2
ICD-U50/U60/U70
Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in Ω and
1
/
4
W or less unless otherwise specified.
• f : internal tolerance.
• C : panel designation.
• A : B+ Line.
•Power voltage is dc 1.5V and fed with regulated dc power supply
from battery terminal.
•Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : PLAY
[ ]
: REC
∗ : Impossible to measure
•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 : PB
L : REC
Note on Printed Wiring Boards:
• Y : parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
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