Technics RS-273US - Page 16

SCHEMATIC DIAGRAM MODEL RS-273US,RS-273USD
Dey!
Ss
a
a
a
ee
ee
ee
ae
ee
eh
ee
a
tee
ae
oe
Ope
Se
ee
eee
1
|
|
|
-——-—
7
11405
7407
Tr409
LEFT
| si-5
2SC828(R,ST)
2SK37(K)
2ScB28RST)
a
G4)
|
644]
2SA564(0,R,S)
2SC828(R,S,1)
|
|
aor see)
403
LT
_
To MONITOR
AMP
,
|
|
To
REC. AMP
Ig
|
RAT
rw
|
1S2V
O
‘
R451
|
a
.
R445
470K
|
|
|
tao
OP
ik
Wee
;
|
iN
Fue
fh
ees
9
4
|
|
|
|
|
|
|
|
|
al
Son
ct
Eek
f
Oo
|
ees
Sea
ee
:
|
R469
180K
|
7-
-
O
pean
| |
|
To
so-5 |
1406
1r408
Tr410
|
|
RIGHT
|
Gop]
gp
| 28C82B(R.S.T)
— 28K37(K)
2SC828 (R.S.T)
|
|
|
TrAl2
Tr414
|
|
2SA564(0,R,S)
2SC828{R,S,T)
|
Tr402
2SC828
To
MONITOR
AMP
|
|
To REC.
AMP
|
|
|
|
0410
0.8
|
ROA
So0Kb
GaKS.
108V
|
|
R430
:
S34
C418
|
50V0.33
|
R444
680
|
|
|
|
|
|
R470
180K
|
|
a
a
Sa
a
ee
he
a
Ri
SO
A
Bn
si
ot
Nee
tee)
gs
Dn
ee
|
TERMINATIONS (BOTTOM VIEW)
Trl~ 16, 20~22 Tr17,18,19
Tr401~406,409~414
Tr 701,702 ,Tr901~ 904
Tr 407, 408
L401,
402
71,2
13
NOTE:
1. $1-1~S1-9, $2-1~S2-9...Record/playback select switch.
2. $3-1,$3-2 .. ....Input select switch.
SSA oc uhcuasedercaeeasvactntess Power ON/OFF switch.
4. $5-1~S5-8 Tape select switch.
5. S6-1, $6-2 .. -Record muting switch.
6. S7-1~S7-3 acces Dolby NR IN/OUT switch.
TL gi OMe Lies cau tean yy Auto-stop defeat switch.
8. S9.. -Pause switch.
9. $10 ...Memory ON/OFF switch.
10. S11 ...Memory switch.
11. $12 -Rewind switch.
12. $13... -Playback muting switch.
13. $14-1, $14-2 -Peak check switch.
14, $15 -Plunger function switch.
15. $16 -AC voltage select switch.
16. $20 .. -Tape run indicator ON,/OFF switch.
17. VR1,2 .. -Playback equalizer adjustment VR.
18. VR3, 4 -Playback gain adjustment VR.
19. VR5,6 .. .. Record level control.
20. VR7,8 ... ...Record level adjustment VR (for CrO2 tape).
21. VRQ, 10... -Playback level control.
22. VR401~404 ...Dolby NR adjustment VR.
23. VR701, 702 ..-Level meter adjustment VR.
24. VR1101, 1102 -Record level adjustment VR (for normal tape).
25.
26.
27.
28.
29.
30.
VR1103, 1104 .. ....Record equalizer adjustment VR (for CrOz tape).
Resistor values are in ohms (Q), 1/4 watt unless specified otherwise.
K=1,000Q.
Capacitor values are in microfarads (#F) unless specified otherwise.
P=Pico-farads.
The mark () shows test point. e.g. w=test point 1.
All
measurements
are
under
no
signal
conditions
with
volume
at
minimum
position.
Use VTVM for voltage measurements.
The
upper
values
should
be
measured
during
recording
and
the
lower
values
during
playback.