Schematic Diagrams; Waveforms - Sony RDR-GX300 Service Manual

RDR-GX300

4-2. SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
(For schematic diagrams)
• All capacitors are in µF unless otherwise noted. pF : µµF.
50V or less are not indicated except for electrolytics and
tantalums.
• All resistors are in ohms, 1/4 W (Chip resistors : 1 /10 W) un-less
otherwise specified.
kΩ=1000Ω, MΩ=1000kΩ.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum capacitor, be-
cause it is damaged by the heat.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
• 2 : non flammable resistor
• 5 : fusible resistor
• C : panel designation
• f : internal component.
• C : adjustment for repair.
• U : B+ Line
• V : B– Line
• Circled numbers refer to waveforms.
• Voltages are dc between measurement point.
• Readings are taken with a color-bar signals on DVD reference
disc.
• Readings are taken with a digital multimeter (DC 10MW).
• Voltage variations may be noted due to normal production toler-
ances.
The components identified by mark 0or
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
When indicating parts by reference number, please include
the board name.

WAVEFORMS

AV-84
4-3
WAVEFORMS
AV-84
BOARD
1 6
IC603 0 IC802 ws
3.1 Vp-p
H
30.4 us
2 7
IC603 qs IC802 wf
5.2 Vp-p
H
100 ns
3 8
IC603 <zzb IC802 wl
1.0 Vp-p
225.5 ns
4 9
IC607 7 IC802 ea
5.5 Vp-p
225.5 ns H
5 q;
IC802 w; IC802 ed
1.0 Vp-p
H H
1.0 Vp-p
2.0 Vp-p
2.1 Vp-p
H
1.3 Vp-p
1.0 Vp-p
4-4