Sony TC-FX4 - Page 4

TC-FX4
SERVICE NOTE
The Grounded Circuit On Repairing Shut-Off Detection and Precaution On Repairing
The ground is connected in the numerical order In this set, the shut-off detection is made optical-
as shown below. ly. The take-up reel spindle has five holes, The light
of the lamp received by the light guide is inter-
mittently applied to the photo transistor by means of
the rotation of the reel spindle. The pulse generated
by the photo transistor Q701 is amplified by Q601
and is fed to the mechanism control IC401.
When removing parts, make the grounded circuit
by using the clip cord.
The ground of remote
control connector.
Accordingly, when it is necessary to repair the unit
after removing the ornamental plate, connect an af
oscillator to the collector of Q701 as shown below, so
as not to operate the shut-off mechanism.
The bracket of remote
control connector.
6B
REC level control case
lamp
The frame of mechanism
section
ornamental plate
guide ¢
1
tee
XN
Goh
Vv» ’
0
The
ground
of
a
V
:
raed
reel
amp
section
al
vl
\
0
) \ a i
oa \ Bes. LA
me > ay iN <a >
~ ot a
;
spindle
|
=
2
hole
MD board (conductor side)
1OHz acs
eee ee