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3838
MDS-NT1
6-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
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.
•
f
: internal component.
• C : panel designation.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
f
: internal component.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• A : B+ Line.
• B : B– Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PLAYBACK
( ) : STOP
∗
: 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 : PLAY
l : REC
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
4.5 Vp-p
22.7 ns
• Waveforms
– BD Board –
1 IC101 ek (RF) (PLAY mode)
2 IC101 ef (FE) (PLAY mode)
3 IC101 wh (TE) (PLAY mode)
6 IC201 eg (XBCK) (PLAY mode)
5 IC201 ef (LRCK) (PLAY mode)
4 IC201 w; (OSCO)
– MAIN Board –
qa IC301 qa (XOUT)
qd IC505 4 (LRCK) (PLAY mode)
qf IC505 2 (BICK) (PLAY mode)
qs IC901 5 (DSPCLK)
qg IC505 1 (MCLK)
1.4 Vp-p
approx
460 mVp-p
approx
620 mVp-p
2.6 Vp-p
11 ns
4.6 Vp-p
354 ns
3 Vp-p
100 ns
4.2 Vp-p
88 ns
4 Vp-p
22.7 ns
3.6 Vp-p
354 ns
4.2 Vp-p
88 ns
qh IC400 7 (EXT)
9.1 Vp-p
15.8 µs
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.