Dual CDS 660 Service Manual

Page 1

This ~il I is i .11lpl)".l l "i t- i' i" it til - it. .lir
[IIGQL (Niall CDS lit). ,_'u." t ll :i- _;;lii'.. 'ht... 3H:
l"t." ..' lll- vlti. l vil

ON 8: 2 \ L) 0 mi (LP/S) similwlr "vitlr'
mi mil it-giuuzt» and show m illlS
DN 83: (l 6 mil (LP/Si Sdl.Dl"" t'i'iilli'
tor micriigmove aiiifl stirrer» records
24 mil (78) sapphire needle fun 78 rpm llillmEH
records

DN 85: 0.6 mil (LP/S) diamond needle

frtr microgroove and stereo records

DN 86: 0.6 ml lLP/Sl sapphire needle
tor micmgroove and stereo records

Stylus type leg. DN 8, LP/Sl and right use are shown on needle

bearing.
To place the stylus requned in playing DOSIIIOH, turn needle
through l800.

Technical datas

Recommended stylus pressure. 4.5 g (4 -- 5 9)
Frequency range: 30 c.p.s. to 20 k.c.p.s.

Output: Minimum 65 mV / l cfil/sec
per channel at i k.c.p.s.
(1 M9] 200 pF)

Output difference

between channels: Maximum 2 dB at l k.c.p.s.
Isolation between channels: 20 dB at l k.c.p.s.
Intermodulation
distortion lFIM) level - 6 dB <1 %
Compliance: Horizontal 10 x 10-6 cm/dyn
Vertical 6 x 10-6 cm/dyn
AC resistance: per ceramic element
approx. 160 kg at 1.000 c.p.s.
Net weight: 3.8 9
Dual CDS 660

Stereo frequency response, cut-off resistance 1 MRI
200 pF. Measuring record DIN 45 541, 06 recording
curve :3 DIN 45 547,Stylus force 4,5 9., record player, Dual
1234, 0 dB = min 65 mV/crtts-1 at 45°. cutting angle =
20 C.

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Information about the pick-up cartridge

incorporated in your Dual automatic turntable

Dual CDS 660

The snapnn mounting of this pick-up cartridge on the cartridge holder elllnlllillBS
all other forms of m0unting. The snap on m0unting secures perfect gerimi.»
trical alignment of the stylus tip.

For proper balancmg of the tonearm (586 operating instructions tor your Dual
automatic turntable) the needle protector (weight apprommately 0.52 gl
should be removed from the pick-up cartridge.

Removal of pick-up cartridge

Rem0ve complete pick-up head from the
tonearm and remove slipon connectors from J

contact prongs of cartridge. Hold the moun- "2 9M" L
ting plate with one hand and pull down car.
tridge. The snap-on m0unting of the cartrid- E'BWW 5 \

ge on the cartridge plate is shown in Fig. 3.

lright grouse GR

_

"9'" channel R

Changing the stylus

After having removed the pick-up head turn
the needle bearing by 90° as shown in Fig. 4.
Now the needle can be changed quite easily.

Insert the needle in the same position and
make sure that the needle bearing is properly
seated in the cut-Outs of the cartridge.

Stylus

The stylus is subject to wear during use. We
recommend that the sapphire stylus sh0uld
be checked after playing ab0ut 30 heurs and
a diamond stylus should be checked after
playing about 300 hours. Your authorized
dealer will be glad to check your stylus free l
of charge. .
A worn out or damaged stylus chisels the F'Q- 3
modulations in the grooves and damages the
record. Replace the worn out stylus with one
that exactly meets the cartridge's specificati-
ons. lmitations will result in a loss in sound
quality and will increase the damage to y0ur
records.

Please notice that the stylus carrier with a
sapphire or diamond stylus, due to size, is
very sensitive to shocks. vibrations or sudden
impacts. To have your stylus changed take ~
the complete cartridge (with stylus) and have
it done by y0ur nearest authorized dealer.

Pick-up cartridges with 1/2" standard moun-
ting dimensions can be moonted on the cart-
ridge holder with conventional mounting
hardware. Fig. 4