Sony sTR-V200 Service Manual page 6

3-1. CIRCUIT BOARDS LOCATION
PRIMARY board
POWER SW board
KEY board
SPEAKER SW board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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
specified.
¢
• : internal component.
• 2 : nonflammable resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
WAVEFORMS
1
8MHz
IC300 @¢
SECONDARY board
1
/ W or less unless otherwise
4
2
4.8Vp-p
4.19MHz
IC201 #¢ X1
SECTION 3
DIAGRAMS
STANDBY board
DISPLAY board
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• b : Pattern of the conductor side.
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side) the parts face are indicated.
• Indication of transistor
B C E
These are omitted
5.4Vp-p
– 6 –
MAIN board
VOL-TONE board
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from