Studer A 725 Service Manual 2

Page 1

A7 25

SECTION 1/10

- The stop mark is to be changed to 25:27.

- By pressing the CURSOR key, advance to the minutes
input field of the stop mark; the word TIME reappears
in the second entry field: (enter ZS).

STEP TIME TIME
_ "l- :l F El 5 I 0-!
i: i 3' .J .J C t_1
1 5 10 I5 20 25 30
III II II III II
-with the CURSOR key, advance to the seconds input
field; the in the second fieLd reappears: (enter
27).
STEP
2' 'i
' I
l-
I 25 30
III
This modified program step can now be stored. in the
foregoing exampte, all fields were modified. However,

with the cursor it is possible to make seLective changes
in any position of a program step.

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A program can be cancelled in two ways:

(It is not necessary to cancel the uLd program before a
new one is entered. The old one can be simply over-
written).

1. By simultaneously pressing the STORE and PROGRAM keys
in which case the program mode must be active.

2. By a power failure (>50 ms). Switching off the (D
p.ayer with the POWER key does not erase the memory
content because the memory remains under power in

s landby mode.

The
steps such as repeat mode, automatic switch-off, etc.

foLLowing section describes certain speciat program

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The Loop function can be programmed
program (only as the last one makes sense). If a LOOP
command is entered in the Last step of a program, the
entire program wiLL be continuously repeated until it is
interruped with the LOAD key.

in any step of the

Example (a program comprising IA steps is to be repeated):

- Press JROGRAM (26) key and page forward to step 15 with
key (19).

- Enter step 15: press LOOP
place of the TRACK number.

(18) key. An "L" appears in
Save the entry with STORE

(22).
STEP TRACK
._ l
lb L
I 5 10 1s 20 25 so
III III II III I

If the program is now started normally by pressing
PLAY/NEXT (4), the entire program is repeated when the
end is reached. Looping continues until the program is
interrupted with the LOAD key or by switching off the
unit.

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A pause can be programmed at the end of a selection in
the same manner as described in Section T.>.1_ In our
exampLe a pawse shalt be entered after step 9 instead of
the repeat function at the end of the program.

- Page forward in the program to step 10, then press the

PAUSE key (1). A "P" appears in the display. Store the
entry.
STEP TRACK
ll-l
IL
I 5 l5 2!) 25 30

10
IIIIIIIIIIIIIIIII

~ The CD player switches to pause after the ninth program
step. However, the beginning 06 the next step wiLL be
accessed. To continue the program press the PLAY/NEXT
key (A). The program continues to run until the next
pause is encountered or untiL the end is reached, if no
iurther pause was programmed.

Note:

If a pause is desired after each step, the AUTOSTOP (i4)
button can be pressed each time before the program is
started (also in PLAY PROGRAM MODE). As a result the
PAUSE function is activated after each step.

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A command for switching off the to player can be entered
in a program step:

- Activate program mode and page forward with key (19) to

the last program step + 1, e.g. step 16 if the last
step was 15.
STFP TRACK
-
:5
1 5 IO 15 20 25 30

This does not
POWER key is

- Press (POWER (13); a - is displayed.
power off the CD pLayer (untess the
pressed twice in program mode).

- Press STORE key. Start the program with PLAY/NEXT (A).
The CD pLayer switches itself off in the last program
step.

Page 2

SWEJEE} A725 SECTION 1/11
1;§----1§EH!L£AL-Q£IA
A Audio data D DispLay

Number of channeLs:
Frequency response:
Harmonic distorsion:
S/N ratio, Linear:

S/M ratio, ueighted:

ChanneL separation:
Output LeveL:

7 AUDIO OUTPUT FIXED

- AUDIO OUTPUT VARIABLE

- AUDIO OUTPUT LINE

Phones output:

ChanneL baLance (L/R):

2

ZOHZ ... ZOkHZ, +D/-0.6dE
< 0.006% (ZOHZ . ZOkHZ)
> 94dB (ZOHZ . ZUkHz)

> 100dB (corresponding to
IE: 179, A curve)
> 90dB (10kHZ)

2V, Ri circuit proof

0 .. 2v, Ri (500 Q,
short-circuit proof

+15 dBm, (at OdB, RL 2
600 Q), adjusting range
3 ... 15 dBm, Ri <50 Q
4.5V, Ri <50 9, short-
circuit proof

(0.2dB

short-

Phase Linearity through digitat filtering (oversampLing)
Mono compatibiLity through separated D/A converter L and R

B OpticaL system

Sampting frequency:
Quantization:

Pickup:

Have Length:

Error correcting system:

Preemphasis:

C Disc drive / controk

CD rotation speed:

Scanning veLocity:

wou and (Lutter:

Maximum pLaying time:
Starting precision:

Start deLay from pause:
Search time for any Location
(up to track 37):

Qgtigns

, YransformerLess
Line input
(Adjustment range,
AUDIO OUTPUT LINE:

- TabLe version set (side
paneLs for stand-aLone
instaLLation):

Qimaasigns

AA.1 kHz

16 bit Linear/channeL
ALGaAs semiconductor Laser
0.78 pm

CIRC (Cross InterLeave
Reed SoLomon Code)
SO/iSps, seLected automa-
ticaLIy by the subcode on
the CD

500 ,., 200 rpm

1.2 ... 1.4 m/s

quartz crystal precision
74 minutes

11 Frame (13,3ms)

< 0.65

< 35

Part No. 1:769.275t00

O to 18 dBm)

2 x part No. 1.769.090.01

_ ,ir:4r§1li
SEEDS

MuLtifunction LC dispLay suppLies the foLLouing status

information:

TRACK:

INDEX:

TIME:

PAUSE, AUTOSTOF, LOOP:

PROGRAM MODE:

E Programming faciLities

Number 09 program steps:
Content of program steps:
Programming methods:

Step resoLution:

Spec iaL functions:

F GeneraL

Power requirements:

Pouer fuses:

Pouer consumption:
Dimensions:
weight:

the current position can
be determined either from
the dispLayed TRACK number
or the 30 segment bar.
indices are disptayed au-
tomaticaLLy.

either time can be read
out:

TRACK TIME

TRACK REMAINING TIME (up
to track 36)

DISC TIME

DISC REMAINING TIME
speciaL operating modes
are indicated.

each program step is indi-
cated with a resoLution of
one second.

19

TRACK, TIME or mixed
keyboard entry or setting
oi marks.

each step can be defined
with a resoLution of one
second.

special functions such as
LOOP, PAUSE, etc. can be
programmed.

100/120/140V, ZOO/ZZO/ZAOV
:10%, 50/60 Hz adjusta-
bLe on voLtage sekector.
100..1LOV = T 500 mA SLOU
200...240V = T 250 mA SLOW
40 u max.

kSD x 109 x 332 mm (Hxhxd)
B,5kg