AMC CD8b User Manual

SERVICE SAFETY PRECAUTIONS (UL)  
1. Use exact replacement parts for critical locations, marked " ".  
2. Return lead dress to original position, and re install protective  
covers.  
3. Before returning to customer, test for shock hazard; use either  
method A or B:  
A. Leakage test, "cold":  
1. Unplug AC cord; turn power switch ON.  
2. Connect one lead of High Voltage Insulation Tester to both  
prongs of AC plug.  
3. Touch other lead to all exposed metal parts.  
4. Impedance measurement must be 0.3-5.0 Megohms.  
B. Leakage test, "live":  
WARNING! INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED.  
AVOID EXPOSURE TO BEAM.  
VORSICHT! UNSICHTBARE LASERSTRAHLEN TRITT AUS, WENN DECKEL GE FFNET  
UND WENN SICHERHEITSVERRIEGELUNG BERBR CKT IST. NICHT DEM STRAHL  
AUSSETZEN.  
ADVARSEL- USYNLIG LASERSTR LING VED BNING, N R SIKKERHEDSAFBRYDERE  
ER UDE AF FUNKTION. UNDG UDS TTELSE FOR STR LUNG.  
ADVARSEL- USYNLIG LASERSTR LING N R DEKSEL PNES OG SIKKERHEDSL  
BRYTES. UNNG EKSPONERING FOR STR LEN.  
S
VARNING- OSYNLIG LASERSTR LNING N R DENNA DEL  
R URKOPPLADE. STR LEN R FARLIG.  
R
PPNAD OCH SP RRAR  
1. Plug unit directly into AC outlet; do not use isolation transformer.  
2. Connect one lead of Leakage Current Tester to earth ground.  
3. Touch other lead to all exposed metal parts.  
4. Leakage measurement must be less than 0.5 milliamps.  
VARO!- AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTlINA  
KYM NNT LASERS TEILYLLE. KATSO S TEESEEN.  
N
T
L
CLASS 1 LASER PRODUCT  
LUOKAN 1 LASERPLAITE  
KLASS 1 LASERAPPARAT  
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH THE SAME  
TYPE OF T800mA/250V FUSES.  
ATTENTION: POUR MAINTENIR PROTECTION CONTRE RISQUE D'INCENDIE, UTILISER LES FUSIBLES  
DE RECHANGE DE MEME TYPE DE T800mA/250V.  
THIS DIGITAL APPARATUS DOES NOT EXCEED THE CLASS B LIMITS FOR RADIO NOISE EMISSIONS  
FROM DIGITAL APPARATUS AS SET OUT IN THE RADIO INTERFERENCE REGULATIONS OF THE  
CANADIAN DEPARTMENT OF COMMUNICATIONS.  
LE PRESENT APPAREIL NUMVERIQUE N'EMET PAS DE BRUITS RADIOELECTRIQUES DEPASSANT  
LES LIMITES APPLICABLES AUX APPAREILS NUMERIQUES DE LA CLASSE B PRESCRITES DANS LE  
REGLEMENT SUR LE BROUILLAGE RADIO ELECTRIQUE EDICTE PAR LE MINISTERE DES  
COMMUNICATIONS DU CANADA.  
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE  
FOLLOWING TWO CONDITIONS:  
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND  
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT  
MAY CAUSE UNDESIRED OPERATION.  
2
FEATURES OF THE AMCTM MODEL CD8b  
* The AMC model CD8b was designed to meet professional quality performance  
standards and to provide superior value.  
* Select grade components are utilized throughout the circuit design with special  
emphasis on components within the audio path to assure stable, consistent performance.  
* Premium transport and servo drive system assures constant data rate retrieval and  
unsurpassed tracking performance.  
* Use Burr Brown 96kHz/24bit D/A converter for high resolution and superb audio  
reproduction.  
* Unique 5-pole linear active LPF (low pass filter) prevents interference from ultrasonic  
noise commonly found in other CD playback systems.  
* Advanced power supply design incorporates separate windings for the digital, analog  
and servo circuits to prevent interference and preserve sonic performance.  
* EIA calibrated audio outputs ensure a proper match with preamplifiers and receivers.  
* Provide digital output allow the CD8b to be used as a high-quality transport and provide  
for future upgrades.  
* Up to 21 tracks may be programmed to playback in desired order.  
* Full-function infrared (IR) remote control with direct track access.  
TRANSIT SCREW  
A transit screw secures the  
transport mechanism for protection  
during shipment.  
Before making  
any connections or applying power  
to the CD6b, remove the transit  
screw which is located on the  
underside of the unit.  
3
REAR PANEL  
1
2
3
1. AUDIO OUTPUT  
2. DIGITAL OUTPUT  
3. AC LINE CORD  
11  
10  
2
3
4
5
6
7
8
9
1
1. POWER SWITCH AND POWER  
INDICATOR  
6. PROGRAM  
7. REPEAT  
8. TIME  
2. OPEN/CLOSE  
3. PLAY  
9. SEARCH  
10. TRACK  
11. DISPLAY  
4. PAUSE  
5. STOP  
4
1. AUDIO OUTPUT  
Connect the left and right channel  
unbalanced (RCA) audio outputs to any  
input on your preamplifier or receiver  
except "Phono" or "Turntable". High-  
quality interconnection cables are  
recommended.  
2. DIGITAL OUTPUT  
Co-axial cable digital output.  
3. AC LINE CORD  
Plug the AC line cord into a switched outlet  
on your amplifier or into any AC wall  
outlet that provides the correct line voltage.  
5
1. POWER SWITCH  
a) Use the TRACK button to select the first  
The CD player is turned on by depressing track in your planned sequence. In  
the power switch. The LED indicator the memory mode, the CD8b has a "wrap-  
above the power switch will glow green.  
around" function. If you TRACK back  
Note: All connections must be repeatedly from track "00", the number  
completed before turning the power on. counts down from the final track of the disc.  
This provides a convenient way to select  
2. OPEN/CLOSE h i g h - n u m b e r e d t r a c k s d u r i n g  
By pressing the open/close button the disc programming.  
drawer will open. Pressing it again b) Press PROGRAM to store the selected  
will close the drawer. If the drawer is track in memory. The track number  
opened while a disc is playing, the disc will will revert back to "00" and the time display  
stop and the drawer will open. An open will advance to "P:02", showing the  
drawer can also be closed by pressing player is ready for a second entry.  
PLAY or by gently pushing the drawer c) Repeat steps a and b, TRACK and  
inward. If the OPEN/CLOSE button is PROGRAM, to select and store other  
pushed after programming the player, all track numbers in memory, up to a  
programming will be erased.  
maximum of 21 entries.  
d) At any point during the program entry  
process, the TIME button on the player  
3. PLAY  
Place a CD into the open drawer with the can be pressed to display the total playing  
label facing up. Press the PLAY button to time of the program.  
close the drawer and begin playback. e) To review programmed entries, press  
Playback will stop when the STOP button is PROGRAM repeatedly to show  
pressed or when the disc has reached the programmed entries. When the displayed  
end.  
t r a c k n u m b e r r e t u r n s t o " 0 0 " ,  
additional tracks may be entered in the  
memory by repeating steps a and b.  
4. PAUSE  
While the disc is playing, press the PAUSE f) To play the stored programs, press  
button to suspend playback. Press PROGRAM followed by PLAY. The word  
the PAUSE button again to resume PROGRAM will appear in the upper-right  
playback.  
corner of the display indicating that a stored  
program is being played.  
During program playback the TRACK  
5. STOP  
To stop the CD while playing, press the buttons will access only the tracks in the  
STOP button. Pressing the STOP button program list. If you want to skip over a  
will cancel any repeat-play cycles and the portion of a stored program, initiate play  
display will show the number of the and press TRACK to jump over the  
tracks and total time on the disc.  
programmed tracks you don't want to hear.  
g) To terminate the programmed play,  
press STOP. The TRACK and SEARCH  
6. PROGRAMMING  
The CD8b can be programmed to play up buttons will now access any track on the  
to 21 tracks in any desired order. disc. The stored track list , however, still  
To program playback, start by pressing the remains in the memory. If you want to play  
PROGRAM button. The MEMORY the program again, simply press  
indicator will illuminate. When the track PROGRAM followed by PLAY. If you want  
number displays "00" and the time display to add new tracks to the program, press  
indicates "P:01" programming entries may PROGRAM repeatedly to review the list  
be entered.  
until the track number shows "00".  
6
h) To clear the program memory, press 10. TRACK  
OPEN/CLOSE to open the drawer or Press TRACK (< or >) to find a desired  
simply switch off the power.  
track. Track number is displayed.  
7. REPEAT  
11. DISPLAY  
This button will allow two different types of When loading a disc and using the  
endless play modes. OPEN/CLOSE button to close the disc  
Press the REPEAT button once, the word drawer, the TOC (Table of Contents) of the  
REPEAT 1 will appear on the display disc will be read and the display will show  
and the selected track will be repeated the number of tracks and the total playing  
endlessly until the STOP button is time of all of he tracks on the disc. During  
pressed. play, the following information is displayed:  
Press the REPEAT button a second time, Track Number  
the word REPEAT ALL will appear and the These track numbers are identified on the  
entire disc will repeat until the STOP button CD package and are encoded in the  
in pressed. disc by the manufacturer.  
Press the REPEAT button a third time or Time  
press the STOP button to cancel Shows in minutes and seconds the time  
REPEAT mode. The display and operation elapsed in the music since the  
will return to normal.  
beginning of the current track. Pressing  
the TIME button will display the time  
remaining until the end of the current track  
8. TIME  
The TIME button will cycle the time display or the playing time remaining until the  
end of the disc.  
through three different modes.  
a. TIME: the elapsed time since the  
beginning of the current track, in minutes Status  
Explanation  
glows to indicate disc is  
playing.  
glows to indicate that a disc  
cannot be read.  
and seconds. ( This is the "default" setting,  
selected automatically when the player is  
turned on).  
>
II  
b. REMAIN: (track number displayed):  
shows the total playing time that remains till REPEAT 1  
the end of the current track.  
glows during repeat play of a  
single track.  
c. REMAIN: (track number blank): The total REPEAT ALL glows during repeat play of  
playing time that remains till the end of the the entire disc.  
disc. During program play, the remaining REPEAT AB glows during repeat play  
time of the program is shown. During  
program entry, the TIME button displays REMAIN  
the total playing time of the tracks in the  
program.  
from point A to point B.  
glows to indicate number of  
tracks on disc being loaded  
or the tracks that have been  
programmed into memory.  
The number of the track that  
is playing will flash.  
glows when the disc  
contains more than 16  
tracks.  
9. SEARCH  
Press and hold SEARCH (<< or >>) to find  
a desired starting point or a certain OVER  
part of a track. When the SEARCH button  
is pressed and held during playback  
the output level will be automatically  
attenuated by 12dB.  
7
REMOTE CONTROL  
An infrared (IR) remote control is provided for convenient operation of the CD8b. The  
handset provides the same control functions as the front panel PLUS two additional  
control functions.  
NUMERIC KEYPAD (1-10, +10)  
Allows direct selection of desired track. Upon entry of the desired track number, the  
player shifts to the beginning of the track and begins to play.  
To select track 8, simply press the "8" button. To select track 24, press the "+10" button  
twice and then press the "4" button ( +10, +10, 4 ).  
RANDOM  
Pressing the RANDOM button before or during play will cause the CD8b to play all tracks  
on the disc in a random order until all tracks have been played. To cancel random play,  
simply press the RANDOM button again.  
8
AUDIO OUTPUT (Ref. 1KHz/0dB, unless otherwise stated):  
Disc capacity.............................................................................Single disc, 120 or 80mm  
Programming capability.....................................................................................21 Tracks  
Digital to analogue convertion..............................Enhanced multilevel Delta-Sigma DAC  
Digital filter.....................................................8X over-sampling at a 96Khz sampling rate  
(Stop band attenuation:82dB, passband ripple: +/-0.002dB)  
Analogue filter..............................................................................................5-Pole active  
Frequency response 5Hz-20KHz.....................................................................<+/-0.3 dB  
De-Emphasis error...........................................................................................<+/-0.3 dB  
Linearity...........................................................................................+/-0.5 dB: 0 to -90 dB  
Channel separation (20Hz to 20KHz)..................................................................>90 dB  
Channel imbalance..........................................................................................<+/-0.2 dB  
S/N ratio (Aweighted, measured with all zeros test disc).........................................105 dB  
Dynamic range....................................................................................................>100 dB  
THD (at 0dB, 1KHz, Aweighted)........................................................0.0018% (-94.9 dB)  
Intermodulation distortion (19 & 20 KHz).............................................................<100 dB  
Output impedance..............................................................................................120 ohm  
Output level at 0dB............................................................................................2.2 Vrms  
Digital error correction..........................................................................CIRC with double  
error correction in C1 and C2  
Wow and flutter.......................................................................................Unmeasureable  
(Quartz crystal accuracy)  
Remote control unit..................................................Full functional with numeric keypad  
S/PDIF DIGITAL OUTPUT:  
Digital Output level.......................................................................................0.5 Vpp  
Load impedance...................................................................................................75 ohm  
Peak emission wave length...................................................................................660 nm  
PHYSICAL:  
Dimensions (W x H x D).........................................................................430x82x300 mm  
Net weight............................................................................................................6.5 Kgs  
Shipping weight (4 pieces)..................................................................................28.5 Kgs  
Power consumption..................................................................................................30 W  
Weltronics Corp. reserved the right to improve its products at any time. Specifications are  
subject to change without notice.  
9
1. READ INSTRUCTIONS  
16. DAMAGE REQUIRING SERVICE  
All the safety and operating instructions should be read  
before the appliance is operated.  
The appliance should be serviced by qualified service  
personnel when:  
a) The power-supply cord or the plug has been damaged; or  
b) Objects have fallen, or liquid has been spilled into the  
appliance; or  
c) The appliance has been exposed to rain; or  
d) The appliance does not appear to operate normally or  
exhibits a marked change in performance; or  
e) The appliance has been dropped, or the enclosure is  
damaged.  
2. RETAIN INSTRUCTIONS  
The safety and operating instructions should be retained for  
future reference.  
3. HEED WARNINGS  
All warnings on the appliance and in the operating instructions  
should be adhered to.  
4. FOLLOW INSTRUCTIONS  
17. POWER LINES  
(APPLIES TO TUNER AND RECEIVERS ONLY)  
All operating and use instructions should be followed.  
5. WATER AND MOISTURE  
An outdoor antenna should be located away from power lines.  
18. OUTDOOR ANTENNA GROUNDING  
(APPLIES TO TUNER AND RECEIVERS ONLY)  
The appliance should not be used near water - for example,  
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet  
basement, or near a swimming pool, etc.  
If an outside antenna is connected to the receiver, be sure the  
antenna system is grounded so as to provide some protection  
against voltage surges and built up static charges.  
Section 810 of the National Electrical Code, ANSI/NFPA No.  
70-1984, provides information with respect to proper  
grounding of the mast and supporting structure, grounding of  
the lead-in wire to an antenna discharge unit, size of grounding  
conductors, location of antenna-discharge unit, connection to  
grounding electrodes, and requirements for the grounding  
electrode. See Figure.  
6. CARTS AND STANDS  
The appliance should be used only with a cart or stand that is  
recommended by the manufacturer.  
PORTABLE CART WARNING  
6A.An appliance and cart combination should be  
moved with care. Quick stops, excessive force,  
and uneven surfaces may cause the appliance  
and cart combination to overturn.  
a) Use No. 10 AWG (5.3 mm2) copper, No. 8 AWG (8.4 mm2)  
aluminum, No. 17 AWG (1.0 mm2) copper-clad steel or  
bronze wire, or larger, as a ground wire.  
b) Secure antenna lead-in and ground wires to house with  
stand-off insulators spaced from 4-6 feet (1.22-1.83 m)  
apart.  
7. WALL OR CEILING MOUNTING  
S3125A  
This equipment is not designed for use mounted on a wall or a  
ceiling.  
8. VENTILATION  
The appliance should be situated so that its location or position  
does not interfere with its proper ventilation. For example, the  
appliance should not be situated on a bed, sofa, rug, or similar  
surface that may block the ventilation openings, or placed in a  
built-in installation, such as bookcase or cabinet that may  
impede the flow of air through the ventilation openings.  
c) Mount antenna discharge unit as close as possible to where  
lead-in enters house.  
d) Use jumper wire not smaller than No.6 AWG (13.3 mm2)  
copper, or the equivalent, when a separate antenna-  
grounding electrode is used. See NEC Section 810-21(j).  
9. HEAT  
Antenna Grounding According to  
the National Electrical Code  
The appliance should be situated away from heat sources  
such as radiators, heat registers, stoves, or other appliances  
(including amplifiers) that produce heat.  
10. POWER SOURCES  
The appliance should be connected to a power supply only of  
the type described in the operating instructions or as marked  
on the appliance.  
Antenna Lead  
In Wire  
11. POWER-CORD PROTECTION  
Power-supply cords should be routed so that they are not likely  
to be walked on or pinched by items placed upon or against  
them, paying particular attention to cords at plugs,  
convenience receptacles, and the point where they exit from  
the appliance  
Antenna  
Discharge  
Clamp  
Ground  
Unit (NEC  
Section 810.20)  
12. CLEANING  
Electric  
Service  
Equipment  
Grounding Conductors  
(NEC Section 810.21)  
The appliance should be cleaned only as recommended by  
the manufacturer.  
Ground Clamps  
13. NON USE PERIODS  
The power cord of the appliance should be unplugged from the  
outlet when left unused for a long period of time.  
Power Service Grounding  
Electrode System  
(NEC Art 250 Part H)  
14. OBJECT AND LIQUID ENTRY  
Care should be taken so that objects do not fall and liquids are  
not spilled into the enclosure through openings.  
National Electrical Code  
Available from Library, book  
stores, or National Fire Protection  
Association (Batterymarch Park,  
Quincy. MA 02269).  
15. SERVICING  
The user should not attempt to service the appliance beyond  
that described in the operating instructions. All other servicing  
should be referred to qualified service personnel.  
AMC 21-3004  
PN: 21-4136  

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