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SECTION 6
DIAGRAMS
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
/
W or less unless otherwise
4
specified.
•
: internal component.
f
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
• 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
l : REC (DIGITAL IN)
p : PLAY (DIGITAL OUT)
• Abbreviation
SP
: Singapore model
RU
: Russian model
6-1. CIRCUIT BOARDS LOCATION
PT board
KEY-SW board
HP board
KB board
DISPLAY board
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: Through hole.
a
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
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.
B
C E
These are omitted.
B
C
E
These are omitted.
C
Q
These are omitted.
B
E
VOL SEL board (SP model only)
USB board
MAIN board
BD board
• WAVEFORMS
– BD Board –
1
IC101 wh (TE)
(Play mode)
1.5Vp-p
On track jumping
2
IC101 ef (FE)
(Play mode)
0.1Vp-p
3
IC101 ek (RF)
1.2Vp-p
4
IC803 1 (XIN)
2Vp-p
11.2896 MHz
5
IC201 w; (OSCO)
2.5Vp-p
90.3 MHz
6
IC201 ef (LRCK)
3.2Vp-p
23 µsec
7
IC201 eg (XBCK)
3.2Vp-p
0.36 µsec
33
33
MDS-JE780
Ver. 1.2
– MAIN Board –
1
IC1 qd (XOUT)
3.0Vp-p
10 MHz
2
IC500 8 (XTO)
4.5Vp-p
11.2896 MHz
– DISPLAY Board –
1
IC760 yh (OSC0)
3.2Vp-p
0.47µsec
– USB Board –
1
IC201 rj (XTAL)
3.7Vp-p
12MHz
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