Pioneer SX-727 Service Manual page 45

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ADDITIONAL INFORMATION
AM/FM STEREO RECEIVER
SX-727/kuw,
fvzw, fw, kcw.
Please note that the SX-727 PROTECTOR UNIT
number AWM-027 instead of AWM-011 applies to
models (four versions) starting at the respective Serial
numbers as follows:
FVZW
model
1601201
FW model
1200501
KCW
model
3500201
KUW model
3814301
Accordingly, semiconductors used for design of the
SX-727 were changed such as transistors 55 and
diodes 34 in number.
You are requested to make use of this additional
information together with the furnished service
manual.
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PIONEER