Sony CFS-B7SMK2 Service Manual page 12

CFS-B7SMK2
QQ
5-2. PRINTED WIRING BOARDS – TUNER SECTION –
3 7 63 1515 0
1
A
B
C
D
TE
L 13942296513
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this 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
1
• : internal component.
¢
• 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.
• H : adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc power supply
from battery terminal.
• Voltages is dc with respect to ground under no-signal (detuned)
conditions.
no mark : FM
( ) : MW/SW
(( )) : PB
<< >>: REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
www
ances.
• Signal path.
F
: FM
E
: PB
a
: REC
L : SW1
g : SW2
f
: MW
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/ W or less unless otherwise specified.
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• Refer to page 11 for Circuit Boards Location.
8
4
Q Q
3 6 7 1 3
• Semiconductor
Location
Ref. No. Location
D1 B-5
D2 B-5
D3 B-2
IC1 C-3
Q1 B-2
Q2 D-4
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• W : indicates side identified with part number.
• b : Pattern from the side which enables seeing.
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