Note For Printed Wiring Boards And Schematic Diagrams - Sony STR-DE335 Service Manual

5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
Q
B C E
These are omitted.
Q
B C E
These are omitted.
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.
• ¢ : internal component.
• 2 : nonflammable resistor.
• 5 : fusible 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.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM)
• 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.
F
: TUNER (FM)
g : VIDEO
• Abbreviation
AUS : Australian model
CND : Canadian model
MY : Malaysia model
SP : Singapore model
– 17 –
• Waveforms
– MAIN Board – – DISPLAY Board –
1 IC1 !£ (OSCI)
1 IC201 #∞ (X2)
2.7 Vp-p
4.332 MHz
2 IC300 $• (OSC1) (Change DOLBY Mode)
0.4 Vp-p
32.5 µ s
3 IC301 $º (LC-INE)
3.1 Vp-p
125 ns
4 IC301 $¡ (CR-OT)
1.2 Vp-p
122 ns
5.4 Vp-p
4.19 MHz
– 18 –