Notes For Printed Wiring Board And Schematic Diagram - Sony MDS-DRE1 Service Manual

• Circuit Boards Location
DETECTION SW board
MOTOR board
JOG board
EJECT board
BD board
PSW board
DISPLAY board
REC board
CENTER board
POWER board
FADER board
DIGITAL board
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6-5.

NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM

(In addition to this, the necessary note is printed in each block)
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.
• : internal component.
¢
• 2 : nonflammable resistor.
• C : panel designation.
Note:
Note:
The components identi- Les composants identifiés par
fied by mark ! or dotted une marque ! sont critiques
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce portant le numéro
number specified. spécifié.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal 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
: PLAY
j
: REC (ANALOG IN)
k : REC (DIGITAL IN)
f
: REC (COAXIAL DIGITAL IN)
h : REC (OPTICAL DIGITAL IN)
MDS-DRE1
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
®
• b : 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
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
• Indication of transistor.
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
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