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TS-303/505/707
TS-307/507/707
1.
Preparations
1) Place the unit on the workbench. (There should be about 15 mm of space between the base plate of
the unit and the work surface.)
2) Set up the unit as follows.
(1) No load
(2) No signal
(3) Volume turned all the way down
(4) Speaker switch OFF
(5) Power switch OFF
Note) Check the following points before making adjustments
(1) The power switch should be OFF.
(2) The interior of the unit should not be warm.
2. Idling current
adjustment
1) Turn the power switch ON and allow the unit to warm up for about 10 minutes.
(1) Adjust VR370(VR470) so that the voltage at test point R383 (R483) on the power
amp transistor pc circuit board is 18mV42mvV.
NOTE) Semi-fixed resistors enclosed in parentheses (_ } are for the right channel.
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