Diagrams; Circuit Boards Location - Sony HCD-GX20 Service Manual

SECTION 5

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.
• : internal component.
f
• 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 portant le numéro
spécifié.
number specified.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
< > : CD
[ ] : TAPE
• 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
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J
: CD
Note on Printed Wiring Boards:
• X : parts extracted from the component 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.

5-1. Circuit Boards Location

ADDRESS SENSOR board
DRIVER board
SUB TRANS board
REM board
TRANS board
PANEL board
KEYBOARD board
• Waveforms
1
IC751 rf (XOUT)
2
IC601 qd (XT2)
3
IC601 qh (CF2)
19 19
MOTOR board
VIDEO OUT board
SPDL board
MAIN board
POWER board
4
IC102 ws (XOUT)
5.0 Vp-p
5.6 Vp-p
59 ns
222 ns
2 V/DIV, 20 ns/DIV 2 V/DIV, 100 ns/DIV
5
Q209 Collector
(TAPE REC mode)
5.2 Vp-p
13.5 Vp-p
30.5 s
17 s
2 V/DIV, 10 s/DIV 5 V/DIV, 10 s/DIV
4.9 Vp-p
100 ns
2 V/DIV, 40 ns/DIV
HCD-GX20
CD board