Diagrams; Circuit Boards Location - Sony HCD-DX8 Service Manual

SECTION 7

DIAGRAMS

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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.
• % : indicates tolerance.
• f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : 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.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
f : AM
E
: PB (DECK A)
d : PB (DECK B)
G
: REC (DECK B)
J : CD
c : digital out
• Abbreviation
AUS : Australian model
EA : Saudi Arabia model
MX : Mexican model
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
• Indication of transistor.
C
Q These are omitted.
B E
Q
B C E
These are omitted.

7-1. CIRCUIT BOARDS LOCATION

SENSOR board
TRANS board
CD SWITCH board
PANEL board
LEAF SW board
HEAD (A) board
HEAD (B) board
• WAVEFORMS
– BD BOARD –
1 3
IC101 yj IC101 ra
CD PLAY MODE CD PLAY MODE
6.4Vp-p
16.9344MHz
2 4
IC101 ta IC101 el
CD PLAY MODE CD PLAY MODE
400nsec/div 1.2Vp-p
– PANEL BOARD –
1
IC601 oa
STOP MODE
4.8Vp-p
12.5MHz
21 21
MOTOR board
DRIVER board
BD board
POWER AMP board
– MAIN BOARD –
1 3
IC401 qa
STOP MODE
approx 200mVp-p
3.0Vp-p
32.768kHz
2
IC401 qd
STOP MODE
approx 170mVp-p
3.4Vp-p
16MHz
HCD-DX8
MAIN board
T301 4
TAPE B REC MODE
120Vp-p
80.7kHz