Diagrams; Notes For Printed Wiring Board And Schematic Diagram - Sony XR-1780 E Model Service Manual

5-1.

NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: internal component.
¢
• b : Pattern from the side which enables seeing.
• Waveform
– MAIN Board –
1 IC1 1 (XIN)
222 ns
SECTION 5

DIAGRAMS

2 Vp-p
– 16 –
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 specified.
4
• : internal component.
¢
• 2 : nonflammable resistor.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power supply
from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : FM
( ) : MW/SW
[ ] : TAPE PLAYBACK
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: MW/SW
E
: TAPE PLAYBACK