Sony Mz-G750 Service Manual page 40

MZ-G750/R700
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 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti- pour la sécurité.
Ne les remplacer que par une
cal for safety.
piéce portant le numéro
Replace only with part
spécifié.
number specified.
• 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)
40 40
• Waveforms
1 100mV/DIV, 1µs/DIV
Approx.
220mVp-p
IC501 8 (IY) (PB mode)
2 100V/DIV, 1µs/DIV
Approx.
220mVp-p
IC501 9 (IX) (PB mode)
3 100mV/DIV, 1µs/DIV
Approx.
220mVp-p
IC501 q; (JX) (PB mode)
4 100mV/DIV, 1µs/DIV
Approx.
220mVp-p
IC501 qa (JY) (PB mode)
5 20mV/DIV, 500ns/DIV
Approx.
35mVp-p
IC501 1 (TE) (PB mode)
6 500mV/DIV, 500ns/DIV
Approx.
1.3Vp-p
ed
IC501 (RF OUT) (PB mode)
7 10mV/DIV, 500ns/DIV
Approx.
20mVp-p
rs
IC501 (FE) (PB mode)
1V/DIV, 2µs/DIV
8
2.5Vp-p
5.8µs
IC601 4 (CLK)
1V/DIV, 2µs/DIV
9
2.5Vp-p
5.8µs
IC901 th (CLK)