Sony HCD-EP303 Service Manual page 17

Note on Printed Wiring Board:
• W : indicates side identified with part number.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor
B C E
These are omitted.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. p: pF.
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.
• 2 : nonflammable resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
number specified. spécifié.
• A : B+ Line.
• H : adjustment for repair.
• 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.
no mark : FM
< > : CD (STOP)
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f : AM
E : PB (TAPE)
a
: REC (TAPE)
J
: CD PLAY
• Abbreviation
E51 : Chilean and Peruvian model.
MY : Malaysia model.
SP : Singapore model.
AR : Argentine model.
MX : Mexican model.
AUS : Australian model.
• WAVEFORMS
– MAIN Board – – CASSETTE Board –
1 2
IC102 ws (XOUT)
3.4 Vp-p
139 ns
1 V/DIV, 40 ns/DIV
17 17
– DISPLAY Board –
3
Q705 (Collector) IC601 tl (X2)
(RECORD mode)
6.0 Vp-p
12.4 µ s
167 ns
2 V/DIV, 4 µ s/DIV
1 V/DIV, 100 ns/DIV
HCD-EP303
5.2 Vp-p