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MDS-JE770
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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.
•
f
: internal component.
• C : panel designation.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
a
: Through hole.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : STOP
( ) : PLAY
< > : REC
∗ : 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
j : REC
p : PB (DIGITAL OUT)
l : REC (DIGITAL IN)
• Abbreviation
SP : Singapore model
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
CE
B
These are omitted.
CE
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.
• WAVEFORMS
– MAIN Board –
– BD Board –
1 IC101 ek (RF)
2 IC101 ef (FE)
(Play mode)
3 IC101 wh (TE)
(Play mode)
4 IC151 qh (OSCI)
5 IC151 wj (LRCK)
6 IC151 wk (XBCK)
7 IC151 o; (FS4)
8 IC171 3
1.3Vp-p
0.2Vp-p
1.6Vp-p
3.1Vp-p
22 nesc
3.2Vp-p
22.6 µsec
3.8Vp-p
354 nsec
22 nsec
5.67 µsec
1.0Vp-p
3.2Vp-p
1 IC1 qd (XOUT)
2 IC550 qs
2.7Vp-p
2.6Vp-p
100 nsec
22 nsec
– DISPLAY Board –
3.2Vp-p
0.4 µsec
1
IC760 yh (OSCO)