Sony XM-440EX Service Manual page 8

XM-440EX/440NX
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 in-
dicated except for electrolytics and
tantalums.
• All resistors are in Ω and
1 / W or less un-
4
less otherwise specified.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with
regulated dc power supply from ACC and
BATT cords.
• Voltages and waveforms are dc with re-
spect to ground under no-signal condi-
tions.
no mark : POWER ON
* : Impossible to measure
• Voltage are taken with a VOM (Input im-
pedance 10 MΩ).
Voltage variations may be noted due to
normal production tolerances.
• Signal path.
F
: AUDIO
For printed wiring boards.
Note:
• X : parts extracted from the compo-
nent side.
• WAVEFORMS
1 3
12.8Vp-p
31 µ sec
31 µ sec
2 4
12Vp-p
31 µ sec 31 µ sec
• IC BLOCK DIAGRAM
IC901 TL494CN
16 15 14 13 12 11 10 9
REG.
REF.
ERROR
ERROR
0.1V OSC
1 2 3 4 5 6 7 8
28Vp-p
56Vp-p
8 8