Sony TC-FX4 - Page 24

4-3. SCHEMATIC DIAGRAM
— Audio Amp Section —
Note:
Components for right channel have same values as for left
channel. Reference numbers are coded from 200.
All capacitors are in uF unless otherwise noted. pF : uuF
50WV or less are not indicated except for electrolytics
and tantalums.
All
resistors
are
in
ohms,
%W
unless
otherwise
noted.
kQ : 10002,M2 : 1000k2
os nonflammable resistor.
~wt : fusible resistor.
i> : signal path
{(__] : adjustment for repair.
B+ bus.
B- bus.
Voltages are dc with respect to ground unless otherwise
noted.
Readings
are
taken
under
no-signal
conditions
with
a VOM (20 kQ2/V).
no mark: STOP
( ): REC
m : STOP
> : FWD
«<4 | REW
>> =» FF
@ :REC
am: PAUSE
Voltage
variations
may
be
noted
due
to
normal
produc-
tion tolerances.
Switches
$301—304
$305
S306
[Ref.No. [Switch | Position _|
NORMAL
LINE
OFF
—26—
TC.
{REC/PB BOARD] aio! 2sci345
MIC LINE MIC AMP
|
5308
RIG2
Ik
YS" |e]
RIS3. A 10.
CNI604=I
saebwi|
dt
2
Rin
oO
(L) $
usc
Clot
cid!
(
100
J60I1
UK
Mol
ia
22/50V(N)!
lov
uc]
[A
RVIO!
(U)
20k-A
Sea, ge
AEP
MODEL
|
gigs
(Lt)
DIN
CONNECTOR
|
|
|
|
|
|
|
|
leh 2 cae
TO SYSTEM
CONTROL }
ciRCUIT @
HRP ?
ppigi-seozc —~ (PI
CNJ604-2 6
rt
{R)
J60I-2 4
R261
2.2k
9.3V
Q102 2SC1345
AMP
FILTER
R253
° LIOL 27mH
C301 NJM4562
PLAYBACK AMP
Rv202
PLAYBACK
LEVEL
R302 470
~8Vv
C133 75p/500V
(C101
OOLBY
OFF: -37V
ON: -0.01V
REC
habe i oie a ie See es Sel ed
i] (-9.7V)
sande 0311 304 R305
4.7k 33k
33p L— “p)
33, NK] yo304 @ Y
R303 | C303
10k 3.3/25V
C247
33p 77
500V
0304 ISI555 Q3ll = 2SC1364 I
RELAY ORIVE qr:
a:
C37
IV:
20—!20p
7301
12 — 25Vp-p
~O7V
Q309,310 28945
BIAS OSC
>»
a
-8.3V
Q307
2SC1364
BIAS SWITCHING
1201
72!
——_——_— +
.9V
(av)
$301-4 $301-3| | oFF
fal
ae | oN
0305 1SI555
:-2.8V
-0.4V
=2y
ms R337
0305 9307 472m 29
Q308 2SC1364
LINE MUTING
CXIT4-2
DOLBY/LINE AMP/ RECORD AMP ci44
FON,
(-0.01V)
brea
SWITCH
020!
——eood
$302-4
—e——
$303-4 $304-4
Qlo3 251364
&p RECORD MUTING
R141
2.2k(/2W)
Cl3:
RIBG 2.2/50V
\.5k
clas
0.0056
RI39
araizem S28,
R138 180
33k ==C127 0.056
-97V RECORD LEVEL (LJ
RI42
1k
cll
10/i
R143
220k
a R308 455, 303 1S1555
R309 10k R307 100
> nN o $306
$30I-! $302-1 $303-1
R306
us|
OFF
(DOLBY
NR]
a
Tboe kJ I a
aa 7 7
-97V > mn a lane v ae
eee
TYPED Vv
DT cas
$302-2 $303-2 $304-2
Q305 2SA1026
BIAS SWITCH
Q306 2SC1364