Read Sony HS-JM450 Service Manual online
10
HS-JM450
SECTION 6
DIAGRAMS
• WAVEFORMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. p: pF.
• All capacitors are in µF unless otherwise noted. p: pF.
50 WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and
1
/
4
W or less unless otherwise specified.
•
f
: internal component.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 3 V and fed with regulated dc power supply
• Total current is measured with no cassette installed.
• Power voltage is dc 3 V and fed with regulated dc power supply
from external power voltage jack (J401).
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : PB
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: PB
d
: REC
N
: MIC INPUT
Note on Printed Wiring Board:
•
•
f
: internal component.
• Y : parts extracted from the conductor side.
•
•
a
: Through hole.
Caution:
Pattern face side:
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.
10 V/DIV, 10
µs
/DIV
1 V/DIV,
2 ms
/DIV
1
T551 (REC mode)
37 Vp-p
22 µs
2.5 Vp-p
4.5 ms
2
IC301 r; (VOUT)
(
PB mode
)
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