Diagrams; Note For Printed Wiring Boards And Schematic Diagrams; Waveforms; Circuit Boards Location - Sony HCD-C7NT Service Manual

6-1. Note For Printed Wiring Boards and Schematic Diagrams

(In addition to this, the necessary note is printed in each block)
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• : Through hole.
a
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
• Abbreviation
KR : Korean model

• Waveforms

1 2
IC101 us XTAO IC101 ek (RF)
4.0Vp-p
29.5 µ s
1.3Vp-p
VOLT/DIV : 1V AC
TIME/DIV : 20 nsec
5 6
IC151 o; (FS4) IC501 eh XT2
3.2Vp-p
3.5Vp-p
30.5 µ s
176.4kHz
VOLT/DIV : 1V AC
TIME/DIV : 20 µ sec
9 q;
IC1005 wd (XI) IC1004 wd (XI)
4.3 Vp-p
4.8 Vp-p
166 ns
80 ns
VOLT/DIV : 1V AC VOLT/DIV : 2V AC
TIME/DIV : 40 nsec TIME/DIV : 100 nsec
SECTION 6

DIAGRAMS

Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 V 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
• 5 : fusible resistor.
• C : panel designation.
• A : B+ Line.
• B : B– Line.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• 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
J : CD (ANALOG)
c : CD (DIGITAL)
p : PB (MD)
l : REC (MD)
I : DIGITAL IN (OPTICAL)
E : PB (TAPE)
G
: REC (TAPE)
J J
: USB
• Abbreviation
KR : Korean model
3 4
IC101 ef (FE) IC101 wh (TE)
(Play mode) (Play mode)
0.2Vp-p
7 8
IC501 ek X2 IC1007 wk X2 (XTO)
3.1 Vp-p
83 ns
50 ns
VOLT/DIV : 1V AC
VOLT/DIV : 1V AC
TIME/DIV : 40 nsec
TIME/DIV : 40 nsec
qa qs
IC1003 qa XOUT IC1002 rj (XTAL)
3.2 Vp-p
99 ns 83ns
VOLT/DIV : 1V AC VOLT/DIV : 1V AC
TIME/DIV : 40 nsec TIME/DIV : 40 nsec

• Circuit Boards Location

1.6Vp-p
4.1Vp-p
CONNECTOR board
3.8 Vp-p
45 45
HP board
POWER board
PANEL board AUDIO board
UCOM board
SW board
BD (MD) board MD DIGITAL board
HCD-C7NT
JACK board
AMP POWER board
BD (CD) board