
+12V (AUDIO)
+B5
+B4
OUT
L
R
IC961
LA4550:421H
LA4551:411H
POWER AMP.
+B4
VDD
X-BASS
VSS VREF LVREF RVREF AVSS
GRAPHIC EQUALIZER
VOLUME
58
55
R
R
L
L
L
A
PE
I
DEO
U
NER
D
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
+B2
+B3
+
–
JA961
HEADPHONES
+5V
+5V
+B1 +5V
+B6 (MECHA)
(UCOM)
+12V
CD SECTION
TO CD SECTION
IC941
VF1
–VP
VF2
IC942
IC401
LC75394E
AUDIO PROCESSOR
23
16
33
17
32
19
30
21
28
14 35 56 63 50 26 27 12 37 11 38 10 39
24 25 57
CL
DI
CE
T.F
AC 230V 50Hz
SO901
L901
CORE
PT901
POWER TRANSFORMER
AC POWER
SUPPLY CORD
VOLTAGE
REGULATOR
Q901
Q941
D909

D911 F902
T1.6A L 250V
F941
T500mA L 250V
F901
T3.15A L 250V
CD-C421H Only
~
D905 ~ D908
D901 ~ D904
ZD901
9
43
6
40
8
44
5
41
7
45
4
42
+
–
+
–
+
–
SO961
SPEAKER TERMINAL
FRONT
SPEAKERS
REAR
SPEAKERS
XL601
4.19MHZ

CD-C421H / C411H
– 20 –
WAVEFORMS OF CD CIRCUIT
3
5ms
0.50 V
IC1 20 F.E
1
5ms
5.0 V
IC1 54 DRF
STOP PLAY
FOCUS SERCH
1
3
5
4
2
6
7
8
9
10
11
3
4
5
6
7
8
9
6
7
8
10
11
12
9
6
7
8
9
12
0.5ms
1.00 V
HF
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
1
2
3
CUE
0.5ms
1.00 V
HF
1
2
3
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
REVIEW
50ms
10.0 V
JP+
CUE
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
REVIEW
50ms
10.0 V
JP+
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
PLAY
20ms
1.00 V
SPO
NORMAL DISC
TN0=01
20ms
2.00 V
CLV+
PLAY
TCD-712 (140mm)
TN0=01
50ms
1.00 V
SPO
50ms
2.00 V
CLV+
PLAY
TCD-712
5s
100mV
SLD
1
0.5s
100mV
SLD
1