Sony HCD-GX25 Service Manual page 20

HCD-GX25
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for 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
specified.
• % : indicates tolerance.
• : internal component.
f
• 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.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltage 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
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c : digital out
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : parts mounted on the conductor side.
x
•
: Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
20
1 / W or less unless otherwise
4
• Waveforms
— BD Board —
(MODE: CD PLAY)
1
0.9Vp-p
(EFMIN)
IC721 3
2
1Vp-p
4 (RF)
IC721
3
0.9Vp-p
16.9344MHz
IC721 rl (XIN)
4
3Vp-p
22µsec
IC721 tk (LRSY)
PANEL Board
— —
1
1.2Vp-p
32.768kHz
(XT1)
IC601 qs
2
1Vp-p
8.64MHz
IC601 (CF1)
qg