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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 Ω 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 MΩ).
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