CD-C612 mini component system consisting of CD-C612 (Main unit),
CP-C612 (Front speaker) and GBOXS0024AWM1 (rear speaker ).
• 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
IMPORTANT SERVICE NOTES (For U.S.A. Only) ........................................................................................................... 2
NAMES OF PARTS ........................................................................................................................................................... 3
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 14
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................18
VOLTAGE .........................................................................................................................................................................32
FUNCTION TABLE OF IC................................................................................................................................................ 38
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.S.A. Only)
SHARP CORPORATION
– 1 –
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-C612
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
IMPORTANT SERVICE NOTES (For U.S.A. Only)
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the chassis
and other metal parts in the audio product.
2. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment covers
or shields, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage
current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).
* Connect the resistor connection to all exposed metal parts
having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
VTVM
AC SCALE
1.5k ohms
10W
0.15 µ F
TO EXPOSED
METAL PARTS
All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
TEST PROBE
CONNECT TO
KNOWN EARTH
GROUND
SPECIFICATIONS
CD-C612
General
Power source:AC 120 V, 60 Hz
Power consumption:Stand-by; 0.3 W
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:0.15 % (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)
Front speaker section
CP-C612
Type:2-way type [5" (13 cm)
woofer and super tweeter]
Maximum input power:30 W
Rated input power:15 W
Impedance:5.4 ohms
Dimensions:Width; 8-11/16" (220 mm)
Height; 11-13/16" (300 mm)
Depth; 8-3/6" (213 mm)
Weight:6.5 lbs. (2.9 kg)/each
Rear speaker section
GBOXS0024AWM1
Type:4" (10 cm) full range speaker
Maximum input power:10 W
Rated input power:5 W
Impedance:16 ohms
Dimensions:Width; 6-3/4" (170 mm)
Height; 6-3/4" (170 mm)
Depth; 3-1/2" (88 mm)
Weight:1.0 lbs. (0.5 kg)/each
Specifications for this model are subject to change without
prior notice.
– 2 –
CD-C612
12
4
5
6
7
8
9
1011
15
16
12
13
14
1718
19
31
20
21
24
25
22
26
33
27
2829
30
32
23
35
34
3
■ Front panel
11. Disc Tray
12. Disc Skip Button
13. Open/Close Button
14.
Extra Bass Indicator
15.
FM Stereo Mode Indicator
16.
FM Stereo Indicator
17.
(CD) Repeat Indicator
18.
(CD) Play Indicator
19.
(CD) Pause Indicator
10.
Spectrum Analyzer/Volume Level Indicator
11.
(TAPE 2) Record Indicator
12.
(CD) Disc Number Indicators
13.
(CD/TUNER) Memory Indicator
14.
Timer Play Indicator
15.
Timer Record Indicator
16.
Sleep Indicator
CD-C612
NAMES OF PARTS
17.
(TAPE 2) Record Pause Button
18.
(CD) Track Down/Review Button
3
(TUNER) Preset Down Button
3
(TAPE 2) Rewind Button
19.
(CD) Track Up/Cue Button
3
(TUNER) Preset Up Button
3
(TAPE 2) Fast Forward Button
20.
Timer/Sleep Button
21.
Clock Button
22.
Timer Set Indicator
23.
Power Button
24.
Equalizer Mode Selector Button
25.
Dimmer Button
26.
Extra Bass/Demo Mode Button
27.
Function Selector Buttons
28.
Memory/Set Button
29.
(CD/TAPE) Stop Button
30.
(TAPE) Play Button
3
(CD) Play/Repeat Button
31.
Tuning and Time Up/Down Buttons
32.
Volume Up/Down Buttons
33.
Headphone Socket
34.
(TAPE 1) Cassette Compartment
35.
(TAPE 2) Cassette Compartment
– 3 –
CD-C612
■ Rear panel
11.
AC Power Input Socket
12.
FM/AM Loop Aerial Socket
13.
Video/Auxiliary (Audio Signal) Input Sockets
14.
Rear Speaker Terminals
15.
Front Speaker Terminals
CP-C612
■ Front speaker
11.
Super Tweeter
12.
Woofer
13.
Bass Reflex Ducts
14.
Speaker Wire
GBOXS0024AWM1
■ Rear speaker
11.
Full-Range Speaker
12.
Speaker Wire
2
1
5
4
3
1
2
4
3
1
■ Remote control
11. Remote Control Transmitter LED
● CD control section
12. Disc Number Select Buttons
13. Memory Button
14. Pause Button
15. Clear Button
16. Track Down/Review Button
17. Track Up/Cue Button
18. Disc Skip Button
19. Play/Repeat Button
10. Stop Button
11. Random Button
● Tuner control section
12. Preset Up/Down Buttons
● Tape control section
13. (TAPE 1) Play Button
14. (TAPE 2) Record Pause Button
15. (TAPE 1/2) Stop Button
16. (TAPE 2) Play Button
17. (TAPE 2) Rewind Button
18. (TAPE 2) Fast Forward Button
● Common section
19. Equalizer Mode Selector Button
20. Function Selector Buttons
21. Power Button
22. Extra Bass Button
23. Volume Up/Down Buttons
2
1
2
3
4
5
6
7
16 17 18
13 14
15
19
20
2123
22
8
9
10
11
12
– 4 –
OPERATION MANUAL
SETTING THE CLOCK
1
Press the POWER button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time
display mode.
"AM 12:00" → The 12-hour display will appear.
(AM 12:00 - PM 11:59)
"AM 0:00 " → The 12-hou r display will appear.
(AM 0:00 - PM 11:59)
"0:00" → T he 24-hour d isplay wil l appear.
(0:00 - 23:59)
● Note that this can only be set when the unit is first installed
or it has been reset (see page 17).
5
Press the MEMORY/SET button.
6
Press 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".
7
Press the MEMORY/SET button.
8
Press 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".
9
Press 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 cord 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 cord was disconnected.
CLOCK
POWER
MEMORY/
SET
TUNING/
TIME
( )
AM 12:00AM 0:000:00
2
3
4
7
6
5
8
9
If this happens, follow the procedure below to change the clock
time.
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
MICROCOMPUTER"
②
Perform steps 1 - 9 above.
(Main unit operation)
In this example, the clock is set for the 12-
hour (AM 12:00) 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 POWER button to enter the stand-by mode.
2
While pressing down the button and the but -
ton, hold down the POWER button 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.
2
1,2
CD-C612
– 5 –
CD-C612
MINI COMPONENT SYSTEM
Quick Guide/Guía rápida
CD-C612
● Remote control x 1
●
Controlador remoto x 1
● 2 “AA” batteries
●
Dos pilas “AA”
Remote Sensor
Sensor remoto
2
Preparation for use /
Preparación para su uso
1
Check the supplied accessories /
Compruebe los accesorios suministrados
● FM/AM loop antenna x 1
●
Antena de cuadro de
FM/AM x 1
● Batteries are not included.
●
Las pilas no están incluidas.
8” - 20’ (0.2m - 6m)
0,2m - 6m
■ Speaker connection
■
Conexión de los altavoces
■ Antenna connection
■
Conexión de las antenas
Rear speaker (Right)
Altavoz trasero (Derecho)
Rear speaker (Left)
Altavoz trasero (Izquierdo)
Front speaker (Right)
Altavoz delantero
(Derecho)
Front speaker (Left)
Altavoz delantero
(Izquierdo)
● AM Loop Antenna
●
Antena de cuadro
de AM
● FM Antenna
●
Antena de FM
● AC 120 V, 60 Hz
●
120 V de CA, 60 Hz
■ Turning the power on and off
■
Conexión y desconexión de la alimentación
■ Remote control
■
Controlador remoto
POWER
POWER
Red
Rojo
Red
Rojo
Wire with the
white line
Cable con la
línea blanca
Wire with the
white line
Cable con la
línea blanca
● AC power cord x 1
●
Cable de alimentación
de CA x 1
Black
Negro
15
15
3
Listening to a CD /
Audición de discos CD
4
Listening to a tape /
Audición de una cinta
5
Listening to the radio /
Audición de la radio
6
Recording from CDs /
Grabaciones de discos CD
7
Sound control /
Control del sonldo
● Label facing up
●
Etiqueta hacia arriba
■ To stop the playback
■
Para detener la reproducción
■ To stop the playback
■
Para detener la reproducción
● Load the disc to be
recorded.
●
Introduzca el disco
que va a grabar.
● CD recording
starts.
●
La grabación de
CD empieza.
■ Volume
■
Volumen
■ Extra bass (X-BASS)
■
Graves extra (X-BASS)
■ Pre-programmed equalizer
■
Ecualizador preprogramado
VOLUME
FLAT
HEAVY-1HEAVY-2
SOFT-2
SOFT-1VOCAL
■ To stop the playback
■
Para detener la reproducción
TAPE 1
TAPE 2
TAPE 2
– 6 –
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. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
11 CD Changer1. Screw ..................... (L1) x49-1
Mechanism
12 CD Mechanism1. Screw ..................... (M1) x19-1
Note 1:
How to open the changer manually. (Fig. 7-3)
1. 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.
Note 2:
1. After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
4. Hook....................... (E4) x2
2. Hook....................... (F2) x2
2. Screw...................... (G1) x6
1. Screw ..................... (H1) x18-3
2. Stabilizer ................ (J2) x1
2. Guide ..................... (K2) x2
Hook
(B2)x1
(B1)x1
ø3x10mm
(B1)x2
ø3x12mm
CD Servo
PWB
Disc Tray
CD Player
Unit
(D1)x4
ø3x10mm
CD-C612
(A1)x2
ø3x12mm
Side Panel
(Right)
(C3)x2
1
1
Lock Lever
Back Board
Hook
(C2)x1
Pull
Back Board
Top Cabinet
(B1)x2
ø3x12mm
Figure 7-1
Hook
(C1)x3
Figure 7-2
(B1)x1
ø3x10mm
Main PWB
Hook
(B2)x1
CD Tray Cover
Front Panel
CD-C612
Front Panel
(A1)x2
ø3x12mm
Side Panel
(Left)
2
Hook
(C2)x1
Pull
– 7 –
Figure 7-3
CD-C612
Headphones
PWB
(E1)x1
ø3x10mm
(E1)x1
ø3x10mm
(E3)x1
(E1)x8
(E2)x1
ø3x10mm
Main
PWB
(E3)x3
Tape
Mechanism
PWB
Switch PWB
Hook
(F2)x1
Figure 8-1
Display PWB
(E3)x1
Front Panel
Hook
(E4)x2
Hook
(F2)x1
Tape
Mechanism
(F1)x2
ø3x10mm
(E2)x1
(H2)x2
(H2)x2
(H1)x1
ø3 x10mm
CD Servo
PWB
CD Player Unit
Figure 8-3
(J1)x1
ø3 x10mm
(J2)x1
(G1)x6
ø3x10mm
Front Panel
Cassette
Holder
(Left/Right)
Open
Tape
Mechanism
Washer
Turntable
Disc Tray
(K1)x1
ø3 x10mm
(K2)x1
(K1)x1
ø3 x10mm
CD Player Unit
(K2)x1
Figure 8-4
Figure 8-2
– 8 –
CD-C612
(M1)x1
ø2.6 x10mm
CD Player Base
Shift Lever
CD Mechanism
(L1)x4
ø3 x12mm
CD Changer
Mechanism
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.
Figure 9-1
CP-C612
STEPREMOVAL
1Front Speaker1. Front Panel ............ (A1) x19-1
2. Tip .......................... (A2) x2
3. Screw ..................... (A3) x4
PROCEDURE
FIGURE
Note:
The rear speakers can be easily disassembled.
Therefore the disassembling method is not discribed.
For details refer to the disassembling drawing in the Parts
Guide.
CP-C612
Front Panel
(A1)x1
Piezo
(A3)x4
ø4x12mm
Woofer
Figure 9-2
(A2)x2
Screw Driver
– 9 –
CD-C612
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3 and 8-12 of the disassembly method to
remove the CD mechanism.
How to remove the loading motor
(See Fig. 10-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Loading / Up
/ Down Motor
Motor
PWB
( A1 ) x2
ø2.6 x5mm
Figure 10-1
How to remove the pickup (See Fig. 10-2)
1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412Tape 1: Over 80 g
• Torque Check
Torque Meter
Tape 1
Play: TW-211130 to 60 g. cm30 to 60 g.cm
Fast forward: TW-2231—60 to 120 g.cm
Rewind: TW-2231—60 to 120 g.cm
After preparing the test circuit shown in Fig 11-2, connect the
Pin 13 , Pin 21 and ground of the IC303 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.
Adjusting
Parts
Instrument
Connection
of IC303
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
the core of IC301
transformer Output: TP302
T352 fully
counterclookwise.)
Instrument
Connection
IC303
Output: TP302
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
ErrorState Code
0001Cannot detect puin SW
0101Tray close operation error
0105Tray close operation error
0201Tray open operation error
0203Tray open operation error
0304Disc skip operation error
0305Disc skip operation error
0307Disc skip operation error
11
IC302
12
TP302
C356
VR351
VCO
Figure 11-1 ADJUSTMENT POINTS
Pin 13 of IC303
G
1
FM Band
Coverage
fL
22
L303
T351
CF351
12
IC303
13
21
MAIN PWB
Pin 21 of IC303
FET : 2SK19 or 2SK54
D
S
10 kΩ
Figure 11-2
IC301
9
T301
FM IF
TP301
AM IF
CF301
1
24
AM Band
Coverage fL
1
L302
FM RF
BF301
CNP301
R361
AM Tracking
fL
T333
T352
FM DET
TO FREQUENCY
COUNTER
T331
– 11 –
CD-C612
123
TEST MODE
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 12-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (
<MEMORY>
LASER ON
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
) or () key.
<MEMORY>
Tracking on the spot.
SERVO ON PLAY
IL is not performed.
<STOP>
STOP
<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
Press <STOP> key.
Stop
<Disc Number 3> key: Track 15
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
Figure 12-1
CD SECTION
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of 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 20 FE
FOCUS
OFF-SET
ADJUST
0.1s
0.50 V
IC1 7 TE
TRACKING
OFF-SET
ADJUST
1
2
Figure 12-2
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TO
TE
TRACKING/
ERROR
BARANCE
1
ADJUST
2
Figure 12-4
– 12 –
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Figure 12-3
Enlarged
View
TRACKING
OFF-SET
ADJUST
1
2
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.
CD-C612
• 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.