Sony MZ-R700 MiniDisc Player User Manual


 
MZ-G750/R700
4040
Common note on Schematic Diagram:
All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
All resistors are in and
1
/
4
W or less unless otherwise
specified.
% : indicates tolerance.
C : panel designation.
A : B+ Line.
Total current is measured with Minidisc installed.
Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack.
Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PB
( ) : REC
< > : TUNER
: Impossible to measure
Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal produc-
tion tolerances.
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
Circled numbers refer to waveforms.
Signal path.
E : PB
k : REC (ANALOG)
l : REC (DIGITAL)
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
1
IC501
8
(IY) (PB mode)
2
IC501
9
(IX) (PB mode)
Approx.
220mVp-p
3
IC501
q;
(JX) (PB mode)
Approx.
220mVp-p
Waveforms
100mV/DIV, 1µs/DIV
100V/DIV, 1µs/DIV
100mV/DIV, 1µs/DIV
Approx.
220mVp-p
4
IC501
qa
(JY) (PB mode)
Approx.
220mVp-p
100mV/DIV, 1µs/DIV
5
IC501
1
(TE) (PB mode)
Approx.
35mVp-p
20mV/DIV, 500ns/DIV
6
IC501
ed
(RF OUT) (PB mode)
500mV/DIV, 500ns/DIV
7
IC501
rs
(FE) (PB mode)
10mV/DIV, 500ns/DIV
8
IC601
4
(CLK)
2.5Vp-p
5.8µs
1V/DIV, 2µs/DIV
9
IC901
th
(CLK)
2.5Vp-p
5.8µs
1V/DIV, 2µs/DIV
Approx.
1.3Vp-p
Approx.
20mVp-p