Printed Wiring Boards And Schematic Diagrams; Waveform - Sony DVP-NC875V Service Manual

DVP-NC875V

4-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block)
For printed wiring boards:
• : indicates a lead wire mounted on the component
side.
• : indicates a lead wire mounted on the printed side.
• a : Through hole.
• : 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 A) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side B) the parts face are indicated.
• Abbreviation
US : US model

WAVEFORM

MB-117
For schematic diagrams:
• All capacitors are in µF unless otherwise noted. pF : µµF.
50V or less are not indicated except for electrolytics and
tantalums.
• All resistors are in ohms, 1/4W (Chip resistors : 1/10W)
un-less otherwise specified.
kΩ = 1000Ω, MΩ = 1000kΩ.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum capacitor,
because it is damaged by the heat.
• All variable and adjustable resistors have characteristic
curve B, unless otherwise noted.
• : non flammable resistor.
• : fusible resistor.
• : panel designation.
• f : internal component.
• : adjustment for repair.
• : B+ Line.
B+
• : B– Line.
B–
• Circled numbers refer to waveforms.
• Voltages are dc between measurement point.
• Readings are taken with a color-bar signal on DVD refer-
ence disc and when playing CD reference disc.
• Readings are taken with a digital multimeter (DC 10MΩ).
• Voltage variations may be noted due to normal production
tolerances.
Note: Note:
The components identi- Les composants identifiés par
fied by mark or dotted une marque sont critiques
pour la sécurité.
line with mark are criti-
Ne les remplacer que par une
cal for safety.
pièce portant le numéro
Replace only with part
number specified. spécifié.
When indicating parts by reference
number, please include the board
name.
4-3
4-3. WAVEFORM
MB-117 BOARD
IC102 6 (CD PB) IC102
5 10
0.8Vp-p
0.7Vp-p
200nsec
63.5usec
5 IC102 6 (DVD PB) 11 IC102 203
1.1Vp-p
0.7Vp-p
100nsec
63.5usec
6 IC102 C/BAR PB IC102
196 12 228
3.3Vp-p
0.7Vp-p
27MHz
63.5us
7 IC102 C/BAR PB 16 IC102
194 156
3.3Vp-p
1Vp-p
110MHz
63.5usec
8 IC102 C/BAR PB 17 IC102
198 215
3.3Vp-p
1Vp-p
24MHz
63.5usec
9 IC102 C/BAR PB IC301 9
200 18
3.5Vp-p
1Vp-p
355ns
63.5usec
4-4
IC301 qj
19
3.5Vp-p
22.5us
Interval is "NO DISC"
20 IC301 q; just after POWER ON
3.5Vp-p
88ns
Interval is "NO DISC"
just after POWER ON