Note For Printed Wiring Boards And Schematic Diagrams - Sony HCD-EP505 Service Manual

6-5.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• W : indicates side identified with part number.
• : internal component.
f
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
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.
f
• C : panel designation.
Note: Note:
The components identified Les composants identifiés par
by mark 0 or dotted line une marque 0 sont critiques
with mark 0 are critical for pour la sécurité.
Ne les remplacer que par une
safety.
pièce por tant le numéro
Replace only with part
spécifié.
number specified.
• A : B+ Line.
• B : B– Line.
• 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
: FM
f : AM
E : TAPE PLAY
a : RECORD
J : CD PLAY
• Abbreviation
AR : Argentina model
CH : Chinese model
CND : Canadian model
E51 : Chilean and Peruvian models
HK : Hong Kong model
• Waveforms
– MAIN Board (AEP, UK, CH models) –
1 U403 w; (XOUT) (TUNER mode)
3.0 Vp-p
140 ns
2 Q615 (Collector) (REC mode)
12.4 Vp-p
17.8 µs
– MAIN Board (Except AEP, UK, CH models) –
wa U402 ws (XOUT) (TUNER mode)
4.0 Vp-p
140 ns
ws Q615 (Collector) (REC mode)
12.4 Vp-p
17.8 µs
19 19
– DISPLAY Board –
3 IC301 ul (X1)
5.1 Vp-p
240 ns
4 IC305 qf (XO) (AEP, UK model)
1.8 Vp-p
230 ns
HCD-EP505
Ver 1.1