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DISASSEMBLY FOR REPAIR/BLOCK AND LEVEL DIAGRAM
PREAMP
bling it, perform the following sequences.
1.
2.
3.
Loosen screws of couplers and slide them to the panel
side. ©
Remove 4 screws fixing the phono jack. ()
Loosen screws fixing the rear panel on the chassis and
remove one pair of them on each side.
Incline the rear panel backward. ©)
Take out the preamp unit.
Note:
The wrong position of the coupler happened
not to turn the
selector
knob.
"
M3X8(Br-tap):
N87-3006-46
Preamp
\ X08-1580-11)
Coupler
YX
oe
(D22-0031-04) 'YO\.
~\
TRH
e®
< Disassembly of Equalizer Unit >
Sdi
INPUT
SELECTOR
Z
TUNER
©
7
ye Sie
/
EQ
7
TAPE
FLAT AMP
©)
/
/
MONITOR
« ;
PHONO 1 C=)
SS
62)
60) 5) ©
ae
>
|
|
MODE
@©L— |
PHONO
2 (O}
(XO@- 1880-03)
Or
posents
i
AUX
(®
is
Oo)
GAIN
REC.
Cc
;
BALANCE
,
Sle
(q)F APE
A
PLAY
(OJ
dy Sta
REC.
(OD
FREQ (<) Sis
0S) Lever
TAPE
B
PLAY
©
= LOUDNESS
7 7
4o #8)
°
:
D
RY
DIN
30
20
10
0
®©®-DO®
©
©)
18OmVv
-30
Bl
i |
-40
#8
-50—|
@
2.5mv
{X11-1430-10)
ONE
Si7,e
FILTER
r
CONTROL
(DEFEAT)
Ne gl
(2) {R}LRIR)-4
42)
ee
a
ae
Tauasonic we iA
y ®
|
lemma
®
POWER TRANSISTOR
The power
amplifier unit includes the power supply
and the protection circuit.
The power amplifier unit can
be checked and repair with the case and the bottom plate
removed.
if necessary to replace the left-channel power
transistor, remove
6 screws on the framework.
At this
time, lifting the power amplifier block leftwards facilitates
the work. (Refer to below figure.)
< Replacement of Power Transistor >
Sig
(X07-1840-11)
oc.
8)
PRE/OUT
POWER
AMP
HIGH
POWER IN
SPEAKERS
40) SPEAKERS
a
A
BABtEC TON
(O) SreOkens
(©) PHONES
(8)
© (5) POWER Ih
(O) PRE, OUT
OdgB=-1V
f: 1 kHz
(9) 24 SVEN
26d8
< Block/Level Diagram >
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