Diagrams - Sony WM-GX221 Service Manual

WM-GX221
Ver 1.2
Note on Schematic Diagram:
• 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
/ W or less unless otherwise specified.
4
• 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
from external power voltage jack (J401).
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
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.
• 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
: AM
E
: PB
d
: REC
N
: MIC INPUT
• Abbreviation
5E : E model with the indication of the country of origin.
9E : E model without the indication of the country of origin.
CH : Chinese model
CND : Canadian model
EA : Saudi Arabia model
TW : Taiwan model
• WAVEFORMS
1
T551 (REC mode)
37 Vp-p
22 µ s
µ
10 V/DIV, 10 s/DIV
10
SECTION 6

DIAGRAMS

2
IC301 r; (VOUT)
(PB mode)
2.5 Vp-p
4.5 ms
1 V/DIV, 2 ms /DIV
Note on Printed Wiring Board:
• Y : parts extracted from the conductor side.
• : Through hole.
a
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.